INFO: task kworker/u8:2:5739 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:2    state:D stack:21928 pid:5739  tgid:5739  ppid:2      task_flags:0x4208060 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 __mutex_lock+0x7e6/0x1350
 rdma_dev_change_netns+0x39/0x300
 rdma_dev_exit_net+0x203/0x340
 ops_undo_list+0x49a/0x990
 cleanup_net+0x4c5/0x800
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
INFO: task syz.2.3617:19076 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.3617      state:D stack:24904 pid:19076 tgid:19075 ppid:5850   task_flags:0x400140 flags:0x00004004
Call Trace:
 <TASK>
 __schedule+0x1798/0x4cc0
 schedule+0x165/0x360
 schedule_timeout+0x9a/0x270
 wait_for_completion+0x2bf/0x5d0
 disable_device+0x1c6/0x320
 __ib_unregister_device+0x2cb/0x3f0
 ib_unregister_device_and_put+0xb8/0xf0
 nldev_dellink+0x2d1/0x320
 rdma_nl_rcv+0x6ae/0x980
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 ____sys_sendmsg+0x505/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __x64_sys_sendmsg+0x19b/0x260
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb8d918ebe9
RSP: 002b:00007fb8d9fc4038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb8d93b5fa0 RCX: 00007fb8d918ebe9
RDX: 0000000000000000 RSI: 00002000000002c0 RDI: 0000000000000008
RBP: 00007fb8d9211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb8d93b6038 R14: 00007fb8d93b5fa0 R15: 00007ffd33e816b8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 nmi_cpu_backtrace+0x39e/0x3d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 watchdog+0xf93/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5766 Comm: sshd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x11/0x90
Code: 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 65 48 8b 14 25 08 60 a0 92 <65> 8b 0d e8 b1 e0 10 81 e1 00 01 ff 00 74 11 81 f9 00 01 00 00 75
RSP: 0000:ffffc90002fcee08 EFLAGS: 00000202
RAX: ffffffff84d13629 RBX: 0000000000000315 RCX: ffff888021963980
RDX: ffff888021963980 RSI: 000000000000000f RDI: 0000000000000009
RBP: dffffc0000000000 R08: ffff888021963980 R09: 0000000000000003
R10: 0000000000000008 R11: 0000000000000000 R12: 000000000000000f
R13: ffffc90002fcef98 R14: 000000000000000f R15: 0000000000000002
FS:  00007f2680b9a800(0000) GS:ffff8881a3c1a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055abc9cfd06c CR3: 000000002665a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 next_bits+0x349/0x870
 __do_index+0xa8/0x570
 sw842_decompress+0x3c6/0xaf0
 scomp_acomp_comp_decomp+0x6dd/0x9e0
 crypto_acomp_decompress+0x42f/0xb20
 zswap_decompress+0x3ec/0x810
 zswap_load+0x2f1/0x4c0
 swap_read_folio+0x60a/0x2410
 swap_cluster_readahead+0x327/0x5f0
 swapin_readahead+0x17d/0xb50
 do_swap_page+0x525/0x5ac0
 __handle_mm_fault+0xe55/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x55abc4b41bae
Code: 45 31 c9 41 b8 01 00 00 00 b9 01 00 00 00 50 48 8d 05 a6 10 05 00 ba 4a 0a 00 00 48 8d 35 aa 25 05 00 41 56 50 e9 95 00 00 00 <8b> 70 1c 48 c7 40 34 ff ff ff ff 48 c7 40 3c ff ff ff ff 83 fe ff
RSP: 002b:00007ffe9224d080 EFLAGS: 00010202
RAX: 000055abc9cfd050 RBX: 0000000000000003 RCX: 00007ffe9224d158
RDX: 0000000000000007 RSI: 0000000000000003 RDI: 0000000000000001
RBP: 000055abc9d13460 R08: 000055abc9d149a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000055abc9d0e220
R13: 000000000000002a R14: 000000000000000a R15: 0000000000000000
 </TASK>
