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: 700d, last: 3d14h
▶ ▼ 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 (11)
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 syz, C error 1 290d 323d 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 syz, C 752 523d 613d 0/2 upstream: reported C repro on 2025/02/25 14:17
upstream KASAN: use-after-free Write in __run_timers 22 6144 3296d 3356d 3/29 fixed on 2017/11/11 01:37
android-54 KASAN: use-after-free Write in __run_timers 22 syz 449 851d 2303d 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 2080d 2087d 0/29 auto-closed as invalid on 2021/05/20 13:15
upstream KMSAN: uninit-value in __run_timers (3) net 7 syz, C error 4 1152d 1189d 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 610d 610d 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 273d 369d 0/29 auto-obsoleted due to no activity on 2026/05/01 08:57
upstream general protection fault in __run_timers (4) prio:high netfilter 2 1 93d 89d 0/29 auto-obsoleted due to no activity on 2026/10/28 15:26
android-54 KASAN: slab-out-of-bounds Write in __run_timers 21 4 1951d 2141d 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 885d 881d 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 ffff888115528a00 by task strace-static-x/303

CPU: 1 PID: 303 Comm: strace-static-x Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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+0x1dd/0x5f0 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:__sanitizer_cov_trace_switch+0xd6/0xe0 kernel/kcov.c:-1
Code: f3 48 c1 e3 05 4c 8d 63 28 4d 39 fc 77 9d 49 ff c6 4d 89 33 49 89 4c 1b 08 4d 89 54 1b 10 49 89 7c 1b 18 49 89 54 1b 20 eb 81 <5b> 41 5c 41 5e 41 5f 5d c3 90 90 90 90 90 90 90 90 90 90 90 90 b8
RSP: 0018:ffffc90000df7b50 EFLAGS: 00000246
RAX: 000000000000001b RBX: 00000000000102f9 RCX: 0000000000000007
RDX: ffffffff8144b4d8 RSI: ffffffff870f8930 RDI: 000000000000420e
RBP: ffffc90000df7b70 R08: ffff88810e58e540 R09: 000000000000001b
R10: 000000000000420e R11: 0000000000000000 R12: fffff520001bef7c
R13: 000000000000420e R14: 1ffff11021baecae R15: 0000000000010000
 ptrace_request+0x158/0x1ab0 kernel/ptrace.c:1050
 arch_ptrace+0x19b/0x220 arch/x86/kernel/ptrace.c:828
 __do_sys_ptrace kernel/ptrace.c:1306 [inline]
 __se_sys_ptrace+0x150/0x3c0 kernel/ptrace.c:1279
 __x64_sys_ptrace+0x9b/0xb0 kernel/ptrace.c:1279
 x64_sys_call+0xa6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:102
 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: 0033:0x4ebd9b
Code: 8d 44 24 70 41 83 f8 03 c7 44 24 10 08 00 00 00 48 89 44 24 18 48 8d 44 24 30 4c 0f 43 d1 48 89 44 24 20 b8 65 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3d 48 85 c0 78 06 41 83 f8 02 76 1a 48 8b 54
RSP: 002b:00007ffc191f7650 EFLAGS: 00000206 ORIG_RAX: 0000000000000065
RAX: ffffffffffffffda RBX: 000000003b336a90 RCX: 00000000004ebd9b
RDX: 0000000000000058 RSI: 0000000000000139 RDI: 000000000000420e
RBP: 00007ffc191f7770 R08: 000000000000420d R09: 0000000000000000
R10: 000000000069b3c0 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000676170 R14: 0000000000000018 R15: 000000003b33b850
 </TASK>

Allocated by task 441:
 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:1523 [inline]
 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:669 [inline]
 hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:754 [inline]
 hci_uart_tty_ioctl+0x3c4/0xa70 drivers/bluetooth/hci_ldisc.c:809
 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 445:
 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:1483 [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:1192
 sock_ioctl+0x475/0x700 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: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+0x642/0x740 net/bluetooth/hci_core.c:-1
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x114/0x330 net/socket.c:1192
 sock_ioctl+0x475/0x700 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: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+0x642/0x740 net/bluetooth/hci_core.c:-1
 hci_sock_ioctl+0x41e/0x7f0 net/bluetooth/hci_sock.c:1096
 sock_do_ioctl+0x114/0x330 net/socket.c:1192
 sock_ioctl+0x475/0x700 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: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 ffff888115528000
 which belongs to the cache kmalloc-8k of size 8192
The buggy address is located 2560 bytes inside of
 8192-byte region [ffff888115528000, ffff88811552a000)

