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| author | Peter Zijlstra <[email protected]> | 2021-07-29 11:14:57 +0200 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2021-08-04 15:16:33 +0200 |
| commit | f4b4b45652578357031fbbef7f7a1b04f6fa2dc3 (patch) | |
| tree | 962fc386974a3c2b13c1f0664ad24f3f9f7fc0aa /drivers/fpga/fpga-mgr.c | |
| parent | b068fc04de10fff8974f6ef32b861ad134d94ba4 (diff) | |
perf/x86: Fix out of bound MSR access
On Wed, Jul 28, 2021 at 12:49:43PM -0400, Vince Weaver wrote:
> [32694.087403] unchecked MSR access error: WRMSR to 0x318 (tried to write 0x0000000000000000) at rIP: 0xffffffff8106f854 (native_write_msr+0x4/0x20)
> [32694.101374] Call Trace:
> [32694.103974] perf_clear_dirty_counters+0x86/0x100
The problem being that it doesn't filter out all fake counters, in
specific the above (erroneously) tries to use FIXED_BTS. Limit the
fixed counters indexes to the hardware supplied number.
Reported-by: Vince Weaver <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Tested-by: Vince Weaver <[email protected]>
Tested-by: Like Xu <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-mgr.c')
0 files changed, 0 insertions, 0 deletions