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| author | Hao Zeng <zenghao@kylinos.cn> | 2023-04-26 09:05:27 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-05-24 17:32:41 +0100 |
| commit | 895130e63c93926f07caf5db286b97bd27b81de9 (patch) | |
| tree | 5cae8b3dc34a95693109b8cdc759e1139d67e2a2 /scripts/recordmcount.c | |
| parent | 4e2df9111887c6147d596549b83801f5b4309112 (diff) | |
| download | linux-stable-895130e63c93926f07caf5db286b97bd27b81de9.tar.gz linux-stable-895130e63c93926f07caf5db286b97bd27b81de9.tar.bz2 linux-stable-895130e63c93926f07caf5db286b97bd27b81de9.zip | |
recordmcount: Fix memory leaks in the uwrite function
[ Upstream commit fa359d068574d29e7d2f0fdd0ebe4c6a12b5cfb9 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/recordmcount.c')
| -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 cce12e1971d8..ec692af8ce9e 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -102,6 +102,7 @@ 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; @@ -109,7 +110,10 @@ 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) { |