The buggy address belongs to the physical page:
page:ffffea0004554a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x115528
head:ffffea0004554a00 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 440, tgid 440 (syz-executor257), ts 87203020003, free_ts 87125448842
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2673
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2680
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4587
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5931
 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:1523 [inline]
 hci_uart_register_dev drivers/bluetooth/hci_ldisc.c:669 [inline]
 hci_uart_set_proto drivers/bluetooth/hci_ldisc.c:754 [inline]
 hci_uart_tty_ioctl+0x3c4/0xa70 drivers/bluetooth/hci_ldisc.c:809
 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:1581 [inline]
 free_pcp_prepare mm/page_alloc.c:1655 [inline]
 free_unref_page_prepare+0x81b/0x820 mm/page_alloc.c:3622
 free_unref_page+0x93/0x530 mm/page_alloc.c:3720
 free_the_page mm/page_alloc.c:863 [inline]
 __free_pages+0x67/0x100 mm/page_alloc.c:6021
 __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]
 __kmem_cache_alloc_node+0x194/0x2d0 mm/slub.c:3423
 kmalloc_trace+0x29/0xb0 mm/slab_common.c:1028
 kmalloc include/linux/slab.h:563 [inline]
 tty_ldisc_get+0x24d/0x2b0 drivers/tty/tty_ldisc.c:166
 tty_set_ldisc+0x27/0x780 drivers/tty/tty_ldisc.c:525

Memory state around the buggy address:
 ffff888115528900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888115528980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888115528a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff888115528a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888115528b00: 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: 303 Comm: strace-static-x Tainted: G    B              syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:__queue_work+0x582/0xd50 kernel/workqueue.c:-1
Code: b4 00 00 00 e8 0f 5b 29 00 48 bb 00 00 00 00 00 fc ff df 4c 89 ef e8 2d fa b9 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 50 f6 6e 00 49 8b 3e e8 c8 f5 b9 03
RSP: 0018:ffffc900001b0c78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88810e58e540
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: 0000000000000007 R09: 00000000fffffffb
R10: dffffc0000000000 R11: ffffed1022aa5139 R12: ffff8881155289c8
R13: ffff888113c4f400 R14: 0000000000000000 R15: 000000007fffffff
FS:  000000003b334400(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010f7a5000 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+0x1dd/0x5f0 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:__sanitizer_cov_trace_switch+0xd6/0xe0 kernel/kcov.c:-1
Code: f3 48 c1 e3 05 4c 8d 63 28 4d 39 fc 77 9d 49 ff c6 4d 89 33 49 89 4c 1b 08 4d 89 54 1b 10 49 89 7c 1b 18 49 89 54 1b 20 eb 81 <5b> 41 5c 41 5e 41 5f 5d c3 90 90 90 90 90 90 90 90 90 90 90 90 b8
RSP: 0018:ffffc90000df7b50 EFLAGS: 00000246
RAX: 000000000000001b RBX: 00000000000102f9 RCX: 0000000000000007
RDX: ffffffff8144b4d8 RSI: ffffffff870f8930 RDI: 000000000000420e
RBP: ffffc90000df7b70 R08: ffff88810e58e540 R09: 000000000000001b
R10: 000000000000420e R11: 0000000000000000 R12: fffff520001bef7c
R13: 000000000000420e R14: 1ffff11021baecae R15: 0000000000010000
 ptrace_request+0x158/0x1ab0 kernel/ptrace.c:1050
 arch_ptrace+0x19b/0x220 arch/x86/kernel/ptrace.c:828
 __do_sys_ptrace kernel/ptrace.c:1306 [inline]
 __se_sys_ptrace+0x150/0x3c0 kernel/ptrace.c:1279
 __x64_sys_ptrace+0x9b/0xb0 kernel/ptrace.c:1279
 x64_sys_call+0xa6/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:102
 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: 0033:0x4ebd9b
Code: 8d 44 24 70 41 83 f8 03 c7 44 24 10 08 00 00 00 48 89 44 24 18 48 8d 44 24 30 4c 0f 43 d1 48 89 44 24 20 b8 65 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 3d 48 85 c0 78 06 41 83 f8 02 76 1a 48 8b 54
RSP: 002b:00007ffc191f7650 EFLAGS: 00000206 ORIG_RAX: 0000000000000065
RAX: ffffffffffffffda RBX: 000000003b336a90 RCX: 00000000004ebd9b
RDX: 0000000000000058 RSI: 0000000000000139 RDI: 000000000000420e
RBP: 00007ffc191f7770 R08: 000000000000420d R09: 0000000000000000
R10: 000000000069b3c0 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000676170 R14: 0000000000000018 R15: 000000003b33b850
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0x582/0xd50 kernel/workqueue.c:-1
Code: b4 00 00 00 e8 0f 5b 29 00 48 bb 00 00 00 00 00 fc ff df 4c 89 ef e8 2d fa b9 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 50 f6 6e 00 49 8b 3e e8 c8 f5 b9 03
RSP: 0018:ffffc900001b0c78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffff88810e58e540
RDX: 0000000000000100 RSI: 000000007fffffff RDI: 000000007fffffff
RBP: ffffc900001b0d08 R08: 0000000000000007 R09: 00000000fffffffb
R10: dffffc0000000000 R11: ffffed1022aa5139 R12: ffff8881155289c8
R13: ffff888113c4f400 R14: 0000000000000000 R15: 000000007fffffff
FS:  000000003b334400(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010f7a5000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f3 48 c1 e3 05       	repz shl $0x5,%rbx
   5:	4c 8d 63 28          	lea    0x28(%rbx),%r12
   9:	4d 39 fc             	cmp    %r15,%r12
   c:	77 9d                	ja     0xffffffab
   e:	49 ff c6             	inc    %r14
  11:	4d 89 33             	mov    %r14,(%r11)
  14:	49 89 4c 1b 08       	mov    %rcx,0x8(%r11,%rbx,1)
  19:	4d 89 54 1b 10       	mov    %r10,0x10(%r11,%rbx,1)
  1e:	49 89 7c 1b 18       	mov    %rdi,0x18(%r11,%rbx,1)
  23:	49 89 54 1b 20       	mov    %rdx,0x20(%r11,%rbx,1)
  28:	eb 81                	jmp    0xffffffab
* 2a:	5b                   	pop    %rbx <-- trapping instruction
  2b:	41 5c                	pop    %r12
  2d:	41 5e                	pop    %r14
  2f:	41 5f                	pop    %r15
  31:	5d                   	pop    %rbp
  32:	c3                   	ret
  33:	90                   	nop
  34:	90                   	nop
  35:	90                   	nop
  36:	90                   	nop
  37:	90                   	nop
  38:	90                   	nop
  39:	90                   	nop
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	b8                   	.byte 0xb8

