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| author | Hugh Dickins <hughd@google.com> | 2014-07-23 23:00:17 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-07-24 00:10:55 +0200 |
| commit | 4e66d445d0421a159135572a0ba44b75c7c4adfa (patch) | |
| tree | edef8d8ebd021624dd89a0ed5f157d16e1156313 /fs/xattr.c | |
| parent | mm/fs: fix pessimization in hole-punching pagecache (diff) | |
| download | linux-4e66d445d0421a159135572a0ba44b75c7c4adfa.tar.xz linux-4e66d445d0421a159135572a0ba44b75c7c4adfa.zip | |
simple_xattr: permit 0-size extended attributes
If a filesystem uses simple_xattr to support user extended attributes,
LTP setxattr01 and xfstests generic/062 fail with "Cannot allocate
memory": simple_xattr_alloc()'s wrap-around test mistakenly excludes
values of zero size. Fix that off-by-one (but apparently no filesystem
needs them yet).
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jeff Layton <jlayton@poochiereds.net>
Cc: Aristeu Rozanski <aris@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/xattr.c')
| -rw-r--r-- | fs/xattr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/xattr.c b/fs/xattr.c index 3377dff18404..c69e6d43a0d2 100644 --- a/fs/xattr.c +++ b/fs/xattr.c @@ -843,7 +843,7 @@ struct simple_xattr *simple_xattr_alloc(const void *value, size_t size) /* wrap around? */ len = sizeof(*new_xattr) + size; - if (len <= sizeof(*new_xattr)) + if (len < sizeof(*new_xattr)) return NULL; new_xattr = kmalloc(len, GFP_KERNEL); |