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| author | Su Hui <suhui@nfschina.com> | 2023-08-04 03:26:57 +0200 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2023-08-29 23:45:22 +0200 |
| commit | de8d38cf44bac43e83bad28357ba84784c412752 (patch) | |
| tree | 28292a08f7fbf7f61f57e8eb93afc54a4ab85c91 /fs/lockd | |
| parent | exportfs: remove kernel-doc warnings in exportfs (diff) | |
| download | linux-de8d38cf44bac43e83bad28357ba84784c412752.tar.xz linux-de8d38cf44bac43e83bad28357ba84784c412752.zip | |
fs: lockd: avoid possible wrong NULL parameter
clang's static analysis warning: fs/lockd/mon.c: line 293, column 2:
Null pointer passed as 2nd argument to memory copy function.
Assuming 'hostname' is NULL and calling 'nsm_create_handle()', this will
pass NULL as 2nd argument to memory copy function 'memcpy()'. So return
NULL if 'hostname' is invalid.
Fixes: 77a3ef33e2de ("NSM: More clean up of nsm_get_handle()")
Signed-off-by: Su Hui <suhui@nfschina.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/lockd')
| -rw-r--r-- | fs/lockd/mon.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c index 1d9488cf0534..87a0f207df0b 100644 --- a/fs/lockd/mon.c +++ b/fs/lockd/mon.c @@ -276,6 +276,9 @@ static struct nsm_handle *nsm_create_handle(const struct sockaddr *sap, { struct nsm_handle *new; + if (!hostname) + return NULL; + new = kzalloc(sizeof(*new) + hostname_len + 1, GFP_KERNEL); if (unlikely(new == NULL)) return NULL; |