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authorKalesh Singh <kaleshsingh@google.com>2021-10-13 21:52:17 -0700
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2021-10-19 20:33:20 -0400
commit7ce1bb83a14019f8c396d57ec704d19478747716 (patch)
tree65a4bf69b390fa68576a8afd0102e2ecf0596c62 /include/linux/trace_recursion.h
parent34cdd18b8d245f3e901e5325313c27de727ab80d (diff)
tracing/cfi: Fix cmp_entries_* functions signature mismatch
If CONFIG_CFI_CLANG=y, attempting to read an event histogram will cause the kernel to panic due to failed CFI check. 1. echo 'hist:keys=common_pid' >> events/sched/sched_switch/trigger 2. cat events/sched/sched_switch/hist 3. kernel panics on attempting to read hist This happens because the sort() function expects a generic int (*)(const void *, const void *) pointer for the compare function. To prevent this CFI failure, change tracing map cmp_entries_* function signatures to match this. Also, fix the build error reported by the kernel test robot [1]. [1] https://lore.kernel.org/r/202110141140.zzi4dRh4-lkp@intel.com/ Link: https://lkml.kernel.org/r/20211014045217.3265162-1-kaleshsingh@google.com Signed-off-by: Kalesh Singh <kaleshsingh@google.com> Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/linux/trace_recursion.h')
0 files changed, 0 insertions, 0 deletions