RBP: 00007f0d8e6eef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d8e8c1038 R14: 00007f0d8e8c0fa0 R15: 00007ffd111325c8 ---[ end trace ca9834021dcffe63 ]--- ================================================================== BUG: KASAN: use-after-free in fast_dput+0x1e9/0x290 fs/dcache.c:750 Read of size 4 at addr ffff888110409770 by task syz.3.38/476 CPU: 0 PID: 476 Comm: syz.3.38 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308 fast_dput+0x1e9/0x290 fs/dcache.c:750 dput+0x21/0x80 fs/dcache.c:870 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166 incfs_kill_sb+0x1aa/0x210 fs/incfs/vfs.c:1979 deactivate_locked_super+0xa0/0x100 fs/super.c:335 deactivate_super+0xaf/0xe0 fs/super.c:366 cleanup_mnt+0x446/0x500 fs/namespace.c:1123 __cleanup_mnt+0x19/0x20 fs/namespace.c:1130 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa4f/0x2480 kernel/exit.c:872 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0d8e69d005 Code: Unable to access opcode bytes at RIP 0x7f0d8e69cfdb. RSP: 002b:00007f0d8d0d1f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f0d8e8c0fa0 RCX: 00007f0d8e69d005 RDX: 00007f0d8d0d1fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f0d8e6eef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d8e8c1038 R14: 00007f0d8e8c0fa0 R15: 00007ffd111325c8 Allocated by task 475: 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:580 slab_alloc_node mm/slub.c:2952 [inline] slab_alloc mm/slub.c:2960 [inline] kmem_cache_alloc+0x165/0x2e0 mm/slub.c:2965 __d_alloc+0x2d/0x6a0 fs/dcache.c:1714 d_alloc fs/dcache.c:1793 [inline] d_alloc_parallel+0xe1/0x1390 fs/dcache.c:2549 __lookup_slow+0x13e/0x3e0 fs/namei.c:1633 lookup_one_len+0x18e/0x2c0 fs/namei.c:2664 incfs_lookup_dentry+0x60/0xb0 fs/incfs/data_mgmt.c:210 open_or_create_special_dir+0x4f/0x1d0 fs/incfs/vfs.c:469 incfs_mount_fs+0x434/0x8c0 fs/incfs/vfs.c:1867 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:3006 path_mount+0x572/0xc80 fs/namespace.c:3336 do_mount fs/namespace.c:3349 [inline] __do_sys_mount fs/namespace.c:3557 [inline] __se_sys_mount+0x318/0x380 fs/namespace.c:3534 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3534 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 276: 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:1600 [inline] slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1626 slab_free mm/slub.c:3208 [inline] kmem_cache_free+0x100/0x2d0 mm/slub.c:3224 __d_free+0x23/0x30 fs/dcache.c:271 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:2980 [inline] call_rcu+0x10e/0x1050 kernel/rcu/tree.c:3054 dentry_free+0xbd/0x150 fs/dcache.c:-1 __dentry_kill+0x50a/0x650 fs/dcache.c:597 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x42/0x80 fs/dcache.c:883 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166 incfs_kill_sb+0x1aa/0x210 fs/incfs/vfs.c:1979 deactivate_locked_super+0xa0/0x100 fs/super.c:335 deactivate_super+0xaf/0xe0 fs/super.c:366 cleanup_mnt+0x446/0x500 fs/namespace.c:1123 __cleanup_mnt+0x19/0x20 fs/namespace.c:1130 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa4f/0x2480 kernel/exit.c:872 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb Second to 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:2980 [inline] call_rcu+0x10e/0x1050 kernel/rcu/tree.c:3054 dentry_free+0xbd/0x150 fs/dcache.c:-1 __dentry_kill+0x50a/0x650 fs/dcache.c:597 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x42/0x80 fs/dcache.c:883 handle_mounts fs/namei.c:1493 [inline] step_into+0x8f0/0xcf0 fs/namei.c:1790 walk_component+0x26a/0x460 fs/namei.c:1966 link_path_walk+0x5b2/0xb80 fs/namei.c:-1 path_openat+0x27c/0x3160 fs/namei.c:3513 do_filp_open+0x1b3/0x3e0 