Kernel/linux-next
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git synced 2025-01-15 11:27:47 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

signal, perf: Add missing TRAP_PERF case in siginfo_layout()

Browse Source 
Add the missing TRAP_PERF case in siginfo_layout() for interpreting the
layout correctly as SIL_PERF_EVENT instead of just SIL_FAULT. This
ensures the si_perf field is copied and not just the si_addr field.

This was caught and tested by running the perf_events/sigtrap_threads
kselftest as a 32-bit binary with a 64-bit kernel.

Fixes: fb6cc127e0b6 ("signal: Introduce TRAP_PERF si_code and si_perf to siginfo")
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210422191823.79012-2-elver@google.com
This commit is contained in:
Marco Elver 2021-04-22 21:18:23 +02:00 committed by Peter Zijlstra
parent 3ddb3fd8cd
commit ed8e50800b
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/signal.c
View File

@ -3206,6 +3206,8 @@ enum siginfo_layout siginfo_layout(unsigned sig, int si_code)
else if ((sig == SIGSEGV) && (si_code == SEGV_PKUERR))
layout = SIL_FAULT_PKUERR;
#endif
else if ((sig == SIGTRAP) && (si_code == TRAP_PERF))
layout = SIL_PERF_EVENT;
}
else if (si_code <= NSIGPOLL)
layout = SIL_POLL;