================================================================== BUG: KASAN: use-after-free in __list_del_entry_valid+0x88/0x130 lib/list_debug.c:59 Read of size 8 at addr ffff88810c35a498 by task kworker/u4:1/9 CPU: 0 PID: 9 Comm: kworker/u4:1 Not tainted 5.10.161-syzkaller-00019-g416c4356f372 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: writeback wb_workfn (flush-7:0) Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118 print_address_description+0x81/0x3c0 mm/kasan/report.c:233 __kasan_report mm/kasan/report.c:419 [inline] kasan_report+0x1a4/0x1f0 mm/kasan/report.c:436 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309 __list_del_entry_valid+0x88/0x130 lib/list_debug.c:59 __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] __remove_dirty_inode fs/f2fs/checkpoint.c:1015 [inline] f2fs_remove_dirty_inode+0x217/0x3f0 fs/f2fs/checkpoint.c:1051 __f2fs_write_data_pages+0x245b/0x2c80 fs/f2fs/data.c:3219 f2fs_write_data_pages+0x74/0x80 fs/f2fs/data.c:3233 do_writepages+0x13a/0x280 mm/page-writeback.c:2358 __writeback_single_inode+0xb8/0x6e0 fs/fs-writeback.c:1467 writeback_sb_inodes+0x999/0x1700 fs/fs-writeback.c:1730 wb_writeback+0x42f/0xc20 fs/fs-writeback.c:1905 wb_do_writeback+0x222/0xbd0 fs/fs-writeback.c:2050 wb_workfn+0xf8/0x3f0 fs/fs-writeback.c:2091 process_one_work+0x726/0xc10 kernel/workqueue.c:2296 worker_thread+0xb27/0x1550 kernel/workqueue.c:2442 kthread+0x349/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299 Allocated by task 160: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:46 [inline] set_alloc_info mm/kasan/common.c:428 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:507 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:269 [inline] kmem_cache_alloc_trace+0x1dd/0x330 mm/slub.c:2983 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] uevent_show+0x166/0x330 drivers/base/core.c:2277 dev_attr_show+0x56/0xd0 drivers/base/core.c:1984 sysfs_kf_seq_show+0x26b/0x400 fs/sysfs/file.c:61 kernfs_seq_show+0x117/0x160 fs/kernfs/file.c:168 seq_read_iter+0x429/0xd20 fs/seq_file.c:230 kernfs_fop_read_iter+0x161/0x490 fs/kernfs/file.c:241 call_read_iter include/linux/fs.h:1963 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x9e2/0xbf0 fs/read_write.c:496 ksys_read+0x198/0x2c0 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:642 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 Freed by task 160: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:46 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:357 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:360 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:368 kasan_slab_free include/linux/kasan.h:235 [inline] slab_free_hook mm/slub.c:1604 [inline] slab_free_freelist_hook+0xcc/0x1a0 mm/slub.c:1630 slab_free mm/slub.c:3212 [inline] kfree+0xc3/0x290 mm/slub.c:4200 uevent_show+0x1dc/0x330 drivers/base/core.c:2290 dev_attr_show+0x56/0xd0 drivers/base/core.c:1984 sysfs_kf_seq_show+0x26b/0x400 fs/sysfs/file.c:61 kernfs_seq_show+0x117/0x160 fs/kernfs/file.c:168 seq_read_iter+0x429/0xd20 fs/seq_file.c:230 kernfs_fop_read_iter+0x161/0x490 fs/kernfs/file.c:241 call_read_iter include/linux/fs.h:1963 [inline] new_sync_read fs/read_write.c:415 [inline] vfs_read+0x9e2/0xbf0 fs/read_write.c:496 ksys_read+0x198/0x2c0 fs/read_write.c:634 __do_sys_read fs/read_write.c:644 [inline] __se_sys_read fs/read_write.c:642 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:642 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 The buggy address belongs to the object at ffff88810c35a000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 1176 bytes inside of 4096-byte region [ffff88810c35a000, ffff88810c35b000) The buggy address belongs to the page: page:ffffea000430d600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10c358 head:ffffea000430d600 order:3 compound_mapcount:0 compound_pincount:0 flags: 0x8000000000010200(slab|head) raw: 8000000000010200 ffffea0004309400 0000000300000003 ffff888100042c00 raw: 0000000000000000 0000000000040004 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 160, ts 655275465318, free_ts 655173665067 set_page_owner include/linux/page_owner.h:35 [inline] post_alloc_hook mm/page_alloc.c:2386 [inline] prep_new_page mm/page_alloc.c:2392 [inline] get_page_from_freelist+0x755/0x810 mm/page_alloc.c:4073 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5160 alloc_slab_page mm/slub.c:1815 [inline] allocate_slab+0x78/0x540 mm/slub.c:1817 new_slab mm/slub.c:1878 [inline] new_slab_objects mm/slub.c:2636 [inline] ___slab_alloc+0x131/0x2e0 mm/slub.c:2800 __slab_alloc+0x63/0xa0 mm/slub.c:2840 slab_alloc_node mm/slub.c:2922 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc_trace+0x20e/0x330 mm/slub.c:2981 kmalloc include/linux/slab.h:552 [inline] kzalloc