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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: 270d, last: 1d17h
▶ ▼ 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 (8)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-54 KASAN: use-after-free Write in __run_timers (2) 24 C 752 94d 183d 0/2 upstream: reported C repro on 2025/02/25 14:17
upstream KASAN: use-after-free Write in __run_timers 24 6144 2866d 2927d 3/29 fixed on 2017/11/11 01:37
android-54 KASAN: use-after-free Write in __run_timers 24 syz 449 421d 1873d 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 1650d 1657d 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 722d 759d 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 24 1 180d 180d 0/29 closed as invalid on 2025/03/30 10:14
android-54 KASAN: slab-out-of-bounds Write in __run_timers 23 4 1521d 1712d 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 455d 451d 0/29 auto-obsoleted due to no activity on 2024/08/27 10:03
▶ ▼ Last patch testing requests (7)
Created Duration User Patch Repo Result
2025/03/21 06:36 7m retest repro android14-6.1 report log
2025/03/21 06:36 7m retest repro android14-6.1 report log
2025/03/21 06:36 6m retest repro android14-6.1 report log
2025/03/21 06:36 10m retest repro android14-6.1 report log
2025/03/21 06:36 7m retest repro android14-6.1 report log
2025/03/06 06:41 11m retest repro android14-6.1 report log
2025/03/06 06:41 6m retest repro android14-6.1 report log
▶ ▼ 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:1576 [inline]
BUG: KASAN: use-after-free in __run_timers+0x32b/0x9a0 kernel/time/timer.c:1812
Write of size 8 at addr ffff888120c68a00 by task swapper/1/0

CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.1.145-syzkaller-00002-gc750dc582629 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <IRQ>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 print_address_description+0x71/0x210 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:427
 kasan_report+0x122/0x150 mm/kasan/report.c:531
 __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:1576 [inline]
 __run_timers+0x32b/0x9a0 kernel/time/timer.c:1812
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1839
 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: e9 47 ff ff ff 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 53 d2 52 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: ffff8881f7100000 RBX: ffff8881003b0000 RCX: eee69b97ebf4e900
RDX: 0000000000000001 RSI: ffffffff85aa0bc0 RDI: ffffffff85aa0b80
RBP: ffffc90000147dd8 R08: dffffc0000000000 R09: ffffed103ee26917
R10: 0000000000000000 R11: ffffffff84f36120 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881003b0000 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:191 [inline]
 do_idle+0x1a7/0x520 kernel/sched/idle.c:303
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:401
 start_secondary+0x119/0x120 arch/x86/kernel/smpboot.c:281
 secondary_startup_64_no_verify+0xce/0xdb
 </TASK>

Allocated by task 371:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x25/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:379 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:388
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc+0xb1/0x1e0 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:1484 [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+0x3d6/0xa20 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:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 376:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x31/0x50 mm/kasan/generic.c:516
 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1745 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1771
 slab_free mm/slub.c:3686 [inline]
 __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3702
 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:1444 [inline]
 hci_dev_cmd+0x265/0x720 net/bluetooth/hci_core.c:795
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x101/0x310 net/socket.c:1194
 sock_ioctl+0x4d8/0x6e0 net/socket.c:1311
 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:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45
 __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+0x9b1/0xd30 kernel/workqueue.c:1527
 queue_work_on+0xd2/0x140 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+0xa3e/0xcf0 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+0x628/0x720 net/bluetooth/hci_core.c:-1
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x101/0x310 net/socket.c:1194
 sock_ioctl+0x4d8/0x6e0 net/socket.c:1311
 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:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Second to last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:45
 __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+0x9b1/0xd30 kernel/workqueue.c:1527
 queue_work_on+0xd2/0x140 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+0xa3e/0xcf0 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+0x628/0x720 net/bluetooth/hci_core.c:-1
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x101/0x310 net/socket.c:1194
 sock_ioctl+0x4d8/0x6e0 net/socket.c:1311
 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:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888120c68000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2560 bytes inside of
 8192-byte region [ffff888120c68000, ffff888120c6a000)

The buggy address belongs to the physical page:
page:ffffea0004831a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x120c68
head:ffffea0004831a00 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 371, tgid 371 (syz-executor257), ts 54605126424, free_ts 54599334492
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2637
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2644
 get_page_from_freelist+0x2c7b/0x2cf0 mm/page_alloc.c:4544
 __alloc_pages+0x1c3/0x450 mm/page_alloc.c:5858
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1962 [inline]
 new_slab+0x98/0x3d0 mm/slub.c:2015
 ___slab_alloc+0x6f6/0xb50 mm/slub.c:3203
 __slab_alloc+0x5e/0xa0 mm/slub.c:3302
 slab_alloc_node mm/slub.c:3387 [inline]
 __kmem_cache_alloc_node+0x203/0x2c0 mm/slub.c:3462
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc+0xa1/0x1e0 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:1484 [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+0x3d6/0xa20 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:1545 [inline]
 free_pcp_prepare mm/page_alloc.c:1619 [inline]
 free_unref_page_prepare+0x742/0x750 mm/page_alloc.c:3581
 free_unref_page+0x8f/0x530 mm/page_alloc.c:3677
 free_the_page mm/page_alloc.c:830 [inline]
 free_compound_page+0x99/0xd0 mm/page_alloc.c:853
 destroy_large_folio+0x68/0xa0 mm/page_alloc.c:890
 __folio_put_large mm/swap.c:110 [inline]
 __folio_put+0xd1/0xe0 mm/swap.c:118
 folio_put include/linux/mm.h:1431 [inline]
 put_page include/linux/mm.h:1483 [inline]
 page_to_skb+0x4ad/0xb90 drivers/net/virtio_net.c:576
 receive_mergeable drivers/net/virtio_net.c:1158 [inline]
 receive_buf+0x435/0x4760 drivers/net/virtio_net.c:1297
 virtnet_receive drivers/net/virtio_net.c:1592 [inline]
 virtnet_poll+0x5af/0x1150 drivers/net/virtio_net.c:1710
 __napi_poll+0xd0/0x5e0 net/core/dev.c:6594
 napi_poll net/core/dev.c:6661 [inline]
 net_rx_action+0x49b/0xaa0 net/core/dev.c:6775
 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
 common_interrupt+0xbe/0xe0 arch/x86/kernel/irq.c:242
 asm_common_interrupt+0x27/0x40 arch/x86/include/asm/idtentry.h:682

Memory state around the buggy address:
 ffff888120c68900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888120c68980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888120c68a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888120c68a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888120c68b00: 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              6.1.145-syzkaller-00002-gc750dc582629 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__queue_work+0x575/0xd30 kernel/workqueue.c:-1
Code: 39 2b 0f 84 b9 00 00 00 e8 28 d7 28 00 4c 89 ff e8 50 60 ac 03 49 bc 00 00 00 00 00 fc ff df 4c 8b 6d d0 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 4c 3a 6d 00 49 8b 7d 00 e8 33 5c
RSP: 0018:ffffc900001b0c70 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 000000007fffffff RCX: ffff8881003b0000
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: fffffffffffffffb R09: 0000000000000007
R10: ffffed102418d139 R11: 1ffff1102418d139 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888120c689c8 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555771cf650 CR3: 0000000121b46000 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:1510
 expire_timers kernel/time/timer.c:1550 [inline]
 __run_timers+0x667/0x9a0 kernel/time/timer.c:1826
 run_timer_softirq+0x6a/0xf0 kernel/time/timer.c:1839
 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: e9 47 ff ff ff 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 53 d2 52 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: ffff8881f7100000 RBX: ffff8881003b0000 RCX: eee69b97ebf4e900
RDX: 0000000000000001 RSI: ffffffff85aa0bc0 RDI: ffffffff85aa0b80
RBP: ffffc90000147dd8 R08: dffffc0000000000 R09: ffffed103ee26917
R10: 0000000000000000 R11: ffffffff84f36120 R12: 0000000000000000
R13: 0000000000000000 R14: ffff8881003b0000 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:191 [inline]
 do_idle+0x1a7/0x520 kernel/sched/idle.c:303
 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:401
 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+0x575/0xd30 kernel/workqueue.c:-1
