INFO: task syz-executor.4:10361 blocked for more than 143 seconds.
Not tainted 6.3.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:27776 pid:10361 ppid:5124 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5304 [inline]
__schedule+0x179d/0x4690 kernel/sched/core.c:6622
schedule+0xc3/0x180 kernel/sched/core.c:6698
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
rwsem_down_read_slowpath+0x5f4/0x950 kernel/locking/rwsem.c:1086
__down_read_common+0x61/0x2c0 kernel/locking/rwsem.c:1250
inode_lock_shared include/linux/fs.h:768 [inline]
open_last_lookups fs/namei.c:3483 [inline]
path_openat+0x7ab/0x3170 fs/namei.c:3712
do_filp_open+0x234/0x490 fs/namei.c:3742
do_sys_openat2+0x13f/0x500 fs/open.c:1348
do_sys_open fs/open.c:1364 [inline]
__do_sys_openat fs/open.c:1380 [inline]
__se_sys_openat fs/open.c:1375 [inline]
__x64_sys_openat+0x247/0x290 fs/open.c:1375
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fbbc008c0f9
RSP: 002b:00007fbbc0e6e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fbbc01ac050 RCX: 00007fbbc008c0f9
RDX: 0000000000010200 RSI: 0000000020000280 RDI: ffffffffffffff9c
RBP: 00007fbbc00e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff0cba3aaf R14: 00007fbbc0e6e300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf25f30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf26730 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf25d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:3/46:
2 locks held by getty/4750:
#0: ffff88802c5f4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
2 locks held by kworker/1:12/5476:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x788/0x1280 kernel/workqueue.c:2363
#1: ffffc90005f1fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d2/0x1280 kernel/workqueue.c:2365
6 locks held by syz-executor.4/10357:
2 locks held by syz-executor.4/10361:
#0: ffff88803224c460 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff8880736cbc50 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#1: ffff8880736cbc50 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: open_last_lookups fs/namei.c:3483 [inline]
#1: ffff8880736cbc50 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: path_openat+0x7ab/0x3170 fs/namei.c:3712
6 locks held by syz-executor.0/10569:
2 locks held by syz-executor.0/10587:
#0: ffff8880792a8460 (sb_writers#23){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:394
#1: ffff8880736ca2b0 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#1: ffff8880736ca2b0 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: open_last_lookups fs/namei.c:3483 [inline]
#1: ffff8880736ca2b0 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: path_openat+0x7ab/0x3170 fs/namei.c:3712
3 locks held by syz-executor.4/10967:
#0: ffff88802987c460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write_file+0x5e/0x1f0 fs/namespace.c:438
#1: ffff888076d02218 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#1: ffff888076d02218 (&sb->s_type->i_mutex_key#7){++++}-{3:3}, at: vfs_fileattr_set+0x139/0xd40 fs/ioctl.c:681
#2: ffff88802987eb98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ind_migrate+0x258/0x760 fs/ext4/migrate.c:624
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf9d/0xfe0 kernel/hung_task.c:379
kthread+0x270/0x300 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: 11007 Comm: syz-executor.1 Not tainted 6.3.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:mark_lock+0xa2/0x340 kernel/locking/lockdep.c:4613
Code: 00 8b 1b 81 e3 ff 1f 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 c0 c1 2d 90 be 08 00 00 00 e8 f6 10 76 00 48 0f a3 1d 4e 96 c2 0e <73> 11 48 8d 04 5b 48 c1 e0 06 48 8d 98 c0 20 fd 8f eb 23 48 c7 c0
RSP: 0000:ffffc90004897798 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 000000000000019d RCX: ffffffff816b2b6a
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff902dc1f0
RBP: 0000000000000007 R08: dffffc0000000000 R09: fffffbfff205b83f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8880322dc4d8
R13: dffffc0000000000 R14: 0000000000000080 R15: ffff8880322dc4b8
FS: 00007f5ea333b700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e9ac00000 CR3: 000000001cdb4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks kernel/locking/lockdep.c:4237 [inline]
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4263 [inline]
lockdep_hardirqs_on_prepare+0x3a4/0x7a0 kernel/locking/lockdep.c:4322
trace_hardirqs_on+0x28/0x40 kernel/trace/trace_preemptirq.c:61
put_cpu_partial+0xe8/0x180 mm/slub.c:2710
qlist_free_all+0x22/0x60 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305
kasan_slab_alloc include/linux/kasan.h:186 [inline]
slab_post_alloc_hook+0x68/0x3a0 mm/slab.h:769
slab_alloc_node mm/slub.c:3452 [inline]
slab_alloc mm/slub.c:3460 [inline]
__kmem_cache_alloc_lru mm/slub.c:3467 [inline]
kmem_cache_alloc+0x12c/0x280 mm/slub.c:3476
ptlock_alloc+0x20/0x70 mm/memory.c:5821
ptlock_init include/linux/mm.h:2620 [inline]
pgtable_pte_page_ctor include/linux/mm.h:2647 [inline]
__pte_alloc_one include/asm-generic/pgalloc.h:66 [inline]
pte_alloc_one+0xd5/0x360 arch/x86/mm/pgtable.c:33
__pte_alloc+0x79/0x220 mm/memory.c:421
do_anonymous_page mm/memory.c:4020 [inline]
handle_pte_fault mm/memory.c:4907 [inline]
__handle_mm_fault mm/memory.c:5051 [inline]
handle_mm_fault+0x47c9/0x51c0 mm/memory.c:5197
do_user_addr_fault arch/x86/mm/fault.c:1407 [inline]
handle_page_fault arch/x86/mm/fault.c:1498 [inline]
exc_page_fault+0x679/0x890 arch/x86/mm/fault.c:1554
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7f5ea26291c7
Code: 78 48 63 d5 48 01 c2 49 3b 55 08 77 56 8d 55 ff 85 ed 74 35 0f 1f 80 00 00 00 00 48 39 c1 77 1c 49 8b 75 00 49 89 c1 49 29 c9 <46> 0f b6 0c 0e 45 84 c9 74 08 44 88 0c 06 49 8b 45 10 48 83 c0 01
RSP: 002b:00007f5ea333a600 EFLAGS: 00010206
RAX: 0000000001e01001 RBX: 00007f5ea333a660 RCX: 0000000000000001
RDX: 00000000000000e9 RSI: 00007f5e98dff000 RDI: 00007f5ea333a700
RBP: 0000000000000102 R08: 0000000000000000 R09: 0000000001e01000
R10: 0000000000000000 R11: 00007f5ea333a670 R12: 00007f5ea333a670
R13: 00007f5ea333a700 R14: 0000000000000001 R15: 0000000000000000