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2015-08-10s390/sclp: clear upper register halves in _sclp_print_earlyMartin Schwidefsky
commit f9c87a6f46d508eae0d9ae640be98d50f237f827 upstream. If the kernel is compiled with gcc 5.1 and the XZ compression option the decompress_kernel function calls _sclp_print_early in 64-bit mode while the content of the upper register half of %r6 is non-zero. This causes a specification exception on the servc instruction in _sclp_servc. The _sclp_print_early function saves and restores the upper registers halves but it fails to clear them for the 31-bit code of the mini sclp driver. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-06-06crypto: s390/ghash - Fix incorrect ghash icv buffer handling.Harald Freudenberger
commit a1cae34e23b1293eccbcc8ee9b39298039c3952a upstream. Multitheaded tests showed that the icv buffer in the current ghash implementation is not handled correctly. A move of this working ghash buffer value to the descriptor context fixed this. Code is tested and verified with an multithreaded application via af_alg interface. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Gerald Schaefer <geraldsc@linux.vnet.ibm.com> Reported-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-06nosave: consolidate __nosave_{begin,end} in <asm/sections.h>Geert Uytterhoeven
commit 7f8998c7aef3ac9c5f3f2943e083dfa6302e90d0 upstream. The different architectures used their own (and different) declarations: extern __visible const void __nosave_begin, __nosave_end; extern const void __nosave_begin, __nosave_end; extern long __nosave_begin, __nosave_end; Consolidate them using the first variant in <asm/sections.h>. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-06s390/hibernate: fix save and restore of kernel text sectionHeiko Carstens
commit d74419495633493c9cd3f2bbeb7f3529d0edded6 upstream. Sebastian reported a crash caused by a jump label mismatch after resume. This happens because we do not save the kernel text section during suspend and therefore also do not restore it during resume, but use the kernel image that restores the old system. This means that after a suspend/resume cycle we lost all modifications done to the kernel text section. The reason for this is the pfn_is_nosave() function, which incorrectly returns that read-only pages don't need to be saved. This is incorrect since we mark the kernel text section read-only. We still need to make sure to not save and restore pages contained within NSS and DCSS segment. To fix this add an extra case for the kernel text section and only save those pages if they are not contained within an NSS segment. Fixes the following crash (and the above bugs as well): Jump label code mismatch at netif_receive_skb_internal+0x28/0xd0 Found: c0 04 00 00 00 00 Expected: c0 f4 00 00 00 11 New: c0 04 00 00 00 00 Kernel panic - not syncing: Corrupted kernel text CPU: 0 PID: 9 Comm: migration/0 Not tainted 3.19.0-01975-gb1b096e70f23 #4 Call Trace: [<0000000000113972>] show_stack+0x72/0xf0 [<000000000081f15e>] dump_stack+0x6e/0x90 [<000000000081c4e8>] panic+0x108/0x2b0 [<000000000081be64>] jump_label_bug.isra.2+0x104/0x108 [<0000000000112176>] __jump_label_transform+0x9e/0xd0 [<00000000001121e6>] __sm_arch_jump_label_transform+0x3e/0x50 [<00000000001d1136>] multi_cpu_stop+0x12e/0x170 [<00000000001d1472>] cpu_stopper_thread+0xb2/0x168 [<000000000015d2ac>] smpboot_thread_fn+0x134/0x1b0 [<0000000000158baa>] kthread+0x10a/0x110 [<0000000000824a86>] kernel_thread_starter+0x6/0xc Reported-and-tested-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-05-06KVM: s390: Zero out current VMDB of STSI before including level3 data.Ekaterina Tumanova
commit b75f4c9afac2604feb971441116c07a24ecca1ec upstream. s390 documentation requires words 0 and 10-15 to be reserved and stored as zeros. As we fill out all other fields, we can memset the full structure. Signed-off-by: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com> Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-29vm: add VM_FAULT_SIGSEGV handling supportLinus Torvalds
commit 33692f27597fcab536d7cbbcc8f52905133e4aa7 upstream. The core VM already knows about VM_FAULT_SIGBUS, but cannot return a "you should SIGSEGV" error, because the SIGSEGV case was generally handled by the caller - usually the architecture fault handler. That results in lots of duplication - all the architecture fault handlers end up doing very similar "look up vma, check permissions, do retries etc" - but it generally works. However, there are cases where the VM actually wants to SIGSEGV, and applications _expect_ SIGSEGV. In particular, when accessing the stack guard page, libsigsegv expects a SIGSEGV. And it usually got one, because the stack growth is handled by that duplicated architecture fault handler. However, when the generic VM layer started propagating the error return from the stack expansion in commit fee7e49d4514 ("mm: propagate error from stack expansion even for guard page"), that now exposed the existing VM_FAULT_SIGBUS result to user space. And user space really expected SIGSEGV, not SIGBUS. To fix that case, we need to add a VM_FAULT_SIGSEGV, and teach all those duplicate architecture fault handlers about it. They all already have the code to handle SIGSEGV, so it's about just tying that new return value to the existing code, but it's all a bit annoying. This is the mindless minimal patch to do this. A more extensive patch would be to try to gather up the mostly shared fault handling logic into one generic helper routine, and long-term we really should do that cleanup. Just from this patch, you can generally see that most architectures just copied (directly or indirectly) the old x86 way of doing things, but in the meantime that original x86 model has been improved to hold the VM semaphore for shorter times etc and to handle VM_FAULT_RETRY and other "newer" things, so it would be a good idea to bring all those improvements to the generic case and teach other architectures about them too. Reported-and-tested-by: Takashi Iwai <tiwai@suse.de> Tested-by: Jan Engelhardt <jengelh@inai.de> Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com> # "s390 still compiles and boots" Cc: linux-arch@vger.kernel.org Cc: stable@vger.kernel.