On Thu, Nov 29, 2012 at 11:43:48AM +0100, Lukas Czerner wrote: > Commit fa77dcfafeaa6bc73293c646bfc3d5192dcf0be2 introduces block bitmap > checksum calculation into ext4_new_inode() in the case that block group > was uninitialized. However we brelse() the bitmap buffer before we > attempt to checksum it so we have no guarantee that the buffer is still > there. > > Fix this by releasing the buffer after the possible checksum > computation. Looks ok, so: Acked-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx> That IBM fellow is gone. ;) --D > > Signed-off-by: Lukas Czerner <lczerner@xxxxxxxxxx> > Cc: Darrick J. Wong <djwong@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > --- > fs/ext4/ialloc.c | 2 +- > 1 files changed, 1 insertions(+), 1 deletions(-) > > diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c > index 3a100e7..c7efa88 100644 > --- a/fs/ext4/ialloc.c > +++ b/fs/ext4/ialloc.c > @@ -762,7 +762,6 @@ got: > > BUFFER_TRACE(block_bitmap_bh, "dirty block bitmap"); > err = ext4_handle_dirty_metadata(handle, NULL, block_bitmap_bh); > - brelse(block_bitmap_bh); > > /* recheck and clear flag under lock if we still need to */ > ext4_lock_group(sb, group); > @@ -775,6 +774,7 @@ got: > ext4_group_desc_csum_set(sb, group, gdp); > } > ext4_unlock_group(sb, group); > + brelse(block_bitmap_bh); > > if (err) > goto fail; > -- > 1.7.7.6 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