include/linux/slab.h:664 [inline] kernfs_iop_get_link+0x65/0x590 fs/kernfs/symlink.c:135 vfs_readlink+0x177/0x420 fs/namei.c:4631 do_readlinkat+0x28f/0x3b0 fs/stat.c:426 __do_sys_readlink fs/stat.c:447 [inline] __se_sys_readlink fs/stat.c:444 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:444 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xc6 page last free stack trace: reset_page_owner include/linux/page_owner.h:28 [inline] free_pages_prepare mm/page_alloc.c:1332 [inline] __free_pages_ok+0x7f8/0x830 mm/page_alloc.c:1612 free_the_page mm/page_alloc.c:5221 [inline] __free_pages+0x383/0x570 mm/page_alloc.c:5228 __free_slab+0xd3/0x190 mm/slub.c:1903 free_slab mm/slub.c:1918 [inline] discard_slab mm/slub.c:1924 [inline] unfreeze_partials+0x17d/0x1b0 mm/slub.c:2419 put_cpu_partial+0xc8/0x190 mm/slub.c:2455 __slab_free+0x2d8/0x3a0 mm/slub.c:3104 do_slab_free mm/slub.c:3200 [inline] ___cache_free+0x11f/0x140 mm/slub.c:3219 qlink_free+0x38/0x40 mm/kasan/quarantine.c:146 qlist_free_all+0x4c/0xc0 mm/kasan/quarantine.c:165 kasan_quarantine_reduce+0x15a/0x170 mm/kasan/quarantine.c:272 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:438 kasan_slab_alloc include/linux/kasan.h:259 [inline] slab_post_alloc_hook include/../mm/slab.h:583 [inline] slab_alloc_node mm/slub.c:2956 [inline] slab_alloc mm/slub.c:2964 [inline] kmem_cache_alloc+0x16c/0x300 mm/slub.c:2969 __d_alloc+0x2d/0x6b0 fs/dcache.c:1709 d_alloc fs/dcache.c:1788 [inline] d_alloc_parallel+0xe6/0x1330 fs/dcache.c:2540 __lookup_slow+0x14e/0x400 fs/namei.c:1615 lookup_slow fs/namei.c:1647 [inline] lookup_one_len_unlocked+0x458/0x680 fs/namei.c:2673 Memory state around the buggy address: ffff88810c35a380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810c35a400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88810c35a480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88810c35a500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88810c35a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ================================================================== list_del corruption. prev->next should be ffff88811a223720, but was 0000000000000000 ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:61! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9 Comm: kworker/u4:1 Tainted: G B 5.10.161-syzkaller-00019-g416c4356f372 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Workqueue: writeback wb_workfn (flush-7:0) RIP: 0010:__list_del_entry_valid+0x11a/0x130 lib/list_debug.c:59 Code: 69 fd 41 02 0f 0b 48 c7 c7 40 0b 44 85 4c 89 f6 31 c0 e8 56 fd 41 02 0f 0b 48 c7 c7 a0 0b 44 85 4c 89 f6 31 c0 e8 43 fd 41 02 <0f> 0b 48 c7 c7 00 0c 44 85 4c 89 f6 31 c0 e8 30 fd 41 02 0f 0b 90 RSP: 0018:ffffc90000097008 EFLAGS: 00010246 RAX: 0000000000000054 RBX: ffff88810c35a498 RCX: a22677a9736aaa00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000097028 R08: ffffffff81540db8 R09: ffffed103ee0a5e8 R10: ffffed103ee0a5e8 R11: 1ffff1103ee0a5e7 R12: dffffc0000000000 R13: ffff88811a223720 R14: ffff88811a223720 R15: ffff88810c35a498 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa5547f0a88 CR3: 000000010da56000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:132 [inline] list_del_init include/linux/list.h:204 [inline] __remove_dirty_inode fs/f2fs/checkpoint.c:1015 [inline] f2fs_remove_dirty_inode+0x217/0x3f0 fs/f2fs/checkpoint.c:1051 __f2fs_write_data_pages+0x245b/0x2c80 fs/f2fs/data.c:3219 f2fs_write_data_pages+0x74/0x80 fs/f2fs/data.c:3233 do_writepages+0x13a/0x280 mm/page-writeback.c:2358 __writeback_single_inode+0xb8/0x6e0 fs/fs-writeback.c:1467 writeback_sb_inodes+0x999/0x1700 fs/fs-writeback.c:1730 wb_writeback+0x42f/0xc20 fs/fs-writeback.c:1905 wb_do_writeback+0x222/0xbd0 fs/fs-writeback.c:2050 wb_workfn+0xf8/0x3f0 fs/fs-writeback.c:2091 process_one_work+0x726/0xc10 kernel/workqueue.c:2296 worker_thread+0xb27/0x1550 kernel/workqueue.c:2442 kthread+0x349/0x3d0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299 Modules linked in: ---[ end trace 63ef9a687ec438b8 ]--- RIP: 0010:__list_del_entry_valid+0x11a/0x130 lib/list_debug.c:59 Code: 69 fd 41 02 0f 0b 48 c7 c7 40 0b 44 85 4c 89 f6 31 c0 e8 56 fd 41 02 0f 0b 48 c7 c7 a0 0b 44 85 4c 89 f6 31 c0 e8 43 fd 41 02 <0f> 0b 48 c7 c7 00 0c 44 85 4c 89 f6 31 c0 e8 30 fd 41 02 0f 0b 90 RSP: 0018:ffffc90000097008 EFLAGS: 00010246 RAX: 0000000000000054 RBX: ffff88810c35a498 RCX: a22677a9736aaa00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90000097028 R08: ffffffff81540db8 R09: ffffed103ee0a5e8 R10: ffffed103ee0a5e8 R11: 1ffff1103ee0a5e7 R12: dffffc0000000000 R13: ffff88811a223720 R14: ffff88811a223720 R15: ffff88810c35a498 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa5547f0a88 CR3: 000000010da56000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400