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [shengyong: Backport to 3.14 - adjust context - ignore modification for arch nios2, because 3.14 does not support it - add SIGSEGV handling to powerpc/cell spu_fault.c, because 3.14 does not separate it to copro_fault.c - add SIGSEGV handling to mm/memory.c, because 3.14 does not separate it to gup.c ] Signed-off-by: Sheng Yong <shengyong1@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-29crypto: prefix module autoloading with "crypto-"Kees Cook
commit 5d26a105b5a73e5635eae0629b42fa0a90e07b7b upstream. This prefixes all crypto module loading with "crypto-" so we never run the risk of exposing module auto-loading to userspace via a crypto API, as demonstrated by Mathias Krause: https://lkml.org/lkml/2013/3/4/70 Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-01-08groups: Consolidate the setgroups permission checksEric W. Biederman
commit 7ff4d90b4c24a03666f296c3d4878cd39001e81e upstream. Today there are 3 instances of setgroups and due to an oversight their permission checking has diverged. Add a common function so that they may all share the same permission checking code. This corrects the current oversight in the current permission checks and adds a helper to avoid this in the future. A user namespace security fix will update this new helper, shortly. Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-10-30KVM: s390: unintended fallthrough for external callChristian Borntraeger
commit f346026e55f1efd3949a67ddd1dcea7c1b9a615e upstream. We must not fallthrough if the conditions for external call are not met. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-10-05KVM: s390/mm: try a cow on read only pages for key opsChristian Borntraeger
commit ab3f285f227fec62868037e9b1b1fd18294a83b8 upstream. The PFMF instruction handler blindly wrote the storage key even if the page was mapped R/O in the host. Lets try a COW before continuing and bail out in case of errors. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Dominik Dingel <dingel@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-17s390/locking: Reenable optimistic spinningChristian Borntraeger
commit 36e7fdaa1a04fcf65b864232e1af56a51c7814d6 upstream. commit 4badad352a6bb202ec68afa7a574c0bb961e5ebc (locking/mutex: Disable optimistic spinning on some architectures) fenced spinning for architectures without proper cmpxchg. There is no need to disable mutex spinning on s390, though: The instructions CS,CSG and friends provide the proper guarantees. (We dont implement cmpxchg with locks). Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-07-31s390/ptrace: fix PSW mask checkMartin Schwidefsky
commit dab6cf55f81a6e16b8147aed9a843e1691dcd318 upstream. The PSW mask check of the PTRACE_POKEUSR_AREA command is incorrect. The PSW_MASK_USER define contains the PSW_MASK_ASC bits, the ptrace interface accepts all combinations for the address-space-control bits. To protect the kernel space the PSW mask check in ptrace needs to reject the address-space-control bit combination for home space. Fixes CVE-2014-3534 Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30s390/lowcore: reserve 96 bytes for IRB in lowcoreChristian Borntraeger
commit 993072ee67aa179c48c85eb19869804e68887d86 upstream. The IRB might be 96 bytes if the extended-I/O-measurement facility is used. This feature is currently not used by Linux, but struct irb already has the emw defined. So let's make the irb in lowcore match the size of the internal data structure to be future proof. We also have to add a pad, to correctly align the paste. The bigger irb field also circumvents a bug in some QEMU versions that always write the emw field on test subchannel and therefore destroy the paste definitions of this CPU. Running under these QEMU version broke some timing functions in the VDSO and all users of these functions, e.g. some JREs. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30s390/time: cast tv_nsec to u64 prior to shift in update_vsyscallMartin Schwidefsky
commit b6f4296279ab3ada554d993d12844272fd86b36a upstream. Analog to git commit 28b92e09e25bdc0ae864b22eacf195a74f861389 first cast tk->wall_to_monotonic.tv_nsec to u64 before doing the shift with tk->shift to avoid loosing relevant bits on a 32-bit kernel. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-30hugetlb: restrict hugepage_migration_support() to x86_64Naoya Horiguchi
