[30840] 0 30840 17634 12692 32 3 0 1000 syz-executor3 [30886] 0 30886 17634 12692 32 3 0 1000 syz-executor3 [30888] 0 30888 17632 8202 26 3 0 0 syz-executor0 [30893] 0 30893 17665 8204 26 3 0 0 syz-executor0 [30980] 0 30980 17634 12692 32 3 0 1000 syz-executor3 INFO: task syz-executor4:6991 blocked for more than 140 seconds. Not tainted 4.14.90+ #29 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [30993] 0 30993 17601 8234 25 4 0 0 syz-executor0 [30996] 0 30996 17634 12692 32 3 0 1000 syz-executor3 syz-executor4 D28152 6991 1843 0x00000004 Call Trace: [31055] 0 31055 17634 12692 32 3 0 1000 syz-executor3 [31102] 0 31102 17634 12692 32 3 0 1000 syz-executor3 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __lock_sock+0x11d/0x210 net/core/sock.c:2237 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 [31195] 0 31195 17634 12692 32 3 0 1000 syz-executor3 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x4d8/0x2680 net/packet/af_packet.c:3671 [31250] 0 31250 17634 12692 32 3 0 1000 syz-executor3 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [31283] 0 31283 17601 8231 25 4 0 0 syz-executor5 [31298] 0 31298 17634 12692 32 3 0 1000 syz-executor3 [31352] 0 31352 17634 12692 32 3 0 1000 syz-executor3 [31396] 0 31396 17634 8235 26 4 0 0 syz-executor2 [31406] 0 31406 17634 12692 32 3 0 1000 syz-executor3 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x457759 RSP: 002b:00007f37c4098c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457759 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 [31489] 0 31489 17634 12692 32 3 0 1000 syz-executor3 RBP: 000000000073bfa0 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 00007f37c40996d4 [31553] 0 31553 17634 12692 32 3 0 1000 syz-executor3 R13: 00000000004c545e R14: 00000000004d9c18 R15: 00000000ffffffff Showing all locks held in the system: [31574] 0 31574 17634 12692 32 3 0 1000 syz-executor3 [31595] 0 31595 17601 8230 24 4 0 0 syz-executor5 2 locks held by init/1: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 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 rs:main Q:Reg/1622: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 2 locks held by rsyslogd/1624: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 2 locks held by cron/1670: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 2 locks held by getty/1753: #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 2 locks held by kworker/u4:6/3650: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 2 locks held by kworker/u4:17/32503: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 2 locks held by kworker/u4:23/4112: #0: ("events_unbound"){+.+.}, at: [] process_one_work+0x784/0x1670 kernel/workqueue.c:2085 #1: ((&sub_info->work)){+.+.}, at: [] process_one_work+0x7bc/0x1670 kernel/workqueue.c:2089 1 lock held by syz-executor0/6469: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds+0x4e/0x110 fs/exec.c:1389 2 locks held by modprobe/6998: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 2 locks held by getty/7013: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 #1: (&ei->i_mmap_sem){++++}, at: [] ext4_filemap_fault+0x75/0xb0 fs/ext4/inode.c:6178 1 lock held by blkid/7015: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x868/0xb60 arch/x86/mm/fault.c:1361 ============================================= [31637] 0 31637 17667 8235 25 4 0 0 syz-executor4 [31677] 0 31677 17634 12692 32 3 0 1000 syz-executor3 [31756] 0 31756 17634 12692 32 3 0 1000 syz-executor3 [31832] 0 31832 17634 12692 32 3 0 1000 syz-executor3 [31902] 0 31902 17634 12692 32 3 0 1000 syz-executor3 [31975] 0 31975 17634 12692 32 3 0 1000 syz-executor3 [32029] 0 32029 17634 12692 32 3 0 1000 syz-executor3 [32075] 0 32075 17598 8202 25 3 0 0 syz-executor2 [32089] 0 32089 17667 12724 31 4 0 1000 syz-executor1 [32091] 0 32091 17634 12692 32 3 0 1000 syz-executor3 [32116] 0 32116 17634 8235 25 4 0 0 syz-executor0 [32141] 0 32141 17634 12692 32 3 0 1000 syz-executor3 [32209] 0 32209 17667 8220 25 4 0 0 syz-executor2 [32219] 0 32219 17634 12692 32 3 0 1000 syz-executor3 [32224] 0 32224 17667 8220 25 4 0 0 syz-executor2 [32261] 0 32261 17634 8234 25 5 0 1000 syz-executor1 [32283] 0 32283 17634 8233 32 4 0 0 syz-executor4 [32306] 0 32306 17634 12692 32 3 0 1000 syz-executor3 [32333] 0 32333 17667 8236 25 4 0 0 syz-executor2 [32362] 0 32362 17634 12692 32 3 0 1000 syz-executor3 [32433] 0 32433 17634 12692 32 3 0 1000 syz-executor3 [32575] 0 32575 17634 12692 32 3 0 1000 syz-executor3 [32632] 0 32632 17634 12692 32 3 0 1000 syz-executor3 [32698] 0 32698 17634 8234 25 4 0 0 syz-executor2 [32707] 0 32707 17634 12692 32 3 0 1000 syz-executor3 [32751] 0 32751 17601 8231 25 4 0 0 syz-executor4 [ 307] 0 307 17634 12692 32 3 0 1000 syz-executor3 [ 383] 0 383 17634 12692 32 3 0 1000 syz-executor3 NMI backtrace for cpu 0 CPU: 0 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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 1622 Comm: rs:main Q:Reg Not tainted 4.14.90+ #29 task: ffff8881d4a1c680 task.stack: ffff8881c3808000 RIP: 0010:compound_head include/linux/page-flags.h:149 [inline] RIP: 0010:PageUnevictable include/linux/page-flags.h:342 [inline] RIP: 0010:page_lru include/linux/mm_inline.h:118 [inline] RIP: 0010:putback_inactive_pages+0x2a2/0xd10 mm/vmscan.c:1713 RSP: 0000:ffff8881c380f178 EFLAGS: 00000046 RAX: 1ffffd4000c0c2ec RBX: ffffea0006061760 RCX: 1ffff1103b52ba50 RDX: 0000000000000000 RSI: ffffffffabe25380 RDI: ffff8881da95d280 RBP: ffffea0006061740 R08: 0000000000000001 R09: 0000000000000000 R10: ffff8881d4a1cf28 R11: 0000000000000001 R12: dead000000000100 R13: dffffc0000000000 R14: ffffea0006061740 R15: 0000000000000002 FS: 00007f2a9fb13700(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000045aba0 CR3: 00000001d489e005 CR4: 00000000001606a0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: shrink_inactive_list+0x4c9/0xee0 mm/vmscan.c:1833 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: (null) RSP: 2108940:0000000002108ae0 EFLAGS: 0215baa0 Code: f6 c4 01 0f 85 b0 06 00 00 e8 3b 65 e9 ff f0 80 4d 00 20 48 89 d8 48 c1 e8 03 42 80 3c 28 00 0f 85 85 08 00 00 4c 8b 23 4c 89 f5 <41> f6 c4 01 0f 85 93 06 00 00 e8 0f 65 e9 ff 48 89 e8 48 c1 e8 [ 424] 0 424 17667 8236 25 4 0 0 syz-executor5