Code: 39 2b 0f 84 b9 00 00 00 e8 28 d7 28 00 4c 89 ff e8 50 60 ac 03 49 bc 00 00 00 00 00 fc ff df 4c 8b 6d d0 4c 89 e8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ef e8 4c 3a 6d 00 49 8b 7d 00 e8 33 5c
RSP: 0018:ffffc900001b0c70 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 000000007fffffff RCX: ffff8881003b0000
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: fffffffffffffffb R09: 0000000000000007
R10: ffffed102418d139 R11: 1ffff1102418d139 R12: dffffc0000000000
R13: 0000000000000000 R14: ffff888120c689c8 R15: 0000000000000008
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555771cf650 CR3: 0000000121b46000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	e9 47 ff ff ff       	jmp    0xffffff4c
   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 53 d2 52 00 	verw   0x52d253(%rip)        # 0x52d27b
  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 (307):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/08/26 14:22 android14-6.1 47b374a18638 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/18 21:21 android14-6.1 87b9d836c3d8 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/16 00:24 android14-6.1 87b9d836c3d8 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/14 08:51 android14-6.1 c750dc582629 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/13 17:34 android14-6.1 c750dc582629 22ec1469 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/11 19:00 android14-6.1 c750dc582629 c06e8995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/10 18:23 android14-6.1 c750dc582629 32a0e5ed .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/08/01 13:26 android14-6.1 42472e1a4913 40127d41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/31 17:51 android14-6.1 42472e1a4913 0c075d67 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/30 22:46 android14-6.1 2245c50c5f5f f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/30 09:25 android14-6.1 19fbea317851 f8f2b4da .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/27 23:51 android14-6.1 2ff414a09808 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/27 23:42 android14-6.1 2ff414a09808 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/26 02:45 android14-6.1 96160a0e0aa1 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/25 11:21 android14-6.1 96160a0e0aa1 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/24 18:07 android14-6.1 96160a0e0aa1 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/24 13:36 android14-6.1 96160a0e0aa1 65d60d73 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/22 14:29 android14-6.1 de932537be34 8e9d1dc1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/22 02:24 android14-6.1 de932537be34 1555463b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/21 14:44 android14-6.1 2dbfabb0eec8 56d87229 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/17 12:18 android14-6.1 145c7fad733f 0d1223f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/16 06:21 android14-6.1 145c7fad733f 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/16 03:00 android14-6.1 e2deb0b42a3a 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/16 02:59 android14-6.1 e2deb0b42a3a 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/15 21:45 android14-6.1 e2deb0b42a3a 03fcfc4b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/14 06:58 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/13 21:42 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/13 18:01 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/12 16:00 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/12 13:45 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/12 06:04 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/12 03:26 android14-6.1 e2deb0b42a3a 3cda49cf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/08 14:55 android14-6.1 fa7e0538663e 4d9fdfa4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/07 01:20 android14-6.1 7011769d221c 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/06 17:22 android14-6.1 7011769d221c 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/06 13:30 android14-6.1 7011769d221c 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/07/06 04:41 android14-6.1 7011769d221c 4f67c4ae .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/29 13:33 android14-6.1 36d69f6a49eb fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/29 10:50 android14-6.1 36d69f6a49eb fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/29 06:02 android14-6.1 36d69f6a49eb fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/23 21:55 android14-6.1 45271a2c461a e2f27c35 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/23 07:00 android14-6.1 45271a2c461a d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/22 14:01 android14-6.1 f6c21bc9a693 d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2025/06/18 13:39 android14-6.1 ba4506940166 ca631f70 .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.