[28380] 0 28380 18213 9597 26 3 0 0 syz-executor.3
[28420] 0 28420 18213 9469 26 3 0 0 syz-executor.3
[28466] 0 28466 18213 9421 26 3 0 0 syz-executor.3
[28497] 0 28497 18213 9775 27 3 0 0 syz-executor.3
INFO: task syz-executor.0:8393 blocked for more than 140 seconds.
Not tainted 4.14.151+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[28523] 0 28523 18213 9533 26 3 0 0 syz-executor.3
syz-executor.0 D25152 8393 8392 0x00000000
Call Trace:
[28545] 0 28545 18213 9757 27 3 0 0 syz-executor.3
[28581] 0 28581 18213 9469 26 3 0 0 syz-executor.3
[28631] 0 28631 18213 9629 26 3 0 0 syz-executor.3
[28665] 0 28665 18213 9486 26 3 0 0 syz-executor.3
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
[28697] 0 28697 18213 9656 26 3 0 0 syz-executor.3
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
[28727] 0 28727 18213 9565 26 3 0 0 syz-executor.3
[28784] 0 28784 18213 9710 26 3 0 0 syz-executor.3
[28822] 0 28822 18213 9933 27 3 0 0 syz-executor.3
[28854] 0 28854 18213 9547 26 3 0 0 syz-executor.3
xt_find_table_lock+0x35/0x3d0 net/netfilter/x_tables.c:1092
[28877] 0 28877 18213 8752 27 4 0 0 syz-executor.0
[28891] 0 28891 18213 9933 27 3 0 0 syz-executor.3
get_info+0x10d/0x570 net/ipv6/netfilter/ip6_tables.c:983
[28928] 0 28928 18213 9564 26 3 0 0 syz-executor.3
[28962] 0 28962 18213 9773 27 3 0 0 syz-executor.3
do_ipt_get_ctl+0x136/0x790 net/ipv4/netfilter/ip_tables.c:1698
[29010] 0 29010 18213 9405 26 3 0 0 syz-executor.3
[29047] 0 29047 18213 9845 27 3 0 0 syz-executor.3
[29085] 0 29085 18213 9453 26 3 0 0 syz-executor.3
nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
nf_getsockopt+0x68/0xc0 net/netfilter/nf_sockopt.c:122
[29129] 0 29129 18213 9821 27 3 0 0 syz-executor.3
ip_getsockopt net/ipv4/ip_sockglue.c:1566 [inline]
ip_getsockopt+0x118/0x160 net/ipv4/ip_sockglue.c:1551
[29164] 0 29164 18213 9357 26 3 0 0 syz-executor.3
tcp_getsockopt net/ipv4/tcp.c:3249 [inline]
tcp_getsockopt+0x81/0xc0 net/ipv4/tcp.c:3243
SYSC_getsockopt net/socket.c:1896 [inline]
SyS_getsockopt+0x11d/0x1f0 net/socket.c:1878
[29183] 0 29183 18246 8753 26 4 0 0 syz-executor.0
[29220] 0 29220 18213 9645 26 3 0 0 syz-executor.3
[29260] 0 29260 18213 9501 26 3 0 0 syz-executor.3
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45cd2a
[29297] 0 29297 18213 9693 26 3 0 0 syz-executor.3
RSP: 002b:00007ffda7ecc608 EFLAGS: 00000246 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 00007ffda7ecc630 RCX: 000000000045cd2a
[29326] 0 29326 18213 9149 25 3 0 0 syz-executor.3
[29363] 0 29363 18213 9677 26 3 0 0 syz-executor.3
RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003
[29387] 0 29387 18213 9901 27 3 0 0 syz-executor.3
RBP: 0000000000716e80 R08: 00007ffda7ecc62c R09: 0000000000004000
R10: 00007ffda7ecc630 R11: 0000000000000246 R12: 0000000000000003
[29568] 0 29568 18213 9709 26 3 0 0 syz-executor.3
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000714cc0
[29605] 0 29605 18213 9741 27 3 0 0 syz-executor.3
INFO: task blkid:738 blocked for more than 140 seconds.
