KASAN: use-after-free Write in __run_timers

Status: upstream: reported C repro on 2024/12/01 07:19
Bug presence: origin:lts
[Documentation on labels]
Reported-by: syzbot+42f23b6967da57abbb39@syzkaller.appspotmail.com
First crash: 602d, last: 1d09h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/12/01 lts (merge base) 0d968ced7330 C [report] KASAN: use-after-free Write in enqueue_timer
2024/12/01 upstream (ToT) bcc8eda6d349 C Didn't crash
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 KASAN: use-after-free Write in __run_timers origin:lts-only 22 C error 1 193d 226d 0/3 auto-obsoleted due to no activity on 2026/06/03 21:03
android-54 KASAN: use-after-free Write in __run_timers (2) 22 C 752 426d 516d 0/2 upstream: reported C repro on 2025/02/25 14:17
upstream KASAN: use-after-free Write in __run_timers 22 6144 3199d 3259d 3/29 fixed on 2017/11/11 01:37
android-54 KASAN: use-after-free Write in __run_timers 22 syz 449 753d 2205d 0/2 auto-obsoleted due to no activity on 2024/09/11 00:16
upstream KASAN: invalid-access Write in __run_timers kernel -1 8 1983d 1989d 0/29 auto-closed as invalid on 2021/05/20 13:15
upstream KMSAN: uninit-value in __run_timers (3) net 7 C error 4 1055d 1091d 0/29 auto-obsoleted due to no activity on 2024/01/10 00:11
upstream KASAN: slab-use-after-free Write in __run_timers net 22 1 512d 512d 0/29 closed as invalid on 2025/03/30 10:14
upstream BUG: unable to handle kernel paging request in __run_timers (2) sound virt net 21 4 176d 272d 0/29 auto-obsoleted due to no activity on 2026/05/01 08:57
android-54 KASAN: slab-out-of-bounds Write in __run_timers 21 4 1854d 2044d 0/2 auto-closed as invalid on 2021/10/26 12:53
upstream BUG: unable to handle kernel NULL pointer dereference in __run_timers arm 10 1 788d 784d 0/29 auto-obsoleted due to no activity on 2024/08/27 10:03
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/04/11 03:32 1h08m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in hlist_move_list include/linux/list.h:1014 [inline]
BUG: KASAN: use-after-free in collect_expired_timers kernel/time/timer.c:1625 [inline]
BUG: KASAN: use-after-free in __run_timers+0x341/0x9b0 kernel/time/timer.c:1861
Write of size 8 at addr ffff88811aeb4a00 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <IRQ>
 __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_store8_noabort+0x17/0x20 mm/kasan/report_generic.c:356
 hlist_move_list include/linux/list.h:1014 [inline]
 collect_expired_timers kernel/time/timer.c:1625 [inline]
 __run_timers+0x341/0x9b0 kernel/time/timer.c:1861
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1888
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:742
Code: cc 00 00 cc cc 00 00 cc cc 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 48 89 e5 66 90 0f 00 2d 63 7b 65 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90
RSP: 0018:ffffc90000147dd8 EFLAGS: 00000257
RAX: ffff8881f6f00000 RBX: ffff888100332880 RCX: 3ca9454812aa2a00
RDX: 0000000000000001 RSI: ffffffff85ca6000 RDI: ffffffff85ca5fc0
RBP: ffffc90000147dd8 R08: ffff8881f6f348b3 R09: 1ffff1103ede6916
R10: 0000000000000000 R11: ffffffff8500b370 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888100332880 R15: dffffc0000000000
 arch_cpu_idle+0x1c/0x20 arch/x86/kernel/process.c:733
 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x354/0x640 kernel/sched/idle.c:323
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:422
 start_secondary+0x119/0x120 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>

Allocated by task 420:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc+0xb4/0x1e0 mm/slab_common.c:951
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 hci_alloc_dev_priv+0x27/0x1bd0 net/bluetooth/hci_core.c:2433
 hci_alloc_dev include/net/bluetooth/hci_core.h:1505 [inline]
 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:641 [inline]
 hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:719 [inline]
 hci_uart_tty_ioctl+0x3c4/0xa40 drivers/bluetooth/hci_ldisc.c:774
 tty_ioctl+0x8ef/0xc60 drivers/tty/tty_io.c:2785
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 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 419:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2b/0x40 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+0xb7/0x1b0 mm/slub.c:3728
 kfree+0x6f/0xf0 mm/slab_common.c:990
 hci_release_dev+0x12a3/0x13b0 net/bluetooth/hci_core.c:2761
 bt_host_release+0x82/0x90 net/bluetooth/hci_sysfs.c:85
 device_release+0xa4/0x1d0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:681 [inline]
 kobject_release lib/kobject.c:712 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x19d/0x280 lib/kobject.c:729
 put_device+0x1f/0x30 drivers/base/core.c:3806
 hci_dev_put include/net/bluetooth/hci_core.h:1465 [inline]
 hci_dev_cmd+0x279/0x740 net/bluetooth/hci_core.c:795
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x114/0x330 net/socket.c:1191
 sock_ioctl+0x475/0x700 net/socket.c:1310
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 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

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
 insert_work+0x51/0x300 kernel/workqueue.c:1368
