[19839] 0 19839 18145 8726 26 3 0 0 syz-executor.4 [19846] 0 19846 18178 8725 25 3 0 1000 syz-executor.5 [19865] 0 19865 18178 8724 25 3 0 1000 syz-executor.2 [19879] 0 19879 18145 8722 25 3 0 1000 syz-executor.2 INFO: task syz-executor.1:13804 blocked for more than 140 seconds. Not tainted 4.14.137+ #29 [19899] 0 19899 18178 8725 25 3 0 1000 syz-executor.5 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [19907] 0 19907 18178 8723 25 3 0 1000 syz-executor.0 syz-executor.1 D30528 13804 1846 0x00000004 [19920] 0 19920 18178 8724 25 3 0 1000 syz-executor.2 Call Trace: [19929] 0 19929 18178 8723 25 3 0 1000 syz-executor.0 [19951] 0 19951 18178 8724 25 3 0 1000 syz-executor.2 [19954] 0 19954 18178 8723 25 3 0 1000 syz-executor.0 schedule+0x92/0x1c0 kernel/sched/core.c:3498 __lock_sock+0x12b/0x220 net/core/sock.c:2235 [19982] 0 19982 18178 8723 25 3 0 1000 syz-executor.0 [19983] 0 19983 18178 8724 25 3 0 1000 syz-executor.2 [20001] 0 20001 18178 8724 25 3 0 1000 syz-executor.2 [20005] 0 20005 18178 8723 25 3 0 1000 syz-executor.0 lock_sock_nested+0xe1/0x100 net/core/sock.c:2759 lock_sock include/net/sock.h:1462 [inline] packet_setsockopt+0x33b/0x27a0 net/packet/af_packet.c:3881 [20018] 0 20018 18178 8723 25 3 0 1000 syz-executor.0 [20043] 0 20043 18178 8723 25 3 0 1000 syz-executor.0 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x12b/0x210 net/socket.c:1844 [20044] 0 20044 18178 8724 25 3 0 1000 syz-executor.2 [20063] 0 20063 18178 8723 25 3 0 1000 syz-executor.0 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 [20085] 0 20085 18145 8722 25 3 0 1000 syz-executor.2 RIP: 0033:0x459829 RSP: 002b:00007f5e618f9c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [20090] 0 20090 18178 8723 25 3 0 1000 syz-executor.0 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 [20134] 0 20134 18145 8721 25 3 0 1000 syz-executor.0 [20135] 0 20135 18178 8724 25 3 0 1000 syz-executor.2 RDX: 0000000000000013 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000075bfc8 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 00007f5e618fa6d4 [20164] 0 20164 18178 8723 25 3 0 1000 syz-executor.0 R13: 00000000004c8220 R14: 00000000004deb20 R15: 00000000ffffffff INFO: task syz-executor.1:13839 blocked for more than 140 seconds. [20165] 0 20165 18178 8724 25 3 0 1000 syz-executor.2 Not tainted 4.14.137+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [20185] 0 20185 18145 8721 25 3 0 1000 syz-executor.0 [20200] 0 20200 18178 8723 25 3 0 1000 syz-executor.0 syz-executor.1 D30528 13839 1846 0x00000004 Call Trace: [20221] 0 20221 18145 8721 25 3 0 1000 syz-executor.0 schedule+0x92/0x1c0 kernel/sched/core.c:3498 [20228] 0 20228 18178 8724 25 3 0 1000 syz-executor.2 __lock_sock+0x12b/0x220 net/core/sock.c:2235 [20243] 0 20243 18178 8723 25 3 0 1000 syz-executor.0 lock_sock_nested+0xe1/0x100 net/core/sock.c:2759 lock_sock include/net/sock.h:1462 [inline] packet_setsockopt+0x33b/0x27a0 net/packet/af_packet.c:3881 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x12b/0x210 net/socket.c:1844 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459829 RSP: 002b:00007f5e618b7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [20263] 0 20263 18178 8723 25 3 0 1000 syz-executor.0 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000459829 RDX: 0000000000000013 RSI: 0000000000000107 RDI: 0000000000000003 [20277] 0 20277 18145 8722 25 3 0 1000 syz-executor.2 RBP: 000000000075c118 R08: 0000000000000004 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 00007f5e618b86d4 [20299] 0 20299 18178 8724 25 3 0 1000 syz-executor.2 R13: 00000000004c8220 R14: 00000000004deb20 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [<0000000084e691ad>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4541 [20301] 0 20301 18178 8774 26 4 0 1000 syz-executor.5 3 locks held by rs:main Q:Reg/1624: #0: (&f->f_pos_lock){+.+.}, at: [<00000000865ffa74>] __fdget_pos+0xb5/0xd0 fs/file.c:769 #1: (sb_writers#4){.+.+}, at: [<00000000fa0d5a2c>] file_start_write include/linux/fs.h:2732 [inline] #1: (sb_writers#4){.+.