RBP: 00007ffd60712320 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffd60713410 R13: 000055556659c700 R14: 0000000000000001 R15: 431bde82d7b634db ---[ end trace 345c9908b4abd990 ]--- ================================================================== BUG: KASAN: use-after-free in __list_add_valid+0x6b/0xf0 lib/list_debug.c:30 Read of size 8 at addr ffff888121431d70 by task syz-executor117/282 CPU: 0 PID: 282 Comm: syz-executor117 Tainted: G W 5.10.238-syzkaller-00282-gd76d4cd0623a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0xe2/0x130 mm/kasan/report.c:452 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __list_add_valid+0x6b/0xf0 lib/list_debug.c:30 __list_add include/linux/list.h:67 [inline] list_add_tail include/linux/list.h:100 [inline] f2fs_inode_dirtied+0x199/0x2a0 fs/f2fs/super.c:1476 f2fs_mark_inode_dirty_sync+0xfa/0x140 fs/f2fs/inode.c:33 f2fs_i_links_write fs/f2fs/f2fs.h:3026 [inline] f2fs_drop_nlink+0x155/0x3c0 fs/f2fs/dir.c:920 f2fs_delete_entry+0x9d5/0xb30 fs/f2fs/dir.c:987 f2fs_unlink+0x422/0x800 fs/f2fs/namei.c:630 vfs_unlink+0x321/0x540 fs/namei.c:3971 do_unlinkat+0x2e9/0x670 fs/namei.c:4036 __do_sys_unlink fs/namei.c:4082 [inline] __se_sys_unlink fs/namei.c:4080 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4080 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f2abdddeb97 Code: 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd60712268 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2abdddeb97 RDX: 00007ffd60712290 RSI: 00007ffd60712320 RDI: 00007ffd60712320 RBP: 00007ffd60712320 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffd60713410 R13: 000055556659c700 R14: 0000000000000001 R15: 431bde82d7b634db Allocated by task 284: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:430 [inline] __kasan_slab_alloc+0xbd/0xf0 mm/kasan/common.c:463 kasan_slab_alloc include/linux/kasan.h:244 [inline] slab_post_alloc_hook+0x5d/0x2f0 mm/slab.h:583 slab_alloc_node mm/slub.c:2947 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2960 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline] f2fs_alloc_inode+0x26/0x410 fs/f2fs/super.c:1373 alloc_inode fs/inode.c:233 [inline] iget_locked+0x146/0x7d0 fs/inode.c:1275 f2fs_iget+0x55/0x4dc0 fs/f2fs/inode.c:498 f2fs_lookup+0x3ee/0xce0 fs/f2fs/namei.c:544 __lookup_slow+0x2aa/0x3e0 fs/namei.c:1640 lookup_slow+0x57/0x70 fs/namei.c:1657 walk_component+0x325/0x460 fs/namei.c:1952 lookup_last fs/namei.c:2403 [inline] path_lookupat+0x180/0x490 fs/namei.c:2427 filename_lookup+0x1d5/0x600 fs/namei.c:2460 user_path_at_empty+0x43/0x50 fs/namei.c:2740 user_path_at include/linux/namei.h:60 [inline] vfs_statx+0xff/0x520 fs/stat.c:193 vfs_fstatat fs/stat.c:215 [inline] vfs_lstat include/linux/fs.h:3304 [inline] __do_sys_newlstat fs/stat.c:369 [inline] __se_sys_newlstat+0xb8/0x320 fs/stat.c:363 __x64_sys_newlstat+0x5b/0x70 fs/stat.c:363 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 19: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4a/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370 kasan_slab_free include/linux/kasan.h:220 [inline] slab_free_hook mm/slub.c:1595 [inline] slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621 slab_free mm/slub.c:3203 [inline] kmem_cache_free+0x100/0x2d0 mm/slub.c:3219 f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1528 i_callback+0x4c/0x70 fs/inode.c:222 rcu_do_batch+0x4df/0xa80 kernel/rcu/tree.c:2494 rcu_core+0x55f/0xd60 kernel/rcu/tree.c:2735 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2748 __do_softirq+0x255/0x563 kernel/softirq.c:309 Last potentially related work creation: kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358 __call_rcu kernel/rcu/tree.c:2976 [inline] call_rcu+0x105/0x1040 kernel/rcu/tree.c:3050 destroy_inode fs/inode.c:288 [inline] evict+0x857/0x910 fs/inode.c:629 iput_final fs/inode.c:1736 [inline] iput+0x638/0x7c0 fs/inode.c:1762 do_unlinkat+0x33f/0x670 fs/namei.c:4042 __do_sys_unlink fs/namei.c:4082 [inline] __se_sys_unlink fs/namei.c:4080 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4080 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff8881214319c0 which belongs to the cache f2fs_inode_cache of size 1520 The buggy address is located 944 bytes inside of 1520-byte region [ffff8881214319c0, ffff888121431fb0) The buggy address belongs to the page: page:ffffea0004850c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x121430 head:ffffea0004850c00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x4000000000010200(slab|head) raw: 4000000000010200 dead000000000100 dead000000000122 ffff8881029d3680 raw: 0000000000000000 0000000080130013 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 284, ts 22967847224, free_ts 0 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2456 [inline] prep_new_page+0x179/0x180 mm/page_alloc.c:2462 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5357 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1808 [inline] new_slab+0x84/0x3f0 mm/slub.c:1869 new_slab_objects mm/slub.c:2627 [inline] ___slab_alloc+0x2a6/0x450 mm/slub.c:2791 __slab_alloc+0x63/0xa0 mm/slub.c:2831 slab_alloc_node mm/slub.c:2913 [inline] slab_alloc mm/slub.c:2955 [inline] kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2960 f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2779 [inline] f2fs_alloc_inode+0x26/0x410 fs/f2fs/super.c:1373 alloc_inode fs/inode.c:233 [inline] iget_locked+0x146/0x7d0 fs/inode.c:1275 f2fs_iget+0x55/0x4dc0 fs/f2fs/inode.c:498 f2fs_fill_super+0x39f0/0x6c70 fs/f2fs/super.c:4193 mount_bdev+0x28b/0x3a0 fs/super.c:1442 f2fs_mount+0x34/0x40 fs/f2fs/super.c:4548 legacy_get_tree+0xed/0x190 fs/fs_context.c:593 vfs_get_tree+0x89/0x260 fs/super.c:1572 do_new_mount+0x25a/0xa20 fs/namespace.c:2915 page_owner free stack trace missing Memory state around the buggy address: ffff888121431c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888121431c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888121431d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888121431d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888121431e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================