[ 3132] 0 3132 17634 12724 32 3 0 1000 syz-executor2 [ 3135] 0 3135 17708 8237 25 3 0 0 syz-executor4 [ 3181] 0 3181 17634 12724 32 3 0 1000 syz-executor2 [ 3230] 0 3230 17634 12724 32 3 0 1000 syz-executor2 [ 3307] 0 3307 17634 12724 32 3 0 1000 syz-executor2 INFO: task syz-executor5:30165 blocked for more than 140 seconds. Not tainted 4.14.90+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 3380] 0 3380 17634 12724 32 3 0 1000 syz-executor2 syz-executor5 D [ 3450] 0 3450 17634 12724 32 3 0 1000 syz-executor2 27832 30165 1844 0x00000004 [ 3453] 0 3453 17667 12756 31 3 0 0 syz-executor3 Call Trace: [ 3468] 0 3468 17634 12724 32 3 0 1000 syz-executor2 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 [ 3470] 0 3470 17700 9268 26 3 0 0 syz-executor3 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [ 3529] 0 3529 17766 8450 33 4 0 0 syz-executor3 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 [ 3539] 0 3539 17634 12724 32 3 0 1000 syz-executor2 [ 3554] 0 3554 17766 8450 33 4 0 0 syz-executor3 [ 3569] 0 3569 17601 8459 25 4 0 0 syz-executor4 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [ 3606] 0 3606 17634 12724 32 3 0 1000 syz-executor2 [ 3612] 0 3612 17634 8462 25 4 0 0 syz-executor5 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 [ 3617] 0 3617 17667 8468 25 4 0 0 syz-executor5 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4579b9 RSP: 002b:00007ff21aa82c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [ 3672] 0 3672 17634 8441 26 4 0 0 syz-executor0 [ 3683] 0 3683 17634 12724 32 3 0 1000 syz-executor2 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004579b9 [ 3738] 0 3738 17601 8460 25 4 0 0 syz-executor5 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000010 R09: 0000000000000000 [ 3740] 0 3740 17634 12724 32 3 0 1000 syz-executor2 R10: 0000000020000040 R11: 0000000000000246 R12: 00007ff21aa836d4 [ 3757] 0 3757 17601 8232 24 3 0 0 syz-executor4 R13: 00000000004c581b R14: 00000000004da098 R15: 00000000ffffffff [ 3763] 0 3763 17634 8236 24 3 0 0 syz-executor4 Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 2 locks held by getty/1754: #0: (&tty->ldisc_sem){++++}, at: [] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275 #1: (&ldata->atomic_read_lock){+.+.}, at: [] n_tty_read+0x1ff/0x1700 drivers/tty/n_tty.c:2156 ============================================= [ 3798] 0 3798 17634 12724 32 3 0 1000 syz-executor2 [ 3847] 0 3847 17634 12724 32 3 0 1000 syz-executor2 [ 3875] 0 3875 17602 8232 24 3 0 0 syz-executor5 [ 3877] 0 3877 17633 8235 25 3 0 0 syz-executor5 [ 3925] 0 3925 17634 8233 25 3 0 0 syz-executor0 NMI backtrace for cpu 1 CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.90+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xb9/0x11b lib/dump_stack.c:53 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline] watchdog+0x574/0xa70 kernel/hung_task.c:252 kthread+0x348/0x420 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 190 Comm: udevd Not tainted 4.14.90+ #29 task: ffff8881d4792f00 task.stack: ffff8881d4090000 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:60 RSP: 0000:ffff8881d4096fe0 EFLAGS: 00000246 RAX: ffff8881d4792f00 RBX: ffffea0005e0fce0 RCX: 1ffff1103a8f26e4 RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffffea0005e0fcc8 RBP: dffffc0000000000 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8881d4793780 R11: 0000000000000001 R12: ffff8881d4097330 R13: 0000000000000000 R14: 0000000000000000 R15: ffffea0005e0fcc0 FS: 00007f71b52407a0(0000) GS:ffff8881db800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045d911 CR3: 00000001d404c001 CR4: 00000000001606b0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: shrink_page_list+0x600/0x31d0 mm/vmscan.c:1033 shrink_inactive_list+0x3b9/0xee0 mm/vmscan.c:1816 shrink_list mm/vmscan.c:2175 [inline] shrink_node_memcg+0x5e8/0x12e0 mm/vmscan.c:2438 shrink_node+0x301/0xbf0 mm/vmscan.c:2630 shrink_zones mm/vmscan.c:2812 [inline] do_try_to_free_pages+0x349/0xde0 mm/vmscan.c:2874 try_to_free_pages+0x204/0x6b0 mm/vmscan.c:3080 __perform_reclaim mm/page_alloc.c:3593 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3614 [inline] __alloc_pages_slowpath mm/page_alloc.c:4001 [inline] __alloc_pages_nodemask+0xa8a/0x2180 mm/page_alloc.c:4210 __alloc_pages include/linux/gfp.h:461 [inline] __alloc_pages_node include/linux/gfp.h:474 [inline] alloc_pages_node include/linux/gfp.h:488 [inline] __page_cache_alloc include/linux/pagemap.h:226 [inline] page_cache_read mm/filemap.c:2286 [inline] filemap_fault+0xcdd/0x14a0 mm/filemap.c:2470 ext4_filemap_fault+0x7d/0xb0 fs/ext4/inode.c:6179 __do_fault+0x80/0x210 mm/memory.c:3194 do_read_fault mm/memory.c:3604 [inline] do_fault mm/memory.c:3730 [inline] handle_pte_fault mm/memory.c:3960 [inline] __handle_mm_fault+0x991/0x25f0 mm/memory.c:4084 handle_mm_fault+0x2f2/0x6eb mm/memory.c:4121 __do_page_fault+0x45d/0xb60 arch/x86/mm/fault.c:1425 page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1104 RIP: 0000:0x18d4a00 RSP: 0bb8:0000000000000000 EFLAGS: 00000003 Code: ff ff 48 89 df e8 71 03 22 00 e9 9f fe ff ff 4c 89 e7 e8 64 03 22 00 e9 2c fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <65> 48 8b 04 25 c0 de 01 00 48 85 c0 74 1a 65 8b 15 3b f5 f0 66 [ 3930] 0 3930 17634 12724 32 3 0 1000 syz-executor2