INFO: task syz-executor.2:28801 blocked for more than 143 seconds. Not tainted 5.3.0+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D28712 28801 8737 0x00004004 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x76e/0x17d0 kernel/sched/core.c:4056 schedule+0xd9/0x260 kernel/sched/core.c:4123 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1869 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+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a09 Code: Bad RIP value. RSP: 002b:00007f5111b42c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a09 RDX: 0000000000000001 RSI: 0000000020007e00 RDI: 0000000000000005 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5111b436d4 R13: 00000000004c6f46 R14: 00000000004dc530 R15: 00000000ffffffff INFO: task syz-executor.2:28807 blocked for more than 143 seconds. Not tainted 5.3.0+ #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.2 D27848 28807 8737 0x00000004 Call Trace: context_switch kernel/sched/core.c:3384 [inline] __schedule+0x76e/0x17d0 kernel/sched/core.c:4056 schedule+0xd9/0x260 kernel/sched/core.c:4123 schedule_timeout+0x717/0xc50 kernel/time/timer.c:1869 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+0xfa/0x760 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459a09 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <90> 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00007f5111b21c78 EFLAGS: 00000246 ORIG_RAX: 000000000000012b RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459a09 RDX: 0000000000000001 RSI: 0000000020007e00 RDI: 0000000000000005 RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5111b226d4 R13: 00000000004c6f46 R14: 00000000004dc530 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1064: #0: ffffffff88fab280 (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:5337 2 locks held by rsyslogd/8602: #0: ffff8880921c93a0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 #1: ffff8880ae935858 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1211 [inline] #1: ffff8880ae935858 (&rq->lock){-.-.}, at: __schedule+0x1ff/0x17d0 kernel/sched/core.c:4008 2 locks held by getty/8692: #0: ffff8880a93e0290 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f212e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8693: #0: ffff8880a7a88d50 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f252e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8694: #0: ffff8880a93e0b10 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f1d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8695: #0: ffff8880a17bcd90 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f292e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8696: #0: ffff8880a16febd0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f312e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8697: #0: ffff8880a16ff450 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005f2d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 2 locks held by getty/8698: #0: ffff8880a7abd650 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:340 #1: ffffc90005ef92e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1c10 drivers/tty/n_tty.c:2156 1 lock held by syz-executor.2/28801: #0: ffff888069482210 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: ffff888069482210 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x244/0x580 crypto/af_alg.c:759 1 lock held by syz-executor.2/28807: #0: ffff8880696c6450 (sk_lock-AF_ALG){+.+.}, at: lock_sock include/net/sock.h:1522 [inline] #0: ffff8880696c6450 (sk_lock-AF_ALG){+.+.}, at: af_alg_wait_for_data+0x244/0x580 crypto/af_alg.c:759 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1064 Comm: khungtaskd Not tainted 5.3.0+ #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+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: 9240 Comm: kworker/u4:7 Not tainted 5.3.0+ #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:preempt_count_sub+0x29/0x150 kernel/sched/core.c:3810 Code: 00 48 c7 c0 e0 60 ae 8a 55 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 89 e5 53 83 e0 07 48 c1 e9 03 83 c0 03 89 fb 0f b6 14 11 <38> d0 7c 08 84 d2 0f 85 e8 00 00 00 8b 0d 05 e4 5f 09 85 c9 75 1b RSP: 0018:ffff8880613f7c08 EFLAGS: 00000006 RAX: 0000000000000003 RBX: 0000000000000200 RCX: 1ffffffff155cc1c RDX: 0000000000000004 RSI: 0000000000000000 RDI: 0000000000000200 RBP: ffff8880613f7c10 R08: 0000000000000001 R09: ffffed1010fab17a R10: ffffed1010fab179 R11: ffff888087d58bcb R12: ffffffff87260be5 R13: ffff88805f5766c0 R14: ffffffff872616b0 R15: 0000000000000007 FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 000000008eb60000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __local_bh_enable_ip+0x139/0x270 kernel/softirq.c:182 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:176 [inline] _raw_spin_unlock_bh+0x31/0x40 kernel/locking/spinlock.c:207 spin_unlock_bh include/linux/spinlock.h:383 [inline] batadv_nc_purge_paths+0x265/0x370 net/batman-adv/network-coding.c:470 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