commit c177c81e09e517bbf75b67762cdab1b83aba6976 upstream. Currently hugepage migration is available for all archs which support pmd-level hugepage, but testing is done only for x86_64 and there're bugs for other archs. So to avoid breaking such archs, this patch limits the availability strictly to x86_64 until developers of other archs get interested in enabling this feature. Simply disabling hugepage migration on non-x86_64 archs is not enough to fix the reported problem where sys_move_pages() hits the BUG_ON() in follow_page(FOLL_GET), so let's fix this by checking if hugepage migration is supported in vma_migratable(). Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Reported-by: Michael Ellerman <mpe@ellerman.id.au> Tested-by: Michael Ellerman <mpe@ellerman.id.au> Acked-by: Hugh Dickins <hughd@google.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: David Miller <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-06-07crypto: s390 - fix aes,des ctr mode concurrency finding.Harald Freudenberger
commit 3901c1124ec5099254a9396085f7798153a7293f upstream. An additional testcase found an issue with the last series of patches applied: the fallback solution may not save the iv value after operation. This very small fix just makes sure the iv is copied back to the walk/desc struct. Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-31net: filter: s390: fix JIT address randomizationHeiko Carstens
[ Upstream commit e84d2f8d2ae33c8215429824e1ecf24cbca9645e ] This is the s390 variant of Alexei's JIT bug fix. (patch description below stolen from Alexei's patch) bpf_alloc_binary() adds 128 bytes of room to JITed program image and rounds it up to the nearest page size. If image size is close to page size (like 4000), it is rounded to two pages: round_up(4000 + 4 + 128) == 8192 then 'hole' is computed as 8192 - (4000 + 4) = 4188 If prandom_u32() % hole selects a number >= PAGE_SIZE - sizeof(*header) then kernel will crash during bpf_jit_free(): kernel BUG at arch/x86/mm/pageattr.c:887! Call Trace: [<ffffffff81037285>] change_page_attr_set_clr+0x135/0x460 [<ffffffff81694cc0>] ? _raw_spin_unlock_irq+0x30/0x50 [<ffffffff810378ff>] set_memory_rw+0x2f/0x40 [<ffffffffa01a0d8d>] bpf_jit_free_deferred+0x2d/0x60 [<ffffffff8106bf98>] process_one_work+0x1d8/0x6a0 [<ffffffff8106bf38>] ? process_one_work+0x178/0x6a0 [<ffffffff8106c90c>] worker_thread+0x11c/0x370 since bpf_jit_free() does: unsigned long addr = (unsigned long)fp->bpf_func & PAGE_MASK; struct bpf_binary_header *header = (void *)addr; to compute start address of 'bpf_binary_header' and header->pages will pass junk to: set_memory_rw(addr, header->pages); Fix it by making sure that &header->image[prandom_u32() % hole] and &header are in the same page. Fixes: aa2d2c73c21f2 ("s390/bpf,jit: address randomize and write protect jit code") Reported-by: Alexei Starovoitov <ast@plumgrid.com> Cc: <stable@vger.kernel.org> # v3.11+ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-13s390/bpf,jit: initialize A register if 1st insn is BPF_S_LDX_B_MSHMartin Schwidefsky
commit 6e0de817594c61f3b392a9245deeb09609ec707d upstream. The A register needs to be initialized to zero in the prolog if the first instruction of the BPF program is BPF_S_LDX_B_MSH to prevent leaking the content of %r5 to user space. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-06s390: fix control register updateMartin Schwidefsky
commit a8a934e44f2bd0ed613e1aa0471e3478c6a9228a upstream. The git commit c63badebfebacdba827ab1cc1d420fc81bd8d818 "s390: optimize control register update" broke the update for control register 0. After the update do the lctlg from the correct value. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-06s390/bitops,atomic: add missing memory barriersHeiko Carstens
commit 0ccc8b7ac86053388e793bad20bd26bd777752eb upstream. When reworking the bitops and atomic ops I missed that those instructions that got atomic behaviour only perform a "specific-operand-serialization" instead of a full "serialization". The compare-and-swap instruction used before performs a full serialization before and after the instruction is executed, which means it has full memory barrier semantics. In order to give the new bitops and atomic ops functions also full memory barrier semantics add a "bcr 14,0" before and after each of those new instructions which performs full serialization as well. This restores memory barrier semantics for bitops and atomic ops functions which return values, like e.g. atomic_add_return(), but not for functions which do not return a value, like e.g. atomic_add(). This is consistent to other architectures and what common code requires. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-06KVM: s390: Optimize ucontrol pathChristian Borntraeger
commit 2955c83f72801245afd0fe5c560cc75b82bea9aa upstream. Since commit 7c470539c95630c1f2a10f109e96f249730b75eb (s390/kvm: avoid automatic sie reentry) we will run through the C code of KVM on host interrupts instead of just reentering the guest. This will result in additional ucontrol exits (at least HZ per second). Let handle a 0 intercept in the kernel and dont return to userspace, even if in ucontrol mode. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-05-06s390/cio: fix driver callback initialization for ccw consolesSebastian Ott
commit 2253e8d79237c69086ded391e6767afe16972527 upstream. ccw consoles are in use before they can be properly registered with the driver core. For devices which are in use by a device driver we rely on the ccw_device's pointer to the driver callbacks to be valid. For ccw consoles this pointer is NULL until they are registered later during boot and we dereferenced this pointer. This worked by chance on 64 bit builds (cdev->drv was NULL but the optional callback cdev->drv->path_event was also NULL by coincidence) and was unnoticed until we received reports about boot failures on 31 bit systems. Fix it by initializing the driver pointer for ccw consoles. Reported-by: Mike Frysinger <vapier@gentoo.org> Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com> Reviewed-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-04-14futex: Allow architectures to skip futex_atomic_cmpxchg_inatomic() testHeiko Carstens
