INFO: task syz-executor.0:15869 blocked for more than 143 seconds. Not tainted 5.3.0-rc3+ #136 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.0 D27432 15869 8655 0x00004004 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+0x259/0x270 net/socket.c:2680 __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:00007faaeba6cc78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000000000008 RSI: 0000000020006880 RDI: 0000000000000006 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007faaeba6d6d4 R13: 00000000004c6d75 R14: 00000000004dc180 R15: 00000000ffffffff Showing all locks held in the system: 3 locks held by kworker/u4:1/21: #0: 0000000009788020 (&rq->lock){-.-.}, at: idle_balance kernel/sched/fair.c:9869 [inline] #0: 0000000009788020 (&rq->lock){-.-.}, at: pick_next_task_fair+0xc42/0x1a60 kernel/sched/fair.c:6906 #1: 00000000cddf0c6f (rcu_read_lock){....}, at: __update_idle_core+0x45/0x3f0 kernel/sched/fair.c:5874 #2: 00000000829ae4ed (&base->lock){-.-.}, at: lock_timer_base+0x56/0x1b0 kernel/time/timer.c:932 1 lock held by khungtaskd/1057: #0: 00000000cddf0c6f (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5256 2 locks held by rsyslogd/8529: #0: 0000000068434fc7 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 #1: 00000000f653e835 (logbuf_lock){-.-.}, at: is_bpf_text_address+0x0/0x170 kernel/bpf/core.c:695 2 locks held by getty/8619: #0: 0000000008ca694c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000000ab3314c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8620: #0: 00000000138fa76a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000008dccded0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8621: #0: 00000000a4dcb452 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000c2ac5989 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8622: #0: 000000009eebc051 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 00000000ed7c7074 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8623: #0: 0000000069bb5197 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 0000000050b8a798 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8624: #0: 0000000063b05bb0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000002d1a52fd (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8625: #0: 000000005fea3e7c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: 000000006b0c1955 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.0/15869: #0: 00000000b7c6ce1f (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: 00000000b7c6ce1f (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x244/0x580 crypto/af_alg.c:759 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1057 Comm: khungtaskd Not tainted 5.3.0-rc3+ #136 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 21 Comm: kworker/u4:1 Not tainted 5.3.0-rc3+ #136 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:lock_release+0x454/0x960 kernel/locking/lockdep.c:4433 Code: 00 44 8b 85 50 ff ff ff 45 2b 46 b0 45 39 87 88 08 00 00 0f 85 fc 01 00 00 65 4c 8b 24 25 40 fe 01 00 49 8d bc 24 8c 08 00 00 <48> b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 RSP: 0018:ffff8880a9a47c00 EFLAGS: 00000046 RAX: 0000000000000002 RBX: 1ffff11015348f85 RCX: 1ffff11015346dc0 RDX: 0000000000000002 RSI: 1ffff11015346dcc RDI: ffff8880a9a36e0c RBP: ffff8880a9a47cd0 R08: 0000000000000003 R09: ffff8880a9a36e08 R10: fffffbfff134b147 R11: ffffffff89a58a3f R12: ffff8880a9a36580 R13: ffffffff8722f12a R14: ffff8880a9a47ca8 R15: ffff8880a9a36580 FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000000991bb000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:213 [inline] rcu_read_unlock include/linux/rcupdate.h:646 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:411 [inline] batadv_nc_worker+0x225/0x760 net/batman-adv/network-coding.c:718 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