vcan0: j1939_tp_rxtimer: 0xffff88807c053c00: rx timeout, send abort
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 0-...!: (1 ticks this GP) idle=7d8c/1/0x4000000000000000 softirq=138667/138667 fqs=0
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20111/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=154813, q=298 ncpus=2)
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25765 Comm: syz.8.5789 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__lock_acquire+0x6db/0x2cf0 kernel/locking/lockdep.c:5210
Code: 5b 44 00 00 31 ed 85 c0 0f 84 6d 0d 00 00 83 3d 0a 14 a3 18 00 75 13 48 63 44 24 18 48 0f a3 05 1b 84 9f 12 0f 83 8a 1e 00 00 <49> 8b 9e 80 0b 00 00 48 83 7c 24 28 00 75 19 83 3d df 13 a3 18 00
RSP: 0018:ffffc90000007b40 EFLAGS: 00000047
RAX: 0000000000000000 RBX: ffff888027bec980 RCX: ffffffff93e24370
RDX: 0000000000000008 RSI: ffff888027bec960 RDI: ffff888027bebd80
RBP: 0000000000000000 R08: ffffffff84bcd5e3 R09: ffffffff9a717968
R10: dffffc0000000000 R11: fffff52000000fac R12: 0000000000000002
R13: ffff888027bec960 R14: ffff888027bebd80 R15: 0000000000000002
FS: 00007f21f7af36c0(0000) GS:ffff888125289000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f21f7af2ff8 CR3: 000000005cfce000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:166
debug_object_activate+0x83/0x580 lib/debugobjects.c:835
debug_hrtimer_activate kernel/time/hrtimer.c:485 [inline]
debug_activate kernel/time/hrtimer.c:528 [inline]
enqueue_hrtimer+0xa9/0x2c0 kernel/time/hrtimer.c:1109
__run_hrtimer kernel/time/hrtimer.c:1946 [inline]
__hrtimer_run_queues+0x4d2/0xa20 kernel/time/hrtimer.c:1994
hrtimer_interrupt+0x44b/0x950 kernel/time/hrtimer.c:2113
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
__sysvec_apic_timer_interrupt+0x102/0x430 arch/x86/kernel/apic/apic.c:1067
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1061
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:179 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x47/0x80 kernel/locking/spinlock.c:198
Code: f7 e8 2d 8b f6 f5 f7 c3 00 02 00 00 74 05 e8 f0 1f 22 f6 9c 58 a9 00 02 00 00 75 27 f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 e4 09 e8 f5 65 8b 05 0d a0 8d 07 85 c0 74 18 5b 41 5e e9 dc 70
RSP: 0018:ffffc9000f0a7610 EFLAGS: 00000206
RAX: 0000000000000006 RBX: 0000000000000212 RCX: 0000000080000001
RDX: 0000000000000006 RSI: ffffffff8dfac14f RDI: 0000000000000001
RBP: ffff88806ae23780 R08: ffffffff9030ccf7 R09: 1ffffffff206199e
R10: dffffc0000000000 R11: fffffbfff206199f R12: dffffc0000000000
R13: 1ffff1100416b24d R14: ffff888020b59200 R15: 0000000000000212
spin_unlock_irqrestore include/linux/spinlock.h:408 [inline]
__skb_try_recv_datagram+0x17c/0x4d0 net/core/datagram.c:267
__unix_dgram_recvmsg+0x2e3/0xd60 net/unix/af_unix.c:2587
sock_recvmsg_nosec+0x10c/0x140 net/socket.c:1137
____sys_recvmsg+0x3e3/0x4a0 net/socket.c:2916
___sys_recvmsg+0x215/0x590 net/socket.c:2960
do_recvmmsg+0x334/0x800 net/socket.c:3055
__sys_recvmmsg net/socket.c:3129 [inline]
__do_sys_recvmmsg net/socket.c:3152 [inline]
__se_sys_recvmmsg net/socket.c:3145 [inline]
__x64_sys_recvmmsg+0x198/0x250 net/socket.c:3145
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21f6b9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f21f7af3028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f21f6e16090 RCX: 00007f21f6b9ce59
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000003
RBP: 00007f21f6c32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21f6e16128 R14: 00007f21f6e16090 R15: 00007ffee8c09318
task:syz-executor state:R running task stack:22424 pid:20111 tgid:20111 ppid:20100 task_flags:0x400140 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7513
irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline]
irqentry_exit+0x14f/0x760 kernel/entry/common.c:164
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__rcu_read_unlock+0x0/0xe0 kernel/rcu/tree_plugin.h:431
Code: d9 80 e1 07 80 c1 03 38 c1 7c dc 48 89 df e8 17 6f 85 00 eb d2 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 57 41 56 41 55 41 54 53 49 bf 00 00 00 00 00 fc ff
RSP: 0018:ffffc90004e86b10 EFLAGS: 00000282
RAX: 26c454527ea12b00 RBX: ffffffff90d1fb01 RCX: 0000000000000046
RDX: 0000000000000001 RSI: ffffffff8e21f706 RDI: ffffffff8c28b660
RBP: dffffc0000000000 R08: ffffc90004e87318 R09: ffffc90004e86c38
R10: dffffc0000000000 R11: fffff520009d0d89 R12: ffffc90004e87328
R13: ffffc90004e80000 R14: ffffc90004e86be8 R15: ffffffff8176f256