[29632] 0 29632 18213 9677 26 3 0 0 syz-executor.3
Not tainted 4.14.151+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[29653] 0 29653 18213 9798 27 3 0 0 syz-executor.3
blkid D25936 738 732 0x00000000
[29845] 0 29845 18213 9661 26 3 0 0 syz-executor.3
Call Trace:
[29882] 0 29882 18213 9485 26 3 0 0 syz-executor.3
[29923] 0 29923 18213 9645 26 3 0 0 syz-executor.3
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
[29956] 0 29956 18213 9949 27 3 0 0 syz-executor.3
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
[30033] 0 30033 18213 9629 26 3 0 0 syz-executor.3
[30083] 0 30083 18213 9549 26 3 0 0 syz-executor.3
[30110] 0 30110 18213 9337 26 3 0 0 syz-executor.3
[30126] 0 30126 18213 9768 27 3 0 0 syz-executor.3
kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301
do_inode_permission fs/namei.c:389 [inline]
__inode_permission2+0x22c/0x2c0 fs/namei.c:431
[30154] 0 30154 18213 9933 27 3 0 0 syz-executor.3
inode_permission2+0x2d/0x100 fs/namei.c:488
may_lookup fs/namei.c:1815 [inline]
link_path_walk+0x8a6/0x1110 fs/namei.c:2195
[30354] 0 30354 18213 9730 27 3 0 0 syz-executor.3
[30387] 0 30387 18213 9421 26 3 0 0 syz-executor.3
path_openat+0x178/0x2be0 fs/namei.c:3680
[30430] 0 30430 18213 9869 27 3 0 0 syz-executor.3
[30455] 0 30455 18213 9981 27 3 0 0 syz-executor.3
[30484] 0 30484 18213 9629 26 3 0 0 syz-executor.3
do_filp_open+0x1a1/0x280 fs/namei.c:3715
[30522] 0 30522 18213 9517 26 3 0 0 syz-executor.3
[30565] 0 30565 18213 9629 26 3 0 0 syz-executor.3
do_sys_open+0x2ca/0x590 fs/open.c:1096
[30600] 0 30600 18213 9874 27 3 0 0 syz-executor.3
[30622] 0 30622 18213 9901 27 3 0 0 syz-executor.3
[30647] 0 30647 18213 9991 27 3 0 0 syz-executor.3
[30680] 0 30680 18213 9773 27 3 0 0 syz-executor.3
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x7f4b4fca1120
[30715] 0 30715 18213 9581 26 3 0 0 syz-executor.3
RSP: 002b:00007fff84540ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[30752] 0 30752 18213 9677 26 3 0 0 syz-executor.3
RAX: ffffffffffffffda RBX: 00007fff84541b30 RCX: 00007f4b4fca1120
RDX: 00007fff84540b02 RSI: 0000000000000000 RDI: 00007fff84540af0
[30789] 0 30789 18213 9773 27 3 0 0 syz-executor.3
[30864] 0 30864 18213 9165 25 3 0 0 syz-executor.3
[30914] 0 30914 18213 9723 26 3 0 0 syz-executor.3
[30940] 0 30940 18213 9917 27 3 0 0 syz-executor.3
RBP: 0000000000000704 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000001000
R13: 0000000000000000 R14: 00007f4b50182820 R15: 00007f4b4ff782a2
[30961] 0 30961 18213 10094 27 3 0 0 syz-executor.3
[30972] 0 30972 18213 10008 27 3 0 0 syz-executor.3
[30992] 0 30992 18213 9789 27 3 0 0 syz-executor.3
[31019] 0 31019 18213 9789 27 3 0 0 syz-executor.3
INFO: task udevd:766 blocked for more than 140 seconds.
[31048] 0 31048 18213 9613 26 3 0 0 syz-executor.3
[31067] 0 31067 18246 12814 32 3 0 0 syz-executor.3
[31085] 0 31085 18213 9373 26 3 0 0 syz-executor.3
[31120] 0 31120 18213 12812 32 3 0 0 syz-executor.3
[31143] 0 31143 18213 8752 26 4 0 0 syz-executor.0
[31147] 0 31147 18213 10020 27 3 0 0 syz-executor.3
[31166] 0 31166 18246 12814 32 3 0 0 syz-executor.3
[31186] 0 31186 18213 9101 25 3 0 0 syz-executor.3
Not tainted 4.14.151+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[31219] 0 31219 18246 12814 32 3 0 0 syz-executor.3
udevd D29376 766 190 0x00000000
Call Trace:
[31249] 0 31249 18213 9605 26 3 0 0 syz-executor.3
[31265] 0 31265 18246 12814 32 3 0 0 syz-executor.3
[31276] 0 31276 18213 9709 26 3 0 0 syz-executor.3
schedule+0x92/0x1c0 kernel/sched/core.c:3498
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3556
[31294] 0 31294 18279 12816 32 3 0 0 syz-executor.3
