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authorLiu Bo <bo.li.liu@oracle.com>2016-06-06 12:01:23 -0700
committerDavid Sterba <dsterba@suse.com>2016-06-17 18:32:40 +0200
commitc871b0f2fd27e7f9097d507f47de5270f88003b9 (patch)
tree76635b17aa4948c8a8af7f9da1a3a8225ac2d518 /fs/btrfs/ctree.c
parent16ff4b454f1b56e8d89a9075feed0dd6ac510c3d (diff)
downloadlinux-c871b0f2fd27e7f9097d507f47de5270f88003b9.tar.bz2
Btrfs: check if extent buffer is aligned to sectorsize
Thanks to fuzz testing, we can pass an invalid bytenr to extent buffer via alloc_extent_buffer(). An unaligned eb can have more pages than it should have, which ends up extent buffer's leak or some corrupted content in extent buffer. This adds a warning to let us quickly know what was happening. Now that alloc_extent_buffer() no more returns NULL, this changes its caller and callers of its caller to match with the new error handling. Signed-off-by: Liu Bo <bo.li.liu@oracle.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/ctree.c')
-rw-r--r--fs/btrfs/ctree.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 46025688f1d0..827c949fa4bc 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2512,6 +2512,8 @@ read_block_for_search(struct btrfs_trans_handle *trans,
if (!btrfs_buffer_uptodate(tmp, 0, 0))
ret = -EIO;
free_extent_buffer(tmp);
+ } else {
+ ret = PTR_ERR(tmp);
}
return ret;
}