fs/namei.c:3544 do_sys_openat2+0x14c/0x6d0 fs/open.c:1219 do_sys_open fs/open.c:1235 [inline] __do_sys_openat fs/open.c:1251 [inline] __se_sys_openat fs/open.c:1246 [inline] __x64_sys_openat+0x136/0x160 fs/open.c:1246 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 ffff888110409770 which belongs to the cache dentry of size 208 The buggy address is located 0 bytes inside of 208-byte region [ffff888110409770, ffff888110409840) The buggy address belongs to the page: page:ffffea0004410240 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x110409 flags: 0x4000000000000200(slab) raw: 4000000000000200 0000000000000000 0000000100000001 ffff88810018b980 raw: 0000000000000000 00000000000f000f 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x12cd0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_RECLAIMABLE), pid 107, ts 3775356543, 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:5370 alloc_slab_page mm/slub.c:-1 [inline] allocate_slab mm/slub.c:1813 [inline] new_slab+0x84/0x3f0 mm/slub.c:1874 new_slab_objects mm/slub.c:2632 [inline] ___slab_alloc+0x2a6/0x450 mm/slub.c:2796 __slab_alloc+0x63/0xa0 mm/slub.c:2836 slab_alloc_node mm/slub.c:2918 [inline] slab_alloc mm/slub.c:2960 [inline] kmem_cache_alloc+0x1af/0x2e0 mm/slub.c:2965 __d_alloc+0x2d/0x6a0 fs/dcache.c:1714 d_alloc fs/dcache.c:1793 [inline] d_alloc_parallel+0xe1/0x1390 fs/dcache.c:2549 __lookup_slow+0x13e/0x3e0 fs/namei.c:1633 lookup_slow+0x57/0x70 fs/namei.c:1665 walk_component+0x325/0x460 fs/namei.c:1960 link_path_walk+0x5b2/0xb80 fs/namei.c:-1 path_parentat fs/namei.c:2487 [inline] filename_parentat+0x1f0/0x5a0 fs/namei.c:2509 do_unlinkat+0xd6/0x670 fs/namei.c:4018 __do_sys_unlink fs/namei.c:4090 [inline] __se_sys_unlink fs/namei.c:4088 [inline] __x64_sys_unlink+0x49/0x50 fs/namei.c:4088 page_owner free stack trace missing Memory state around the buggy address: ffff888110409600: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb ffff888110409680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888110409700: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb ^ ffff888110409780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888110409800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ================================================================== ------------[ cut here ]------------ WARNING: CPU: 1 PID: 476 at fs/dcache.c:766 fast_dput+0x210/0x290 fs/dcache.c:766 Modules linked in: CPU: 1 PID: 476 Comm: syz.3.38 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:fast_dput+0x210/0x290 fs/dcache.c:766 Code: 03 f3 ff e9 46 fe ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 99 fe ff ff 48 89 df e8 1a 03 f3 ff e9 8c fe ff ff e8 90 14 b9 ff <0f> 0b e9 0b ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c e4 fe ff RSP: 0018:ffffc90000eaf840 EFLAGS: 00010293 RAX: ffffffff81aa8ff0 RBX: ffff888110409770 RCX: ffff888113490000 RDX: 0000000000000000 RSI: 00000000ffffff80 RDI: 0000000000000001 RBP: ffffc90000eaf870 R08: 0000000000000004 R09: 0000000000000003 R10: fffff520001d5ef8 R11: 1ffff920001d5ef8 R12: 00000000ffffff80 R13: dffffc0000000000 R14: ffff8881104097c8 R15: 1ffff110220812f9 FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9a2b7b8198 CR3: 000000012488c000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dput+0x21/0x80 fs/dcache.c:870 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166 incfs_kill_sb+0x1aa/0x210 fs/incfs/vfs.c:1979 deactivate_locked_super+0xa0/0x100 fs/super.c:335 deactivate_super+0xaf/0xe0 fs/super.c:366 cleanup_mnt+0x446/0x500 fs/namespace.c:1123 __cleanup_mnt+0x19/0x20 fs/namespace.c:1130 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa4f/0x2480 kernel/exit.c:872 