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authorDaniel Micay <danielmicay@gmail.com>2017-05-04 09:32:09 -0400
committerSasha Levin <alexander.levin@verizon.com>2017-07-26 19:25:36 -0400
commit6e359bbd0fe86968d35909723bd7e1fe0567e2bc (patch)
treea139d1a43985c2b34af8ca21d3608de611945ba2 /kernel
parentf9cad1f8d13fe0d161c2a6b61d36525ba72368ca (diff)
stackprotector: Increase the per-task stack canary's random range from 32 bits to 64 bits on 64-bit platforms
[ Upstream commit 5ea30e4e58040cfd6434c2f33dc3ea76e2c15b05 ] The stack canary is an 'unsigned long' and should be fully initialized to random data rather than only 32 bits of random data. Signed-off-by: Daniel Micay <danielmicay@gmail.com> Acked-by: Arjan van de Ven <arjan@linux.intel.com> Acked-by: Rik van Riel <riel@redhat.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: Arjan van Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: kernel-hardening@lists.openwall.com Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20170504133209.3053-1-danielmicay@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/fork.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/fork.c b/kernel/fork.c
index 8209fa2d36ef..edc1916e89ee 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -361,7 +361,7 @@ static struct task_struct *dup_task_struct(struct task_struct *orig)
set_task_stack_end_magic(tsk);
#ifdef CONFIG_CC_STACKPROTECTOR
- tsk->stack_canary = get_random_int();
+ tsk->stack_canary = get_random_long();
#endif
/*