INFO: task syz-executor.1:26924 blocked for more than 143 seconds. Not tainted 5.2.0+ #97 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28592 26924 12679 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+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:00007f246a52ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000000000030 RSI: 0000000020007e00 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000020008000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f246a52b6d4 R13: 00000000004c6d67 R14: 00000000004dc0a8 R15: 00000000ffffffff INFO: task syz-executor.1:27266 blocked for more than 143 seconds. Not tainted 5.2.0+ #97 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.1 D28856 27266 12679 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+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:00007f246a509c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000000000030 RSI: 0000000020007e00 RDI: 0000000000000005 RBP: 000000000075bfc8 R08: 0000000020008000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f246a50a6d4 R13: 00000000004c6d67 R14: 00000000004dc0a8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1052: #0: 00000000c179338b (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5257 1 lock held by rsyslogd/9133: #0: 000000007622c486 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by getty/9223: #0: 00000000627a45d4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f85100e3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9224: #0: 00000000a27b069b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000fe52d693 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9225: #0: 00000000b8737b63 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000005e8792ff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9226: #0: 0000000092fda636 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000558d1a82 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9227: #0: 000000008bdf20e8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000716add3a (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9228: #0: 00000000927dcec2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000dc6c787f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/9229: #0: 00000000bf4d9935 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000d8759cfe (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.1/26924: #0: 00000000e55466a6 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: 00000000e55466a6 (sk_lock-AF_ALG){+.+.}, at: aead_recvmsg+0xbb/0x16a0 crypto/algif_aead.c:328 1 lock held by syz-executor.1/27266: #0: 000000003fc09c12 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: 000000003fc09c12 (sk_lock-AF_ALG){+.+.}, at: aead_recvmsg+0xbb/0x16a0 crypto/algif_aead.c:328 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1052 Comm: khungtaskd Not tainted 5.2.0+ #97 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: 9521 Comm: kworker/u4:6 Not tainted 5.2.0+ #97 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__local_bh_disable_ip+0x0/0x1b0 kernel/softirq.c:111 Code: ff ff ff 48 c7 c7 10 f0 d2 88 e8 5b 0e 67 00 e9 5d ff ff ff 48 c7 c7 10 f0 d2 88 e8 4a 0e 67 00 eb 81 0f 1f 84 00 00 00 00 00 <55> 48 89 e5 41 55 41 54 49 89 fc 53 89 f3 65 8b 05 83 76 bc 7e a9 RSP: 0018:ffff8880639dfc40 EFLAGS: 00000286 RAX: ffff88809e0fbdc0 RBX: ffff88809cd2d688 RCX: ffffffff871c9893 RDX: 0000000000000000 RSI: 0000000000000201 RDI: ffffffff871c96d8 RBP: ffff8880639dfc50 R08: ffff888099ab4040 R09: fffffbfff14a7756 R10: fffffbfff14a7755 R11: ffffffff8a53baaf R12: ffff88809cd2d688 R13: dffffc0000000000 R14: ffffffff871ca1c0 R15: 000000000000005f FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f15f7abed30 CR3: 000000008b802000 CR4: 00000000001406f0 Call Trace: 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+0x2cf/0x760 net/batman-adv/network-coding.c:721 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