overlayfs: upper fs needs to support d_type. overlayfs: upper fs does not support tmpfile. overlayfs: upper fs does not support RENAME_WHITEOUT. ================================================================== BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:311 [inline] BUG: KASAN: slab-use-after-free in release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:892 Read of size 8 at addr ffff888000ad3218 by task syz.0.0/5323 CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 drop_metapage fs/jfs/jfs_metapage.c:311 [inline] release_metapage+0x760/0xac0 fs/jfs/jfs_metapage.c:892 write_metapage fs/jfs/jfs_metapage.h:75 [inline] flush_metapage fs/jfs/jfs_metapage.h:81 [inline] ea_put fs/jfs/xattr.c:623 [inline] __jfs_setxattr+0xe37/0x1160 fs/jfs/xattr.c:792 __jfs_xattr_set+0xda/0x170 fs/jfs/xattr.c:941 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x163/0x360 fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:317 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:329 [inline] ovl_init_uuid_xattr+0x59a/0x9a0 fs/overlayfs/util.c:829 ovl_fill_super_creds fs/overlayfs/super.c:1474 [inline] ovl_fill_super+0x3749/0x5e00 fs/overlayfs/super.c:1564 vfs_get_super fs/super.c:1327 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1346 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3839 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4338 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7816b9c799 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7817b07fe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f7816e16090 RCX: 00007f7816b9c799 RDX: 0000200000000000 RSI: 0000200000000040 RDI: 0000000000000000 RBP: 00007f7816c32c99 R08: 0000200000000100 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f7816e16128 R14: 00007f7816e16090 R15: 00007ffc92f95068 Allocated by task 5323: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 unpoison_slab_object mm/kasan/common.c:340 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:4538 [inline] slab_alloc_node mm/slub.c:4866 [inline] kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4873 mempool_alloc_noprof+0x1ce/0x300 mm/mempool.c:566 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline] __get_metapage+0x50c/0xde0 fs/jfs/jfs_metapage.c:760 ea_get+0xb9a/0x1330 fs/jfs/xattr.c:528 __jfs_setxattr+0x5ba/0x1160 fs/jfs/xattr.c:727 __jfs_xattr_set+0xda/0x170 fs/jfs/xattr.c:941 __vfs_setxattr+0x43c/0x480 fs/xattr.c:200 __vfs_setxattr_noperm+0x12d/0x660 fs/xattr.c:234 vfs_setxattr+0x163/0x360 fs/xattr.c:321 ovl_do_setxattr fs/overlayfs/overlayfs.h:317 [inline] ovl_setxattr fs/overlayfs/overlayfs.h:329 [inline] ovl_init_uuid_xattr+0x59a/0x9a0 fs/overlayfs/util.c:829 ovl_fill_super_creds fs/overlayfs/super.c:1474 [inline] ovl_fill_super+0x3749/0x5e00 fs/overlayfs/super.c:1564 vfs_get_super fs/super.c:1327 [inline] get_tree_nodev+0xbb/0x150 fs/super.c:1346 vfs_get_tree+0x92/0x2a0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x341/0xd30 fs/namespace.c:3839 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x31d/0x420 fs/namespace.c:4338 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 76: kasan_save_stack mm/kasan/common.c:57 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:78 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584 poison_slab_object mm/kasan/common.c:253 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:2685 [inline] slab_free mm/slub.c:6165 [inline] kmem_cache_free+0x187/0x630 mm/slub.c:6295 mempool_free+0xec/0x130 mm/mempool.c:711 free_metapage fs/jfs/jfs_metapage.c:279 [inline] metapage_release_folio+0x40e/0x540 fs/jfs/jfs_metapage.c:636 shrink_folio_list+0x2226/0x5290 mm/vmscan.c:1491 evict_folios+0x4795/0x5880 mm/vmscan.c:4718 try_to_shrink_lruvec+0xb62/0xfa0 mm/vmscan.c:4881 shrink_one+0x25c/0x710 mm/vmscan.c:4926 shrink_many mm/vmscan.c:4989 [inline] lru_gen_shrink_node mm/vmscan.c:5067 [inline] shrink_node+0x3197/0x3a90 mm/vmscan.c:6047 kswapd_shrink_node mm/vmscan.c:6894 [inline] balance_pgdat mm/vmscan.c:7070 [inline] kswapd+0x1742/0x2e10 mm/vmscan.c:7343 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 The buggy address belongs to the object at ffff888000ad31f0 which belongs to the cache jfs_mp of size 184 The buggy address is located 40 bytes inside of freed 184-byte region [ffff888000ad31f0, ffff888000ad32a8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xad3 flags: 0x7ff00000000000(node=0|zone=0|lastcpupid=0x7ff) page_type: f5(slab) raw: 007ff00000000000 ffff888000a4cb40 dead000000000122 0000000000000000 raw: 0000000000000000 0000000800100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 8252602795, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889 prep_new_page mm/page_alloc.c:1897 [inline] get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250 alloc_slab_page mm/slub.c:3292 [inline] allocate_slab+0x77/0x660 mm/slub.c:3481 new_slab mm/slub.c:3539 [inline] refill_objects+0x331/0x3c0 mm/slub.c:7175 refill_sheaf mm/slub.c:2812 [inline] alloc_full_sheaf mm/slub.c:2834 [inline] __pcs_replace_empty_main+0x40a/0x730 mm/slub.c:4626 alloc_from_pcs mm/slub.c:4717 [inline] slab_alloc_node mm/slub.c:4851 [inline] kmem_cache_alloc_noprof+0x37d/0x650 mm/slub.c:4873 mempool_init_node+0x1ea/0x4d0 mm/mempool.c:259 mempool_create_node_noprof+0xb8/0x150 mm/mempool.c:323 metapage_init+0xed/0x150 fs/jfs/jfs_metapage.c:292 init_jfs_fs+0xfd/0x4e0 fs/jfs/super.c:968 do_one_initcall+0x250/0x8d0 init/main.c:1382 do_initcall_level+0x104/0x190 init/main.c:1444 do_initcalls+0x59/0xa0 init/main.c:1460 kernel_init_freeable+0x2a6/0x3e0 init/main.c:1692 kernel_init+0x1d/0x1d0 init/main.c:1582 page_owner free stack trace missing Memory state around the buggy address: ffff888000ad3100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888000ad3180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fa fb >ffff888000ad3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888000ad3280: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb ffff888000ad3300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================