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author | 2019-04-19 21:22:59 -0500 | |
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committer | 2019-04-26 11:45:03 -0400 | |
commit | 91862cc7867bba4ee5c8fcf0ca2f1d30427b6129 (patch) | |
tree | e86c2be2969fddc37d14081504b90df8aab8c145 /include | |
parent | tracing: Fix buffer_ref pipe ops (diff) | |
download | linux-91862cc7867bba4ee5c8fcf0ca2f1d30427b6129.tar.gz linux-91862cc7867bba4ee5c8fcf0ca2f1d30427b6129.tar.bz2 linux-91862cc7867bba4ee5c8fcf0ca2f1d30427b6129.zip |
tracing: Fix a memory leak by early error exit in trace_pid_write()
In trace_pid_write(), the buffer for trace parser is allocated through
kmalloc() in trace_parser_get_init(). Later on, after the buffer is used,
it is then freed through kfree() in trace_parser_put(). However, it is
possible that trace_pid_write() is terminated due to unexpected errors,
e.g., ENOMEM. In that case, the allocated buffer will not be freed, which
is a memory leak bug.
To fix this issue, free the allocated buffer when an error is encountered.
Link: http://lkml.kernel.org/r/1555726979-15633-1-git-send-email-wang6495@umn.edu
Fixes: f4d34a87e9c10 ("tracing: Use pid bitmap instead of a pid array for set_event_pid")
Cc: stable@vger.kernel.org
Signed-off-by: Wenwen Wang <wang6495@umn.edu>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions