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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2020-06-20 12:46:03 +0900 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2020-06-30 15:36:27 -0400 |
| commit | 4e900e335251faae100a155e32da6f4693771f51 (patch) | |
| tree | 65545acd7f4f9b39bbec85a90324cead6b62fb9f /kernel/trace/ring_buffer.c | |
| parent | fd600050bce631e15d4d44893558566135a3460d (diff) | |
| download | linux-stable-4e900e335251faae100a155e32da6f4693771f51.tar.gz linux-stable-4e900e335251faae100a155e32da6f4693771f51.tar.bz2 linux-stable-4e900e335251faae100a155e32da6f4693771f51.zip | |
tracing: Fix event trigger to accept redundant spaces
commit 6784beada631800f2c5afd567e5628c843362cee upstream.
Fix the event trigger to accept redundant spaces in
the trigger input.
For example, these return -EINVAL
echo " traceon" > events/ftrace/print/trigger
echo "traceon if common_pid == 0" > events/ftrace/print/trigger
echo "disable_event:kmem:kmalloc " > events/ftrace/print/trigger
But these are hard to find what is wrong.
To fix this issue, use skip_spaces() to remove spaces
in front of actual tokens, and set NULL if there is no
token.
Link: http://lkml.kernel.org/r/159262476352.185015.5261566783045364186.stgit@devnote2
Cc: Tom Zanussi <zanussi@kernel.org>
Cc: stable@vger.kernel.org
Fixes: 85f2b08268c0 ("tracing: Add basic event trigger framework")
Reviewed-by: Tom Zanussi <zanussi@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/trace/ring_buffer.c')
0 files changed, 0 insertions, 0 deletions