rcu_read_unlock include/linux/rcupdate.h:871 [inline]
class_rcu_destructor include/linux/rcupdate.h:1181 [inline]
unwind_next_frame+0x1bbf/0x2550 arch/x86/kernel/unwind_orc.c:709
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
save_stack+0x122/0x230 mm/page_owner.c:165
__set_page_owner+0x8d/0x4c0 mm/page_owner.c:341
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1858
prep_new_page mm/page_alloc.c:1866 [inline]
get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946
__alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226
__alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5260
alloc_pages_bulk_noprof+0x5ff/0x7c0 mm/page_alloc.c:5180
___alloc_pages_bulk mm/kasan/shadow.c:345 [inline]
__kasan_populate_vmalloc_do mm/kasan/shadow.c:370 [inline]
__kasan_populate_vmalloc+0xc1/0x1d0 mm/kasan/shadow.c:424
kasan_populate_vmalloc include/linux/kasan.h:580 [inline]
alloc_vmap_area+0xd47/0x1480 mm/vmalloc.c:2123
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3226
__vmalloc_node_range_noprof+0x36a/0x1750 mm/vmalloc.c:4024
__vmalloc_node_noprof mm/vmalloc.c:4124 [inline]
vzalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4202
alloc_counters+0x64/0x5d0 net/ipv4/netfilter/ip_tables.c:799
copy_entries_to_user net/ipv4/netfilter/ip_tables.c:821 [inline]
get_entries net/ipv4/netfilter/ip_tables.c:1022 [inline]
do_ipt_get_ctl+0xada/0x1240 net/ipv4/netfilter/ip_tables.c:1668
nf_getsockopt+0x26e/0x290 net/netfilter/nf_sockopt.c:116
ip_getsockopt+0x19e/0x230 net/ipv4/ip_sockglue.c:1777
do_sock_getsockopt+0x51d/0x7e0 net/socket.c:2487
__sys_getsockopt net/socket.c:2518 [inline]
__do_sys_getsockopt net/socket.c:2525 [inline]
__se_sys_getsockopt net/socket.c:2522 [inline]
__x64_sys_getsockopt+0x1a4/0x240 net/socket.c:2522
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f103919e62a
RSP: 002b:00007ffeef84d198 EFLAGS: 00000216 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007ffeef84d220 RCX: 00007f103919e62a
RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007ffeef84d1bc R09: 0000000000000000
R10: 00007ffeef84d220 R11: 0000000000000216 R12: 00007f10393eafc0
R13: 00007ffeef84d1bc R14: 0000000000000000 R15: 00007f10393ed180
rcu: rcu_preempt kthread starved for 10502 jiffies! g154813 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:R running task stack:27536 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5388 [inline]
__schedule+0x1821/0x5740 kernel/sched/core.c:7189
__schedule_loop kernel/sched/core.c:7268 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7283
schedule_timeout+0x158/0x2c0 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x312/0x11d0 kernel/rcu/tree.c:2095
rcu_gp_kthread+0x9e/0x2b0 kernel/rcu/tree.c:2297
kthread+0x389/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
CPU: 1 UID: 0 PID: 25768 Comm: syz.8.5789 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline]
RIP: 0010:smp_call_function_many_cond+0xfcf/0x13d0 kernel/smp.c:892
Code: 79 45 8b 2e 44 89 ee 83 e6 01 31 ff e8 7a 06 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 25 02 0c 00 eb 37 f3 90 <43> 0f b6 04 2c 84 c0 75 10 41 f7 06 01 00 00 00 74 1e e8 0a 02 0c
RSP: 0018:ffffc9000eec7980 EFLAGS: 00000246
RAX: ffffffff81b9c286 RBX: ffff8880b873c148 RCX: 0000000000080000
RDX: ffffc900111f8000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc9000eec7ab0 R08: ffffffff9030ccf7 R09: 1ffffffff206199e
R10: dffffc0000000000 R11: ffffffff81746300 R12: 1ffff110170c8589
R13: dffffc0000000000 R14: ffff8880b8642c48 R15: 0000000000000000
FS: 00007f21f7ad26c0(0000) GS:ffff888125389000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c41ac7a CR3: 000000005cfce000 CR4: 0000000000350ef0
Call Trace:
clock_was_set+0x70a/0x7d0 kernel/time/hrtimer.c:999
do_adjtimex+0x25d/0x370 kernel/time/timekeeping.c:2924
do_clock_adjtime kernel/time/posix-timers.c:1154 [inline]
__do_sys_clock_adjtime kernel/time/posix-timers.c:1166 [inline]
__se_sys_clock_adjtime kernel/time/posix-timers.c:1157 [inline]
__x64_sys_clock_adjtime+0x252/0x340 kernel/time/posix-timers.c:1157
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21f6b9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f21f7ad2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000131
RAX: ffffffffffffffda RBX: 00007f21f6e16180 RCX: 00007f21f6b9ce59
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007f21f6c32d6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21f6e16218 R14: 00007f21f6e16180 R15: 00007ffee8c09318