INFO: task syz-executor.2:18323 can't die for more than 141 seconds.
task:syz-executor.2  state:R  running task     stack:27776 pid:18323 ppid:  6562 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4965 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6246
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6412
 __cond_resched+0x13/0x20 kernel/sched/core.c:8125
 __vunmap+0x781/0xb70 mm/vmalloc.c:2632
 __vfree+0x3c/0xd0 mm/vmalloc.c:2680
 vfree+0x5a/0x90 mm/vmalloc.c:2711
 kvfree+0x2e/0x50 mm/util.c:618
 do_replace net/ipv6/netfilter/ip6_tables.c:1167 [inline]
 do_ip6t_set_ctl+0x58e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1008
 tcp_setsockopt+0x136/0x2520 net/ipv4/tcp.c:3656
 __sys_setsockopt+0x2db/0x610 net/socket.c:2176
 __do_sys_setsockopt net/socket.c:2187 [inline]
 __se_sys_setsockopt net/socket.c:2184 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2a6cbe7a39
RSP: 002b:00007f2a6a15d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f2a6cceaf60 RCX: 00007f2a6cbe7a39
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000004
RBP: 00007f2a6cc41c5f R08: 000000000000052e R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc36da08f R14: 00007f2a6a15d300 R15: 0000000000022000
 </TASK>
INFO: task syz-executor.2:18327 can't die for more than 141 seconds.
task:syz-executor.2  state:R  running task     stack:27768 pid:18327 ppid: 18323 flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4965 [inline]
 __schedule+0xa9a/0x4940 kernel/sched/core.c:6246
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6412
 __cond_resched_lock+0xe6/0xf0 kernel/sched/core.c:8173
 __purge_vmap_area_lazy+0x976/0x1c50 mm/vmalloc.c:1714
 try_purge_vmap_area_lazy mm/vmalloc.c:1727 [inline]
 free_vmap_area_noflush+0xa5b/0xd10 mm/vmalloc.c:1769
 free_unmap_vmap_area mm/vmalloc.c:1782 [inline]
 remove_vm_area+0x1ca/0x230 mm/vmalloc.c:2528
 vm_remove_mappings mm/vmalloc.c:2557 [inline]
 __vunmap+0x392/0xb70 mm/vmalloc.c:2622
 __vfree+0x3c/0xd0 mm/vmalloc.c:2680
 vfree+0x5a/0x90 mm/vmalloc.c:2711
 kvfree+0x2e/0x50 mm/util.c:618
 __vunmap+0x922/0xb70 mm/vmalloc.c:2637
 __vfree+0x3c/0xd0 mm/vmalloc.c:2680
 vfree+0x5a/0x90 mm/vmalloc.c:2711
 kvfree+0x2e/0x50 mm/util.c:618
 do_replace net/ipv6/netfilter/ip6_tables.c:1167 [inline]
 do_ip6t_set_ctl+0x58e/0xb90 net/ipv6/netfilter/ip6_tables.c:1639
 nf_setsockopt+0x83/0xe0 net/netfilter/nf_sockopt.c:101
 ipv6_setsockopt+0x122/0x180 net/ipv6/ipv6_sockglue.c:1008
 tcp_setsockopt+0x136/0x2520 net/ipv4/tcp.c:3656
 __sys_setsockopt+0x2db/0x610 net/socket.c:2176
 __do_sys_setsockopt net/socket.c:2187 [inline]
 __se_sys_setsockopt net/socket.c:2184 [inline]
 __x64_sys_setsockopt+0xba/0x150 net/socket.c:2184
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f2a6cbe7a39
RSP: 002b:00007f2a6a15d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 00007f2a6cceaf60 RCX: 00007f2a6cbe7a39
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000006
RBP: 00007f2a6cc41c5f R08: 000000000000052e R09: 0000000000000000
R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffc36da08f R14: 00007f2a6a15d300 R15: 0000000000022000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb835e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by in:imklog/6245:
 #0: ffff888017e1d4f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990

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