commit 03b8c7b623c80af264c4c8d6111e5c6289933666 upstream. If an architecture has futex_atomic_cmpxchg_inatomic() implemented and there is no runtime check necessary, allow to skip the test within futex_init(). This allows to get rid of some code which would always give the same result, and also allows the compiler to optimize a couple of if statements away. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Finn Thain <fthain@telegraphics.com.au> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Link: http://lkml.kernel.org/r/20140302120947.GA3641@osiris Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-02-21s390/pci/dma: use correct segment boundary sizeGerald Schaefer
The boundary size for iommu_area_alloc() is currently set to a constant value. This is wrong, we shouldn't use a constant value but rather the return value of dma_get_seg_boundary(), since a device driver can override the default. Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-02-21s390/compat: fix sys_sched_getattr compat wrapperHeiko Carstens
Fix stupid typo. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-02-11Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 bugfixes from Martin Schwidefsky: "A collection a bug fixes. Most of them are minor but two of them are more severe. The linkage stack bug can be used by user space to force an oops, with panic_on_oops this is a denial-of-service. And the dump memory detection issue can cause incomplete memory dumps" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/cio: improve cio_commit_config s390: fix kernel crash due to linkage stack instructions s390/dump: Fix dump memory detection s390/appldata: restore missing init_virt_timer() s390/qdio: correct program-controlled interruption checking s390/qdio: for_each macro correctness
2014-02-05Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds
Pull crypto fixes from Herbert Xu: "This fixes a number of concurrency issues on s390 where multiple users of the same crypto transform may clobber each other's results" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: s390 - fix des and des3_ede ctr concurrency issue crypto: s390 - fix des and des3_ede cbc concurrency issue crypto: s390 - fix concurrency issue in aes-ctr mode
2014-02-05s390: fix kernel crash due to linkage stack instructionsMartin Schwidefsky
The kernel currently crashes with a low-address-protection exception if a user space process executes an instruction that tries to use the linkage stack. Set the base-ASTE origin and the subspace-ASTE origin of the dispatchable-unit-control-table to point to a dummy ASTE. Set up control register 15 to point to an empty linkage stack with no room left. A user space process with a linkage stack instruction will still crash but with a different exception which is correctly translated to a segmentation fault instead of a kernel oops. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-02-04s390/dump: Fix dump memory detectionMichael Holzheu
Dumps created by kdump or zfcpdump can contain invalid memory holes when dumping z/VM systems that have memory pressure. For example: # zgetdump -i /proc/vmcore. Memory map: 0000000000000000 - 0000000000bfffff (12 MB) 0000000000e00000 - 00000000014fffff (7 MB) 000000000bd00000 - 00000000f3bfffff (3711 MB) The memory detection function find_memory_chunks() issues tprot to find valid memory chunks. In case of CMM it can happen that pages are marked as unstable via set_page_unstable() in arch_free_page(). If z/VM has released that pages, tprot returns -EFAULT and indicates a memory hole. So fix this and switch off CMM in case of kdump or zfcpdump. Cc: <stable@vger.kernel.org> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-31Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull more KVM updates from Paolo Bonzini: "Second batch of KVM updates. Some minor x86 fixes, two s390 guest features that need some handling in the host, and all the PPC changes. The PPC changes include support for little-endian guests and enablement for new POWER8 features" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (45 commits) x86, kvm: correctly access the KVM_CPUID_FEATURES leaf at 0x40000101 x86, kvm: cache the base of the KVM cpuid leaves kvm: x86: move KVM_CAP_HYPERV_TIME outside #ifdef KVM: PPC: Book3S PR: Cope with doorbell interrupts KVM: PPC: Book3S HV: Add software abort codes for transactional memory KVM: PPC: Book3S HV: Add new state for transactional memory powerpc/Kconfig: Make TM select VSX and VMX KVM: PPC: Book3S HV: Basic little-endian guest support KVM: PPC: Book3S HV: Add support for DABRX register on POWER7 KVM: PPC: Book3S HV: Prepare for host using hypervisor doorbells KVM: PPC: Book3S HV: Handle new LPCR bits on POWER8 KVM: PPC: Book3S HV: Handle guest using doorbells for IPIs KVM: PPC: Book3S HV: Consolidate code that checks reason for wake from nap KVM: PPC: Book3S HV: Implement architecture compatibility modes for POWER8 KVM: PPC: Book3S HV: Add handler for HV facility unavailable KVM: PPC: Book3S HV: Flush the correct number of TLB sets on POWER8 KVM: PPC: Book3S HV: Context-switch new POWER8 SPRs KVM: PPC: Book3S HV: Align physical and virtual CPU thread numbers KVM: PPC: Book3S HV: Don't set DABR on POWER8 kvm/ppc: IRQ disabling cleanup ...
