[19039] 0 19039 17618 12709 31 3 0 1000 syz-executor3 [19109] 0 19109 17618 12709 31 3 0 1000 syz-executor3 [19186] 0 19186 17618 12709 31 3 0 1000 syz-executor3 [19248] 0 19248 17618 12709 31 3 0 1000 syz-executor3 [19303] 0 19303 17618 12709 31 3 0 1000 syz-executor3 INFO: task syz-executor1:30563 blocked for more than 140 seconds. Not tainted 4.14.89+ #26 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [19355] 0 19355 17585 8233 24 3 0 0 syz-executor1 syz-executor1 D30248 30563 1848 0x00000004 Call Trace: [19359] 0 19359 17618 8235 24 3 0 0 syz-executor1 [19362] 0 19362 17618 12709 31 3 0 1000 syz-executor3 [19425] 0 19425 17618 12709 31 3 0 1000 syz-executor3 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 __lock_sock+0x11d/0x210 net/core/sock.c:2237 [19500] 0 19500 17618 12709 31 3 0 1000 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 [19517] 0 19517 17684 8434 25 4 0 0 syz-executor1 [19566] 0 19566 17618 12709 31 3 0 1000 syz-executor3 [19627] 0 19627 17618 12709 31 3 0 1000 syz-executor3 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [19713] 0 19713 17618 12709 31 3 0 1000 syz-executor3 [19769] 0 19769 17618 12709 31 3 0 1000 syz-executor3 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 [19804] 0 19804 17585 8426 25 4 0 0 syz-executor1 entry_SYSCALL_64_after_hwframe+0x42/0xb7 [19828] 0 19828 17618 12709 31 3 0 1000 syz-executor3 [19868] 0 19868 17618 12709 31 3 0 0 syz-executor1 RIP: 0033:0x457669 [19876] 0 19876 17618 12709 31 3 0 1000 syz-executor3 RSP: 002b:00007fce01295c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [19894] 0 19894 17680 12801 31 3 0 0 syz-executor1 [19910] 0 19910 17618 12709 31 3 0 1000 syz-executor3 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000072bfa0 R08: 0000000000000010 R09: 0000000000000000 [19951] 0 19951 17651 8234 24 3 0 0 syz-executor2 [19952] 0 19952 17651 8234 24 3 0 0 syz-executor2 R10: 0000000020000000 R11: 0000000000000246 R12: 00007fce012966d4 [20000] 0 20000 17750 8402 25 4 0 1000 syz-executor0 R13: 00000000004c4eba R14: 00000000004d8f70 R15: 00000000ffffffff [20006] 0 20006 17618 8415 27 4 0 1000 syz-executor5 INFO: task syz-executor1:30570 blocked for more than 140 seconds. Not tainted 4.14.89+ #26 [20012] 0 20012 17618 12709 31 3 0 1000 syz-executor3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor1 D28328 30570 1848 0x00000004 [20077] 0 20077 17618 12709 31 3 0 1000 syz-executor3 [20118] 0 20118 17618 12709 31 3 0 1000 syz-executor3 Call Trace: [20178] 0 20178 17618 12709 31 3 0 1000 syz-executor3 [20228] 0 20228 17618 12709 31 3 0 1000 syz-executor3 schedule+0x7f/0x1b0 kernel/sched/core.c:3490 [20244] 0 20244 17585 8230 24 3 0 0 syz-executor2 __lock_sock+0x11d/0x210 net/core/sock.c:2237 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 SYSC_setsockopt net/socket.c:1864 [inline] SyS_setsockopt+0x132/0x220 net/socket.c:1843 [20248] 0 20248 17651 8410 25 4 0 0 syz-executor2 [20324] 0 20324 17618 12709 31 3 0 1000 syz-executor3 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289 entry_SYSCALL_64_after_hwframe+0x42/0xb7 [20363] 0 20363 17650 8411 25 4 0 0 syz-executor2 RIP: 0033:0x457669 RSP: 002b:00007fce01274c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 [20375] 0 20375 17618 12709 31 3 0 1000 syz-executor3 [20460] 0 20460 17651 8411 25 4 0 0 syz-executor2 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 RDX: 0000000000000005 RSI: 0000000000000107 RDI: 0000000000000003 RBP: 000000000072c040 R08: 0000000000000010 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 00007fce012756d4 R13: 00000000004c4eba R14: 00000000004d8f70 R15: 