| commit | 5f16f3225b06242a9ee876f07c1c9b6ed36a22b6 | [log] [tgz] |
|---|---|---|
| author | Theodore Ts'o <tytso@mit.edu> | Mon Mar 24 14:43:12 2014 -0400 |
| committer | Theodore Ts'o <tytso@mit.edu> | Mon Mar 24 14:43:12 2014 -0400 |
| tree | cebecf399c2d9ef5b0a24902638cb37d2e9e092b | |
| parent | ed3654eb981fd44694b4d2a636e13f998bc10e7f [diff] |
ext4: atomically set inode->i_flags in ext4_set_inode_flags() Use cmpxchg() to atomically set i_flags instead of clearing out the S_IMMUTABLE, S_APPEND, etc. flags and then setting them from the EXT4_IMMUTABLE_FL, EXT4_APPEND_FL flags, since this opens up a race where an immutable file has the immutable flag cleared for a brief window of time. Reported-by: John Sullivan <jsrhbz@kanargh.force9.co.uk> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: stable@kernel.org