diff options
| -rw-r--r-- | fs/ext3/xattr.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c index 387d92d00b97..d7add4ca2e53 100644 --- a/fs/ext3/xattr.c +++ b/fs/ext3/xattr.c @@ -800,8 +800,16 @@ inserted: /* We need to allocate a new block */ ext3_fsblk_t goal = ext3_group_first_block_no(sb, EXT3_I(inode)->i_block_group); - ext3_fsblk_t block = ext3_new_block(handle, inode, - goal, &error); + ext3_fsblk_t block; + + /* + * Protect us agaist concurrent allocations to the + * same inode from ext3_..._writepage(). Reservation + * code does not expect racing allocations. + */ + mutex_lock(&EXT3_I(inode)->truncate_mutex); + block = ext3_new_block(handle, inode, goal, &error); + mutex_unlock(&EXT3_I(inode)->truncate_mutex); if (error) goto cleanup; ea_idebug(inode, "creating block %d", block); |