INFO: task syz-executor.5:31746 blocked for more than 143 seconds. Not tainted 5.2.0+ #67 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28856 31746 8818 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:685 [inline] _aead_recvmsg crypto/algif_aead.c:309 [inline] aead_recvmsg+0x11e3/0x16a0 crypto/algif_aead.c:330 sock_recvmsg_nosec net/socket.c:871 [inline] sock_recvmsg net/socket.c:889 [inline] sock_recvmsg+0xce/0x110 net/socket.c:885 ___sys_recvmsg+0x271/0x5a0 net/socket.c:2480 do_recvmmsg+0x27e/0x7a0 net/socket.c:2601 __sys_recvmmsg+0xe5/0x270 net/socket.c:2682 __do_sys_recvmmsg net/socket.c:2703 [inline] __se_sys_recvmmsg net/socket.c:2696 [inline] __x64_sys_recvmmsg+0xe6/0x140 net/socket.c:2696 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: 24 60 48 8b 42 08 48 8b 4a 10 48 8b 5a 18 48 8b 72 20 48 8b 7a 28 48 8b 3f 4c 8b 42 30 48 8b 52 38 48 85 d2 76 62 48 89 44 24 <58> 4c 89 44 24 28 48 89 0c 24 48 89 5c 24 08 48 c7 44 24 10 00 00 RSP: 002b:00007f0868871c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000000000030 RSI: 0000000020007e00 RDI: 0000000000000004 RBP: 000000000075bf20 R08: 0000000020008000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f08688726d4 R13: 00000000004c6d67 R14: 00000000004dc0a8 R15: 00000000ffffffff INFO: task syz-executor.5:31796 blocked for more than 143 seconds. Not tainted 5.2.0+ #67 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.5 D28856 31796 8818 0x00000004 Call Trace: context_switch kernel/sched/core.c:3254 [inline] __schedule+0x755/0x1580 kernel/sched/core.c:3880 schedule+0xa8/0x270 kernel/sched/core.c:3944 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1783 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x29c/0x440 kernel/sched/completion.c:136 crypto_wait_req include/linux/crypto.h:685 [inline] _aead_recvmsg crypto/algif_aead.c:309 [inline] aead_recvmsg+0x11e3/0x16a0 crypto/algif_aead.c:330 sock_recvmsg_nosec net/socket.c:871 [inline] sock_recvmsg net/socket.c:889 [inline] sock_recvmsg+0xce/0x110 net/socket.c:885 ___sys_recvmsg+0x271/0x5a0 net/socket.c:2480 do_recvmmsg+0x27e/0x7a0 net/socket.c:2601 __sys_recvmmsg+0xe5/0x270 net/socket.c:2682 __do_sys_recvmmsg net/socket.c:2703 [inline] __se_sys_recvmmsg net/socket.c:2696 [inline] __x64_sys_recvmmsg+0xe6/0x140 net/socket.c:2696 do_syscall_64+0xfd/0x6a0 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459829 Code: 24 60 48 8b 42 08 48 8b 4a 10 48 8b 5a 18 48 8b 72 20 48 8b 7a 28 48 8b 3f 4c 8b 42 30 48 8b 52 38 48 85 d2 76 62 48 89 44 24 <58> 4c 89 44 24 28 48 89 0c 24 48 89 5c 24 08 48 c7 44 24 10 00 00 RSP: 002b:00007f0868850c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000000000030 RSI: 0000000020007e00 RDI: 0000000000000004 RBP: 000000000075bfc8 R08: 0000000020008000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f08688516d4 R13: 00000000004c6d67 R14: 00000000004dc0a8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1045: #0: 00000000a7f5313d (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5257 1 lock held by rsyslogd/8668: #0: 00000000e65550d2 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/8758: #0: 0000000014ec4a5e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000001c1ab4ee (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8759: #0: 0000000019a60226 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f3d7d39d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8760: #0: 00000000966babad (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 0000000072775736 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8761: #0: 0000000034079e9d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000818a7a1e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8762: #0: 00000000c472934e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ef36ebd3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8763: #0: 0000000062b24f49 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000005b301e74 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8764: #0: 0000000033dbc826 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000c1c1c3ca (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by kworker/u4:5/29631: #0: 0000000069d9abcd (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1207 [inline] #0: 0000000069d9abcd (&rq->lock){-.-.}, at: __schedule+0x1f5/0x1580 kernel/sched/core.c:3832 #1: 00000000a7f5313d (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5820 1 lock held by syz-executor.5/31746: #0: 00000000b543e704 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: 00000000b543e704 (sk_lock-AF_ALG){+.+.}, at: aead_recvmsg+0xbb/0x16a0 crypto/algif_aead.c:328 1 lock held by syz-executor.5/31796: #0: 0000000032401e73 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: 0000000032401e73 (sk_lock-AF_ALG){+.+.}, at: aead_recvmsg+0xbb/0x16a0 crypto/algif_aead.c:328 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1045 Comm: khungtaskd Not tainted 5.2.0+ #67 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x70/0xb2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x23b/0x28b lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0x9d0/0xef0 kernel/hung_task.c:289 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 29631 Comm: kworker/u4:5 Not tainted 5.2.0+ #67 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_acquire+0x1275/0x4c30 kernel/locking/lockdep.c:3753 Code: 41 5d 41 5e 41 5f 5d c3 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 0f 85 e8 28 00 00 49 81 3e 60 56 e4 89 <0f> 84 4f ee ff ff 83 fe 01 0f 87 52 ee ff ff 48 b8 00 00 00 00 00 RSP: 0018:ffff888062b77aa0 EFLAGS: 00000006 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1ffff1100c8d3b48 RSI: 0000000000000000 RDI: 0000000000000001 RBP: ffff888062b77bb8 R08: 0000000000000001 R09: 0000000000000001 R10: fffffbfff1349ef7 R11: ffff88808eb56080 R12: ffff88806469da40 R13: 0000000000000000 R14: ffff88806469da40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000009592e000 CR4: 00000000001406e0 Call Trace: lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4413 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:135 [inline] _raw_spin_lock_bh+0x33/0x50 kernel/locking/spinlock.c:175 spin_lock_bh include/linux/spinlock.h:343 [inline] batadv_nc_purge_paths+0xd8/0x370 net/batman-adv/network-coding.c:441 batadv_nc_worker+0x29c/0x760 net/batman-adv/network-coding.c:719 process_one_work+0x9af/0x1740 kernel/workqueue.c:2269 worker_thread+0x98/0xe40 kernel/workqueue.c:2415 kthread+0x361/0x430 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352