| commit | d988ff94c1074c4c914235c8591bcceafb585ecf | |
| author | Steven Rostedt <srostedt@redhat.com> | |
| Fri, 8 May 2009 15:03:57 +0000 (8 11:03 -0400) | ||
| committer | Steven Rostedt <rostedt@goodmis.org> | |
| Mon, 11 May 2009 17:22:26 +0000 (11 13:22 -0400) | ||
| tree | 46dc84aa84e04ae92cd66ed5cbf7a55452dcdb1c | treesnapshot (tar.gz zip) |
| parent | 5a772b2b3c68e7e0b503c5a48469113bb0634314 | commitdiff |
ring-buffer: check for divide by zero in ring-buffer-benchmark
Although we check if "missed" is not zero, we divide by hit + missed,
and the addition can possible overflow and become a divide by zero.
This patch checks for this case, and will report it when it happens
then modify "hit" to make the calculation be non zero.
[ Impact: prevent possible divide by zero in ring-buffer-benchmark ]
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Although we check if "missed" is not zero, we divide by hit + missed,
and the addition can possible overflow and become a divide by zero.
This patch checks for this case, and will report it when it happens
then modify "hit" to make the calculation be non zero.
[ Impact: prevent possible divide by zero in ring-buffer-benchmark ]
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| kernel/trace/ring_buffer_benchmark.c | diffblobblamehistory |