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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2014-02-14 12:05:49 +0300 |
|---|---|---|
| committer |   Steven Whitehouse <swhiteho@redhat.com> | 2014-02-25 10:01:09 +0000 |
| commit | 47ba9734403770a4c5e685b01f0a72b835dd4fff (patch) | |
| tree | ac4badd94ef5153496a4159e1bc6614333771d90 /fs/posix_acl.c | |
| parent | GFS2: Move log buffer accounting to transaction (diff) | |
| download | wireguard-linux-47ba9734403770a4c5e685b01f0a72b835dd4fff.tar.xz wireguard-linux-47ba9734403770a4c5e685b01f0a72b835dd4fff.zip | |
fs: NULL dereference in posix_acl_to_xattr()
This patch moves the dereference of "buffer" after the check for NULL.
The only place which passes a NULL parameter is gfs2_set_acl().
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/posix_acl.c')
| -rw-r--r-- | fs/posix_acl.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/posix_acl.c b/fs/posix_acl.c index 38bae5a0ea25..202b84fd3310 100644 --- a/fs/posix_acl.c +++ b/fs/posix_acl.c @@ -717,7 +717,7 @@ posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl, void *buffer, size_t size) { posix_acl_xattr_header *ext_acl = (posix_acl_xattr_header *)buffer; - posix_acl_xattr_entry *ext_entry = ext_acl->a_entries; + posix_acl_xattr_entry *ext_entry; int real_size, n; real_size = posix_acl_xattr_size(acl->a_count); @@ -725,7 +725,8 @@ posix_acl_to_xattr(struct user_namespace *user_ns, const struct posix_acl *acl, return real_size; if (real_size > size) return -ERANGE; - + + ext_entry = ext_acl->a_entries; ext_acl->a_version = cpu_to_le32(POSIX_ACL_XATTR_VERSION); for (n=0; n < acl->a_count; n++, ext_entry++) { |