WARNING in init_timer_key

Status: upstream: reported C repro on 2025/01/11 14:11
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+19ad7367f6c33263d0d0@syzkaller.appspotmail.com
First crash: 569d, last: 191d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2025/01/11 linux-5.15.y (ToT) 4735586da88e C [report] WARNING in init_timer_key
2025/01/11 upstream (ToT) 77a903cd8e5a C Didn't crash
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in init_timer_key wireless -1 syz, C done 2 1898d 2004d 20/29 fixed on 2021/11/10 00:50
upstream WARNING in init_timer_key (2) batman -1 1 1367d 1367d 0/29 closed as invalid on 2023/02/17 17:35
linux-6.1 WARNING in init_timer_key origin:lts-only -1 syz, C inconclusive 10 192d 646d 0/3 upstream: reported C repro on 2024/10/26 17:15
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2026/06/14 10:32 37m retest repro linux-5.15.y report log
2026/06/14 10:32 24m retest repro linux-5.15.y report log
2026/05/20 13:04 25m retest repro linux-5.15.y report log
2026/04/05 04:26 24m retest repro linux-5.15.y OK log
2026/04/04 20:41 22m retest repro linux-5.15.y report log
2026/04/04 20:41 30m retest repro linux-5.15.y OK log
2026/04/04 20:41 19m retest repro linux-5.15.y report log
2026/03/09 15:29 19m retest repro linux-5.15.y OK log
2026/03/09 15:18 18m retest repro linux-5.15.y OK log
2026/02/22 00:25 15m retest repro linux-5.15.y report log
▶ ▼ Fix bisection attempts (6)
Created Duration User Patch Repo Result
2026/05/30 01:12 16m fix candidate upstream error job log
2026/03/28 07:51 1m fix candidate upstream error job log
2026/02/24 20:44 1m fix candidate upstream error job log
2026/01/25 07:02 1m fix candidate upstream error job log
2025/09/22 07:13 1m fix candidate upstream error job log
2025/03/14 02:55 1m bisect fix linux-5.15.y error job log

Sample crash report:
------------[ cut here ]------------
ODEBUG: init active (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 0 PID: 5445 at lib/debugobjects.c:521 debug_print_object lib/debugobjects.c:518 [inline]
WARNING: CPU: 0 PID: 5445 at lib/debugobjects.c:521 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
Modules linked in:
CPU: 0 PID: 5445 Comm: syz-executor157 Not tainted 5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:518 [inline]
pc : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
lr : debug_print_object lib/debugobjects.c:518 [inline]
lr : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
sp : ffff800020356ec0
x29: ffff800020357070 x28: dfff800000000000 x27: ffff0000c93d1c98
x26: ffff0000cda5da38 x25: 0000000000000000 x24: ffff800011cb2ee0
x23: ffff800012156540 x22: 0000000000000000 x21: 0000000000000003
x20: ffff0000cda5da38 x19: ffff80001bae2000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff800011b4c240 x15: 00000000ffffffff
x14: ffff0000cfa2d1c0 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 66ba53c3812fe300
x8 : 66ba53c3812fe300 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020356638 x4 : ffff800014c40660 x3 : ffff8000085567f8
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000046
Call trace:
 debug_print_object lib/debugobjects.c:518 [inline]
 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 debug_timer_init kernel/time/timer.c:724 [inline]
 debug_init kernel/time/timer.c:772 [inline]
 init_timer_key+0x54/0x468 kernel/time/timer.c:816
 ieee80211_ibss_setup_sdata+0x48/0x158 net/mac80211/ibss.c:1736
 ieee80211_setup_sdata+0x628/0xbb4 net/mac80211/iface.c:1623
 ieee80211_runtime_change_iftype net/mac80211/iface.c:1732 [inline]
 ieee80211_if_change_type+0x770/0xc68 net/mac80211/iface.c:1754
 ieee80211_change_iface+0x6c/0x3a0 net/mac80211/cfg.c:160
 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
 cfg80211_change_iface+0x778/0x143c net/wireless/util.c:1074
 nl80211_set_interface+0x404/0x710 net/wireless/nl80211.c:3953
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xc18/0x1018 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 16674
hardirqs last  enabled at (16673): [<ffff80000832c1a4>] __up_console_sem+0xb4/0x100 kernel/printk/printk.c:257
hardirqs last disabled at (16674): [<ffff800011b478f4>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (16590): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (16590): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (16549): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (16549): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (16549): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (16549): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 635172b17681894e ]---
INFO: trying to register non-static key.
The code is fine but needs lockdep annotation, or maybe
you didn't initialize this object before use?
turning off the locking correctness validator.
