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| author | Chris Mason <chris.mason@oracle.com> | 2010-01-17 20:36:18 -0500 |
|---|---|---|
| committer | Chris Mason <chris.mason@oracle.com> | 2010-01-17 20:40:22 -0500 |
| commit | a9cc71a60c29a09174bee2fcef8f924c529fd4b7 (patch) | |
| tree | d8ae909f351fda769f21ad58ce9fbe211657ecf2 /fs/btrfs/acl.c | |
| parent | 6c090a11e1c403b727a6a8eff0b97d5fb9e95cb5 (diff) | |
| download | linux-a9cc71a60c29a09174bee2fcef8f924c529fd4b7.tar.gz linux-a9cc71a60c29a09174bee2fcef8f924c529fd4b7.tar.bz2 linux-a9cc71a60c29a09174bee2fcef8f924c529fd4b7.zip | |
Btrfs: deal with NULL acl sent to btrfs_set_acl
It is legal for btrfs_set_acl to be sent a NULL acl. This
makes sure we don't dereference it. A similar patch was sent by
Johannes Hirte <johannes.hirte@fem.tu-ilmenau.de>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/acl.c')
| -rw-r--r-- | fs/btrfs/acl.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c index 1898f8555f06..fa44e92e9b8f 100644 --- a/fs/btrfs/acl.c +++ b/fs/btrfs/acl.c @@ -112,12 +112,14 @@ static int btrfs_set_acl(struct btrfs_trans_handle *trans, switch (type) { case ACL_TYPE_ACCESS: mode = inode->i_mode; - ret = posix_acl_equiv_mode(acl, &mode); - if (ret < 0) - return ret; - ret = 0; - inode->i_mode = mode; name = POSIX_ACL_XATTR_ACCESS; + if (acl) { + ret = posix_acl_equiv_mode(acl, &mode); + if (ret < 0) + return ret; + inode->i_mode = mode; + } + ret = 0; break; case ACL_TYPE_DEFAULT: if (!S_ISDIR(inode->i_mode)) |