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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2014-01-21 10:22:09 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2014-01-25 08:50:09 +0100 |
| commit | 2993ae3305ad10b41e0d0bc2662f7754ee8e30fa (patch) | |
| tree | a3ff55895017b1511896f6744e905311c1453f59 | |
| parent | fb53a1ab88d14848dc292842e35c3bda3a665997 (diff) | |
| download | linux-2993ae3305ad10b41e0d0bc2662f7754ee8e30fa.tar.bz2 | |
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>
| -rw-r--r-- | arch/x86/include/asm/amd_nb.h | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/amd_nb.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h index a54ee1d054d9..aaac3b2fb746 100644 --- a/arch/x86/include/asm/amd_nb.h +++ b/arch/x86/include/asm/amd_nb.h @@ -19,7 +19,7 @@ extern int amd_cache_northbridges(void); extern void amd_flush_garts(void); extern int amd_numa_init(void); extern int amd_get_subcaches(int); -extern int amd_set_subcaches(int, int); +extern int amd_set_subcaches(int, unsigned long); struct amd_l3_cache { unsigned indices; 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)); |