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| author |   Slava Pestov <slavapestov@google.com> | 2010-11-24 15:13:16 -0800 |
|---|---|---|
| committer |   Steven Rostedt <rostedt@goodmis.org> | 2010-11-30 12:18:17 -0500 |
| commit | 364829b1263b44aa60383824e4c1289d83d78ca7 (patch) | |
| tree | daaaf4cecd56ff9f3f9a2eadc69d0cc4f361c607 /tools/perf/scripts/python/syscall-counts.py | |
| parent | perf header: Don't assume there's no attr info if no sample ids is provided (diff) | |
| download | wireguard-linux-364829b1263b44aa60383824e4c1289d83d78ca7.tar.xz wireguard-linux-364829b1263b44aa60383824e4c1289d83d78ca7.zip | |
tracing: Fix panic when lseek() called on "trace" opened for writing
The file_ops struct for the "trace" special file defined llseek as seq_lseek().
However, if the file was opened for writing only, seq_open() was not called,
and the seek would dereference a null pointer, file->private_data.
This patch introduces a new wrapper for seq_lseek() which checks if the file
descriptor is opened for reading first. If not, it does nothing.
Cc: <stable@kernel.org>
Signed-off-by: Slava Pestov <slavapestov@google.com>
LKML-Reference: <1290640396-24179-1-git-send-email-slavapestov@google.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions