INFO: task syz-executor.3:19742 blocked for more than 144 seconds.
Not tainted 6.1.56-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:25944 pid:19742 ppid:3595 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x106e/0x18d0 fs/fuse/dev.c:511
fuse_lookup_name+0x354/0x820 fs/fuse/dir.c:392
fuse_lookup+0x17e/0x600 fs/fuse/dir.c:433
fuse_atomic_open+0x19a/0x870 fs/fuse/dir.c:662
atomic_open fs/namei.c:3276 [inline]
lookup_open fs/namei.c:3384 [inline]
open_last_lookups fs/namei.c:3481 [inline]
path_openat+0xf4e/0x2e60 fs/namei.c:3711
do_filp_open+0x230/0x480 fs/namei.c:3741
do_sys_openat2+0x13b/0x500 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_creat fs/open.c:1410 [inline]
__se_sys_creat fs/open.c:1404 [inline]
__x64_sys_creat+0x11f/0x160 fs/open.c:1404
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe1e907cae9
RSP: 002b:00007fe1e9db80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007fe1e919bf80 RCX: 00007fe1e907cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020006580
RBP: 00007fe1e90c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fe1e919bf80 R15: 00007ffef8e89d68
INFO: task syz-executor.3:19745 blocked for more than 145 seconds.
Not tainted 6.1.56-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:25528 pid:19745 ppid:3595 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x142d/0x4550 kernel/sched/core.c:6554
schedule+0xbf/0x180 kernel/sched/core.c:6630
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6689
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:766 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1701
walk_component+0x2d0/0x400 fs/namei.c:1993
lookup_last fs/namei.c:2450 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2474
do_o_path+0x91/0x230 fs/namei.c:3685
path_openat+0x2884/0x2e60 fs/namei.c:3707
do_filp_open+0x230/0x480 fs/namei.c:3741
do_sys_openat2+0x13b/0x500 fs/open.c:1318
do_sys_open fs/open.c:1334 [inline]
__do_sys_open fs/open.c:1342 [inline]
__se_sys_open fs/open.c:1338 [inline]
__x64_sys_open+0x221/0x270 fs/open.c:1338
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe1e907cae9
RSP: 002b:00007fe1e9d970c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fe1e919c050 RCX: 00007fe1e907cae9
RDX: 0000000000000000 RSI: 00000000006c81c0 RDI: 0000000020000000
RBP: 00007fe1e90c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fe1e919c050 R15: 00007ffef8e89d68
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d12a170 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d12a970 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xe30 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8d129fa0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:306 [inline]
#0: ffffffff8d129fa0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d129fa0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6493
2 locks held by getty/3302:
#0: ffff888141662098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
3 locks held by kworker/u4:11/3880:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc900056efd20 ((work_completion)(&map->work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8d12f578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#2: ffffffff8d12f578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3b0/0x8a0 kernel/rcu/tree_exp.h:950
4 locks held by kworker/1:16/5353:
2 locks held by kworker/u4:19/7588:
3 locks held by syz-executor.3/19742:
#0: ffff88807a804460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff8880863dc4d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff8880863dc4d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3478 [inline]
#1: ffff8880863dc4d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7b6/0x2e60 fs/namei.c:3711
#2: ffff8880863dc938 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xcf/0x120 fs/fuse/inode.c:468
1 lock held by syz-executor.3/19745:
#0: ffff8880863dc4d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:766 [inline]
#0: ffff8880863dc4d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1701
2 locks held by kworker/1:3/19782:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc9000691fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
3 locks held by kworker/1:4/19783:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc90009a3fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffffffff8d12f578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#2: ffffffff8d12f578 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x479/0x8a0 kernel/rcu/tree_exp.h:950
3 locks held by kworker/1:6/19784:
#0: ffff8881401e1538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#1: ffffc90009a4fd20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267
#2: ffff8880226ca190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:836 [inline]
#2: ffff8880226ca190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1fe/0x5710 drivers/usb/core/hub.c:5739
1 lock held by udevd/20761:
2 locks held by syz-executor.0/21260:
1 lock held by syz-executor.2/21284:
#0: ffff8880b9839e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xa8/0x140 kernel/sched/core.c:545
1 lock held by syz-executor.2/21288:
1 lock held by syz-executor.5/21296:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.56-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 21297 Comm: syz-executor.1 Not tainted 6.1.56-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:check_preemption_disabled+0x63/0x110 lib/smp_processor_id.c:19
Code: 44 24 08 0f 85 c7 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24 00 02 00 00 <74> c9 49 89 f6 49 89 ff 65 4c 8b 25 0d 4e 79 75 41 f6 44 24 2f 04
RSP: 0018:ffffc90011f8efe8 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000000 RCX: ffffc90011f8f003
RDX: 0000000000000002 RSI: ffffffff8aebf3a0 RDI: ffffffff8b3cec00
RBP: ffffc90011f8f158 R08: dffffc0000000000 R09: fffffbfff1ce767e
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff920023f1e10
R13: 0000000000000246 R14: ffffc90011f8f0b0 R15: dffffc0000000000
FS: 00007fb009c286c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002031c030 CR3: 000000007bf7f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
lock_release+0x5cb/0xa20 kernel/locking/lockdep.c:5683
might_alloc include/linux/sched/mm.h:271 [inline]
prepare_alloc_pages+0x147/0x5b0 mm/page_alloc.c:5329
__alloc_pages+0x16a/0x770 mm/page_alloc.c:5548
__folio_alloc+0xf/0x30 mm/page_alloc.c:5591
vma_alloc_folio+0x486/0x990 mm/mempolicy.c:2241
alloc_page_vma include/linux/gfp.h:284 [inline]
wp_page_copy+0x25d/0x18c0 mm/memory.c:3119
handle_pte_fault mm/memory.c:5001 [inline]
__handle_mm_fault mm/memory.c:5125 [inline]
handle_mm_fault+0x2525/0x5340 mm/memory.c:5246
do_user_addr_fault arch/x86/mm/fault.c:1380 [inline]
handle_page_fault arch/x86/mm/fault.c:1471 [inline]
exc_page_fault+0x26f/0x660 arch/x86/mm/fault.c:1527
asm_exc_page_fault+0x22/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0010:__put_user_nocheck_4+0x3/0x11
Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 0f 1f 44 00 00 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 66 0f 1f 44 00 00 48 bb f9 ef ff ff ff 7f
RSP: 0018:ffffc90011f8f918 EFLAGS: 00050202
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 000000002031c030
RDX: ffff88807766bb80 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc90011f8fa90 R08: ffffffff8876542d R09: fffff520023f1edd
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002
R13: 000000002031c000 R14: 0000000000000000 R15: ffffffff89422780
____sys_recvmsg+0x363/0x530 net/socket.c:2714
___sys_recvmsg net/socket.c:2743 [inline]
do_recvmmsg+0x46d/0xad0 net/socket.c:2837
__sys_recvmmsg net/socket.c:2916 [inline]
__do_sys_recvmmsg net/socket.c:2939 [inline]
__se_sys_recvmmsg net/socket.c:2932 [inline]
__x64_sys_recvmmsg+0x195/0x240 net/socket.c:2932
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb008e7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb009c280c8 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007fb008f9c050 RCX: 00007fb008e7cae9
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007fb008ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb008f9c050 R15: 00007ffe6ca92278