INFO: task syz-executor.1:27705 blocked for more than 143 seconds.
Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27448 pid:27705 ppid:5098 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5293 [inline]
__schedule+0xb8a/0x5450 kernel/sched/core.c:6606
schedule+0xde/0x1b0 kernel/sched/core.c:6682
request_wait_answer+0x46d/0x850 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x711/0xe80 fs/fuse/dev.c:511
fuse_do_getattr+0x243/0xb50 fs/fuse/dir.c:1119
fuse_update_get_attr fs/fuse/dir.c:1157 [inline]
fuse_getattr+0x42e/0x500 fs/fuse/dir.c:1926
vfs_getattr_nosec+0x2a7/0x370 fs/stat.c:127
vfs_getattr fs/stat.c:164 [inline]
vfs_statx+0x197/0x430 fs/stat.c:236
vfs_fstatat+0x90/0xb0 fs/stat.c:270
vfs_lstat include/linux/fs.h:3298 [inline]
__do_sys_newlstat+0x8e/0x110 fs/stat.c:426
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fba4f68c0c9
RSP: 002b:00007fba503c0168 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 00007fba4f7abf80 RCX: 00007fba4f68c0c9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000740
RBP: 00007fba4f6e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc0d89de7f R14: 00007fba503c0300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/11:
#0: ffffffff8c78dff0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/12:
#0: ffffffff8c78dcf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/27:
#0: ffffffff8c78eb40 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x57/0x264 kernel/locking/lockdep.c:6494
2 locks held by getty/4738:
#0: ffff8880244fc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc900020282f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.3/5089:
#0: ffffffff8c7997f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8c7997f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x5df/0x780 kernel/rcu/tree_exp.h:946
2 locks held by kworker/0:4/5142:
#0: ffff888012479538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012479538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012479538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012479538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1710 kernel/workqueue.c:2260
#1: ffffc90004ec7da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1710 kernel/workqueue.c:2264
3 locks held by kworker/u4:4/25379:
5 locks held by syz-executor.2/29023:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x333/0x3c0 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+0xc75/0xfc0 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4421 Comm: udevd Not tainted 6.2.0-rc5-syzkaller-00108-g83abd4d4c4be #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:__debug_check_no_obj_freed lib/debugobjects.c:985 [inline]
RIP: 0010:debug_check_no_obj_freed+0x1dc/0x420 lib/debugobjects.c:1027
Code: 02 00 00 48 89 45 08 4d 89 30 4c 89 c7 4d 89 68 08 e8 68 d0 ff ff 48 85 ed 74 2c 49 89 e8 4c 89 c0 48 c1 e8 03 42 80 3c 38 00 <0f> 84 2e ff ff ff 4c 89 c7 4c 89 44 24 38 e8 91 87 be fd 4c 8b 44
RSP: 0018:ffffc9000345fa60 EFLAGS: 00000046
RAX: 1ffff11003de70f5 RBX: ffff8880751b1080 RCX: ffffffff81638814
RDX: 1ffffffff23c19bb RSI: 0000000000000004 RDI: ffff88801ed7e6e0
RBP: ffff88801ef387a8 R08: ffff88801ef387a8 R09: ffff88802084d6f8
R10: fffff5200068bf3a R11: 0000000000000000 R12: 0000000000000006
R13: dead000000000122 R14: dead000000000100 R15: dffffc0000000000
FS: 00007fe242940840(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556749888 CR3: 000000007c149000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__do_kmem_cache_free mm/slab.c:3581 [inline]
__kmem_cache_free+0x194/0x3b0 mm/slab.c:3589
kobject_uevent_env+0x29b/0x1620 lib/kobject_uevent.c:625
kobject_synth_uevent+0x705/0x850 lib/kobject_uevent.c:208
uevent_store+0x24/0x50 drivers/base/core.c:2510
dev_attr_store+0x54/0x80 drivers/base/core.c:2212
sysfs_kf_write+0x114/0x170 fs/sysfs/file.c:136
kernfs_fop_write_iter+0x3f1/0x600 fs/kernfs/file.c:334
call_write_iter include/linux/fs.h:2189 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x9ed/0xdd0 fs/read_write.c:584
ksys_write+0x12b/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe2425259a3
Code: 8b 15 d9 f4 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18
RSP: 002b:00007fff7bd06548 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 00007fe2425259a3
RDX: 0000000000000007 RSI: 000055f40a1456c0 RDI: 000000000000000c
RBP: 000055f40a1456c0 R08: 000000000000000a R09: 00007fe2425f5a60
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000007
R13: 000055f40a1471d0 R14: 0000000000000007 R15: 00007fe2425f1780