4.14-stable review patch. If anyone has any objections, please let me know.
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From: Omar Sandoval osandov@fb.com
[ Upstream commit 0552210997badb6a60740a26ff9d976a416510f0 ]
btrfs_free_extent() can fail because of ENOMEM. There's no reason to panic here, we can just abort the transaction.
Fixes: f4b9aa8d3b87 ("btrfs_truncate") Reviewed-by: Nikolay Borisov nborisov@suse.com Signed-off-by: Omar Sandoval osandov@fb.com Reviewed-by: David Sterba dsterba@suse.com Signed-off-by: David Sterba dsterba@suse.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- fs/btrfs/inode.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
--- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -4740,7 +4740,10 @@ delete: extent_num_bytes, 0, btrfs_header_owner(leaf), ino, extent_offset); - BUG_ON(ret); + if (ret) { + btrfs_abort_transaction(trans, ret); + break; + } if (btrfs_should_throttle_delayed_refs(trans, fs_info)) btrfs_async_run_delayed_refs(fs_info, trans->delayed_ref_updates * 2,