[31307] 0 31307 18213 9805 27 3 0 0 syz-executor.3
__mutex_lock_common kernel/locking/mutex.c:833 [inline]
__mutex_lock+0x595/0x13e0 kernel/locking/mutex.c:893
[31314] 0 31314 18279 12816 32 3 0 0 syz-executor.3
[31323] 0 31323 18213 9597 26 3 0 0 syz-executor.3
[31345] 0 31345 18213 12812 32 3 0 0 syz-executor.3
kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301
do_inode_permission fs/namei.c:389 [inline]
__inode_permission2+0x22c/0x2c0 fs/namei.c:431
inode_permission2+0x2d/0x100 fs/namei.c:488
[31364] 0 31364 18180 8715 25 3 0 0 syz-executor.3
may_lookup fs/namei.c:1815 [inline]
link_path_walk+0x8a6/0x1110 fs/namei.c:2195
[31395] 0 31395 18246 8737 26 3 0 0 syz-executor.3
path_lookupat.isra.0+0xde/0x7e0 fs/namei.c:2440
[31582] 0 31582 18213 9725 26 3 0 0 syz-executor.3
[31597] 0 31597 18246 12814 32 3 0 0 syz-executor.3
[31622] 0 31622 18213 9533 26 3 0 0 syz-executor.3
filename_lookup+0x1a1/0x3b0 fs/namei.c:2475
[31647] 0 31647 18246 12814 32 3 0 0 syz-executor.3
[31672] 0 31672 18213 9597 26 3 0 0 syz-executor.3
SYSC_readlinkat fs/stat.c:394 [inline]
SyS_readlinkat+0xbe/0x2b0 fs/stat.c:382
[31691] 0 31691 18279 12816 32 3 0 0 syz-executor.3
[31711] 0 31711 18213 9181 25 3 0 0 syz-executor.3
do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x42/0xb7
[31742] 0 31742 18213 9469 26 3 0 0 syz-executor.3
RIP: 0033:0x7fba4b4e4577
RSP: 002b:00007ffd9cfde9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000059
RAX: ffffffffffffffda RBX: 0000000001705030 RCX: 00007fba4b4e4577
[31785] 0 31785 18213 9725 26 3 0 0 syz-executor.3
[31803] 0 31803 18246 12814 32 3 0 0 syz-executor.3
[31847] 0 31847 18213 9756 27 3 0 0 syz-executor.3
RDX: 0000000000000400 RSI: 00007ffd9cfde9c0 RDI: 00007ffd9cfdeea0
RBP: 000000000178ede0 R08: 7665642f7379732f R09: 7269762f73656369
[31874] 0 31874 18279 12816 32 3 0 0 syz-executor.3
R10: 6f6c622f6c617574 R11: 0000000000000246 R12: 00007ffd9cfdeea0
[31912] 0 31912 18213 9351 26 3 0 0 syz-executor.3
R13: 0000000000000400 R14: 0000000001705030 R15: 000000000000000b
Showing all locks held in the system:
1 lock held by init/1:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
1 lock held by khungtaskd/23:
#0: (tasklist_lock){.+.+}, at: [<000000001b122378>] debug_show_all_locks+0x7c/0x21a kernel/locking/lockdep.c:4544
3 locks held by rs:main Q:Reg/1629:
#0: (&f->f_pos_lock){+.+.}, at: [<0000000037195d7c>] __fdget_pos+0xb5/0xd0 fs/file.c:769
#1: (sb_writers#4){.+.+}, at: [<000000002897eeda>] file_start_write include/linux/fs.h:2746 [inline]
#1: (sb_writers#4){.+.+}, at: [<000000002897eeda>] vfs_write+0x3d8/0x4d0 fs/read_write.c:545
#2: (&sb->s_type->i_mutex_key#9){++++}, at: [<00000000b6eb3cb7>] inode_trylock include/linux/fs.h:744 [inline]
#2: (&sb->s_type->i_mutex_key#9){++++}, at: [<00000000b6eb3cb7>] ext4_file_write_iter+0x1b0/0xdb0 fs/ext4/file.c:234
1 lock held by rsyslogd/1632:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
2 locks held by getty/1759:
#0: (&tty->ldisc_sem){++++}, at: [<00000000639bd268>] tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:284
#1: (&ldata->atomic_read_lock){+.+.}, at: [<0000000047954d33>] n_tty_read+0x1f7/0x1700 drivers/tty/n_tty.c:2156
1 lock held by syz-fuzzer/1778:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
1 lock held by syz-fuzzer/1790:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
1 lock held by syz-fuzzer/1791:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
1 lock held by syz-executor.2/1841:
#0: (&xt[i].mutex){+.+.}, at: [<0000000009e27750>] xt_find_table_lock+0x35/0x3d0 net/netfilter/x_tables.c:1092
1 lock held by syz-executor.3/6814:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
