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| author | Chengguang Xu <cgxu519@gmx.com> | 2018-04-05 16:19:53 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-05 21:36:22 -0700 |
| commit | a25c36577ca788f9ea4b229baef1b6d436393a4c (patch) | |
| tree | 8300b3cc58689b5624da6b25f2bd5ed052a1a71b /fs | |
| parent | ac89b2ef9b55924bcf922251f043ba73a32d05bb (diff) | |
| download | lwn-a25c36577ca788f9ea4b229baef1b6d436393a4c.tar.gz lwn-a25c36577ca788f9ea4b229baef1b6d436393a4c.zip | |
9p: check memory allocation result for cachetag
Check memory allocation result for cachetag in mount option parsing and
fix potential memory leak in the error case.
Link: http://lkml.kernel.org/r/1521614889-73446-1-git-send-email-cgxu519@gmx.com
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Eric Van Hensbergen <ericvh@gmail.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Cc: <v9fs-developer@lists.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/9p/v9fs.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 8fb89ddc6cc7..e622f0f10502 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -292,6 +292,10 @@ static int v9fs_parse_options(struct v9fs_session_info *v9ses, char *opts) #ifdef CONFIG_9P_FSCACHE kfree(v9ses->cachetag); v9ses->cachetag = match_strdup(&args[0]); + if (!v9ses->cachetag) { + ret = -ENOMEM; + goto free_and_return; + } #endif break; case Opt_cache: @@ -471,6 +475,9 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, return fid; err_clnt: +#ifdef CONFIG_9P_FSCACHE + kfree(v9ses->cachetag); +#endif p9_client_destroy(v9ses->clnt); err_names: kfree(v9ses->uname); |