INFO: task hung in htable

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	INFO: task hung in htable_put	C	done	done	29	1738d	1791d	15/28	fixed on 2020/11/16 12:12
linux-4.19	INFO: task hung in htable_put	C		done	8	1733d	1779d	1/1	fixed on 2020/03/24 16:08

Bluetooth: hci4: command 0x0406 tx timeout Bluetooth: hci1: command 0x0406 tx timeout Bluetooth: hci5: command 0x0406 tx timeout ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 INFO: task syz-executor.5:12138 blocked for more than 140 seconds. Not tainted 4.19.177-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28152 12138 8161 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common+0x29c/0x470 kernel/sched/completion.c:115 __flush_work+0x4bb/0x8b0 kernel/workqueue.c:2925 __cancel_work_timer+0x412/0x590 kernel/workqueue.c:3012 htable_destroy net/netfilter/xt_hashlimit.c:414 [inline] htable_put+0x115/0x1c0 net/netfilter/xt_hashlimit.c:443 cleanup_match net/ipv4/netfilter/ip_tables.c:463 [inline] cleanup_entry+0x12d/0x300 net/ipv4/netfilter/ip_tables.c:648 do_replace net/ipv4/netfilter/ip_tables.c:1151 [inline] do_ipt_set_ctl+0x343/0x420 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x6f/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1258 [inline] ip_setsockopt+0xd8/0xf0 net/ipv4/ip_sockglue.c:1238 udp_setsockopt+0x5d/0xa0 net/ipv4/udp.c:2553 ipv6_setsockopt+0x13f/0x160 net/ipv6/ipv6_sockglue.c:935 tcp_setsockopt+0x86/0xd0 net/ipv4/tcp.c:3097 __sys_setsockopt+0x14d/0x240 net/socket.c:1901 __do_sys_setsockopt net/socket.c:1912 [inline] __se_sys_setsockopt net/socket.c:1909 [inline] __x64_sys_setsockopt+0xba/0x150 net/socket.c:1909 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465ef9 Code: Bad RIP value. RSP: 002b:00007fa63da2b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465ef9 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00000000004bfa34 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000020000d80 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffd26456fef R14: 00007fa63da2b300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/1:1/25: 1 lock held by khungtaskd/1566: #0: 00000000d05cf2c0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4440 1 lock held by in:imklog/7817: #0: 00000000192b237f (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.5/12138: #0: 00000000ccbfe76b (hashlimit_mutex){+.+.}, at: htable_put+0x1a/0x1c0 net/netfilter/xt_hashlimit.c:440 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1566 Comm: khungtaskd Not tainted 4.19.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 12133 Comm: syz-executor.2 Not tainted 4.19.177-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:reacquire_held_locks+0x9/0x430 kernel/locking/lockdep.c:3550 Code: 00 e9 26 ea ff ff 4c 8d bc 24 d8 00 00 00 4c 89 ff e8 7b 51 ff ff e9 c7 f0 ff ff 66 0f 1f 44 00 00 48 63 c2 39 d6 48 8d 04 80 <48> 8d 84 c7 88 08 00 00 0f 86 89 02 00 00 83 ee 01 41 57 29 d6 41 RSP: 0018:ffff88804dcbf750 EFLAGS: 00000046 RAX: 000000000000000a RBX: ffffffff8d23b760 RCX: 1ffff110085cbd96 RDX: 0000000000000002 RSI: 0000000000000002 RDI: ffff888042e5e400 RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000001 R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff11009b97eee R13: b1cf671bc3d80e9f R14: ffff888042e5e400 R15: 0000000000000002 FS: 00007f7a16bf4700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b3162a000 CR3: 00000000a9229000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_release kernel/locking/lockdep.c:3706 [inline] lock_release+0x379/0x8b0 kernel/locking/lockdep.c:3926 __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:176 mddev_put drivers/md/md.c:540 [inline] md_open+0x20b/0x2a0 drivers/md/md.c:7460 __blkdev_get+0x372/0x1480 fs/block_dev.c:1494 blkdev_get+0xb0/0x940 fs/block_dev.c:1627 blkdev_open+0x202/0x290 fs/block_dev.c:1788 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x465ef9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7a16bf4188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000000000000 RSI: 00000000200001c0 RDI: ffffffffffffff9c RBP: 00000000004bfa34 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffdd264b69f R14: 00007f7a16bf4300 R15: 0000000000022000