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KASAN: use-after-free Read in incfs_free_mount_info

Status: premoderation: reported on 2026/01/18 22:40
Reported-by: syzbot+5184cd9aebccb43b2981@syzkaller.appspotmail.com
First crash: 146d, last: 4d01h
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 KASAN: use-after-free Read in incfs_free_mount_info 19 516 1h31m 146d 0/2 premoderation: reported on 2026/01/19 00:38
android-5-15 KASAN: use-after-free Read in incfs_free_mount_info 19 142 19h58m 140d 0/2 premoderation: reported on 2026/01/25 07:55

Sample crash report:
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5077c360
R13: 00007f4ac24321ca R14: 0000555569e724e8 R15: 00007ffc5077d430
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in fast_dput+0x1e9/0x290 fs/dcache.c:778
Read of size 4 at addr ffff8881168a8220 by task syz-executor/287

CPU: 0 PID: 287 Comm: syz-executor Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:350
 fast_dput+0x1e9/0x290 fs/dcache.c:778
 dput+0x21/0x80 fs/dcache.c:905
 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:2003
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x474/0x500 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 __do_sys_exit_group kernel/exit.c:1040 [inline]
 __se_sys_exit_group kernel/exit.c:1038 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1038
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4ac239ce59
Code: Unable to access opcode bytes at 0x7f4ac239ce2f.
RSP: 002b:00007ffc5077b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4ac243222a RCX: 00007f4ac239ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f4ac24321ca
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5077c360
R13: 00007f4ac24321ca R14: 0000555569e724e8 R15: 00007ffc5077d430
 </TASK>

Allocated by task 3130:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x72/0x80 mm/kasan/common.c:334
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x4f/0x2d0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3382 [inline]
 slab_alloc mm/slub.c:3392 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3399 [inline]
 kmem_cache_alloc_lru+0x104/0x280 mm/slub.c:3415
 __d_alloc+0x34/0x6c0 fs/dcache.c:1774
 d_alloc fs/dcache.c:1854 [inline]
 d_alloc_parallel+0xe2/0x12e0 fs/dcache.c:2647
 __lookup_slow+0x14f/0x410 fs/namei.c:1682
 lookup_one_len+0x19d/0x2e0 fs/namei.c:2747
 incfs_lookup_dentry+0x60/0xb0 fs/incfs/data_mgmt.c:210
 open_or_create_special_dir+0x4f/0x1d0 fs/incfs/vfs.c:475
 incfs_mount_fs+0x42f/0x890 fs/incfs/vfs.c:1890
 legacy_get_tree+0xfe/0x1a0 fs/fs_context.c:632
 vfs_get_tree+0x9a/0x270 fs/super.c:1578
 do_new_mount+0x251/0xb30 fs/namespace.c:3081
 path_mount+0x659/0xfc0 fs/namespace.c:3411
 do_mount fs/namespace.c:3424 [inline]
 __do_sys_mount fs/namespace.c:3632 [inline]
 __se_sys_mount+0x320/0x390 fs/namespace.c:3609
 __x64_sys_mount+0xbf/0xd0 fs/namespace.c:3609
 x64_sys_call+0x65d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 3123:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x31/0x50 mm/kasan/generic.c:516
 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1750 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
 slab_free mm/slub.c:3712 [inline]
 kmem_cache_free+0x12d/0x300 mm/slub.c:3737
 __d_free+0x23/0x30 fs/dcache.c:298
 rcu_do_batch+0x52a/0xbc0 kernel/rcu/tree.c:2297
 rcu_core+0x5c3/0xe80 kernel/rcu/tree.c:2557
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2574
 handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
 __do_softirq kernel/softirq.c:680 [inline]
 invoke_softirq kernel/softirq.c:497 [inline]
 __irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
 irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1118
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 __call_rcu_common kernel/rcu/tree.c:2807 [inline]
 call_rcu+0xcf/0xf90 kernel/rcu/tree.c:2926
 dentry_free+0xbd/0x150 fs/dcache.c:-1
 __dentry_kill+0x529/0x670 fs/dcache.c:625
 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
 dput+0x42/0x80 fs/dcache.c:918
 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:2003
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x474/0x500 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 __do_sys_exit_group kernel/exit.c:1040 [inline]
