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| author | Nikolay Kuratov <[email protected]> | 2025-02-06 09:01:56 +0000 |
|---|---|---|
| committer | Steven Rostedt (Google) <[email protected]> | 2025-02-28 02:02:10 +0000 |
| commit | a1a7eb89ca0b89dc1c326eeee2596f263291aca3 (patch) | |
| tree | c3d82cacbf3905be9040e9816c91e72ba8299570 /net/unix/sysctl_net_unix.c | |
| parent | selftests/ftrace: Let fprobe test consider already enabled functions (diff) | |
| download | kernel-a1a7eb89ca0b89dc1c326eeee2596f263291aca3.tar.gz kernel-a1a7eb89ca0b89dc1c326eeee2596f263291aca3.zip | |
ftrace: Avoid potential division by zero in function_stat_show()
Check whether denominator expression x * (x - 1) * 1000 mod {2^32, 2^64}
produce zero and skip stddev computation in that case.
For now don't care about rec->counter * rec->counter overflow because
rec->time * rec->time overflow will likely happen earlier.
Cc: [email protected]
Cc: Wen Yang <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: Mathieu Desnoyers <[email protected]>
Link: https://lore.kernel.org/[email protected]
Fixes: e31f7939c1c27 ("ftrace: Avoid potential division by zero in function profiler")
Signed-off-by: Nikolay Kuratov <[email protected]>
Signed-off-by: Steven Rostedt (Google) <[email protected]>
Diffstat (limited to 'net/unix/sysctl_net_unix.c')
0 files changed, 0 insertions, 0 deletions