00000000ffffffff Showing all locks held in the system: [20468] 0 20468 17651 8411 25 4 0 0 syz-executor2 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 [20470] 0 20470 17618 12709 31 3 0 1000 syz-executor3 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 rs:main Q:Reg/1629: #0: (&mm->mmap_sem){++++}, at: [] __do_page_fault+0x868/0xb60 arch/x86/mm/fault.c:1361 1 lock held by rsyslogd/1631: #0: (&mm->mmap_sem){++++}, at: [] do_mprotect_pkey mm/mprotect.c:469 [inline] #0: (&mm->mmap_sem){++++}, at: [] SYSC_mprotect mm/mprotect.c:566 [inline] #0: (&mm->mmap_sem){++++}, at: [] SyS_mprotect+0x16f/0x610 mm/mprotect.c:563 2 locks held by getty/1759: #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 ============================================= [20498] 0 20498 17585 8423 25 4 0 0 syz-executor2 [20527] 0 20527 17618 12709 31 3 0 1000 syz-executor3 [20572] 0 20572 17585 8221 23 3 0 0 syz-executor2 [20573] 0 20573 17618 12709 31 3 0 1000 syz-executor3 NMI backtrace for cpu 0 [20588] 0 20588 17585 8231 24 3 0 0 syz-executor2 CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.89+ #26 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 [20661] 0 20661 17618 12709 31 3 0 1000 syz-executor3 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: 1784 Comm: syz-fuzzer Not tainted 4.14.89+ #26 task: ffff8881d1a58000 task.stack: ffff8881d0228000 RIP: 0010:__read_once_size include/linux/compiler.h:183 [inline] RIP: 0010:trace_lock_release include/trace/events/lock.h:58 [inline] RIP: 0010:lock_release+0x463/0x720 kernel/locking/lockdep.c:4009 RSP: 0000:ffff8881d022f3d8 EFLAGS: 00000083 RAX: 0000000000000001 RBX: 1ffff1103a045e7e RCX: 1ffff1103a34b105 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881d1a5882c RBP: ffff8881d1a58000 R08: 0000000000002e0d R09: 0000000000000000 R10: ffff8881d1a588a8 R11: 0000000000000001 R12: 0000000000000010 R13: ffff8881d022f5c0 R14: ffff8881da1cd3d8 R15: 0000000000000000 FS: 000000c420026068(0000) GS:ffff8881db900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000445ae0 CR3: 00000001d36fc006 CR4: 00000000001606a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: __raw_spin_unlock include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock+0x17/0x40 kernel/locking/spinlock.c:184 spin_unlock include/linux/spinlock.h:357 [inline] __list_lru_count_one mm/list_lru.c:174 [inline] list_lru_count_one+0x12d/0x1d0 mm/list_lru.c:182 list_lru_shrink_count include/linux/list_lru.h:117 [inline] super_cache_count+0x139/0x2a0 fs/super.c:143 do_shrink_slab mm/vmscan.c:328 [inline] shrink_slab.part.8+0x25c/0xa30 mm/vmscan.c:504 shrink_slab mm/vmscan.c:468 [inline] shrink_node+0x8c8/0xbf0 mm/vmscan.c:2665 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: 1586208:000000c420035fb0 EFLAGS: 00430120 Code: fc ff ff e8 11 fe df ff e9 db fc ff ff 65 8b 05 84 5d 01 68 89 c0 48 0f a3 05 32 7d 63 02 0f 83 c4 fc ff ff 65 ff 05 8d ba 01 68 <4c> 8b 25 76 ca 62 02 e8 b1 f4 03 00 85 c0 74 0d 80 3d df a8 62 [20745] 0 20745 17618 12709 31 3 0 1000 syz-executor3 [20799] 0 20799 17618 12709 31 3 0 1000 syz-executor3 [20849] 0 20849 17618 12709 31 3 0 1000 syz-executor3 [20897] 0 20897 17618 12709 31 3 0 1000 syz-executor3 [20903] 0 20903 17684 12512 32 4 0 0 syz-executor1 [20962] 0 20962 17618 12709 31 3 0 1000 syz-executor3 [21017] 0 21017 17618 8409 25 4 0 0 syz-executor2 [21024] 0 21024 17618 12709 31 3 0 0 syz-executor1 [21026] 0 21026 17618 12709 31 3 0 1000 syz-executor3 [21036] 0 21036 17680 12767 31 3 0 0 syz-executor1 [21062] 0 21062 17618 8411 26 4 0 1000 syz-executor0 [21086] 0 21086 17618 12709 31 3 0 1000 syz-executor3