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0d8e69d005 Code: Unable to access opcode bytes at RIP 0x7f0d8e69cfdb. RSP: 002b:00007f0d8d0d1f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f0d8e8c0fa0 RCX: 00007f0d8e69d005 RDX: 00007f0d8d0d1fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f0d8e6eef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d8e8c1038 R14: 00007f0d8e8c0fa0 R15: 00007ffd111325c8 ---[ end trace ca9834021dcffe64 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 476 at fs/dcache.c:641 retain_dentry+0x158/0x2a0 fs/dcache.c:641 Modules linked in: CPU: 0 PID: 476 Comm: syz.3.38 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:retain_dentry+0x158/0x2a0 fs/dcache.c:641 Code: 31 ff e8 8b 16 b9 ff 44 89 e8 83 e0 40 0f 84 a5 00 00 00 e8 ca 12 b9 ff b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 b8 12 b9 ff <0f> 0b e9 f9 fe ff ff e8 ac 12 b9 ff 31 c0 eb e0 e8 a3 12 b9 ff 31 RSP: 0018:ffffc90000eaf848 EFLAGS: 00010293 RAX: ffffffff81aa91c8 RBX: ffff888110409ee0 RCX: ffff888113490000 RDX: 0000000000000000 RSI: 0000000010000000 RDI: 0000000000000000 RBP: ffffc90000eaf870 R08: 0000000000000004 R09: 0000000000000003 R10: fffff520001d5ef0 R11: 1ffff920001d5ef0 R12: 1ffff110220813dc R13: ffff88811389a3c8 R14: 0000000010000000 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1118388198 CR3: 000000010d46e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dput+0x36/0x80 fs/dcache.c:878 incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167 incfs_kill_sb+0x1aa/0x210 fs/incfs/vfs.c:1979 deactivate_locked_super+0xa0/0x100 fs/super.c:335 deactivate_super+0xaf/0xe0 fs/super.c:366 cleanup_mnt+0x446/0x500 fs/namespace.c:1123 __cleanup_mnt+0x19/0x20 fs/namespace.c:1130 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa4f/0x2480 kernel/exit.c:872 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0d8e69d005 Code: Unable to access opcode bytes at RIP 0x7f0d8e69cfdb. RSP: 002b:00007f0d8d0d1f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f0d8e8c0fa0 RCX: 00007f0d8e69d005 RDX: 00007f0d8d0d1fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f0d8e6eef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d8e8c1038 R14: 00007f0d8e8c0fa0 R15: 00007ffd111325c8 ---[ end trace ca9834021dcffe65 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 476 at fs/dcache.c:418 d_lru_del fs/dcache.c:418 [inline] WARNING: CPU: 0 PID: 476 at fs/dcache.c:418 __dentry_kill+0x54e/0x650 fs/dcache.c:575 Modules linked in: CPU: 0 PID: 476 Comm: syz.3.38 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:d_lru_del fs/dcache.c:418 [inline] RIP: 0010:__dentry_kill+0x54e/0x650 fs/dcache.c:575 Code: 00 44 89 33 4c 89 ff e8 b0 a1 cd 02 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 4c fc b8 ff e9 b8 fe ff ff e8 42 fc b8 ff <0f> 0b e9 3b fc ff ff e8 36 fc b8 ff e9 83 fe ff ff 89 d9 80 e1 07 RSP: 0018:ffffc90000eaf7e8 EFLAGS: 00010293 RAX: ffffffff81aaa83e RBX: ffff888110409ee0 RCX: ffff888113490000 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff RBP: ffffc90000eaf830 R08: 0000000000000004 R09: 0000000000000003 R10: fffff520001d5ee4 R11: 1ffff920001d5ee4 R12: 1ffff110220813dc R13: dffffc0000000000 R14: 0000000000000000 R15: ffff888110409f38 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1118388198 CR3: 000000010d46e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x42/0x80 fs/dcache.c:883 incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167 incfs_kill_sb+0x1aa/0x210 fs/incfs/vfs.c:1979 deactivate_locked_super+0xa0/0x100 fs/super.c:335 deactivate_super+0xaf/0xe0 fs/super.c:366 cleanup_mnt+0x446/0x500 fs/namespace.c:1123 __cleanup_mnt+0x19/0x20 