diff options
| author | Andrew F. Davis <[email protected]> | 2019-05-16 09:34:31 -0500 |
|---|---|---|
| committer | Tom Rini <[email protected]> | 2019-05-28 13:57:52 -0400 |
| commit | d0cd30eb8137c0f14034aeb22c9f00cd70ccc98c (patch) | |
| tree | 578f8d0eb912a6adc8b64b92640c60853c384738 | |
| parent | 7b437807ee0a051f46d329e868e0295299026b75 (diff) | |
fs: fat: Fix possible double free of fatbuf
fat_itr_root() allocates fatbuf so we free it on the exit path, if
the function fails we should not free it, check the return value
and skip freeing if the function fails.
Signed-off-by: Andrew F. Davis <[email protected]>
| -rw-r--r-- | fs/fat/fat.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/fat/fat.c b/fs/fat/fat.c index c5997c21735..06c8ed14bda 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -1134,11 +1134,12 @@ int fat_size(const char *filename, loff_t *size) * expected to fail if passed a directory path: */ free(fsdata.fatbuf); - fat_itr_root(itr, &fsdata); - if (!fat_itr_resolve(itr, filename, TYPE_DIR)) { + ret = fat_itr_root(itr, &fsdata); + if (ret) + goto out_free_itr; + ret = fat_itr_resolve(itr, filename, TYPE_DIR); + if (!ret) *size = 0; - ret = 0; - } goto out_free_both; } |