 __se_sys_exit_group kernel/exit.c:1038 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1038
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Second to last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:46
 __kasan_record_aux_stack+0xb6/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 __call_rcu_common kernel/rcu/tree.c:2807 [inline]
 call_rcu+0xcf/0xf90 kernel/rcu/tree.c:2926
 dentry_free+0xbd/0x150 fs/dcache.c:-1
 __dentry_kill+0x529/0x670 fs/dcache.c:625
 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
 dput+0x42/0x80 fs/dcache.c:918
 do_unlinkat+0x34a/0x6d0 fs/namei.c:4400
 __do_sys_unlink fs/namei.c:4445 [inline]
 __se_sys_unlink fs/namei.c:4443 [inline]
 __x64_sys_unlink+0x49/0x50 fs/namei.c:4443
 x64_sys_call+0x958/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:88
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff8881168a8220
 which belongs to the cache dentry of size 208
The buggy address is located 0 bytes inside of
 208-byte region [ffff8881168a8220, ffff8881168a82f0)

The buggy address belongs to the physical page:
page:ffffea00045a2a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8881168a8440 pfn:0x1168a8
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 ffffea0004caa608 ffffea0004f21008 ffff8881001ec300
raw: ffff8881168a8440 00000000000f000c 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 106, tgid 106 (udevd), ts 4634663497, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2672
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2679
 get_page_from_freelist+0x2d12/0x2d80 mm/page_alloc.c:4585
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5929
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2020
 ___slab_alloc+0x6bd/0xb20 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 slab_alloc mm/slub.c:3392 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3399 [inline]
 kmem_cache_alloc_lru+0x144/0x280 mm/slub.c:3415
 __d_alloc+0x34/0x6c0 fs/dcache.c:1774
 d_alloc fs/dcache.c:1854 [inline]
 d_alloc_parallel+0xe2/0x12e0 fs/dcache.c:2647
 __lookup_slow+0x14f/0x410 fs/namei.c:1682
 lookup_slow+0x57/0x70 fs/namei.c:1714
 walk_component+0x2f4/0x420 fs/namei.c:2005
 lookup_last fs/namei.c:2462 [inline]
 path_lookupat+0x180/0x490 fs/namei.c:2486
 filename_lookup+0x224/0x560 fs/namei.c:2515
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881168a8100: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881168a8180: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc
>ffff8881168a8200: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb
                               ^
 ffff8881168a8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
 ffff8881168a8300: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb
==================================================================
------------[ cut here ]------------
WARNING: CPU: 0 PID: 287 at fs/dcache.c:794 fast_dput+0x210/0x290 fs/dcache.c:794
Modules linked in:
CPU: 0 PID: 287 Comm: syz-executor Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:fast_dput+0x210/0x290 fs/dcache.c:794
Code: 97 f1 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 5a 97 f1 ff e9 8c fe ff ff e8 50 f2 ab 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:ffffc9000ca97ad0 EFLAGS: 00010293
RAX: ffffffff81c58930 RBX: ffff8881168a8220 RCX: ffff88810e02bcc0
RDX: 0000000000000000 RSI: 00000000ffffff80 RDI: 0000000000000001
RBP: ffffc9000ca97b00 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001952f4c R12: 00000000ffffff80
R13: dffffc0000000000 R14: ffff8881168a8278 R15: 1ffff11022d1504f
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95561ec4b8 CR3: 00000001276ee000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dput+0x21/0x80 fs/dcache.c:905
 incfs_free_mount_info+0x60/0x200 fs/incfs/data_mgmt.c:166
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:2003
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x474/0x500 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 __do_sys_exit_group kernel/exit.c:1040 [inline]
 __se_sys_exit_group kernel/exit.c:1038 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1038
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4ac239ce59
Code: Unable to access opcode bytes at 0x7f4ac239ce2f.