fs/namespace.c:1130 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa4f/0x2480 kernel/exit.c:872 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0d8e69d005 Code: Unable to access opcode bytes at RIP 0x7f0d8e69cfdb. RSP: 002b:00007f0d8d0d1f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f0d8e8c0fa0 RCX: 00007f0d8e69d005 RDX: 00007f0d8d0d1fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f0d8e6eef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d8e8c1038 R14: 00007f0d8e8c0fa0 R15: 00007ffd111325c8 ---[ end trace ca9834021dcffe66 ]--- list_del corruption. prev->next should be ffff888110409f70, but was ffff888110409910 ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:61! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 476 Comm: syz.3.38 Tainted: G B W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59 Code: 48 89 de e8 a6 2f 32 02 0f 0b 48 c7 c7 a0 32 20 85 48 89 de e8 95 2f 32 02 0f 0b 48 c7 c7 00 33 20 85 48 89 de e8 84 2f 32 02 <0f> 0b 48 c7 c7 60 33 20 85 48 89 de e8 73 2f 32 02 0f 0b 00 55 48 RSP: 0018:ffffc90000eaf7b8 EFLAGS: 00010246 RAX: 0000000000000054 RBX: ffff888110409f70 RCX: 5e8a52d131213400 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000eaf7d8 R08: dffffc0000000000 R09: fffff520001d5e2d R10: fffff520001d5e2d R11: 1ffff920001d5e2c R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff888110409910 R15: ffff88811062c6f0 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1118388198 CR3: 000000010d46e000 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] dentry_unlist fs/dcache.c:526 [inline] __dentry_kill+0x24c/0x650 fs/dcache.c:579 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1 dput+0x42/0x80 fs/dcache.c:883 incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167 incfs_kill_sb+0x1aa/0x210 fs/incfs/vfs.c:1979 deactivate_locked_super+0xa0/0x100 fs/super.c:335 deactivate_super+0xaf/0xe0 fs/super.c:366 cleanup_mnt+0x446/0x500 fs/namespace.c:1123 __cleanup_mnt+0x19/0x20 fs/namespace.c:1130 task_work_run+0x127/0x190 kernel/task_work.c:189 exit_task_work include/linux/task_work.h:33 [inline] do_exit+0xa4f/0x2480 kernel/exit.c:872 do_group_exit+0x141/0x310 kernel/exit.c:986 get_signal+0xf7d/0x12e0 kernel/signal.c:2793 arch_do_signal_or_restart+0xbf/0x10f0 arch/x86/kernel/signal.c:805 handle_signal_work kernel/entry/common.c:145 [inline] exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f0d8e69d005 Code: Unable to access opcode bytes at RIP 0x7f0d8e69cfdb. RSP: 002b:00007f0d8d0d1f80 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6 RAX: fffffffffffffdfc RBX: 00007f0d8e8c0fa0 RCX: 00007f0d8e69d005 RDX: 00007f0d8d0d1fc0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f0d8e6eef91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000 R13: 00007f0d8e8c1038 R14: 00007f0d8e8c0fa0 R15: 00007ffd111325c8 Modules linked in: ---[ end trace ca9834021dcffe67 ]--- RIP: 0010:__list_del_entry_valid+0x10c/0x120 lib/list_debug.c:59 Code: 48 89 de e8 a6 2f 32 02 0f 0b 48 c7 c7 a0 32 20 85 48 89 de e8 95 2f 32 02 0f 0b 48 c7 c7 00 33 20 85 48 89 de e8 84 2f 32 02 <0f> 0b 48 c7 c7 60 33 20 85 48 89 de e8 73 2f 32 02 0f 0b 00 55 48 RSP: 0018:ffffc90000eaf7b8 EFLAGS: 00010246 RAX: 0000000000000054 RBX: ffff888110409f70 RCX: 5e8a52d131213400 RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000 RBP: ffffc90000eaf7d8 R08: dffffc0000000000 R09: fffff520001d5e2d R10: fffff520001d5e2d R11: 1ffff920001d5e2c R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff888110409910 R15: ffff88811062c6f0 FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1118388198 CR3: 000000010d46e000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400