syzbot

INFO: task syz-executor410:5073 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc6-syzkaller-00120-g87adedeba51a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor410 state:D stack:26800 pid:5073  tgid:5073  ppid:5070   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 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
 filemap_invalidate_lock include/linux/fs.h:849 [inline]
 blk_ioctl_zeroout block/ioctl.c:185 [inline]
 blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
 blkdev_ioctl+0x532/0x740 block/ioctl.c:628
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfe/0x170 fs/ioctl.c:857
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f854669d819
RSP: 002b:00007ffdd80bce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f854669d819
RDX: 0000000020000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00007f85466df09e R09: 00007f85466df09e
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdd80bced0
R13: 00007ffdd80bcef0 R14: 00007ffdd80bcfd0 R15: 00007f85466df0b7
 </TASK>
INFO: task syz-executor410:5077 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc6-syzkaller-00120-g87adedeba51a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor410 state:D stack:25936 pid:5077  tgid:5077  ppid:5075   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 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
 filemap_invalidate_lock include/linux/fs.h:849 [inline]
 blk_ioctl_zeroout block/ioctl.c:185 [inline]
 blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
 blkdev_ioctl+0x532/0x740 block/ioctl.c:628
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfe/0x170 fs/ioctl.c:857
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f854669d819
RSP: 002b:00007ffdd80bce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f854669d819
RDX: 0000000020000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00007f85466df09e R09: 00007f85466df09e
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdd80bced0
R13: 00007ffdd80bcef0 R14: 00007ffdd80bcfd0 R15: 00007f85466df0b7
 </TASK>
INFO: task syz-executor410:5078 blocked for more than 144 seconds.
      Not tainted 6.8.0-rc6-syzkaller-00120-g87adedeba51a #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor410 state:D stack:26512 pid:5078  tgid:5078  ppid:5076   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17d1/0x49f0 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
 filemap_invalidate_lock include/linux/fs.h:849 [inline]
 blk_ioctl_zeroout block/ioctl.c:185 [inline]
 blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
 blkdev_ioctl+0x532/0x740 block/ioctl.c:628
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfe/0x170 fs/ioctl.c:857
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f854669d819
RSP: 002b:00007ffdd80bce18 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f854669d819
RDX: 0000000020000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00000000000f4240 R08: 00007f85466df09e R09: 00007f85466df09e
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdd80bced0
R13: 00007ffdd80bcef0 R14: 00007ffdd80bcfd0 R15: 00007f85466df0b7
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e130be0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4818:
 #0: ffff88802e7290a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor410/5069:
1 lock held by syz-executor410/5073:
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:849 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
1 lock held by syz-executor410/5077:
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:849 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
1 lock held by syz-executor410/5078:
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:849 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
1 lock held by syz-executor410/5096:
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:849 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514
1 lock held by syz-executor410/5097:
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:849 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0a42c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:514

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc6-syzkaller-00120-g87adedeba51a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <TASK>
 __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+0x2f1/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 42 Comm: kworker/u4:2 Not tainted 6.8.0-rc6-syzkaller-00120-g87adedeba51a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__lock_acquire+0x13b5/0x1fd0 kernel/locking/lockdep.c:5151
Code: 84 00 48 ba 00 00 00 00 00 fc ff df 48 89 2b 48 8b 44 24 40 0f b6 04 10 84 c0 0f 85 84 09 00 00 48 8b 0c 24 8b 01 ff c0 89 01 <83> f8 30 0f 83 5f 02 00 00 3b 05 7c a8 57 11 0f 87 b9 02 00 00 b9
RSP: 0018:ffffc90000b2f370 EFLAGS: 00000006
RAX: 0000000000000006 RBX: ffff88801aef63f0 RCX: ffff88801aef63f8
RDX: dffffc0000000000 RSI: ffff88801aef64c8 RDI: ffff88801aef5940
RBP: 7f2a5853d8cc6066 R08: ffffffff92c8d427 R09: 1ffffffff2591a84
R10: dffffc0000000000 R11: fffffbfff2591a85 R12: ffff88801aef5940
R13: ffff88801aef5940 R14: 0000000000000000 R15: ffff88801aef5940
FS:  0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c8153d7680 CR3: 000000000df32000 CR4: 0000000000350ef0
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
 rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 rcu_read_lock include/linux/rcupdate.h:750 [inline]
 __pte_offset_map+0x9e/0x380 mm/pgtable-generic.c:285
 __pte_offset_map_lock+0xc7/0x300 mm/pgtable-generic.c:369
 get_locked_pte include/linux/mm.h:2683 [inline]
 __text_poke+0x2c5/0xd30 arch/x86/kernel/alternative.c:1901
 text_poke arch/x86/kernel/alternative.c:1986 [inline]
 text_poke_bp_batch+0x8cd/0xb30 arch/x86/kernel/alternative.c:2375
 text_poke_flush arch/x86/kernel/alternative.c:2488 [inline]
 text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2495
 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:205
 static_key_enable+0x1a/0x20 kernel/jump_label.c:218
 toggle_allocation_gate+0xb5/0x250 mm/kfence/core.c:826
 process_one_work kernel/workqueue.c:2633 [inline]
 process_scheduled_works+0x915/0x1420 kernel/workqueue.c:2706
 worker_thread+0xa5f/0x1000 kernel/workqueue.c:2787
 kthread+0x2f1/0x390 kernel/kthread.c:388
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:243
 </TASK>