2014-01-30crypto: s390 - fix des and des3_ede ctr concurrency issueHarald Freudenberger
In s390 des and 3des ctr mode there is one preallocated page used to speed up the en/decryption. This page is not protected against concurrent usage and thus there is a potential of data corruption with multiple threads. The fix introduces locking/unlocking the ctr page and a slower fallback solution at concurrency situations. Cc: stable@vger.kernel.org Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-01-30crypto: s390 - fix des and des3_ede cbc concurrency issueHarald Freudenberger
In s390 des and des3_ede cbc mode the iv value is not protected against concurrency access and modifications from another running en/decrypt operation which is using the very same tfm struct instance. This fix copies the iv to the local stack before the crypto operation and stores the value back when done. Cc: stable@vger.kernel.org Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-01-30crypto: s390 - fix concurrency issue in aes-ctr modeHarald Freudenberger
The aes-ctr mode uses one preallocated page without any concurrency protection. When multiple threads run aes-ctr encryption or decryption this can lead to data corruption. The patch introduces locking for the page and a fallback solution with slower en/decryption performance in concurrency situations. Cc: stable@vger.kernel.org Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-01-29s390/compat: change parameter types from unsigned long to compat_ulong_tHeiko Carstens
Change parameter types of s390's compat ipc syscall from unsigned long to compat_ulong_t to enforce zero extension of these parameters. This is not really a bug, since s390_ipc compat syscall is only a wrapper to the generic compat_sys_ipc() syscall, which performs correct zero and sign extension. This was introduced with commit 56e41d3c5aa8 ("merge compat sys_ipc instances"). Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Ingo Molnar <mingo@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-29s390/appldata: restore missing init_virt_timer()Gerald Schaefer
Commit 27f6b416 "s390/vtimer: rework virtual timer interface" removed the call to init_virt_timer() by mistake, which is added again by this patch. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-28Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 patches from Martin Schwidefsky: "A new binary interface to be able to query and modify the LPAR scheduler weight and cap settings. Some improvements for the hvc terminal over iucv and a couple of bux fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/hypfs: add interface for diagnose 0x304 s390: wire up sys_sched_setattr/sys_sched_getattr s390/uapi: fix struct statfs64 definition s390/uaccess: remove dead extern declarations, make functions static s390/uaccess: test if current->mm is set before walking page tables s390/zfcpdump: make zfcpdump depend on 64BIT s390/32bit: fix cmpxchg64 s390/xpram: don't modify module parameters s390/zcrypt: remove zcrypt kmsg documentation again s390/hvc_iucv: Automatically assign free HVC terminal devices s390/hvc_iucv: Display connection details through device attributes s390/hvc_iucv: fix sparse warning s390/vmur: Link parent CCW device during UR device creation
2014-01-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
Pull networking updates from David Miller: 1) BPF debugger and asm tool by Daniel Borkmann. 2) Speed up create/bind in AF_PACKET, also from Daniel Borkmann. 3) Correct reciprocal_divide and update users, from Hannes Frederic Sowa and Daniel Borkmann. 4) Currently we only have a "set" operation for the hw timestamp socket ioctl, add a "get" operation to match. From Ben Hutchings. 5) Add better trace events for debugging driver datapath problems, also from Ben Hutchings. 6) Implement auto corking in TCP, from Eric Dumazet. Basically, if we have a small send and a previous packet is already in the qdisc or device queue, defer until TX completion or we get more data. 7) Allow userspace to manage ipv6 temporary addresses, from Jiri Pirko. 8) Add a qdisc bypass option for AF_PACKET sockets, from Daniel Borkmann. 9) Share IP header compression code between Bluetooth and IEEE802154 layers, from Jukka Rissanen. 10) Fix ipv6 router reachability probing, from Jiri Benc. 11) Allow packets to be captured on macvtap devices, from Vlad Yasevich. 12) Support tunneling in GRO layer, from Jerry Chu. 13) Allow bonding to be configured fully using netlink, from Scott Feldman. 14) Allow AF_PACKET users to obtain the VLAN TPID, just like they can already get the TCI. From Atzm Watanabe. 15) New "Heavy Hitter" qdisc, from Terry Lam. 16) Significantly improve the IPSEC support in pktgen, from Fan Du. 17) Allow ipv4 tunnels to cache routes, just like sockets. From Tom Herbert. 18) Add Proportional Integral Enhanced packet scheduler, from Vijay Subramanian. 19) Allow openvswitch to mmap'd netlink, from Thomas Graf. 20) Key TCP metrics blobs also by source address, not just destination address. From Christoph Paasch. 21) Support 10G in generic phylib. From Andy Fleming. 22) Try to short-circuit GRO flow compares using device provided RX hash, if provided. From Tom Herbert. The wireless and netfilter folks have been busy little bees too. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (2064 commits) net/cxgb4: Fix referencing freed adapter ipv6: reallocate addrconf router for ipv6 address when lo device up fib_frontend: fix possible NULL pointer dereference rtnetlink: remove IFLA_BOND_SLAVE definition rtnetlink: remove check for fill_slave_info in rtnl_have_link_slave_info qlcnic: update version to 5.3.55 qlcnic: Enhance logic to calculate msix vectors. qlcnic: Refactor interrupt coalescing code for all adapters. qlcnic: Update poll controller code path qlcnic: Interrupt code cleanup qlcnic: Enhance Tx timeout debugging. qlcnic: Use bool for rx_mac_learn. bonding: fix u64 division rtnetlink: add missing IFLA_BOND_AD_INFO_UNSPEC sfc: Use the correct maximum TX DMA ring size for SFC9100 Add Shradha Shah as the sfc driver maintainer. net/vxlan: Share RX skb de-marking and checksum checks with ovs tulip: cleanup by using ARRAY_SIZE() ip_tunnel: clear IPCB in ip_tunnel_xmit() in case dst_link_failure() is called net/cxgb4: Don't retrieve stats during recovery ...
