worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#0 stuck for 246s! [kworker/0:2:60]
Modules linked in:
CPU: 0 PID: 60 Comm: kworker/0:2 Tainted: G W 5.15.148-syzkaller-00013-gad06eaf051cd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: events bpf_map_free_deferred
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_single+0x278/0x510 kernel/smp.c:758
Code: 0f 85 18 02 00 00 44 8b 6c 24 48 44 89 ee 83 e6 01 31 ff e8 0a ba 0a 00 41 83 e5 01 75 0a e8 4f b6 0a 00 e9 eb 00 00 00 f3 90 <42> 0f b6 04 23 84 c0 75 15 f7 44 24 48 01 00 00 00 0f 84 cd 00 00
RSP: 0018:ffffc90000907b00 EFLAGS: 00000293
RAX: ffffffff81656c04 RBX: 1ffff92000120f69 RCX: ffff88810b16cf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000907bf0 R08: ffffffff81656bd6 R09: ffffed103ee27059
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffc90000907b48 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff34668a6c6 CR3: 0000000126575000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_barrier+0x218/0x400 kernel/rcu/tree.c:4078
htab_map_free+0x28/0x5d0 kernel/bpf/hashtab.c:1466
bpf_map_free_deferred+0x10d/0x1e0 kernel/bpf/syscall.c:481
process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325
worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472
kthread+0x421/0x510 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 351 Comm: syz-fuzzer Tainted: G W 5.15.148-syzkaller-00013-gad06eaf051cd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline]
RIP: 0010:kvm_wait+0x117/0x180 arch/x86/kernel/kvm.c:912
Code: 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b 74 24 1c 75 53 41 0f b6 45 00 44 38 f0 0f 85 63 ff ff ff 66 90 0f 00 2d 8a 03 f3 03 f4 54 ff ff ff fa 4c 89 e8 48 c1 e8 03 42 0f b6 04 20 84 c0 44 8b
RSP: 0018:ffffc900001d0600 EFLAGS: 00000046
RAX: 0000000000000003 RBX: 1ffff9200003a0c4 RCX: ffffffff8154f88f
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff88810cc75780
RBP: ffffc900001d06b0 R08: dffffc0000000000 R09: ffffed102198eaf1
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88810cc75780 R14: 0000000000000003 R15: 1ffff9200003a0c8
FS: 000000c000ec9890(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff3447a5fa8 CR3: 000000011bbdb000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
__pv_queued_spin_lock_slowpath+0x6bc/0xc40 kernel/locking/qspinlock.c:508
pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:51 [inline]
queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
do_raw_spin_lock_flags include/linux/spinlock.h:199 [inline]
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irqsave+0x1a0/0x210 kernel/locking/spinlock.c:162
__lock_task_sighand kernel/signal.c:1413 [inline]
lock_task_sighand include/linux/sched/signal.h:710 [inline]
do_send_sig_info+0x7e/0x230 kernel/signal.c:1302
group_send_sig_info+0x113/0x460 kernel/signal.c:1451
bpf_send_signal_common+0x2d8/0x420 kernel/trace/bpf_trace.c:827
____bpf_send_signal kernel/trace/bpf_trace.c:832 [inline]
bpf_send_signal+0x19/0x20 kernel/trace/bpf_trace.c:830
bpf_prog_8cc4ff36b5985b6a+0x15/0x630
bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
__bpf_prog_run include/linux/filter.h:625 [inline]
bpf_prog_run include/linux/filter.h:632 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
bpf_trace_run3+0x11e/0x250 kernel/trace/bpf_trace.c:1921
__bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
__traceiter_kmem_cache_free+0x32/0x50 include/trace/events/kmem.h:138
trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
kmem_cache_free+0x2c3/0x2e0 mm/slub.c:3536
__d_free+0x23/0x30 fs/dcache.c:273
rcu_do_batch+0x57a/0xc10 kernel/rcu/tree.c:2523
rcu_core+0x517/0x1020 kernel/rcu/tree.c:2763
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776
__do_softirq+0x26d/0x5bf kernel/softirq.c:565
do_softirq+0xf6/0x150 kernel/softirq.c:452
__local_bh_enable_ip+0x75/0x80 kernel/softirq.c:379
__raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline]
_raw_spin_unlock_bh+0x51/0x60 kernel/locking/spinlock.c:210
sock_hash_delete_elem+0x2a2/0x2f0 net/core/sock_map.c:945
bpf_prog_2c29ac5cdc6b1842+0x3a/0xb38
bpf_dispatcher_nop_func include/linux/bpf.h:785 [inline]
__bpf_prog_run include/linux/filter.h:625 [inline]
bpf_prog_run include/linux/filter.h:632 [inline]
__bpf_trace_run kernel/trace/bpf_trace.c:1883 [inline]
bpf_trace_run3+0x11e/0x250 kernel/trace/bpf_trace.c:1921
__bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:138
__traceiter_kmem_cache_free+0x32/0x50 include/trace/events/kmem.h:138
trace_kmem_cache_free include/trace/events/kmem.h:138 [inline]
kmem_cache_free+0x2c3/0x2e0 mm/slub.c:3536
__sigqueue_free kernel/signal.c:462 [inline]
collect_signal kernel/signal.c:601 [inline]
__dequeue_signal+0x4f8/0x600 kernel/signal.c:623
dequeue_signal+0x10c/0x520 kernel/signal.c:643
get_signal+0x7cf/0x1630 kernel/signal.c:2777
arch_do_signal_or_restart+0xbd/0x1680 arch/x86/kernel/signal.c:867
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0xa0/0xe0 kernel/entry/common.c:172
exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x26/0x160 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x40720e
Code: 48 83 ec 38 e8 13 00 00 00 48 83 c4 38 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
RSP: 002b:000000c000ec5d08 EFLAGS: 00000202 ORIG_RAX: 00000000000000f7
RAX: fffffffffffffe00 RBX: 0000000000000001 RCX: 000000000040720e
RDX: 000000c000ec5e18 RSI: 00000000000012fd RDI: 0000000000000001
RBP: 000000c000ec5d48 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000001000004 R11: 0000000000000202 R12: 000000c000ec5e60
R13: 000000c0008bd9a4 R14: 000000c000890820 R15: 0000000000000000