aboutsummaryrefslogtreecommitdiffstats
path: root/lib/mpi/mpi-scan.c
diff options
context:
space:
mode:
authorDapeng Mi <[email protected]>2025-10-28 06:42:14 +0000
committerPeter Zijlstra <[email protected]>2025-10-29 09:29:52 +0000
commit0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251 (patch)
tree5a2ca6c4846b33d882f2be813c19bfe86272b0c7 /lib/mpi/mpi-scan.c
parentLinux 6.18-rc3 (diff)
downloadkernel-0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251.tar.gz
kernel-0ba6502ce167fc3d598c08c2cc3b4ed7ca5aa251.zip
perf/x86/intel: Fix KASAN global-out-of-bounds warning
When running "perf mem record" command on CWF, the below KASAN global-out-of-bounds warning is seen. ================================================================== BUG: KASAN: global-out-of-bounds in cmt_latency_data+0x176/0x1b0 Read of size 4 at addr ffffffffb721d000 by task dtlb/9850 Call Trace: kasan_report+0xb8/0xf0 cmt_latency_data+0x176/0x1b0 setup_arch_pebs_sample_data+0xf49/0x2560 intel_pmu_drain_arch_pebs+0x577/0xb00 handle_pmi_common+0x6c4/0xc80 The issue is caused by below code in __grt_latency_data(). The code tries to access x86_hybrid_pmu structure which doesn't exist on non-hybrid platform like CWF. WARN_ON_ONCE(hybrid_pmu(event->pmu)->pmu_type == hybrid_big) So add is_hybrid() check before calling this WARN_ON_ONCE to fix the global-out-of-bounds access issue. Fixes: 090262439f66 ("perf/x86/intel: Rename model-specific pebs_latency_data functions") Reported-by: Xudong Hao <[email protected]> Signed-off-by: Dapeng Mi <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Reviewed-by: Zide Chen <[email protected]> Cc: [email protected] Link: https://patch.msgid.link/[email protected]
Diffstat (limited to 'lib/mpi/mpi-scan.c')
0 files changed, 0 insertions, 0 deletions