2014-01-24s390/hypfs: add interface for diagnose 0x304Martin Schwidefsky
To provide access to the set-partition-resource-parameter interface to user space add a new attribute to hypfs/debugfs: * s390_hypsfs/diag_304 The data for the query-partition-resource-parameters command can be access by a read on the attribute. All other diagnose 0x304 requests need to be submitted via ioctl with CAP_SYS_ADMIN rights. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-23Merge branch 'akpm' (incoming from Andrew)Linus Torvalds
Merge second patch-bomb from Andrew Morton: - various misc bits - the rest of MM - add generic fixmap.h, use it - backlight updates - dynamic_debug updates - printk() updates - checkpatch updates - binfmt_elf - ramfs - init/ - autofs4 - drivers/rtc - nilfs - hfsplus - Documentation/ - coredump - procfs - fork - exec - kexec - kdump - partitions - rapidio - rbtree - userns - memstick - w1 - decompressors * emailed patches from Andrew Morton <akpm@linux-foundation.org>: (197 commits) lib/decompress_unlz4.c: always set an error return code on failures romfs: fix returm err while getting inode in fill_super drivers/w1/masters/w1-gpio.c: add strong pullup emulation drivers/memstick/host/rtsx_pci_ms.c: fix ms card data transfer bug userns: relax the posix_acl_valid() checks arch/sh/kernel/dwarf.c: use rbtree postorder iteration helper instead of solution using repeated rb_erase() fs-ext3-use-rbtree-postorder-iteration-helper-instead-of-opencoding-fix fs/ext3: use rbtree postorder iteration helper instead of opencoding fs/jffs2: use rbtree postorder iteration helper instead of opencoding fs/ext4: use rbtree postorder iteration helper instead of opencoding fs/ubifs: use rbtree postorder iteration helper instead of opencoding net/netfilter/ipset/ip_set_hash_netiface.c: use rbtree postorder iteration instead of opencoding rbtree/test: test rbtree_postorder_for_each_entry_safe() rbtree/test: move rb_node to the middle of the test struct rapidio: add modular rapidio core build into powerpc and mips branches partitions/efi: complete documentation of gpt kernel param purpose kdump: add /sys/kernel/vmcoreinfo ABI documentation kdump: fix exported size of vmcoreinfo note kexec: add sysctl to disable kexec_load fs/exec.c: call arch_pick_mmap_layout() only once ...
2014-01-23Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6Linus Torvalds
Pull crypto update from Herbert Xu: "Here is the crypto update for 3.14: - Improved crypto_memneq helper - Use cyprto_memneq in arch-specific crypto code - Replaced orphaned DCP driver with Freescale MXS DCP driver - Added AVX/AVX2 version of AESNI-GCM encode and decode - Added AMD Cryptographic Coprocessor (CCP) driver - Misc fixes" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (41 commits) crypto: aesni - fix build on x86 (32bit) crypto: mxs - Fix sparse non static symbol warning crypto: ccp - CCP device enabled/disabled changes crypto: ccp - Cleanup hash invocation calls crypto: ccp - Change data length declarations to u64 crypto: ccp - Check for caller result area before using it crypto: ccp - Cleanup scatterlist usage crypto: ccp - Apply appropriate gfp_t type to memory allocations crypto: drivers - Sort drivers/crypto/Makefile ARM: mxs: dts: Enable DCP for MXS crypto: mxs - Add Freescale MXS DCP driver crypto: mxs - Remove the old DCP driver crypto: ahash - Fully restore ahash request before completing crypto: aesni - fix build on x86 (32bit) crypto: talitos - Remove redundant dev_set_drvdata crypto: ccp - Remove redundant dev_set_drvdata crypto: crypto4xx - Remove redundant dev_set_drvdata crypto: caam - simplify and harden key parsing crypto: omap-sham - Fix Polling mode for larger blocks crypto: tcrypt - Added speed tests for AEAD crypto alogrithms in tcrypt test suite ...
