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NFS: Add missing null check for failed allocation

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Currently the allocation of buf is not being null checked and
a null pointer dereference can occur when the memory allocation fails.
Fix this by adding a check and returning -ENOMEM.

Addresses-Coverity: ("Dereference null return")
Fixes: 6d972518b821 ("NFS: Add fs_context support.")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Colin Ian King 2020-01-06 13:17:34 +00:00 committed by Anna Schumaker
parent 474c4f306e
commit e0b27d98bf
1 changed files with 3 additions and 0 deletions
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3
fs/nfs/nfs4namespace.c
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@ -137,6 +137,9 @@ static int nfs4_validate_fspath(struct dentry *dentry,
int n; int n;
buf = kmalloc(4096, GFP_KERNEL); buf = kmalloc(4096, GFP_KERNEL);
if (!buf)
return -ENOMEM;
path = nfs4_path(dentry, buf, 4096); path = nfs4_path(dentry, buf, 4096);
if (IS_ERR(path)) { if (IS_ERR(path)) {
kfree(buf); kfree(buf);