 __queue_work+0x9d0/0xd50 kernel/workqueue.c:1527
 queue_work_on+0xde/0x150 kernel/workqueue.c:1555
 queue_work include/linux/workqueue.h:510 [inline]
 hci_cmd_sync_run net/bluetooth/hci_sync.c:140 [inline]
 __hci_cmd_sync_sk+0xaa8/0xd80 net/bluetooth/hci_sync.c:162
 __hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:253 [inline]
 __hci_cmd_sync_status net/bluetooth/hci_sync.c:277 [inline]
 hci_cmd_sync_status+0x53/0x120 net/bluetooth/hci_sync.c:288
 hci_dev_cmd+0x357/0x740 net/bluetooth/hci_core.c:749
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x114/0x330 net/socket.c:1191
 sock_ioctl+0x475/0x700 net/socket.c:1310
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 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
 insert_work+0x51/0x300 kernel/workqueue.c:1368
 __queue_work+0x9d0/0xd50 kernel/workqueue.c:1527
 queue_work_on+0xde/0x150 kernel/workqueue.c:1555
 queue_work include/linux/workqueue.h:510 [inline]
 hci_cmd_sync_run net/bluetooth/hci_sync.c:140 [inline]
 __hci_cmd_sync_sk+0xaa8/0xd80 net/bluetooth/hci_sync.c:162
 __hci_cmd_sync_status_sk net/bluetooth/hci_sync.c:253 [inline]
 __hci_cmd_sync_status net/bluetooth/hci_sync.c:277 [inline]
 hci_cmd_sync_status+0x53/0x120 net/bluetooth/hci_sync.c:288
 hci_dev_cmd+0x357/0x740 net/bluetooth/hci_core.c:749
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x114/0x330 net/socket.c:1191
 sock_ioctl+0x475/0x700 net/socket.c:1310
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 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 ffff88811aeb4000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2560 bytes inside of
 8192-byte region [ffff88811aeb4000, ffff88811aeb6000)

The buggy address belongs to the physical page:
page:ffffea00046bac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11aeb0
head:ffffea00046bac00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff888100043500
raw: 0000000000000000 0000000000020002 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 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 420, tgid 420 (syz.6.28), ts 37536485983, free_ts 37535327043
 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+0x2ca9/0x2d20 mm/page_alloc.c:4586
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5930
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3e0 mm/slub.c:2020
 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc+0xa4/0x1e0 mm/slab_common.c:951
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 hci_alloc_dev_priv+0x27/0x1bd0 net/bluetooth/hci_core.c:2433
 hci_alloc_dev include/net/bluetooth/hci_core.h:1505 [inline]
 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:641 [inline]
 hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:719 [inline]
 hci_uart_tty_ioctl+0x3c4/0xa40 drivers/bluetooth/hci_ldisc.c:774
 tty_ioctl+0x8ef/0xc60 drivers/tty/tty_io.c:2785
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:26 [inline]
 free_pages_prepare mm/page_alloc.c:1580 [inline]
 free_pcp_prepare mm/page_alloc.c:1654 [inline]
 free_unref_page_prepare+0x80c/0x820 mm/page_alloc.c:3621
 free_unref_page+0x93/0x530 mm/page_alloc.c:3719
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6020
 __free_slab+0xc7/0x1a0 mm/slub.c:2044
 free_slab mm/slub.c:2059 [inline]
 discard_slab mm/slub.c:2065 [inline]
 __unfreeze_partials+0x15a/0x190 mm/slub.c:2614
 put_cpu_partial+0xa9/0x100 mm/slub.c:2690
 __slab_free+0x1c4/0x280 mm/slub.c:3589
 do_slab_free mm/slub.c:3666 [inline]
 ___cache_free+0xbf/0xd0 mm/slub.c:3722
 qlink_free mm/kasan/quarantine.c:168 [inline]
 qlist_free_all+0xc6/0x140 mm/kasan/quarantine.c:187
 kasan_quarantine_reduce+0x14a/0x170 mm/kasan/quarantine.c:294
 __kasan_slab_alloc+0x24/0x80 mm/kasan/common.c:311
 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+0x166/0x320 mm/slub.c:3408
 kmem_cache_zalloc include/linux/slab.h:689 [inline]
 lsm_inode_alloc security/security.c:597 [inline]
 security_inode_alloc+0x33/0x120 security/security.c:1041
 inode_init_always+0x6ee/0x950 fs/inode.c:235
 alloc_inode fs/inode.c:271 [inline]
 new_inode_pseudo+0xa2/0x1f0 fs/inode.c:1074

Memory state around the buggy address:
 ffff88811aeb4900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811aeb4980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88811aeb4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88811aeb4a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811aeb4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 PID: 0 Comm: swapper/1 Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:__queue_work+0x582/0xd50 kernel/workqueue.c:-1
Code: b4 00 00 00 e8 7f 4d 29 00 48 bb 00 00 00 00 00 fc ff df 4c 89 ef e8 fd d6 b8 03 4c 8b 65 d0 4c 8b 6d c0 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 30 d8 6e 00 49 8b 3e e8 98 d2 b8 03
RSP: 0018:ffffc900001b0c78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888100332880
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: 0000000000000007 R09: 00000000fffffffb
R10: dffffc0000000000 R11: ffffed10235d6939 R12: ffff88811aeb49c8
R13: ffff88812c706000 R14: 0000000000000000 R15: 000000007fffffff
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf21148060 CR3: 0000000122eda000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 delayed_work_timer_fn+0x61/0x80 kernel/workqueue.c:1653