RSP: 002b:00007ffc5077b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4ac243222a RCX: 00007f4ac239ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f4ac24321ca
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5077c360
R13: 00007f4ac24321ca R14: 0000555569e724e8 R15: 00007ffc5077d430
 </TASK>
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 287 at fs/dcache.c:669 retain_dentry+0x158/0x2c0 fs/dcache.c:669
Modules linked in:
CPU: 1 PID: 287 Comm: syz-executor Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:retain_dentry+0x158/0x2c0 fs/dcache.c:669
Code: 31 ff e8 bb f4 ab ff 44 89 e8 83 e0 40 0f 84 b9 00 00 00 e8 8a f0 ab ff b0 01 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 78 f0 ab ff <0f> 0b e9 f9 fe ff ff e8 6c f0 ab ff 31 c0 eb e0 e8 63 f0 ab ff 31
RSP: 0018:ffffc9000ca97ad8 EFLAGS: 00010293
RAX: ffffffff81c58b08 RBX: ffff8881168a8990 RCX: ffff88810e02bcc0
RDX: 0000000000000000 RSI: 0000000010000000 RDI: 0000000000000000
RBP: ffffc9000ca97b00 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001952f30 R12: 1ffff11022d15132
R13: ffff888116dbf3c8 R14: 0000000010000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4581dec4b8 CR3: 0000000111c25000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dput+0x36/0x80 fs/dcache.c:913
 incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:2003
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x474/0x500 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 __do_sys_exit_group kernel/exit.c:1040 [inline]
 __se_sys_exit_group kernel/exit.c:1038 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1038
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4ac239ce59
Code: Unable to access opcode bytes at 0x7f4ac239ce2f.
RSP: 002b:00007ffc5077b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4ac243222a RCX: 00007f4ac239ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f4ac24321ca
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5077c360
R13: 00007f4ac24321ca R14: 0000555569e724e8 R15: 00007ffc5077d430
 </TASK>
---[ end trace 0000000000000000 ]---
------------[ cut here ]------------
WARNING: CPU: 1 PID: 287 at fs/dcache.c:445 d_lru_del fs/dcache.c:445 [inline]
WARNING: CPU: 1 PID: 287 at fs/dcache.c:445 __dentry_kill+0x56d/0x670 fs/dcache.c:603
Modules linked in:
CPU: 1 PID: 287 Comm: syz-executor Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:d_lru_del fs/dcache.c:445 [inline]
RIP: 0010:__dentry_kill+0x56d/0x670 fs/dcache.c:603
Code: 00 44 89 33 4c 89 ff e8 f1 c5 3c 03 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 e8 ed d7 ab ff e9 aa fe ff ff e8 e3 d7 ab ff <0f> 0b e9 2d fc ff ff e8 d7 d7 ab ff e9 75 fe ff ff 89 d9 80 e1 07
RSP: 0018:ffffc9000ca97a78 EFLAGS: 00010293
RAX: ffffffff81c5a39d RBX: ffff8881168a8990 RCX: ffff88810e02bcc0
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: ffffc9000ca97ac0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001952f34 R12: 1ffff11022d15132
R13: dffffc0000000000 R14: 0000000000100000 R15: ffff8881168a89e8
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4581dec4b8 CR3: 0000000111c25000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
 dput+0x42/0x80 fs/dcache.c:918
 incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:2003
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x474/0x500 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 __do_sys_exit_group kernel/exit.c:1040 [inline]
 __se_sys_exit_group kernel/exit.c:1038 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1038
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4ac239ce59
Code: Unable to access opcode bytes at 0x7f4ac239ce2f.
RSP: 002b:00007ffc5077b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4ac243222a RCX: 00007f4ac239ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f4ac24321ca
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5077c360
R13: 00007f4ac24321ca R14: 0000555569e724e8 R15: 00007ffc5077d430
 </TASK>
---[ end trace 0000000000000000 ]---
list_del corruption. prev->next should be ffff8881168a8a20, but was ffff8881168a8f70. (prev=ffff888132a6db40)
------------[ cut here ]------------
kernel BUG at lib/list_debug.c:61!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 287 Comm: syz-executor Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__list_del_entry_valid+0x10f/0x130 lib/list_debug.c:59
Code: e8 9e 51 89 02 0f 0b 48 c7 c7 e0 91 ca 85 48 89 de e8 8d 51 89 02 0f 0b 48 c7 c7 40 92 ca 85 48 89 de 4c 89 f9 e8 79 51 89 02 <0f> 0b 48 c7 c7 c0 92 ca 85 48 89 de 4c 89 f1 e8 65 51 89 02 0f 0b
RSP: 0018:ffffc9000ca97a48 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff8881168a8a20 RCX: 43ef155c03a64f00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc9000ca97a68 R08: ffffc9000ca97747 R09: 1ffff92001952ee8
R10: dffffc0000000000 R11: fffff52001952ee9 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8881168a8f70 R15: ffff888132a6db40
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4581dec4b8 CR3: 0000000111c25000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __list_del_entry include/linux/list.h:134 [inline]
 dentry_unlist fs/dcache.c:554 [inline]
 __dentry_kill+0x25d/0x670 fs/dcache.c:607
 dentry_kill+0xc0/0x2a0 fs/dcache.c:-1
 dput+0x42/0x80 fs/dcache.c:918
 incfs_free_mount_info+0x80/0x200 fs/incfs/data_mgmt.c:167
 incfs_kill_sb+0x1b8/0x220 fs/incfs/vfs.c:2003
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x474/0x500 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xa35/0x2660 kernel/exit.c:886
 do_group_exit+0x225/0x2e0 kernel/exit.c:1029
 __do_sys_exit_group kernel/exit.c:1040 [inline]
 __se_sys_exit_group kernel/exit.c:1038 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1038
 x64_sys_call+0x7b4/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f4ac239ce59
Code: Unable to access opcode bytes at 0x7f4ac239ce2f.