CPU: 0 PID: 5445 Comm: syz-executor157 Tainted: G        W         5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 assign_lock_key+0x1e4/0x1f0 kernel/locking/lockdep.c:937
 register_lock_class+0x148/0x6a4 kernel/locking/lockdep.c:1250
 __lock_acquire+0x184/0x7638 kernel/locking/lockdep.c:4891
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 timer_delete_sync+0x9c/0x210 kernel/time/timer.c:1395
 del_timer_sync include/linux/timer.h:198 [inline]
 timer_fixup_init+0x3c/0x6c kernel/time/timer.c:641
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 debug_timer_init kernel/time/timer.c:724 [inline]
 debug_init kernel/time/timer.c:772 [inline]
 init_timer_key+0x54/0x468 kernel/time/timer.c:816
 ieee80211_ibss_setup_sdata+0x48/0x158 net/mac80211/ibss.c:1736
 ieee80211_setup_sdata+0x628/0xbb4 net/mac80211/iface.c:1623
 ieee80211_runtime_change_iftype net/mac80211/iface.c:1732 [inline]
 ieee80211_if_change_type+0x770/0xc68 net/mac80211/iface.c:1754
 ieee80211_change_iface+0x6c/0x3a0 net/mac80211/cfg.c:160
 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
 cfg80211_change_iface+0x778/0x143c net/wireless/util.c:1074
 nl80211_set_interface+0x404/0x710 net/wireless/nl80211.c:3953
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xc18/0x1018 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
------------[ cut here ]------------
ODEBUG: init active (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 0 PID: 5445 at lib/debugobjects.c:521 debug_print_object lib/debugobjects.c:518 [inline]
WARNING: CPU: 0 PID: 5445 at lib/debugobjects.c:521 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
Modules linked in:
CPU: 0 PID: 5445 Comm: syz-executor157 Tainted: G        W         5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:518 [inline]
pc : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
lr : debug_print_object lib/debugobjects.c:518 [inline]
lr : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
sp : ffff800020356c80
x29: ffff800020356e30 x28: dfff800000000000 x27: ffff0000c93d1c98
x26: ffff0000cda5da38 x25: 0000000000000000 x24: ffff800011cb2ee0
x23: ffff800012156540 x22: 0000000000000000 x21: 0000000000000003
x20: ffff0000cda5da38 x19: ffff80001bae2000 x18: 1fffe0003682ef8e
x17: 1fffe0003682ef8e x16: ffff800011b4c240 x15: ffff800014bffac0
x14: ffff0001b4177c80 x13: ffff0001b4177c7c x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 66ba53c3812fe300
x8 : 66ba53c3812fe300 x7 : 0000000000000000 x6 : ffff80000826abdc
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000085567f8
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000046
Call trace:
 debug_print_object lib/debugobjects.c:518 [inline]
 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 debug_timer_init kernel/time/timer.c:724 [inline]
 debug_init kernel/time/timer.c:772 [inline]
 init_timer_key+0x54/0x468 kernel/time/timer.c:816
 ieee80211_ibss_setup_sdata+0x48/0x158 net/mac80211/ibss.c:1736
 ieee80211_setup_sdata+0x628/0xbb4 net/mac80211/iface.c:1623
 ieee80211_runtime_change_iftype net/mac80211/iface.c:1732 [inline]
 ieee80211_if_change_type+0x770/0xc68 net/mac80211/iface.c:1754
 ieee80211_change_iface+0x6c/0x3a0 net/mac80211/cfg.c:160
 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
 cfg80211_change_iface+0x778/0x143c net/wireless/util.c:1074
 nl80211_set_interface+0x404/0x710 net/wireless/nl80211.c:3953
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xc18/0x1018 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 16784
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (16784): [<ffff8000083b9d30>] timer_delete_sync+0x70/0x210 kernel/time/timer.c:1394
softirqs last  enabled at (16778): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (16778): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 635172b17681894f ]---
------------[ cut here ]------------
ODEBUG: init active (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 1 PID: 5445 at lib/debugobjects.c:521 debug_print_object lib/debugobjects.c:518 [inline]
WARNING: CPU: 1 PID: 5445 at lib/debugobjects.c:521 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
Modules linked in:
CPU: 1 PID: 5445 Comm: syz-executor157 Tainted: G        W         5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:518 [inline]
pc : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
lr : debug_print_object lib/debugobjects.c:518 [inline]
lr : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
sp : ffff800020356a40
x29: ffff800020356bf0 x28: dfff800000000000 x27: ffff0000c93d1c98
x26: ffff0000cda5da38 x25: 0000000000000000 x24: ffff800011cb2ee0
x23: ffff800012156540 x22: 0000000000000000 x21: 0000000000000003
x20: ffff0000cda5da38 x19: ffff80001bae2000 x18: 1fffe0003683318e
x17: 1fffe0003683318e x16: ffff800011b4c240 x15: ffff800014bffac0
