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authorDan Carpenter <dan.carpenter@oracle.com>2014-01-21 10:22:09 +0300
committerIngo Molnar <mingo@kernel.org>2014-01-25 08:50:09 +0100
commit2993ae3305ad10b41e0d0bc2662f7754ee8e30fa (patch)
treea3ff55895017b1511896f6744e905311c1453f59 /arch/x86/kernel/amd_nb.c
parentfb53a1ab88d14848dc292842e35c3bda3a665997 (diff)
x86/AMD/NB: Fix amd_set_subcaches() parameter type
This is under CAP_SYS_ADMIN, but Smatch complains that mask comes from the user and the test for "mask > 0xf" can underflow. The fix is simple: amd_set_subcaches() should hand down not an 'int' but an 'unsigned long' like it was originally indended to do. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: Daniel J Blueman <daniel@numascale-asia.com> Link: http://lkml.kernel.org/r/20140121072209.GA22095@elgon.mountain Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/amd_nb.c')
-rw-r--r--arch/x86/kernel/amd_nb.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/amd_nb.c b/arch/x86/kernel/amd_nb.c
index 59554dca96ec..dec8de4e1663 100644
--- a/arch/x86/kernel/amd_nb.c
+++ b/arch/x86/kernel/amd_nb.c
@@ -179,7 +179,7 @@ int amd_get_subcaches(int cpu)
return (mask >> (4 * cuid)) & 0xf;
}
-int amd_set_subcaches(int cpu, int mask)
+int amd_set_subcaches(int cpu, unsigned long mask)
{
static unsigned int reset, ban;
struct amd_northbridge *nb = node_to_amd_nb(amd_get_nb_id(cpu));