syzbot

INFO: task syz-executor386:5068 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor386 state:D stack:27424 pid:5068  tgid:5068  ppid:5066   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:847 [inline]
 blkdev_fallocate+0x1e9/0x450 block/fops.c:785
 vfs_fallocate+0x46c/0xe50 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xd5/0x140 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe55701cb29
RSP: 002b:00007ffc99618548 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe55701cb29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc99618768 R14: 00007ffc99618570 R15: 00007ffc99618560
 </TASK>
INFO: task syz-executor386:5075 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor386 state:D stack:28000 pid:5075  tgid:5075  ppid:5071   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:847 [inline]
 blkdev_fallocate+0x1e9/0x450 block/fops.c:785
 vfs_fallocate+0x46c/0xe50 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xd5/0x140 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe55701cb29
RSP: 002b:00007ffc99618548 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe55701cb29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc99618768 R14: 00007ffc99618570 R15: 00007ffc99618560
 </TASK>
INFO: task syz-executor386:5076 blocked for more than 144 seconds.
      Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor386 state:D stack:28304 pid:5076  tgid:5076  ppid:5073   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:847 [inline]
 blkdev_fallocate+0x1e9/0x450 block/fops.c:785
 vfs_fallocate+0x46c/0xe50 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xd5/0x140 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe55701cb29
RSP: 002b:00007ffc99618548 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe55701cb29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc99618768 R14: 00007ffc99618570 R15: 00007ffc99618560
 </TASK>
INFO: task syz-executor386:5077 blocked for more than 144 seconds.
      Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor386 state:D stack:28112 pid:5077  tgid:5077  ppid:5074   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 rwsem_down_write_slowpath kernel/locking/rwsem.c:1178 [inline]
 __down_write_common+0x948/0x1400 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:847 [inline]
 blkdev_fallocate+0x1e9/0x450 block/fops.c:785
 vfs_fallocate+0x46c/0xe50 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xd5/0x140 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fe55701cb29
RSP: 002b:00007ffc99618548 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe55701cb29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0
R10: 0008000001002000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc99618768 R14: 00007ffc99618570 R15: 00007ffc99618560
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_preempt/16:
 #0: ffff8880b983c758 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:558
1 lock held by khungtaskd/28:
 #0: ffffffff8cfa82a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8cfa82a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8cfa82a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6613
2 locks held by getty/4818:
 #0: ffff888027f900a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc900020582f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor386/5068:
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:785
1 lock held by syz-executor386/5072:
1 lock held by syz-executor386/5075:
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:785
1 lock held by syz-executor386/5076:
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:785
1 lock held by syz-executor386/5077:
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:785
1 lock held by syz-executor386/5091:
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801b562d40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1e9/0x450 block/fops.c:785

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 1015 Comm: kworker/0:1H Not tainted 6.7.0-rc1-syzkaller-00344-g037266a5f723 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
Workqueue: kblockd blk_mq_run_work_fn
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x70 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 76 c8 e4 f6 48 89 df e8 de 3f e5 f6 f7 c5 00 02 00 00 75 1f 9c 58 f6 c4 02 75 2f <bf> 01 00 00 00 e8 f5 f4 d6 f6 65 8b 05 a6 7f 81 75 85 c0 74 12 5b
RSP: 0018:ffffc900048a7628 EFLAGS: 00000046
RAX: 0000000000000046 RBX: ffffffff929baff0 RCX: ffffffff81677d73
RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffffffff929baff0
RBP: 0000000000000082 R08: 0000000000000000 R09: fffffbfff25375fe
R10: ffffffff929baff3 R11: 0000000000000003 R12: dffffc0000000000
R13: 000000000000c468 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b984431680 CR3: 000000007cdca000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 __debug_check_no_obj_freed lib/debugobjects.c:1042 [inline]
 debug_check_no_obj_freed+0x245/0x4c0 lib/debugobjects.c:1063
 __do_kmem_cache_free mm/slab.c:3556 [inline]
 kmem_cache_free+0x204/0x390 mm/slab.c:3582
 mempool_free+0xe7/0x3b0 mm/mempool.c:507
 bvec_free+0xfb/0x120 block/bio.c:168
 bio_free+0xaa/0x130 block/bio.c:237
 bio_put_percpu_cache block/bio.c:767 [inline]
 bio_put+0x2fb/0x650 block/bio.c:806
 __bio_chain_endio block/bio.c:318 [inline]
 bio_endio+0x33d/0x6a0 block/bio.c:1595
 req_bio_endio block/blk-mq.c:788 [inline]
 blk_update_request+0x67b/0x1700 block/blk-mq.c:933
 blk_mq_end_request+0x57/0x520 block/blk-mq.c:1056
 end_cmd drivers/block/null_blk/main.c:832 [inline]
 end_cmd+0xfd/0x300 drivers/block/null_blk/main.c:826
 blk_mq_complete_request block/blk-mq.c:1233 [inline]
 blk_mq_complete_request+0x8b/0xb0 block/blk-mq.c:1230
 nullb_complete_cmd drivers/block/null_blk/main.c:1430 [inline]
 null_handle_cmd+0x55d/0xa60 drivers/block/null_blk/main.c:1495
 null_queue_rq+0x511/0x7a0 drivers/block/null_blk/main.c:1750
 blk_mq_dispatch_rq_list+0x45b/0x1fd0 block/blk-mq.c:2037
 __blk_mq_sched_dispatch_requests+0x680/0x1620 block/blk-mq-sched.c:315
 blk_mq_sched_dispatch_requests+0x104/0x180 block/blk-mq-sched.c:333
 blk_mq_run_work_fn+0x1ef/0x380 block/blk-mq.c:2422
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2630
 process_scheduled_works kernel/workqueue.c:2703 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2784
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.353 msecs