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If the attribute fork on an inode is in btree format and has multiple levels (i.e node format rather than leaf format), then a lookup failure will trigger an assert failure in xfs_da_path_shift if the flag XFS_DA_OP_OKNOENT is not set. This flag is used to indicate to the directory btree code that not finding an entry is not a fatal error. In the case of doing a lookup for a directory name removal, this is valid as a user cannot insert an arbitrary name to remove from the directory btree. However, in the case of the attribute tree, a user has direct control over the attribute name and can ask for any random name to be removed without any validation. In this case, fsstress is asking for a non-existent user.selinux attribute to be removed, and that is causing xfs_da_path_shift() to fall off the bottom of the tree where it asserts that a lookup failure is allowed. Because the flag is not set, we die a horrible death on a debug enable kernel. Prevent this assert from firing on attribute removes by adding the op_flag XFS_DA_OP_OKNOENT to atribute removal operations. Discovered when testing on a SELinux enabled system by fsstress in test 070 by trying to remove a non-existent user.selinux attribute. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com> |
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| .. | ||
| linux-2.6 | ||
| quota | ||
| support | ||
| Kconfig | ||
| Makefile | ||
| xfs_acl.h | ||
| xfs_ag.h | ||
| xfs_alloc_btree.c | ||
| xfs_alloc_btree.h | ||
| xfs_alloc.c | ||
| xfs_alloc.h | ||
| xfs_arch.h | ||
| xfs_attr_leaf.c | ||
| xfs_attr_leaf.h | ||
| xfs_attr_sf.h | ||
| xfs_attr.c | ||
| xfs_attr.h | ||
| xfs_bit.c | ||
| xfs_bit.h | ||
| xfs_bmap_btree.c | ||
| xfs_bmap_btree.h | ||
| xfs_bmap.c | ||
| xfs_bmap.h | ||
| xfs_btree_trace.c | ||
| xfs_btree_trace.h | ||
| xfs_btree.c | ||
| xfs_btree.h | ||
| xfs_buf_item.c | ||
| xfs_buf_item.h | ||
| xfs_da_btree.c | ||
| xfs_da_btree.h | ||
| xfs_dfrag.c | ||
| xfs_dfrag.h | ||
| xfs_dinode.h | ||
| xfs_dir2_block.c | ||
| xfs_dir2_block.h | ||
| xfs_dir2_data.c | ||
| xfs_dir2_data.h | ||
| xfs_dir2_leaf.c | ||
| xfs_dir2_leaf.h | ||
| xfs_dir2_node.c | ||
| xfs_dir2_node.h | ||
| xfs_dir2_sf.c | ||
| xfs_dir2_sf.h | ||
| xfs_dir2.c | ||
| xfs_dir2.h | ||
| xfs_error.c | ||
| xfs_error.h | ||
| xfs_extfree_item.c | ||
| xfs_extfree_item.h | ||
| xfs_filestream.c | ||
| xfs_filestream.h | ||
| xfs_fs.h | ||
| xfs_fsops.c | ||
| xfs_fsops.h | ||
| xfs_ialloc_btree.c | ||
| xfs_ialloc_btree.h | ||
| xfs_ialloc.c | ||
| xfs_ialloc.h | ||
| xfs_iget.c | ||
| xfs_inode_item.c | ||
| xfs_inode_item.h | ||
| xfs_inode.c | ||
| xfs_inode.h | ||
| xfs_inum.h | ||
| xfs_iomap.c | ||
| xfs_iomap.h | ||
| xfs_itable.c | ||
| xfs_itable.h | ||
| xfs_log_cil.c | ||
| xfs_log_priv.h | ||
| xfs_log_recover.c | ||
| xfs_log_recover.h | ||
| xfs_log.c | ||
| xfs_log.h | ||
| xfs_mount.c | ||
| xfs_mount.h | ||
| xfs_mru_cache.c | ||
| xfs_mru_cache.h | ||
| xfs_quota.h | ||
| xfs_rename.c | ||
| xfs_rtalloc.c | ||
| xfs_rtalloc.h | ||
| xfs_rw.c | ||
| xfs_rw.h | ||
| xfs_sb.h | ||
| xfs_trans_ail.c | ||
| xfs_trans_buf.c | ||
| xfs_trans_extfree.c | ||
| xfs_trans_inode.c | ||
| xfs_trans_priv.h | ||
| xfs_trans_space.h | ||
| xfs_trans.c | ||
| xfs_trans.h | ||
| xfs_types.h | ||
| xfs_utils.c | ||
| xfs_utils.h | ||
| xfs_vnodeops.c | ||
| xfs_vnodeops.h | ||
| xfs.h | ||