INFO: task syz-executor.3:8178 blocked for more than 143 seconds.
      Not tainted 6.8.0-rc4-next-20240214-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:28272 pid:8178  tgid:8172  ppid:2206   flags:0x00000006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5400 [inline]
 __schedule+0x17df/0x4a40 kernel/sched/core.c:6727
 __schedule_loop kernel/sched/core.c:6804 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6819
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6876
 rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
 filemap_invalidate_lock include/linux/fs.h:847 [inline]
 blk_ioctl_zeroout block/ioctl.c:185 [inline]
 blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:513
 blkdev_ioctl+0x532/0x740 block/ioctl.c:627
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:890
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fdb17c7dda9
RSP: 002b:00007fdb1897b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fdb17dac120 RCX: 00007fdb17c7dda9
RDX: 0000000020000240 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007fdb17cca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fdb17dac120 R15: 00007ffcaa6a8048
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/u8:0/10:
1 lock held by khungtaskd/29:
 #0: ffffffff8e1315a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8e1315a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
 #0: ffffffff8e1315a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by udevd/4520:
2 locks held by getty/4818:
 #0: ffff88802310e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.3/8178:
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:513
1 lock held by syz-executor.1/8176:
1 lock held by syz-executor.3/8607:
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:513
1 lock held by syz-executor.1/8682:
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xfb/0x7a0 mm/readahead.c:225
1 lock held by syz-executor.3/8767:
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:513
1 lock held by syz-executor.3/9210:
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:847 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:185 [inline]
 #0: ffff88801d0ac2c0 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1718/0x2880 block/ioctl.c:513

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc4-next-20240214-syzkaller #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+0x241/0x360 lib/dump_stack.c:114
 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:223 [inline]
 watchdog+0xfb0/0xff0 kernel/hung_task.c:380
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10 Comm: kworker/u8:0 Not tainted 6.8.0-rc4-next-20240214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:separate_irq_context kernel/locking/lockdep.c:4628 [inline]
RIP: 0010:__lock_acquire+0xd66/0x1fd0 kernel/locking/lockdep.c:5121
Code: 48 c1 e8 03 0f b6 04 38 84 c0 0f 85 22 0d 00 00 8b 1b 48 8b 44 24 20 0f b6 04 38 84 c0 0f 85 36 0d 00 00 48 8b 44 24 10 33 18 <f7> c3 00 60 00 00 74 0d 41 be 01 00 00 00 49 c7 c4 ff ff ff ff 4d
RSP: 0018:ffffc900000f78f0 EFLAGS: 00000002
RAX: ffff888016eb2948 RBX: 00000000000606e5 RCX: ffff888016eb28d8
RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000
RBP: ffff888016eb2928 R08: ffffffff92cc34a7 R09: 1ffffffff2598694
R10: dffffc0000000000 R11: fffffbfff2598695 R12: a8ac9b4055a99ff2
R13: ffff888016eb1e00 R14: 0000000000000000 R15: ffff888016eb2948
FS:  0000000000000000(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005596ad9677a8 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lock_acquire+0x1e4/0x530 kernel/locking/lockdep.c:5754
 rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 rcu_read_lock include/linux/rcupdate.h:750 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline]
 batadv_nc_worker+0xec/0x610 net/batman-adv/network-coding.c:719
 process_one_work kernel/workqueue.c:3146 [inline]
 process_scheduled_works+0x9d7/0x1730 kernel/workqueue.c:3226
 worker_thread+0x86d/0xd70 kernel/workqueue.c:3307
 kthread+0x2f0/0x390 kernel/kthread.c:388
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
 </TASK>