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| author | Benjamin Coddington <bcodding@redhat.com> | 2024-04-17 14:49:29 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2024-05-20 11:12:59 -0400 |
| commit | 37ffe06537af3e3ec212e7cbe941046fce0a822f (patch) | |
| tree | bbf1f423114b7f6096db9292b122eb90afaec9cf | |
| parent | bf95f82e6a569f41bae1e37204b219a5e1e8b971 (diff) | |
| download | linux-37ffe06537af3e3ec212e7cbe941046fce0a822f.tar.gz linux-37ffe06537af3e3ec212e7cbe941046fce0a822f.tar.bz2 linux-37ffe06537af3e3ec212e7cbe941046fce0a822f.zip | |
NFSv4: Fixup smatch warning for ambiguous return
Dan Carpenter reports smatch warning for nfs4_try_migration() when a memory
allocation failure results in a zero return value. In this case, a
transient allocation failure error will likely be retried the next time the
server responds with NFS4ERR_MOVED.
We can fixup the smatch warning with a small refactor: attempt all three
allocations before testing and returning on a failure.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Fixes: c3ed222745d9 ("NFSv4: Fix free of uninitialized nfs4_label on referral lookup.")
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
| -rw-r--r-- | fs/nfs/nfs4state.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c index 662e86ea3a2d..5b452411e8fd 100644 --- a/fs/nfs/nfs4state.c +++ b/fs/nfs/nfs4state.c @@ -2116,6 +2116,7 @@ static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred { struct nfs_client *clp = server->nfs_client; struct nfs4_fs_locations *locations = NULL; + struct nfs_fattr *fattr; struct inode *inode; struct page *page; int status, result; @@ -2125,19 +2126,16 @@ static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred (unsigned long long)server->fsid.minor, clp->cl_hostname); - result = 0; page = alloc_page(GFP_KERNEL); locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); - if (page == NULL || locations == NULL) { - dprintk("<-- %s: no memory\n", __func__); - goto out; - } - locations->fattr = nfs_alloc_fattr(); - if (locations->fattr == NULL) { + fattr = nfs_alloc_fattr(); + if (page == NULL || locations == NULL || fattr == NULL) { dprintk("<-- %s: no memory\n", __func__); + result = 0; goto out; } + locations->fattr = fattr; inode = d_inode(server->super->s_root); result = nfs4_proc_get_locations(server, NFS_FH(inode), locations, page, cred); |