[ 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: [<ffffffff99004837>] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541
2 locks held by getty/1754:
#0: (&tty->ldisc_sem){++++}, at: [<ffffffff99b40c20>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
#1: (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff99b3c07f>] 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