[21633] 0 21633 17667 8199 31 3 0 1000 syz-executor0 [21653] 0 21653 17601 8195 24 3 0 1000 syz-executor0 [21692] 0 21692 17634 12692 31 3 0 0 syz-executor2 [21698] 0 21698 17766 8205 26 3 0 1000 syz-executor0 [21704] 0 21704 17601 8195 24 3 0 1000 syz-executor0 INFO: task syz-executor1:4273 blocked for more than 140 seconds. Not tainted 4.14.90+ #29 [21708] 0 21708 17700 8201 27 3 0 1000 syz-executor0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [21726] 0 21726 17601 8204 24 3 0 1000 syz-executor0 [21733] 0 21733 17601 8229 25 4 0 1000 syz-executor3 syz-executor1 D29768 4273 1846 0x00000004 Call Trace: schedule+0x7f/0x1b0 kernel/sched/core.c:3490 [21744] 0 21744 17601 8229 25 4 0 1000 syz-executor3 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [21751] 0 21751 17601 8196 23 3 0 1000 syz-executor3 lock_sock_nested+0xe3/0x100 net/core/sock.c:2758 [21778] 0 21778 17634 12692 31 3 0 0 syz-executor2 lock_sock include/net/sock.h:1452 [inline] packet_setsockopt+0x70a/0x2680 net/packet/af_packet.c:3794 [21783] 0 21783 17733 8212 31 3 0 1000 syz-executor0 [21800] 0 21800 17601 8195 24 3 0 1000 syz-executor0 [21805] 0 21805 17634 8197 24 3 0 1000 syz-executor0 [21820] 0 21820 17601 8195 24 3 0 1000 syz-executor0 [21829] 0 21829 17634 12692 31 3 0 0 syz-executor2 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [21835] 0 21835 17766 8205 29 3 0 1000 syz-executor0 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x4579b9 RSP: 002b:00007f1ee6b00c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000004579b9 [21855] 0 21855 17601 8195 24 3 0 1000 syz-executor0 RDX: 0000000000000009 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000073bfa0 R08: 0000000000000004 R09: 0000000000000000 R10: 00000000200001c0 R11: 0000000000000246 R12: 00007f1ee6b016d4 R13: 00000000004c5805 R14: 00000000004da080 R15: 00000000ffffffff Showing all locks held in the system: 2 locks held by init/1: [21892] 0 21892 17601 8197 24 3 0 0 syz-executor1 #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 [21893] 0 21893 17634 12692 31 3 0 0 syz-executor2 1 lock held by khungtaskd/23: #0: (tasklist_lock){.+.+}, at: [] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541 1 lock held by rsyslogd/1628: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x26d/0xb60 arch/x86/mm/fault.c:1354 [21896] 0 21896 17733 8204 31 3 0 1000 syz-executor0 2 locks held by getty/1756: #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 [21912] 0 21912 17601 8195 24 3 0 1000 syz-executor0 2 locks held by syz-fuzzer/1781: #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 [21916] 0 21916 17601 8197 24 3 0 0 syz-executor1 ============================================= 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: 1781 Comm: syz-fuzzer Not tainted 4.14.90+ #29 task: ffff8881d1302f00 task.stack: ffff8881d07d8000 RIP: 0010:__lock_acquire+0x43a/0x4320 kernel/locking/lockdep.c:3437 RSP: 0000:ffff8881d07deee0 EFLAGS: 00000006 RAX: 000000000000000a RBX: 0000000000000025 RCX: 000000000000000a RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881d13037cc RBP: ffff8881d07df0d0 R08: 0000000000000000 R09: 0000000000000008 R10: ffff8881d13037a8 R11: 1ffff1103a2606f4 R12: 0000000000000003 R13: ffff8881d130371c R14: 0000000000000000 R15: ffff8881d1302f00 FS: 000000c420026068(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb4dbd07dd3 CR3: 00000001d012c001 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x10f/0x380 kernel/locking/lockdep.c:3991 rcu_lock_acquire include/linux/rcupdate.h:244 [inline] rcu_read_lock include/linux/rcupdate.h:631 [inline] page_evictable+0x39/0x200 mm/vmscan.c:3967 putback_inactive_pages+0x240/0xd10 mm/vmscan.c:1703 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: 00f1:0x11 RSP: 0007:000000c420035fb0 EFLAGS: 00430120 Code: c0 83 e2 03 83 e0 01 41 09 f6 c1 e0 02 45 88 72 21 83 e1 f8 09 d1 09 c1 83 e1 f7 44 09 c9 41 88 4a 22 0f b7 55 20 41 0f b7 42 22 e2 04 83 e0 0f 09 d0 48 89 fa 66 41 89 42 22 48 c1 ea 03 48