RSP: 002b:00007ffc5077b0a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4ac243222a RCX: 00007f4ac239ce59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000009 R08: 0000000000000000 R09: 00007f4ac24321ca
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc5077c360
R13: 00007f4ac24321ca R14: 0000555569e724e8 R15: 00007ffc5077d430
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__list_del_entry_valid+0x10f/0x130 lib/list_debug.c:59
Code: e8 9e 51 89 02 0f 0b 48 c7 c7 e0 91 ca 85 48 89 de e8 8d 51 89 02 0f 0b 48 c7 c7 40 92 ca 85 48 89 de 4c 89 f9 e8 79 51 89 02 <0f> 0b 48 c7 c7 c0 92 ca 85 48 89 de 4c 89 f1 e8 65 51 89 02 0f 0b
RSP: 0018:ffffc9000ca97a48 EFLAGS: 00010246
RAX: 000000000000006d RBX: ffff8881168a8a20 RCX: 43ef155c03a64f00
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffc9000ca97a68 R08: ffffc9000ca97747 R09: 1ffff92001952ee8
R10: dffffc0000000000 R11: fffff52001952ee9 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff8881168a8f70 R15: ffff888132a6db40
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4581dec4b8 CR3: 0000000111c25000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (106):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/10 06:28 android14-6.1 01e5078af295 34dab4be .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/09 03:41 android14-6.1 9b65e1b52152 656e94c6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/07 21:59 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/07 16:55 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/07 04:49 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/07 02:42 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/03 09:10 android14-6.1 80aded6fbb9d 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/06/02 16:08 android14-6.1 7d008958ef16 62fe1528 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/31 11:03 android14-6.1 b28955bde980 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/31 05:39 android14-6.1 b28955bde980 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/30 23:05 android14-6.1 b28955bde980 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/26 06:56 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/25 22:22 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/25 02:31 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/24 21:50 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/24 19:06 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/24 07:03 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/18 04:32 android14-6.1 75487b40c943 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/16 06:47 android14-6.1 6cac23303373 81fb92f3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/12 23:39 android14-6.1 17b41c3753e0 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/12 22:45 android14-6.1 17b41c3753e0 a0949470 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/12 19:28 android14-6.1 513bd92964a7 07aeade5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/10 14:00 android14-6.1 2f67b6088692 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/10 04:22 android14-6.1 2f67b6088692 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/09 15:10 android14-6.1 2f67b6088692 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/09 08:46 android14-6.1 2f67b6088692 29233ece .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/04 03:28 android14-6.1 1e4e23ff0f90 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/05/02 15:20 android14-6.1 1e4e23ff0f90 a0d91488 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/30 22:28 android14-6.1 50f84c5884c7 a7464baf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/28 14:14 android14-6.1 34e7543523a9 ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/28 02:52 android14-6.1 8852ea8c096a ce741359 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/27 05:34 android14-6.1 5d4307594b33 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/27 01:12 android14-6.1 5d4307594b33 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/26 12:37 android14-6.1 5d4307594b33 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/26 10:44 android14-6.1 5d4307594b33 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/26 00:24 android14-6.1 5d4307594b33 9c2d0995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/20 07:22 android14-6.1 7790109d9d13 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/20 05:16 android14-6.1 7790109d9d13 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/19 09:57 android14-6.1 7790109d9d13 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/18 10:03 android14-6.1 7790109d9d13 303e2802 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/13 09:31 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/13 03:21 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/13 01:25 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/12 17:15 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/12 11:21 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/12 09:06 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
2026/04/12 05:56 android14-6.1 4a2a41bddacb 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Read in incfs_free_mount_info
* Struck through repros no longer work on HEAD.