2014-01-23Kconfig: update flightly outdated CONFIG_SMP documentationRobert Graffham
Remove an outdated reference to "most personal computers" having only one CPU, and change the use of "singleprocessor" and "single processor" in CONFIG_SMP's documentation to "uniprocessor" across all arches where that documentation is present. Signed-off-by: Robert Graffham <psquid@psquid.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-01-23Merge tag 'kvm-s390-20140117' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-queue This deals with 2 guest features that need enablement in the kvm host: - transactional execution - lpp sampling support In addition there is also a fix to the virtio-ccw guest driver. This will enable future features
2014-01-22Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM updates from Paolo Bonzini: "First round of KVM updates for 3.14; PPC parts will come next week. Nothing major here, just bugfixes all over the place. The most interesting part is the ARM guys' virtualized interrupt controller overhaul, which lets userspace get/set the state and thus enables migration of ARM VMs" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (67 commits) kvm: make KVM_MMU_AUDIT help text more readable KVM: s390: Fix memory access error detection KVM: nVMX: Update guest activity state field on L2 exits KVM: nVMX: Fix nested_run_pending on activity state HLT KVM: nVMX: Clean up handling of VMX-related MSRs KVM: nVMX: Add tracepoints for nested_vmexit and nested_vmexit_inject KVM: nVMX: Pass vmexit parameters to nested_vmx_vmexit KVM: nVMX: Leave VMX mode on clearing of feature control MSR KVM: VMX: Fix DR6 update on #DB exception KVM: SVM: Fix reading of DR6 KVM: x86: Sync DR7 on KVM_SET_DEBUGREGS add support for Hyper-V reference time counter KVM: remove useless write to vcpu->hv_clock.tsc_timestamp KVM: x86: fix tsc catchup issue with tsc scaling KVM: x86: limit PIT timer frequency KVM: x86: handle invalid root_hpa everywhere kvm: Provide kvm_vcpu_eligible_for_directed_yield() stub kvm: vfio: silence GCC warning KVM: ARM: Remove duplicate include arm/arm64: KVM: relax the requirements of VMA alignment for THP ...
2014-01-22Merge tag 'pci-v3.14-changes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci Pull PCI updates from Bjorn Helgaas: "PCI changes for the v3.14 merge window: Resource management - Change pci_bus_region addresses to dma_addr_t (Bjorn Helgaas) - Support 64-bit AGP BARs (Bjorn Helgaas, Yinghai Lu) - Add pci_bus_address() to get bus address of a BAR (Bjorn Helgaas) - Use pci_resource_start() for CPU address of AGP BARs (Bjorn Helgaas) - Enforce bus address limits in resource allocation (Yinghai Lu) - Allocate 64-bit BARs above 4G when possible (Yinghai Lu) - Convert pcibios_resource_to_bus() to take pci_bus, not pci_dev (Yinghai Lu) PCI device hotplug - Major rescan/remove locking update (Rafael J. Wysocki) - Make ioapic builtin only (not modular) (Yinghai Lu) - Fix release/free issues (Yinghai Lu) - Clean up pciehp (Bjorn Helgaas) - Announce pciehp slot info during enumeration (Bjorn Helgaas) MSI - Add pci_msi_vec_count(), pci_msix_vec_count() (Alexander Gordeev) - Add pci_enable_msi_range(), pci_enable_msix_range() (Alexander Gordeev) - Deprecate "tri-state" interfaces: fail/success/fail+info (Alexander Gordeev) - Export MSI mode using attributes, not kobjects (Greg Kroah-Hartman) - Drop "irq" param from *_restore_msi_irqs() (DuanZhenzhong) SR-IOV - Clear NumVFs when disabling SR-IOV in sriov_init() (ethan.zhao) Virtualization - Add support for save/restore of extended capabilities (Alex Williamson) - Add Virtual Channel to save/restore support (Alex Williamson) - Never treat a VF as a multifunction device (Alex Williamson) - Add pci_try_reset_function(), et al (Alex Williamson) AER - Ignore non-PCIe error sources (Betty Dall) - Support ACPI HEST error sources for domains other than 0 (Betty Dall) - Consolidate HEST error source parsers (Bjorn Helgaas) - Add a TLP header print helper (Borislav Petkov) Freescale i.MX6 - Remove unnecessary code (Fabio Estevam) - Make reset-gpio optional (Marek Vasut) - Report "link up" only after link training completes (Marek Vasut) - Start link in Gen1 before negotiating for Gen2 mode (Marek Vasut) - Fix PCIe startup code (Richard Zhu) Marvell MVEBU - Remove duplicate of_clk_get_by_name() call (Andrew Lunn) - Drop writes to bridge Secondary Status register (Jason Gunthorpe) - Obey bridge PCI_COMMAND_MEM and PCI_COMMAND_IO bits (Jason Gunthorpe) - Support a bridge with no IO port window (Jason Gunthorpe) - Use max_t() instead of max(resource_size_t,) (Jingoo Han) - Remove redundant of_match_ptr (Sachin Kamat) - Call pci_ioremap_io() at startup instead of dynamically (Thomas Petazzoni) NVIDIA Tegra - Disable Gen2 for Tegra20 and Tegra30 (Eric Brower) Renesas R-Car - Add runtime PM support (Valentine