INFO: task syz-executor.1:10914 blocked for more than 143 seconds.
Not tainted 6.8.0-rc5-syzkaller-00029-g39133352cbed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26264 pid:10914 tgid:10913 ppid:4606 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1198/0x1b90 fs/fuse/dev.c:513
fuse_dentry_revalidate+0x524/0xbc0 fs/fuse/dir.c:233
d_revalidate fs/namei.c:862 [inline]
__lookup_slow+0x1bb/0x3f0 fs/namei.c:1682
lookup_slow+0x53/0x70 fs/namei.c:1710
walk_component+0x2e1/0x410 fs/namei.c:2001
lookup_last fs/namei.c:2458 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2482
filename_lookup+0x255/0x610 fs/namei.c:2511
vfs_statx+0x105/0x4e0 fs/stat.c:244
do_statx fs/stat.c:681 [inline]
__do_sys_statx fs/stat.c:708 [inline]
__se_sys_statx fs/stat.c:699 [inline]
__x64_sys_statx+0x1a4/0x240 fs/stat.c:699
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f590407dda9
RSP: 002b:00007f5904d390c8 EFLAGS: 00000246 ORIG_RAX: 000000000000014c
RAX: ffffffffffffffda RBX: 00007f59041abf80 RCX: 00007f590407dda9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f59040ca47a R08: 00000000200065c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f59041abf80 R15: 00007fffcebc6898
INFO: task syz-executor.1:10919 blocked for more than 143 seconds.
Not tainted 6.8.0-rc5-syzkaller-00029-g39133352cbed #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25776 pid:10919 tgid:10913 ppid:4606 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1ae/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
filename_create+0x260/0x540 fs/namei.c:3891
do_mkdirat+0xbd/0x3a0 fs/namei.c:4137
__do_sys_mkdirat fs/namei.c:4160 [inline]
__se_sys_mkdirat fs/namei.c:4158 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4158
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f590407c8a7
RSP: 002b:00007f59033feef8 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f59033fef80 RCX: 00007f590407c8a7
RDX: 00000000000001ff RSI: 0000000020000140 RDI: 00000000ffffff9c
RBP: 0000000020000200 R08: 0000000000000000 R09: 00000000000001c5
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000140
R13: 00007f59033fef40 R14: 00000000000001cb R15: 0000000020000500
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:7/1095:
2 locks held by udevd/4509:
#0: ffff888054e58420 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff8880b9528988 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by getty/4814:
#0: ffff88802b2a10a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/1:0/12977:
#0: ffff888014c8e538 (
(wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
(wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90004eafd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90004eafd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by kworker/u4:11/22175:
1 lock held by syz-executor.2/32658:
#0: ffffffff8e1365f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8e1365f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:995
1 lock held by syz-executor.1/10914:
#0: ffff888034539590 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888034539590 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.1/10919:
#0: ffff888031c34420 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888034539590 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888034539590 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891
1 lock held by syz-executor.0/11016:
#0: ffff88803453a310 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88803453a310 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.0/11019:
#0: ffff88802cfda420 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88803453a310 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88803453a310 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891
1 lock held by syz-executor.1/11132:
#0: ffff888034711590 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888034711590 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.1/11139:
#0: ffff888033646420 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888034711590 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888034711590 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891
1 lock held by syz-executor.0/11290:
#0: ffff888034710150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888034710150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.0/11294:
#0: ffff88802e3ec420 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888034710150 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888034710150 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891
1 lock held by syz-executor.1/11398:
#0: ffff888034538150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff888034538150 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.1/11410:
#0: ffff888033a76420 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff888034538150 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff888034538150 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891
1 lock held by syz-executor.0/11513:
#0: ffff88803453c4d0 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88803453c4d0 (&type->i_mutex_dir_key#22){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.0/11522:
#0: ffff888050b30420 (sb_writers#33){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88803453c4d0 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88803453c4d0 (&type->i_mutex_dir_key#22/1){+.+.}-{3:3}, at: filename_create+0x260/0x540 fs/namei.c:3891
1 lock held by syz-executor.3/11535:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00029-g39133352cbed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 32658 Comm: syz-executor.2 Not tainted 6.8.0-rc5-syzkaller-00029-g39133352cbed #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:kasan_check_range+0x7/0x290 mm/kasan/generic.c:188
Code: 6f 0c e6 ff 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 41 57 <41> 56 41 54 53 b0 01 48 85 f6 0f 84 a0 01 00 00 4c 8d 04 37 49 39
RSP: 0018:ffffc900032af1b8 EFLAGS: 00000046
RAX: 0000000000000006 RBX: 00000000000001ae RCX: ffffffff8171244d
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff92c55450
RBP: 0000000000000000 R08: ffffffff92c554c7 R09: 1ffffffff258aa98
R10: dffffc0000000000 R11: fffffbfff258aa99 R12: 0000000000000001
R13: ffff888026ca6448 R14: 0000000000000001 R15: ffff888026ca6448
FS: 00005555574d1480(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe665fac018 CR3: 0000000023322000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class kernel/locking/lockdep.c:228 [inline]
check_wait_context kernel/locking/lockdep.c:4798 [inline]
__lock_acquire+0x86d/0x1fd0 kernel/locking/lockdep.c:5087
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
__debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019
free_pages_prepare mm/page_alloc.c:1146 [inline]
free_unref_page_prepare+0x319/0xa80 mm/page_alloc.c:2346
free_unref_page+0x37/0x3f0 mm/page_alloc.c:2486
__slab_free+0x349/0x410 mm/slub.c:4211
qlink_free mm/kasan/quarantine.c:160 [inline]
qlist_free_all+0x6d/0xd0 mm/kasan/quarantine.c:176
kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:283
__kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:324
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc+0x16f/0x340 mm/slub.c:3867
vm_area_dup+0x27/0x290 kernel/fork.c:480
dup_mmap kernel/fork.c:695 [inline]
dup_mm kernel/fork.c:1685 [inline]
copy_mm+0xd94/0x21b0 kernel/fork.c:1734
copy_process+0x1d73/0x3fc0 kernel/fork.c:2497
kernel_clone+0x222/0x840 kernel/fork.c:2902
__do_sys_clone kernel/fork.c:3045 [inline]
__se_sys_clone kernel/fork.c:3029 [inline]
__x64_sys_clone+0x258/0x2a0 kernel/fork.c:3029
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f316d47add3
Code: 1f 84 00 00 00 00 00 64 48 8b 04 25 10 00 00 00 45 31 c0 31 d2 31 f6 bf 11 00 20 01 4c 8d 90 d0 02 00 00 b8 38 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 89 c2 85 c0 75 2c 64 48 8b 04 25 10 00 00
RSP: 002b:00007fff9abb55d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f316d47add3
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000
R10: 00005555574d1750 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000