INFO: task syz-executor733:4247 blocked for more than 143 seconds.
Not tainted 5.17.0-rc4-syzkaller-00241-g7f25f0412c9e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor733 state:D stack:25200 pid: 4247 ppid: 3655 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4987 [inline]
__schedule+0x926/0x1080 kernel/sched/core.c:6296
schedule+0x12b/0x1f0 kernel/sched/core.c:6369
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
kthread_stop+0xf8/0x200 kernel/kthread.c:709
ext4_stop_mmpd+0x43/0xb0 fs/ext4/mmp.c:255
__ext4_fill_super+0x9b13/0xf6f0 fs/ext4/super.c:5505
ext4_fill_super+0x30d/0x6f0 fs/ext4/super.c:5554
get_tree_bdev+0x406/0x630 fs/super.c:1292
vfs_get_tree+0x86/0x270 fs/super.c:1497
do_new_mount fs/namespace.c:3024 [inline]
path_mount+0x1986/0x2c30 fs/namespace.c:3354
do_mount fs/namespace.c:3367 [inline]
__do_sys_mount fs/namespace.c:3575 [inline]
__se_sys_mount+0x308/0x3c0 fs/namespace.c:3552
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fd7eff30e6a
RSP: 002b:00007fff69aebd18 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff69aebd70 RCX: 00007fd7eff30e6a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff69aebd30
RBP: 00007fff69aebd30 R08: 00007fff69aebd70 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000428
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000007
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cb1d460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/1:2/1132:
#0: ffff888011466538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc9000515fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
1 lock held by udevd/2965:
#0: ffff88801b3ce118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x169/0xd70 block/bdev.c:804
2 locks held by getty/3277:
#0: ffff888024eb5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b732e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2075
1 lock held by syz-executor733/3653:
#0: ffff88801b3ce118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x169/0xd70 block/bdev.c:804
3 locks held by kworker/1:1/3690:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc900029bfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
#2: ffffffff8cb22428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#2: ffffffff8cb22428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x277/0x740 kernel/rcu/tree_exp.h:840
3 locks held by kworker/1:4/3692:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc900027ffd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
#2: ffffffff8cb22428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline]
#2: ffffffff8cb22428 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x356/0x740 kernel/rcu/tree_exp.h:840
2 locks held by kworker/0:1/3694:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc900029dfd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
1 lock held by udevd/3732:
#0: ffff88801b3ce118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xf8/0x7a0 block/bdev.c:902
2 locks held by kworker/1:5/3745:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc90002b1fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
2 locks held by kworker/1:6/4101:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc9000365fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
1 lock held by syz-executor733/4247:
#0: ffff88807cdf40e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x820 fs/super.c:228
2 locks held by kworker/1:7/11117:
#0: ffff888011464d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7db/0x1190 kernel/workqueue.c:2280
#1: ffffc9000e29fd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x81b/0x1190 kernel/workqueue.c:2282
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc4-syzkaller-00241-g7f25f0412c9e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:369
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3924 Comm: kworker/u4:4 Not tainted 5.17.0-rc4-syzkaller-00241-g7f25f0412c9e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_write_cr3 arch/x86/include/asm/special_insns.h:54 [inline]
RIP: 0010:write_cr3 arch/x86/include/asm/special_insns.h:174 [inline]
RIP: 0010:load_new_mm_cr3 arch/x86/mm/tlb.c:292 [inline]
RIP: 0010:switch_mm_irqs_off+0x4f2/0x910 arch/x86/mm/tlb.c:627
Code: 48 8b 3b e9 14 04 00 00 e8 5b f3 ff ff 41 0f b7 cc 81 f9 ff 0f 00 00 0f 83 bb 01 00 00 41 ff c4 41 0f b7 cc 48 09 c8 0f 22 d8 <48> c7 c6 ff ff ff ff 4c 8b 64 24 18 e9 bd 00 00 00 49 8d 5f 50 48
RSP: 0018:ffffc9000310f6a0 EFLAGS: 00000093
RAX: 000000000c88e000 RBX: ffffffff8cbe74f0 RCX: ffff88801d345700
RDX: 0000000000000000 RSI: 000000000c88e000 RDI: 000000001fffffff
RBP: ffffc9000310f7b0 R08: ffffffff813cae9c R09: fffffbfff197cf19
R10: fffffbfff197cf19 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff8cbe74a0
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd7eff8f6e2 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unuse_temporary_mm arch/x86/kernel/alternative.c:946 [inline]
__text_poke+0x767/0x9f0 arch/x86/kernel/alternative.c:1042
text_poke arch/x86/kernel/alternative.c:1083 [inline]
text_poke_bp_batch+0x680/0x920 arch/x86/kernel/alternative.c:1364
text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x12d/0x250 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:735
process_one_work+0x86c/0x1190 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 48 8b 3b mov (%rbx),%rdi
3: e9 14 04 00 00 jmpq 0x41c
8: e8 5b f3 ff ff callq 0xfffff368
d: 41 0f b7 cc movzwl %r12w,%ecx
11: 81 f9 ff 0f 00 00 cmp $0xfff,%ecx
17: 0f 83 bb 01 00 00 jae 0x1d8
1d: 41 ff c4 inc %r12d
20: 41 0f b7 cc movzwl %r12w,%ecx
24: 48 09 c8 or %rcx,%rax
27: 0f 22 d8 mov %rax,%cr3
* 2a: 48 c7 c6 ff ff ff ff mov $0xffffffffffffffff,%rsi <-- trapping instruction
31: 4c 8b 64 24 18 mov 0x18(%rsp),%r12
36: e9 bd 00 00 00 jmpq 0xf8
3b: 49 8d 5f 50 lea 0x50(%r15),%rbx
3f: 48 rex.W