+}, at: [<00000000fa0d5a2c>] vfs_write+0x3d8/0x4d0 fs/read_write.c:545 #2: (&sb->s_type->i_mutex_key#9){++++}, at: [<00000000fc1f3d5e>] inode_trylock include/linux/fs.h:738 [inline] #2: (&sb->s_type->i_mutex_key#9){++++}, at: [<00000000fc1f3d5e>] ext4_file_write_iter+0x1b0/0xdb0 fs/ext4/file.c:234 1 lock held by rsyslogd/1626: #0: (&mm->mmap_sem){++++}, at: [<00000000d48db416>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1352 1 lock held by cron/1676: [20308] 0 20308 18178 8723 25 3 0 1000 syz-executor.0 #0: (&ei->i_mmap_sem){++++}, at: [<00000000448e3be1>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6196 2 locks held by getty/1754: #0: (&tty->ldisc_sem){++++}, at: [<00000000c34b9c21>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000122a4eb2>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156 ============================================= [20331] 0 20331 18178 8723 25 3 0 1000 syz-executor.0 [20354] 0 20354 18145 8721 25 3 0 1000 syz-executor.0 [20356] 0 20356 18178 8724 25 3 0 1000 syz-executor.2 [20393] 0 20393 18178 8723 25 3 0 1000 syz-executor.0 [20395] 0 20395 18178 8724 25 3 0 1000 syz-executor.2 [20414] 0 20414 18178 8723 25 3 0 1000 syz-executor.0 [20437] 0 20437 18178 8724 25 3 0 1000 syz-executor.2 [20440] 0 20440 18178 8723 25 3 0 1000 syz-executor.0 [20472] 0 20472 18145 8721 25 3 0 1000 syz-executor.0 [20474] 0 20474 18145 8722 25 3 0 1000 syz-executor.2 [20514] 0 20514 18178 8723 25 3 0 1000 syz-executor.0 [20518] 0 20518 18178 8724 25 3 0 1000 syz-executor.2 NMI backtrace for cpu 0 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.137+ #29 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 nmi_cpu_backtrace.cold+0x47/0x86 lib/nmi_backtrace.c:101 [20539] 0 20539 18145 8722 25 3 0 1000 syz-executor.2 nmi_trigger_cpumask_backtrace+0x119/0x147 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:140 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:195 [inline] watchdog+0x629/0xbe0 kernel/hung_task.c:274 kthread+0x31f/0x430 kernel/kthread.c:232 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:404 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1 Comm: init Not tainted 4.14.137+ #29 task: 00000000a4fb42e2 task.stack: 0000000084766532 RIP: 0010:perf_trace_lock_acquire+0x136/0x4e0 include/trace/events/lock.h:13 RSP: 0018:ffff8881d65defc8 EFLAGS: 00000097 RAX: 0000000000000001 RBX: 0000607e28611100 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffffb59492c0 RDI: ffffffffb5ca9428 RBP: ffff8881d65df0a8 R08: 0000000000000002 R09: 0000000000000000 R10: ffffffffb3bf4d50 R11: ffffffffb622cc4b R12: ffffffffb5ec09e0 R13: ffffffffb5ed3e20 R14: ffff8881d65df080 R15: 0000000000000000 FS: 00007f721b7ce7a0(0000) GS:ffff8881d7700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f721adfea50 CR3: 00000001d10d4003 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x279/0x360 kernel/locking/lockdep.c:3990 rcu_lock_acquire include/linux/rcupdate.h:242 [inline] rcu_read_lock include/linux/rcupdate.h:629 [inline] page_evictable+0x35/0x1f0 mm/vmscan.c:3980 shrink_page_list+0x351/0x3340 mm/vmscan.c:1010 shrink_inactive_list+0x40a/0x1130 mm/vmscan.c:1826 shrink_list mm/vmscan.c:2179 [inline] shrink_node_memcg+0x5ad/0x1470 mm/vmscan.c:2444 shrink_node+0x2f3/0xc30 mm/vmscan.c:2636 shrink_zones mm/vmscan.c:2818 [inline] do_try_to_free_pages+0x350/0xd80 mm/vmscan.c:2876 try_to_free_pages+0x27c/0x710 mm/vmscan.c:3082 __perform_reclaim mm/page_alloc.c:3602 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:3624 [inline] __alloc_pages_slowpath mm/page_alloc.c:4011 [inline] __alloc_pages_nodemask+0xaee/0x2370 mm/page_alloc.c:4220 __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] alloc_thread_stack_node kernel/fork.c:241 [inline] dup_task_struct kernel/fork.c:527 [inline] copy_process.part.0+0x266/0x68b0 kernel/fork.c:1623 copy_process kernel/fork.c:1598 [inline] _do_fork+0x193/0xce0 kernel/fork.c:2094 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x7f721ae79f46 RSP: 002b:00007fffba581cc0 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fffba581cc0 RCX: 00007f721ae79f46 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011 RBP: 00007fffba581d00 R08: 0000000000000000 R09: 0000000000000001 R10: 00007f721b7cea70 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fffba581e50 R15: 00000000008a7f48 Code: c1 ea 03 80 3c 02 00 0f 85 f7 02 00 00 49 8b 5c 24 78 e8 be 77 9d 00 48 b9 00 00 00 00 00 fc ff df 89 c0 48 8d 3c c5 20 94 ca b5 <48> 89 fe 48 c1 ee 03 80 3c 0e 00 0f 85 b0 02 00 00 48 03 1c c5