Crashes (1155):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/26 09:32 android14-6.1 2f0d864181b9 1d9ca40b .config strace log report syz / log C [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
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
2026/10/28 11:21 android14-6.1 b83ca11f560a 858db2ec .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/28 08:15 android14-6.1 b83ca11f560a 96923c60 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/26 08:15 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/25 16:20 android14-6.1 2f0d864181b9 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/23 18:21 android14-6.1 09f3b59c7344 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/23 12:31 android14-6.1 09f3b59c7344 d566bfda .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/20 22:43 android14-6.1 bb5a6085be4a df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/18 14:56 android14-6.1 48e3cd973485 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/18 09:07 android14-6.1 48e3cd973485 432c0077 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/16 11:40 android14-6.1 b44b71789840 4c840a2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/14 04:35 android14-6.1 e3b8fb598ad4 7321cd29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/11 22:56 android14-6.1 9ea8d8374e5e 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/11 16:00 android14-6.1 9ea8d8374e5e 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/11 11:54 android14-6.1 9ea8d8374e5e 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/07 16:31 android14-6.1 3b0884642a50 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/07 10:25 android14-6.1 3b0884642a50 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/07 04:04 android14-6.1 3b0884642a50 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/06 13:19 android14-6.1 3b0884642a50 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/06 06:32 android14-6.1 3b0884642a50 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/06 01:14 android14-6.1 3b0884642a50 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/04 06:28 android14-6.1 6612ef9d0b09 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/03 12:47 android14-6.1 6612ef9d0b09 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/02 01:49 android14-6.1 6612ef9d0b09 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/10/01 00:05 android14-6.1 317cdf044ecb 38f7f0d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/30 16:56 android14-6.1 317cdf044ecb 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/30 12:31 android14-6.1 7a5c6f02c229 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/29 17:04 android14-6.1 3d4bd33f0b0b 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/29 14:22 android14-6.1 3d4bd33f0b0b 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/29 08:37 android14-6.1 3d4bd33f0b0b 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/28 16:12 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/27 11:16 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/25 15:38 android14-6.1 3d4bd33f0b0b f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/24 16:30 android14-6.1 d687308775e6 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/24 07:57 android14-6.1 23dbb5ded88c 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/23 16:04 android14-6.1 f26a1f4f9013 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/23 01:38 android14-6.1 688a2fe85528 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/22 20:10 android14-6.1 688a2fe85528 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/21 00:49 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/14 23:29 android14-6.1 f52fadf7c78f 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/14 08:58 android14-6.1 f52fadf7c78f 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/12 04:42 android14-6.1 6308d6d3f1b1 70a60e12 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/11 10:20 android14-6.1 b16e29e4979f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/11 10:03 android14-6.1 b16e29e4979f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/11 09:57 android14-6.1 b16e29e4979f 1fe56c0a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in __run_timers
2026/09/11 01:23 android14-6.1 b16e29e4979f 1fe56c0a .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.