 call_timer_fn+0x46/0x2a0 kernel/time/timer.c:1553
 expire_timers kernel/time/timer.c:1599 [inline]
 __run_timers+0x672/0x9b0 kernel/time/timer.c:1875
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1888
 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
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:742
Code: cc 00 00 cc cc 00 00 cc cc 00 00 90 90 90 90 90 90 90 90 90 90 90 b8 0c 67 40 a5 55 48 89 e5 66 90 0f 00 2d 63 7b 65 00 fb f4 <5d> c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 90 90 90 90 90
RSP: 0018:ffffc90000147dd8 EFLAGS: 00000257
RAX: ffff8881f6f00000 RBX: ffff888100332880 RCX: 3ca9454812aa2a00
RDX: 0000000000000001 RSI: ffffffff85ca6000 RDI: ffffffff85ca5fc0
RBP: ffffc90000147dd8 R08: ffff8881f6f348b3 R09: 1ffff1103ede6916
R10: 0000000000000000 R11: ffffffff8500b370 R12: dffffc0000000000
R13: 0000000000000001 R14: ffff888100332880 R15: dffffc0000000000
 arch_cpu_idle+0x1c/0x20 arch/x86/kernel/process.c:733
 default_idle_call+0x71/0x1d0 kernel/sched/idle.c:109
 cpuidle_idle_call kernel/sched/idle.c:199 [inline]
 do_idle+0x354/0x640 kernel/sched/idle.c:323
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:422
 start_secondary+0x119/0x120 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x582/0xd50 kernel/workqueue.c:-1
Code: b4 00 00 00 e8 7f 4d 29 00 48 bb 00 00 00 00 00 fc ff df 4c 89 ef e8 fd d6 b8 03 4c 8b 65 d0 4c 8b 6d c0 4c 89 f0 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 f7 e8 30 d8 6e 00 49 8b 3e e8 98 d2 b8 03
RSP: 0018:ffffc900001b0c78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff888100332880
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: 0000000000000007 R09: 00000000fffffffb
R10: dffffc0000000000 R11: ffffed10235d6939 R12: ffff88811aeb49c8
R13: ffff88812c706000 R14: 0000000000000000 R15: 000000007fffffff
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fcf21148060 CR3: 0000000122eda000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	cc                   	int3
   1:	00 00                	add    %al,(%rax)
   3:	cc                   	int3
   4:	cc                   	int3
   5:	00 00                	add    %al,(%rax)
   7:	cc                   	int3
   8:	cc                   	int3
   9:	00 00                	add    %al,(%rax)
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	b8 0c 67 40 a5       	mov    $0xa540670c,%eax
  1b:	55                   	push   %rbp
  1c:	48 89 e5             	mov    %rsp,%rbp
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d 63 7b 65 00 	verw   0x657b63(%rip)        # 0x657b8b
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	5d                   	pop    %rbp <-- trapping instruction
  2b:	c3                   	ret
  2c:	66 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  33:	00 00 00
  36:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop

Crashes (1025):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/06/20 02:18 android14-6.1 9f35ca3ff66c 43bfcdb0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/04 07:20 android14-6.1 1e4e23ff0f90 a0d91488 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/02/24 13:06 android14-6.1 34c1a8e17200 96b1aa46 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/02/19 23:38 android14-6.1 edbe3e111301 c8d8c52d .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/02/15 14:51 android14-6.1 edbe3e111301 1e62d198 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/02/11 19:56 android14-6.1 edbe3e111301 75707236 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/01/20 18:04 android14-6.1 1c6403722ffe 06648d9c .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/01/19 04:43 android14-6.1 37a76cbe8f87 20d37d28 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/01/08 19:53 android14-6.1 524f9ed7e312 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/01/08 16:55 android14-6.1 524f9ed7e312 d6526ea3 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/28 09:07 android14-6.1 47b374a18638 e12e5ba4 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/14 02:56 android14-6.1 c750dc582629 22ec1469 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/14 01:04 android14-6.1 c750dc582629 22ec1469 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/13 22:24 android14-6.1 c750dc582629 22ec1469 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/13 20:24 android14-6.1 c750dc582629 22ec1469 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/05 02:59 android14-6.1 7011769d221c d869b261 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/17 18:53 android14-6.1 6246d345f550 cfebc887 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/07 19:05 android14-6.1 7af56ffc913d 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/07 15:27 android14-6.1 7af56ffc913d 4826c28e .