INFO: task syz-executor.3:16201 blocked for more than 143 seconds.
Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24408 pid:16201 ppid: 3635 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x91f/0xdf0 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6629
__mutex_lock_common+0xe4f/0x26e0 kernel/locking/mutex.c:679
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
__fdget_pos+0x242/0x2e0 fs/file.c:1036
fdget_pos include/linux/file.h:73 [inline]
ksys_write+0x7a/0x2a0 fs/read_write.c:622
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f198d68a669
RSP: 002b:00007f198e829168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f198d7abf80 RCX: 00007f198d68a669
RDX: 00000000000000a0 RSI: 0000000020002200 RDI: 0000000000000006
RBP: 00007f198d6e5560 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff85f7361f R14: 00007f198e829300 R15: 0000000000022000
INFO: task syz-executor.3:16204 blocked for more than 143 seconds.
Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:24992 pid:16204 ppid: 3635 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5182 [inline]
__schedule+0x91f/0xdf0 kernel/sched/core.c:6494
schedule+0xcb/0x190 kernel/sched/core.c:6570
rwsem_down_read_slowpath+0x5f9/0x930 kernel/locking/rwsem.c:1087
__down_read_common+0x54/0x2a0 kernel/locking/rwsem.c:1252
iterate_supers+0xb0/0x1f0 fs/super.c:721
drop_caches_sysctl_handler+0x81/0x160 fs/drop_caches.c:62
proc_sys_call_handler+0x576/0x890 fs/proc/proc_sysctl.c:611
call_write_iter include/linux/fs.h:2187 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7dc/0xc50 fs/read_write.c:578
ksys_write+0x177/0x2a0 fs/read_write.c:631
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f198d68a669
RSP: 002b:00007f198e808168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f198d7ac050 RCX: 00007f198d68a669
RDX: 0000000000000001 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00007f198d6e5560 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff85f7361f R14: 00007f198e808300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb233f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb23bf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8cb23220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3289:
#0: ffff888026e09098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.5/4828:
1 lock held by syz-executor.3/16201:
#0: ffff888076c82d68 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
3 locks held by syz-executor.3/16204:
#0: ffff888076c82d68 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
#1: ffff88807edd8460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x287/0xc50 fs/read_write.c:574
#2: ffff88807e7e00e0 (&type->s_umount_key#77){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:721
3 locks held by syz-executor.0/16552:
#0: ffff888022c7a0e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
#1: ffff88807edd8460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x287/0xc50 fs/read_write.c:574
#2: ffff88807e7e00e0 (&type->s_umount_key#77){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:721
1 lock held by syz-executor.0/16570:
#0: ffff888022c7a0e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
3 locks held by syz-executor.3/16610:
#0: ffff888026bfa5e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
#1: ffff88807edd8460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x287/0xc50 fs/read_write.c:574
#2: ffff88807e7e00e0 (&type->s_umount_key#77){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:721
1 lock held by syz-executor.3/16611:
#0: ffff888026bfa5e8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
3 locks held by syz-executor.3/17352:
#0: ffff888025e16368 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
#1: ffff88807edd8460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x287/0xc50 fs/read_write.c:574
#2: ffff88807e7e00e0 (&type->s_umount_key#77){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:721
1 lock held by syz-executor.3/17353:
#0: ffff888025e16368 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
3 locks held by syz-executor.0/17369:
#0: ffff888048c3b768 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
#1: ffff88807edd8460 (sb_writers#3){.+.+}-{0:0}, at: vfs_write+0x287/0xc50 fs/read_write.c:574
#2: ffff88807e7e00e0 (&type->s_umount_key#77){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:721
1 lock held by syz-executor.0/17370:
#0: ffff888048c3b768 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x242/0x2e0 fs/file.c:1036
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1b1/0x28e lib/dump_stack.c:106
nmi_cpu_backtrace+0x425/0x450 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x169/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xcd5/0xd20 kernel/hung_task.c:369
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 55 Comm: kworker/u4:4 Not tainted 6.0.0-rc6-syzkaller-00045-gdc164f4fb00a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__text_poke+0x113/0x900 arch/x86/kernel/alternative.c:1103
Code: 84 9c 00 00 00 48 bb 00 00 00 00 00 ea ff ff 4c 89 ff e8 a0 b3 0b 00 49 89 c6 49 c1 ee 06 49 83 e6 c0 48 89 d8 48 89 5c 24 08 <49> 01 de 4c 89 f3 48 c1 eb 03 42 80 3c 2b 00 74 08 4c 89 f7 e8 e4
RSP: 0018:ffffc900015677c0 EFLAGS: 00000202
RAX: ffffea0000000000 RBX: ffffea0000000000 RCX: ffff8880186b9d80
RDX: 0000000000000000 RSI: 0000000001d9d056 RDI: 000000001fffffff
RBP: ffffc90001567970 R08: ffffffff813cb2ec R09: fffff520002acf4a
R10: fffff520002acf4b R11: 1ffff920002acf4a R12: 1ffff920002acf04
R13: dffffc0000000000 R14: 0000000000076740 R15: ffffffff81d9d056
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00f715000 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
text_poke arch/x86/kernel/alternative.c:1208 [inline]
text_poke_bp_batch+0x49e/0x970 arch/x86/kernel/alternative.c:1503
text_poke_flush arch/x86/kernel/alternative.c:1660 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1667
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x129/0x250 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate+0xbf/0x450 mm/kfence/core.c:811
process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30