x14: ffff0001b4198c80 x13: ffff0001b4198c7c x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 66ba53c3812fe300
x8 : 66ba53c3812fe300 x7 : 0000000000000000 x6 : ffff80000826abdc
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000aa0ec9c
x2 : ffff0001b4198d10 x1 : 0000000100000000 x0 : 0000000000000046
Call trace:
 debug_print_object lib/debugobjects.c:518 [inline]
 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 debug_timer_init kernel/time/timer.c:724 [inline]
 debug_init kernel/time/timer.c:772 [inline]
 init_timer_key+0x54/0x468 kernel/time/timer.c:816
 ieee80211_ibss_setup_sdata+0x48/0x158 net/mac80211/ibss.c:1736
 ieee80211_setup_sdata+0x628/0xbb4 net/mac80211/iface.c:1623
 ieee80211_runtime_change_iftype net/mac80211/iface.c:1732 [inline]
 ieee80211_if_change_type+0x770/0xc68 net/mac80211/iface.c:1754
 ieee80211_change_iface+0x6c/0x3a0 net/mac80211/cfg.c:160
 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
 cfg80211_change_iface+0x778/0x143c net/wireless/util.c:1074
 nl80211_set_interface+0x404/0x710 net/wireless/nl80211.c:3953
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xc18/0x1018 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 16784
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (16784): [<ffff8000083b9d30>] timer_delete_sync+0x70/0x210 kernel/time/timer.c:1394
softirqs last  enabled at (16778): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (16778): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 635172b176818950 ]---
------------[ cut here ]------------
ODEBUG: init active (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 1 PID: 5445 at lib/debugobjects.c:521 debug_print_object lib/debugobjects.c:518 [inline]
WARNING: CPU: 1 PID: 5445 at lib/debugobjects.c:521 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
Modules linked in:
CPU: 1 PID: 5445 Comm: syz-executor157 Tainted: G        W         5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:518 [inline]
pc : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
lr : debug_print_object lib/debugobjects.c:518 [inline]
lr : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
sp : ffff800020356800
x29: ffff8000203569b0 x28: dfff800000000000 x27: ffff0000c93d1c98
x26: ffff0000cda5da38 x25: 0000000000000000 x24: ffff800011cb2ee0
x23: ffff800012156540 x22: 0000000000000000 x21: 0000000000000003
x20: ffff0000cda5da38 x19: ffff80001bae2000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff800011b4c240 x15: 00000000ffffffff
x14: ffff0000cfa2d1c0 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 66ba53c3812fe300
x8 : 66ba53c3812fe300 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020355f78 x4 : ffff800014c40660 x3 : ffff8000085567f8
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000046
Call trace:
 debug_print_object lib/debugobjects.c:518 [inline]
 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 debug_timer_init kernel/time/timer.c:724 [inline]
 debug_init kernel/time/timer.c:772 [inline]
 init_timer_key+0x54/0x468 kernel/time/timer.c:816
 ieee80211_ibss_setup_sdata+0x48/0x158 net/mac80211/ibss.c:1736
 ieee80211_setup_sdata+0x628/0xbb4 net/mac80211/iface.c:1623
 ieee80211_runtime_change_iftype net/mac80211/iface.c:1732 [inline]
 ieee80211_if_change_type+0x770/0xc68 net/mac80211/iface.c:1754
 ieee80211_change_iface+0x6c/0x3a0 net/mac80211/cfg.c:160
 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
 cfg80211_change_iface+0x778/0x143c net/wireless/util.c:1074
 nl80211_set_interface+0x404/0x710 net/wireless/nl80211.c:3953
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xc18/0x1018 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 16784
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (16784): [<ffff8000083b9d30>] timer_delete_sync+0x70/0x210 kernel/time/timer.c:1394
softirqs last  enabled at (16778): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (16778): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 635172b176818951 ]---
------------[ cut here ]------------
ODEBUG: init active (active state 0) object type: timer_list hint: 0x0
WARNING: CPU: 1 PID: 5445 at lib/debugobjects.c:521 debug_print_object lib/debugobjects.c:518 [inline]
WARNING: CPU: 1 PID: 5445 at lib/debugobjects.c:521 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
Modules linked in:
CPU: 1 PID: 5445 Comm: syz-executor157 Tainted: G        W         5.15.176-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : debug_print_object lib/debugobjects.c:518 [inline]
pc : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
lr : debug_print_object lib/debugobjects.c:518 [inline]
lr : __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
sp : ffff8000203565c0
x29: ffff800020356770 x28: dfff800000000000 x27: ffff0000c93d1c98