Barshak) - Fix rcar_pci_probe() return value check (Wei Yongjun) Synopsys DesignWare - Fix crash in dw_msi_teardown_irq() (Bjørn Erik Nilsen) - Remove redundant call to pci_write_config_word() (Bjørn Erik Nilsen) - Fix missing MSI IRQs (Harro Haan) - Add dw_pcie prefix before cfg_read/write (Pratyush Anand) - Fix I/O transfers by using CPU (not realio) address (Pratyush Anand) - Whitespace cleanup (Jingoo Han) EISA - Call put_device() if device_register() fails (Levente Kurusa) - Revert EISA initialization breakage ((Bjorn Helgaas) Miscellaneous - Remove unused code, including PCIe 3.0 interfaces (Stephen Hemminger) - Prevent bus conflicts while checking for bridge apertures (Bjorn Helgaas) - Stop clearing bridge Secondary Status when setting up I/O aperture (Bjorn Helgaas) - Use dev_is_pci() to identify PCI devices (Yijing Wang) - Deprecate DEFINE_PCI_DEVICE_TABLE (Joe Perches) - Update documentation 00-INDEX (Erik Ekman)" * tag 'pci-v3.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (119 commits) Revert "EISA: Initialize device before its resources" Revert "EISA: Log device resources in dmesg" vfio-pci: Use pci "try" reset interface PCI: Check parent kobject in pci_destroy_dev() xen/pcifront: Use global PCI rescan-remove locking powerpc/eeh: Use global PCI rescan-remove locking PCI: Fix pci_check_and_unmask_intx() comment typos PCI: Add pci_try_reset_function(), pci_try_reset_slot(), pci_try_reset_bus() MPT / PCI: Use pci_stop_and_remove_bus_device_locked() platform / x86: Use global PCI rescan-remove locking PCI: hotplug: Use global PCI rescan-remove locking pcmcia: Use global PCI rescan-remove locking ACPI / hotplug / PCI: Use global PCI rescan-remove locking ACPI / PCI: Use global PCI rescan-remove locking in PCI root hotplug PCI: Add global pci_lock_rescan_remove() PCI: Cleanup pci.h whitespace PCI: Reorder so actual code comes before stubs PCI/AER: Support ACPI HEST AER error sources for PCI domains other than 0 ACPICA: Add helper macros to extract bus/segment numbers from HEST table. PCI: Make local functions static ...
2014-01-22s390: wire up sys_sched_setattr/sys_sched_getattrHeiko Carstens
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-22s390/uapi: fix struct statfs64 definitionHeiko Carstens
With b8668fd0a7e1b59f "s390/uapi: change struct statfs[64] member types to unsigned values" the size of a couple of struct statfs64 member got incorrectly changed from 64 to 32 bit for 32 bit builds. Fix this by changing the type of couple of struct statfs64 members from unsigned long to unsigned long long. The definition of struct compat_statfs64 was correct however. Cc: stable@vger.kernel.org # v3.10+ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-22s390/uaccess: remove dead extern declarations, make functions staticHeiko Carstens
Remove some dead uaccess extern declarations and also make some functions static, since they are only used locally. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-22s390/uaccess: test if current->mm is set before walking page tablesHeiko Carstens
If get_fs() == USER_DS we better test if current->mm is not zero before walking page tables. The page table walk code would try to lock mm->page_table_lock, however if mm is zero this might crash. Now it is arguably incorrect trying to access userspace if current->mm is zero, however we have seen that and s390 would be the only architecture which would crash in such a case. So we better make the page table walk code a bit more robust and report always a fault instead. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-22s390/zfcpdump: make zfcpdump depend on 64BITHeiko Carstens
Get rid of this link error: arch/s390/built-in.o: In function `smp_prepare_cpus': (.init.text+0x301e): undefined reference to `dump_save_area_create' Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-01-22s390/32bit: fix cmpxchg64Heiko Carstens
Fix broken inline assembly contraints for cmpxchg64 on 32bit. Fixes this crash: specification exception: 0006 [#1] SMP CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0 #4 task: 005a16c8 ti: 00592000 task.ti: 00592000 Krnl PSW : 070ce000 8029abd6 (lockref_get+0x3e/0x9c) ... Krnl Code: 8029abcc: a71a0001 ahi %r1,1 8029abd0: 1852 lr %r5,%r2 #8029abd2: bb40f064 cds %r4,%r0,100(%r15) >8029abd6: 1943 cr %r4,%r3 8029abd8: 1815 lr %r1,%r5 Call Trace: ([<0000000078e01870>] 0x78e01870) [<000000000021105a>] sysfs_mount+0xd2/0x1c8 [<00000000001b551e>] mount_fs+0x3a/0x134 [<00000000001ce768>] vfs_kern_mount+0x44/0x11c [<00000000001ce864>] kern_mount_data+0x24/0x3c [<00000000005cc4b8>] sysfs_init+0x74/0xd4 [<00000000005cb5b4>] mnt_init+0xe0/0x1fc [<00000000005cb16a>] vfs_caches_init+0xb6/0x14c [<00000000005be794>] start_kernel+0x318/0x33c [<000000000010001c>] _stext+0x1c/0x80 Reported-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-03 06:11:32 +0000