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/04/23 09:44 android14-6.1 642656a36791 53a8b9bd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/02/18 05:46 android14-6.1 ccc915784332 429ea007 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/02/18 03:42 android14-6.1 ccc915784332 429ea007 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/02/18 03:05 android14-6.1 ccc915784332 429ea007 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/02/18 02:25 android14-6.1 ccc915784332 429ea007 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2024/12/19 10:37 android14-6.1 e50cf165f4e7 1432fc84 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2024/12/02 04:36 android14-6.1 a887a44ace2a 68914665 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2024/12/01 23:39 android14-6.1 a887a44ace2a 68914665 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2024/12/01 11:17 android14-6.1 a887a44ace2a 68914665 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2024/12/01 07:06 android14-6.1 a887a44ace2a 68914665 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/18 00:14 android14-6.1 ba4506940166 e77fae15 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/17 10:55 android14-6.1 6246d345f550 cfebc887 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/25 05:28 android14-6.1 92668decd5e0 492bab15 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/24 14:49 android14-6.1 92668decd5e0 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/24 01:09 android14-6.1 92668decd5e0 544adce9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/23 18:06 android14-6.1 92668decd5e0 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/23 17:05 android14-6.1 92668decd5e0 71a13572 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/23 02:07 android14-6.1 92668decd5e0 881ce5c2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/21 14:31 android14-6.1 72b456bf57ad 7c5de9c3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/20 13:17 android14-6.1 c7e15f0bdc49 de6a700d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/18 06:56 android14-6.1 c7e15f0bdc49 72524a66 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/11 06:07 android14-6.1 21b931853e8d d78ea535 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/07 09:44 android14-6.1 2c70030ce6de 8e71ce95 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/04 08:09 android14-6.1 cf4093a4ac64 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/02 13:20 android14-6.1 cf4093a4ac64 27192279 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/01 06:24 android14-6.1 75aed2810c22 00a5cf1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/01 06:22 android14-6.1 75aed2810c22 00a5cf1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/07/01 03:58 android14-6.1 75aed2810c22 00a5cf1c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/29 14:37 android14-6.1 83f1262811ad 6a0c72dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/29 03:50 android14-6.1 83f1262811ad fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/27 22:20 android14-6.1 83f1262811ad fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/27 18:24 android14-6.1 83f1262811ad fb92f11c .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/23 11:29 android14-6.1 de145cc20dc6 4b1d8f01 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/23 05:28 android14-6.1 de145cc20dc6 5a630be6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/22 11:03 android14-6.1 72813af230c7 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/21 22:16 android14-6.1 72813af230c7 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/20 09:47 android14-6.1 9f35ca3ff66c 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/19 22:55 android14-6.1 9f35ca3ff66c 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/19 19:56 android14-6.1 9f35ca3ff66c 43bfcdb0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/18 10:11 android14-6.1 9f35ca3ff66c a776b0d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/18 02:57 android14-6.1 9f35ca3ff66c b62b3ded .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/08 10:38 android14-6.1 9b65e1b52152 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/06 12:23 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/06 06:57 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/06 06:56 android14-6.1 d73749230104 cc095639 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/03 08:41 android14-6.1 80aded6fbb9d 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/03 07:06 android14-6.1 80aded6fbb9d 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/06/03 03:04 android14-6.1 80aded6fbb9d 3c0d2131 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/25 23:19 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/25 11:23 android14-6.1 108b53924ea3 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/19 10:55 android14-6.1 6b66c1fa1434 223544dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/19 07:57 android14-6.1 6b66c1fa1434 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/19 05:46 android14-6.1 6b66c1fa1434 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/17 23:23 android14-6.1 75487b40c943 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/17 10:32 android14-6.1 75487b40c943 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/17 08:43 android14-6.1 75487b40c943 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/05/17 02:41 android14-6.1 75487b40c943 de5aae85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2024/12/01 01:14 android14-6.1 a887a44ace2a 68914665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
* Struck through repros no longer work on HEAD.