x26: ffff0000cda5da38 x25: 0000000000000000 x24: ffff800011cb2ee0
x23: ffff800012156540 x22: 0000000000000000 x21: 0000000000000003
x20: ffff0000cda5da38 x19: ffff80001bae2000 x18: 0000000000000001
x17: 0000000000000000 x16: ffff800008336558 x15: 00000000ffffffff
x14: ffff0000cfa2d1c0 x13: 0000000000000001 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 66ba53c3812fe300
x8 : 66ba53c3812fe300 x7 : 0000000000000001 x6 : 0000000000000001
x5 : ffff800020355d38 x4 : ffff800014c40660 x3 : ffff8000083366a4
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000046
Call trace:
 debug_print_object lib/debugobjects.c:518 [inline]
 __debug_object_init+0x33c/0xbe8 lib/debugobjects.c:641
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 timer_fixup_init+0x4c/0x6c kernel/time/timer.c:642
 debug_object_fixup lib/debugobjects.c:534 [inline]
 __debug_object_init+0x388/0xbe8 lib/debugobjects.c:644
 debug_object_init+0x20/0x2c lib/debugobjects.c:657
 debug_timer_init kernel/time/timer.c:724 [inline]
 debug_init kernel/time/timer.c:772 [inline]
 init_timer_key+0x54/0x468 kernel/time/timer.c:816
 ieee80211_ibss_setup_sdata+0x48/0x158 net/mac80211/ibss.c:1736
 ieee80211_setup_sdata+0x628/0xbb4 net/mac80211/iface.c:1623
 ieee80211_runtime_change_iftype net/mac80211/iface.c:1732 [inline]
 ieee80211_if_change_type+0x770/0xc68 net/mac80211/iface.c:1754
 ieee80211_change_iface+0x6c/0x3a0 net/mac80211/cfg.c:160
 rdev_change_virtual_intf net/wireless/rdev-ops.h:69 [inline]
 cfg80211_change_iface+0x778/0x143c net/wireless/util.c:1074
 nl80211_set_interface+0x404/0x710 net/wireless/nl80211.c:3953
 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline]
 genl_rcv_msg+0xc18/0x1018 net/netlink/genetlink.c:792
 netlink_rcv_skb+0x20c/0x3b8 net/netlink/af_netlink.c:2489
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:803
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x664/0x938 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x844/0xb38 net/netlink/af_netlink.c:1905
 sock_sendmsg_nosec net/socket.c:704 [inline]
 __sock_sendmsg net/socket.c:716 [inline]
 __sys_sendto+0x388/0x4d0 net/socket.c:2063
 __do_sys_sendto net/socket.c:2075 [inline]
 __se_sys_sendto net/socket.c:2071 [inline]
 __arm64_sys_sendto+0xd8/0xf8 net/socket.c:2071
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 16784
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:81 [inline]
hardirqs last  enabled at (16783): [<ffff800011b4a6fc>] exit_to_kernel_mode+0x100/0x178 arch/arm64/kernel/entry-common.c:91
hardirqs last disabled at (16784): [<ffff8000083b9d30>] timer_delete_sync+0x70/0x210 kernel/time/timer.c:1394
softirqs last  enabled at (16778): [<ffff8000081b691c>] softirq_handle_end kernel/softirq.c:401 [inline]
softirqs last  enabled at (16778): [<ffff8000081b691c>] handle_softirqs+0xb88/0xdbc kernel/softirq.c:586
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __do_softirq kernel/softirq.c:592 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] do_softirq_own_stack include/asm-generic/softirq_stack.h:10 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] invoke_softirq kernel/softirq.c:439 [inline]
softirqs last disabled at (16677): [<ffff8000081b6fb4>] __irq_exit_rcu+0x268/0x4d8 kernel/softirq.c:641
---[ end trace 635172b176818952 ]---

Crashes (18):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/01/12 16:14 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/11 23:03 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/11 18:18 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/04/18 01:37 linux-5.15.y f7347f400572 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in init_timer_key
2025/06/10 00:13 linux-5.15.y 1c700860e8bc 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/05/31 07:09 linux-5.15.y 98f47d0e9b8c 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/05/27 18:00 linux-5.15.y 98f47d0e9b8c 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/04/24 16:19 linux-5.15.y f7347f400572 9882047a .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/04/24 11:23 linux-5.15.y f7347f400572 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/13 03:45 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 23:47 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 18:04 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 14:15 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 10:10 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 08:27 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 06:04 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/12 01:07 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
2025/01/11 14:10 linux-5.15.y 4735586da88e 6dbc6a9b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in init_timer_key
* Struck through repros no longer work on HEAD.