INFO: task syz.0.201:6687 blocked for more than 143 seconds.
Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.201 state:D stack:21776 pid:6687 tgid:6687 ppid:5836 task_flags:0x400040 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
request_wait_answer fs/fuse/dev.c:453 [inline]
__fuse_request_send fs/fuse/dev.c:467 [inline]
__fuse_simple_request+0xe2a/0x1850 fs/fuse/dev.c:561
fuse_simple_request fs/fuse/fuse_i.h:1197 [inline]
fuse_flush+0x6c0/0x990 fs/fuse/file.c:557
filp_flush+0xb9/0x190 fs/open.c:1540
filp_close+0x1e/0x40 fs/open.c:1553
__range_close fs/file.c:746 [inline]
__do_sys_close_range fs/file.c:805 [inline]
__se_sys_close_range+0x38b/0x6d0 fs/file.c:769
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f37f7d8d169
RSP: 002b:00007ffde5d4f148 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f37f7fa7ba0 RCX: 00007f37f7d8d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f37f7fa7ba0 R08: 00000000000001e8 R09: 0000001be5d4f43f
R10: 00007f37f7fa7ac0 R11: 0000000000000246 R12: 000000000002918a
R13: 00007f37f7fa6160 R14: ffffffffffffffff R15: 00007ffde5d4f260
Showing all locks held in the system:
6 locks held by kworker/1:0/25:
#0: ffff88814047dd48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88814047dd48 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc900001f7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc900001f7c60 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffff8880292e3190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#2: ffff8880292e3190 (&dev->mutex){....}-{4:4}, at: hub_event+0x1fe/0x5150 drivers/usb/core/hub.c:5861
#3: ffff88807e5df190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#3: ffff88807e5df190 (&dev->mutex){....}-{4:4}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#4: ffff888049682160 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#4: ffff888049682160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x8e/0x520 drivers/base/dd.c:1005
#5: ffff8880253cce60 (&dev->phy_mutex){+.+.}-{4:4}, at: mcs7830_write_phy+0xe3/0x390 drivers/net/usb/mcs7830.c:227
1 lock held by khungtaskd/30:
#0: ffffffff8eb38fa0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb38fa0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb38fa0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
2 locks held by getty/5584:
#0: ffff888031db50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
4 locks held by udevd/5833:
#0: ffff888031ef31c8 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb4/0xd70 fs/seq_file.c:182
#1: ffff88806dfae488 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x53/0x3b0 fs/kernfs/file.c:154
#2: ffff888077c98878 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x72/0x3b0 fs/kernfs/file.c:155
#3: ffff88807e5df190 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1030 [inline]
#3: ffff88807e5df190 (&dev->mutex){....}-{4:4}, at: uevent_show+0x17d/0x340 drivers/base/core.c:2729
6 locks held by kworker/0:4/5893:
3 locks held by kworker/u8:25/6950:
4 locks held by syz-executor/7913:
2 locks held by syz.4.598/8406:
4 locks held by syz.5.601/8420:
1 lock held by syz.2.607/8449:
2 locks held by sed/8448:
1 lock held by syz.9.608/8450:
#0: ffff88802abc5be0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:152 [inline]
#0: ffff88802abc5be0 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x182/0x430 mm/util.c:573
4 locks held by syz.9.608/8453:
3 locks held by syz.6.606/8454:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7ab/0x920 kernel/kthread.c:464
ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8453 Comm: syz.9.608 Not tainted 6.14.0-rc5-syzkaller-00013-g99fa936e8e4f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x6dc/0x22d0 arch/x86/kernel/unwind_orc.c:494
Code: c1 e8 3f 48 01 c8 48 83 e0 fe 49 8d 1c 46 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 27 48 63 03 <48> 01 d8 48 8d 4b 04 4c 39 f8 4c 0f 46 f1 48 8d 43 fc 48 0f 47 e8
RSP: 0018:ffffc900055767b0 EFLAGS: 00000246
RAX: fffffffff1ba37a2 RBX: ffffffff90576368 RCX: dffffc0000000000
RDX: 00000000000b0c57 RSI: ffffffff90d21874 RDI: ffffffff816d1530
RBP: ffffffff90576368 R08: 0000000000000001 R09: ffffc90005576970
R10: dffffc0000000000 R11: ffffffff81ad4ae0 R12: ffffffff90576368
R13: ffffffff90576368 R14: ffffffff90576368 R15: ffffffff82119c36
FS: 00007eff583656c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002918e000 CR4: 0000000000350ef0
Call Trace:
arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
save_stack+0xfb/0x1f0 mm/page_owner.c:156
__set_page_owner+0x89/0x530 mm/page_owner.c:320
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
prep_new_page mm/page_alloc.c:1559 [inline]
get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477
__alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739
alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270
folio_alloc_mpol_noprof+0x36/0x70 mm/mempolicy.c:2289
shmem_alloc_folio mm/shmem.c:1863 [inline]
shmem_alloc_and_add_folio+0x4a0/0x1090 mm/shmem.c:1902
shmem_get_folio_gfp+0x621/0x1840 mm/shmem.c:2522
shmem_fault+0x220/0x5b0 mm/shmem.c:2723
__do_fault+0x137/0x390 mm/memory.c:4988
do_read_fault mm/memory.c:5403 [inline]
do_fault mm/memory.c:5537 [inline]
do_pte_missing mm/memory.c:4058 [inline]
handle_pte_fault mm/memory.c:5900 [inline]
__handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6043
handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6212
faultin_page mm/gup.c:1196 [inline]
__get_user_pages+0x1a92/0x4140 mm/gup.c:1491
populate_vma_page_range+0x264/0x330 mm/gup.c:1929
__mm_populate+0x27a/0x460 mm/gup.c:2032
mm_populate include/linux/mm.h:3386 [inline]
vm_mmap_pgoff+0x303/0x430 mm/util.c:580
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff5758d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007eff58365038 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007eff577a5fa0 RCX: 00007eff5758d169
RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000400000000000
RBP: 00007eff5760e2a0 R08: ffffffffffffffff R09: 000000006770c000
R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007eff577a5fa0 R15: 00007fffbb152a18