diff options
| author | Hao Zeng | 2023-04-26 09:05:27 +0800 |
|---|---|---|
| committer | Steven Rostedt (Google) | 2023-04-25 21:10:20 -0400 |
| commit | fa359d068574d29e7d2f0fdd0ebe4c6a12b5cfb9 (patch) | |
| tree | ea4ce7f88d231cba56a22c894f820e18e9408d2f /scripts | |
| parent | 41d8fba193b36ac1208d8f8489390b93675fab7b (diff) | |
recordmcount: Fix memory leaks in the uwrite function
Common realloc mistake: 'file_append' nulled but not freed upon failure
Link: https://lkml.kernel.org/r/20230426010527.703093-1-zenghao@kylinos.cn
Signed-off-by: Hao Zeng <zenghao@kylinos.cn>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/recordmcount.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index e30216525325..40ae6b2c7a6d 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -110,6 +110,7 @@ static ssize_t uwrite(void const *const buf, size_t const count) { size_t cnt = count; off_t idx = 0; + void *p = NULL; file_updated = 1; @@ -117,7 +118,10 @@ static ssize_t uwrite(void const *const buf, size_t const count) off_t aoffset = (file_ptr + count) - file_end; if (aoffset > file_append_size) { - file_append = realloc(file_append, aoffset); + p = realloc(file_append, aoffset); + if (!p) + free(file_append); + file_append = p; file_append_size = aoffset; } if (!file_append) { |