INFO: task syz.3.19:5273 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.19        state:D stack:27872 pid: 5273 ppid:  4958 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
 filemap_invalidate_lock include/linux/fs.h:832 [inline]
 blk_ioctl_zeroout block/ioctl.c:183 [inline]
 blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
 blkdev_ioctl+0x295/0x690 block/ioctl.c:598
 block_ioctl+0xac/0xf0 block/fops.c:496
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc54c7e5d29
RSP: 002b:00007fc54ba5e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc54c9d5fa0 RCX: 00007fc54c7e5d29
RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007fc54c861b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc54c9d5fa0 R15: 00007fff46de5aa8
 </TASK>
INFO: task syz.4.20:5281 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.20        state:D stack:27200 pid: 5281 ppid:  4967 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5030 [inline]
 __schedule+0x11b8/0x43b0 kernel/sched/core.c:6376
 schedule+0x11b/0x1e0 kernel/sched/core.c:6459
 rwsem_down_write_slowpath+0xc46/0x11f0 kernel/locking/rwsem.c:1165
 filemap_invalidate_lock include/linux/fs.h:832 [inline]
 blk_ioctl_zeroout block/ioctl.c:183 [inline]
 blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
 blkdev_ioctl+0x295/0x690 block/ioctl.c:598
 block_ioctl+0xac/0xf0 block/fops.c:496
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fc776e76d29
RSP: 002b:00007fc7760ef038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc777066fa0 RCX: 00007fc776e76d29
RDX: 0000000020000080 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007fc776ef2b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc777066fa0 R15: 00007ffe84065768
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffffffff8c11c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3948:
 #0: ffff88814ce4f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
 #1: ffffc900026562e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ba/0x1a30 drivers/tty/n_tty.c:2158
3 locks held by kworker/0:4/4270:
 #0: ffff888016870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
 #1: ffffc9000312fd00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
 #2: ffff888058779240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x271/0x3240 drivers/net/netdevsim/fib.c:1480
5 locks held by kworker/1:12/4289:
 #0: ffff8880b913a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
 #1: ffff8880b9127848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4d6/0x810 kernel/sched/psi.c:891
 #2: ffff888076b84d60 (&r->consumer_lock#2){+.+.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:368 [inline]
 #2: ffff888076b84d60 (&r->consumer_lock#2){+.+.}-{2:2}, at: ptr_ring_consume_bh include/linux/ptr_ring.h:365 [inline]
 #2: ffff888076b84d60 (&r->consumer_lock#2){+.+.}-{2:2}, at: wg_packet_encrypt_worker+0x11fd/0x1550 drivers/net/wireguard/send.c:293
 #3: ffff8880b903a318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
 #4: ffff8880b9027848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_enqueue kernel/sched/stats.h:102 [inline]
 #4: ffff8880b9027848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: enqueue_task+0x26d/0x2b0 kernel/sched/core.c:1973
3 locks held by kworker/1:18/4296:
 #0: ffff88814c778d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
 #1: ffff8880b9127848 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4d6/0x810 kernel/sched/psi.c:891
 #2: ffff888059bd4ee0 (&r->consumer_lock#2){+.+.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:368 [inline]
 #2: ffff888059bd4ee0 (&r->consumer_lock#2){+.+.}-{2:2}, at: ptr_ring_consume_bh include/linux/ptr_ring.h:365 [inline]
 #2: ffff888059bd4ee0 (&r->consumer_lock#2){+.+.}-{2:2}, at: wg_packet_decrypt_worker+0x8ed/0xda0 drivers/net/wireguard/receive.c:506
3 locks held by kworker/1:19/4297:
 #0: ffff88814c778d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x760/0x1000 kernel/workqueue.c:-1
 #1: ffffc9000322fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7a3/0x1000 kernel/workqueue.c:2285
 #2: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xc4/0x1520 net/ipv6/addrconf.c:4111
1 lock held by syz.2.18/5251:
1 lock held by syz.3.19/5273:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.4.20/5281:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.5.21/5664:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.6.22/5746:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.7.23/5846:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.8.24/5854:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.9.25/5856:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.0.26/5882:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.1.27/5897:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.2.28/5937:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.3.29/5984:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.4.30/5991:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.5.31/6026:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.6.32/6033:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.7.33/6054:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.8.34/6091:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.9.35/6130:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.0.36/6156:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.1.37/6164:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.2.38/6178:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.3.39/6195:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.4.40/6222:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.5.41/6292:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.6.42/6302:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.7.43/6324:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.8.44/6357:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.9.45/6363:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz.0.46/6386:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
1 lock held by syz-executor/6387:
 #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x974/0xe60 net/core/rtnetlink.c:5647
1 lock held by syz.1.47/6408:
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
 #0: ffff888145ffa0f8 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x17d6/0x1c70 block/ioctl.c:487
2 locks held by syz-executor/6417:
 #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x974/0xe60 net/core/rtnetlink.c:5647
 #1: ffffffff8c120da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
 #1: ffffffff8c120da8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x347/0x6b0 kernel/rcu/tree_exp.h:845
1 lock held by syz-executor/6425:
 #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:72 [inline]
 #0: ffffffff8d235f08 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x974/0xe60 net/core/rtnetlink.c:5647

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

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x397/0x3d0 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x163/0x280 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+0xe0f/0xe50 kernel/hung_task.c:369
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 3021 Comm: kworker/u4:4 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_preemption_disabled+0x18/0x110 lib/smp_processor_id.c:14
Code: 00 cc 48 c7 c7 a0 92 59 8a 48 c7 c6 e0 92 59 8a eb 00 55 41 57 41 56 53 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 <65> 8b 05 a9 d7 59 76 65 8b 0d 12 32 5a 76 f7 c1 ff ff ff 7f 74 1f
RSP: 0018:ffffc9000c8cfa48 EFLAGS: 00000286
RAX: 54d0869aaded1600 RBX: 0000000000000000 RCX: ffffffff815bf66b
RDX: 0000000000000000 RSI: ffffffff8a5992e0 RDI: ffffffff8a5992a0
RBP: ffffc9000c8cfbc0 R08: dffffc0000000000 R09: fffffbfff1ad2dce
R10: fffffbfff1ad2dce R11: 1ffffffff1ad2dcd R12: ffffffff8c11c320
R13: 1ffff92001919f60 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555862435c8 CR3: 0000000056daf000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 rcu_dynticks_curr_cpu_in_eqs kernel/rcu/tree.c:331 [inline]
 rcu_is_watching+0x11/0xa0 kernel/rcu/tree.c:1123
 trace_lock_acquire include/trace/events/lock.h:13 [inline]
 lock_acquire+0xcd/0x3f0 kernel/locking/lockdep.c:5594
 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:312
 rcu_read_lock include/linux/rcupdate.h:739 [inline]
 batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
 batadv_nc_worker+0xc9/0x5c0 net/batman-adv/network-coding.c:723
 process_one_work+0x863/0x1000 kernel/workqueue.c:2310
 worker_thread+0xaa8/0x12a0 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>