watchdog: BUG: soft lockup - CPU#0 stuck for 123s! [kworker/0:10:17481]
Modules linked in:
irq event stamp: 0
hardirqs last  enabled at (0): [<0000000000000000>] 0x0
hardirqs last disabled at (0): [<ffffffff8143deb6>] copy_process+0x1a46/0x7110 kernel/fork.c:2028
softirqs last  enabled at (0): [<ffffffff8143df57>] copy_process+0x1ae7/0x7110 kernel/fork.c:2031
softirqs last disabled at (0): [<0000000000000000>] 0x0
CPU: 0 PID: 17481 Comm: kworker/0:10 Not tainted 5.7.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events fqdir_work_fn
RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline]
RIP: 0010:csd_lock_wait kernel/smp.c:109 [inline]
RIP: 0010:smp_call_function_single+0x188/0x480 kernel/smp.c:311
Code: 00 e8 bc d1 0a 00 48 8b 4c 24 08 48 8b 54 24 10 48 8d 74 24 40 8b 7c 24 1c e8 d4 f9 ff ff 41 89 c5 eb 07 e8 9a d1 0a 00 f3 90 <44> 8b 64 24 58 31 ff 41 83 e4 01 44 89 e6 e8 f5 d2 0a 00 45 85 e4
RSP: 0018:ffffc90002027be0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13
RAX: ffff8880401600c0 RBX: 1ffff92000404f80 RCX: ffffffff8168650b
RDX: 0000000000000000 RSI: ffffffff816864f6 RDI: 0000000000000005
RBP: ffffc90002027ca8 R08: ffff8880401600c0 R09: ffffed1015ce7121
R10: ffff8880ae738907 R11: ffffed1015ce7120 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8a8991c0
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000008049e60 CR3: 000000005f050000 CR4: 00000000001426f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 rcu_barrier+0x29c/0x4b0 kernel/rcu/tree.c:3371
 fqdir_work_fn+0x5d/0xf0 net/ipv4/inet_fragment.c:159
 process_one_work+0x965/0x16a0 kernel/workqueue.c:2268
 worker_thread+0x96/0xe20 kernel/workqueue.c:2414
 kthread+0x388/0x470 kernel/kthread.c:268
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_halt+0xd/0x10 arch/x86/include/asm/irqflags.h:66