1 lock held by syz-executor.0/8393:
#0: (&xt[i].mutex){+.+.}, at: [<0000000009e27750>] xt_find_table_lock+0x35/0x3d0 net/netfilter/x_tables.c:1092
1 lock held by syz-executor.4/2304:
#0: (&ei->i_mmap_sem){++++}, at: [<00000000a9443899>] ext4_filemap_fault+0x7c/0xb0 fs/ext4/inode.c:6232
2 locks held by kworker/1:6/22688:
#0: ("events"){+.+.}, at: [<000000000e8bb649>] process_one_work+0x6ff/0x1580 kernel/workqueue.c:2105
#1: (xfrm_state_gc_work){+.+.}, at: [<0000000070dbbfd5>] process_one_work+0x735/0x1580 kernel/workqueue.c:2109
1 lock held by syz-executor.1/32002:
#0: (&xt[i].mutex){+.+.}, at: [<0000000009e27750>] xt_find_table_lock+0x35/0x3d0 net/netfilter/x_tables.c:1092
1 lock held by blkid/738:
#0: (kernfs_mutex){+.+.}, at: [<000000006fb85f2f>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301
1 lock held by udevd/766:
#0: (kernfs_mutex){+.+.}, at: [<000000006fb85f2f>] kernfs_iop_permission+0x4e/0x90 fs/kernfs/inode.c:301
1 lock held by udevd/767:
#0: (&mm->mmap_sem){++++}, at: [<00000000187ac765>] __do_page_fault+0x282/0xbb0 arch/x86/mm/fault.c:1349
=============================================
[31939] 0 31939 18246 12813 32 3 0 0 syz-executor.3
[31987] 0 31987 18213 9848 27 3 0 0 syz-executor.3
NMI backtrace for cpu 0
CPU: 0 PID: 23 Comm: khungtaskd Not tainted 4.14.151+ #0
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
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
[31990] 0 31990 18246 12814 32 3 0 0 syz-executor.3
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 757 Comm: udevd Not tainted 4.14.151+ #0
task: 0000000080de3f43 task.stack: 000000007d27a6f6
RIP: 0010:__sanitizer_cov_trace_pc+0x23/0x60 kernel/kcov.c:68
RSP: 0000:ffff888007436f68 EFLAGS: 00000046
RAX: ffff8881a1a2af00 RBX: 0000607e2420b220 RCX: 0000000000000005
RDX: 0000000000000000 RSI: ffffffffb494a640 RDI: ffffffffb494a680
RBP: ffffffffb494a680 R08: 0000000000000000 R09: fffffbfff6a4600e
R10: fffffbfff6a4600d R11: ffffffffb523006b R12: 0000000000000001
R13: ffffffffb494a640 R14: ffffffffb4ec0d60 R15: ffff888007437058
FS: 00007fba4bddb7a0(0000) GS:ffff8881dbb00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000404d65 CR3: 0000000020bfe004 CR4: 00000000001606a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
check_preemption_disabled+0x35/0x1f0 lib/smp_processor_id.c:52
perf_trace_lock+0x11e/0x4e0 include/trace/events/lock.h:39
trace_lock_release include/trace/events/lock.h:58 [inline]
lock_release+0x4e9/0x740 kernel/locking/lockdep.c:4012
rcu_lock_release include/linux/rcupdate.h:247 [inline]
rcu_read_unlock include/linux/rcupdate.h:685 [inline]
page_evictable+0x145/0x1f0 mm/vmscan.c:3982
putback_inactive_pages+0x259/0xd70 mm/vmscan.c:1713
shrink_inactive_list+0x563/0x1130 mm/vmscan.c:1843
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:3659 [inline]
__alloc_pages_direct_reclaim mm/page_alloc.c:3681 [inline]
__alloc_pages_slowpath mm/page_alloc.c:4068 [inline]
__alloc_pages_nodemask+0xaee/0x2370 mm/page_alloc.c:4277
__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]
wp_page_copy+0x16d/0x1610 mm/memory.c:2502
do_wp_page+0x273/0x19d0 mm/memory.c:2784
handle_pte_fault mm/memory.c:4005 [inline]
__handle_mm_fault+0xdec/0x2700 mm/memory.c:4113
handle_mm_fault+0x2f1/0x6da mm/memory.c:4150
__do_page_fault+0x477/0xbb0 arch/x86/mm/fault.c:1420
page_fault+0x42/0x50 arch/x86/entry/entry_64.S:1122
RIP: 170fd70:0x7fba4bde6040
RSP: 9cfdfb40:00007ffd9cfdfba0 EFLAGS: 00000000
Code: 00 00 e9 90 ed ff ff 90 65 48 8b 04 25 c0 de 01 00 48 85 c0 74 1a 65 8b 15 eb bc 30 4d 81 e2 00 01 1f 00 75 0b 8b 90 a8 11 00 00 <83> fa 01 74 01 c3 48 c7 c2 00 00 00 81 48 81 ea 00 00 a0 b2 48