syzbot

INFO: task syz-executor198:5080 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor198 state:D stack:25760 pid:5080  ppid:5075   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0x179d/0x4690 kernel/sched/core.c:6622
 schedule+0xc3/0x180 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:803 [inline]
 blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
 vfs_fallocate+0x54b/0x6b0 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+0xbd/0x100 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f85b8d7be29
RSP: 002b:00007ffd3d23d6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f85b8d7be29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0008000001002000 R11: 0000000000000246 R12: 00007f85b8d3f600
R13: 0000000000000000 R14: 00007ffd3d23d6e0 R15: 00007ffd3d23d6d0
 </TASK>
INFO: task syz-executor198:5082 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor198 state:D stack:26200 pid:5082  ppid:5076   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0x179d/0x4690 kernel/sched/core.c:6622
 schedule+0xc3/0x180 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:803 [inline]
 blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
 vfs_fallocate+0x54b/0x6b0 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+0xbd/0x100 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f85b8d7be29
RSP: 002b:00007ffd3d23d6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f85b8d7be29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0008000001002000 R11: 0000000000000246 R12: 00007f85b8d3f600
R13: 0000000000000000 R14: 00007ffd3d23d6e0 R15: 00007ffd3d23d6d0
 </TASK>
INFO: task syz-executor198:5083 blocked for more than 143 seconds.
      Not tainted 6.3.0-rc2-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor198 state:D stack:27304 pid:5083  ppid:5079   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5304 [inline]
 __schedule+0x179d/0x4690 kernel/sched/core.c:6622
 schedule+0xc3/0x180 kernel/sched/core.c:6698
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6757
 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:803 [inline]
 blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
 vfs_fallocate+0x54b/0x6b0 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+0xbd/0x100 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f85b8d7be29
RSP: 002b:00007ffd3d23d6b8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00000000000f4240 RCX: 00007f85b8d7be29
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: 0008000001002000 R11: 0000000000000246 R12: 00007f85b8d3f600
R13: 0000000000000000 R14: 00007ffd3d23d6e0 R15: 00007ffd3d23d6d0
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8cf25f30 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8cf26730 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffffffff8cf25d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by klogd/4423:
2 locks held by getty/4748:
 #0: ffff88802c804098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor198/5080:
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline]
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
1 lock held by syz-executor198/5081:
1 lock held by syz-executor198/5082:
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline]
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
1 lock held by syz-executor198/5083:
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline]
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
1 lock held by syz-executor198/5101:
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline]
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21e/0x3b0 block/fops.c:649
1 lock held by syz-executor198/5108:
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:803 [inline]
 #0: ffff88801d8d3fc0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x21e/0x3b0 block/fops.c:649

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf9d/0xfe0 kernel/hung_task.c:379
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11 Comm: kworker/u4:1 Not tainted 6.3.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:match_held_lock+0x17/0xb0 kernel/locking/lockdep.c:5118
Code: 66 a5 f6 0f 0b eb b6 e8 b7 f9 ff ff 0f 1f 80 00 00 00 00 55 53 bd 01 00 00 00 48 39 77 10 74 67 48 89 fb 81 7f 20 00 00 10 00 <72> 59 48 8b 46 08 48 85 c0 75 11 31 ed 48 89 f7 31 f6 e8 92 fe ff
RSP: 0018:ffffc90000107800 EFLAGS: 00000087
RAX: 0000000000000005 RBX: ffff8880167dc558 RCX: 0000000080000002
RDX: 0000000000000000 RSI: ffffffff8cf25ce0 RDI: ffff8880167dc558
RBP: 0000000000000001 R08: dffffc0000000000 R09: fffffbfff1ca8066
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000246
R13: ffff8880167dba80 R14: 00000000ffffffff R15: ffffffff8cf25ce0
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001008 CR3: 000000000cd30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __lock_is_held kernel/locking/lockdep.c:5410 [inline]
 lock_is_held_type+0xa8/0x190 kernel/locking/lockdep.c:5712
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x8d/0x130 kernel/rcu/update.c:125
 trace_contention_begin+0x5a/0x160 include/trace/events/lock.h:95
 __mutex_lock_common+0x1e9/0x2530 kernel/locking/mutex.c:605
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
 arch_jump_label_transform_queue+0x44/0xd0 arch/x86/kernel/jump_label.c:136
 __jump_label_update+0x177/0x3a0 kernel/jump_label.c:475
 static_key_disable_cpuslocked+0xce/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:804
 process_one_work+0x90c/0x1280 kernel/workqueue.c:2390
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.050 msecs