INFO: task syz.3.53:6046 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.53        state:D stack:26664 pid:6046  ppid:6034   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5382 [inline]
 __schedule+0x15ae/0x4660 kernel/sched/core.c:6701
 schedule+0xbd/0x170 kernel/sched/core.c:6775
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6834
 rwsem_down_write_slowpath+0xc3f/0x1020 kernel/locking/rwsem.c:1178
 __down_write_common kernel/locking/rwsem.c:1306 [inline]
 __down_write kernel/locking/rwsem.c:1315 [inline]
 down_write+0x1b9/0x200 kernel/locking/rwsem.c:1574
 inode_lock include/linux/fs.h:804 [inline]
 blk_ioctl_zeroout block/ioctl.c:191 [inline]
 blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
 blkdev_ioctl+0x512/0x730 block/ioctl.c:633
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl+0xfd/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f846419e0d9
RSP: 002b:00007ffd5069d158 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f8464425fa0 RCX: 00007f846419e0d9
RDX: 0000200000000000 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007f8464235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8464425fac R14: 00007f8464425fa0 R15: 00007f8464425fa0
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/28:
 #0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8d131da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5525:
 #0: ffff88814ce690a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x428/0x1370 drivers/tty/n_tty.c:2217
1 lock held by udevd/5931:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:814 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_read_iter+0x33a/0x480 block/fops.c:743
2 locks held by syz.2.52/6032:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
 #1: ffff888020112110 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:849 [inline]
 #1: ffff888020112110 (mapping.invalidate_lock){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:192 [inline]
 #1: ffff888020112110 (mapping.invalidate_lock){++++}-{3:3}, at: blkdev_common_ioctl+0x1c62/0x2580 block/ioctl.c:519
1 lock held by syz.3.53/6046:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.4.54/6078:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.5.55/6353:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.6.56/6377:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.7.57/6397:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.8.58/6427:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.9.59/6454:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.0.60/6722:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
1 lock held by syz.1.61/7104:
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:804 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:191 [inline]
 #0: ffff888020111f80 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_common_ioctl+0x1c28/0x2580 block/ioctl.c:519
5 locks held by rm/7366:

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

NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x3a6/0x3e0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 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+0xf59/0xfa0 kernel/hung_task.c:379
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 7372 Comm: dhcpcd-run-hook Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:match_held_lock+0xc/0xb0 kernel/locking/lockdep.c:5203
Code: c7 c6 c0 ca ca 8a e8 73 df c1 f6 0f 0b eb b6 e8 ba f9 ff ff 66 2e 0f 1f 84 00 00 00 00 00 b9 01 00 00 00 48 39 77 10 74 6c 53 <81> 7f 20 00 00 20 00 72 5f 48 8b 46 08 48 85 c0 75 17 48 89 fb 48
RSP: 0018:ffffc9000bebf428 EFLAGS: 00000087
RAX: 0000000000000003 RBX: ffff88807ad08000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8d131e00 RDI: ffff88807ad08b38
RBP: 00000000ffffffff R08: ffff8880265976c7 R09: 1ffff11004cb2ed8
R10: dffffc0000000000 R11: ffffed1004cb2ed9 R12: 0000000000000002
R13: 0000000000000246 R14: ffffffff8d131e00 R15: ffff88807ad08b38
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f103dade286 CR3: 00000000789ec000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __lock_is_held kernel/locking/lockdep.c:5495 [inline]
 lock_is_held_type+0xaa/0x190 kernel/locking/lockdep.c:5825
 lock_is_held include/linux/lockdep.h:288 [inline]
 __might_resched+0x9f/0x5f0 kernel/sched/core.c:10174
 down_write+0x77/0x200 kernel/locking/rwsem.c:1572
 lock_anon_vma_root mm/rmap.c:251 [inline]
 unlink_anon_vmas+0x100/0x660 mm/rmap.c:409
 free_pgtables+0x4ef/0x770 mm/memory.c:400
 exit_mmap+0x420/0xb90 mm/mmap.c:3313
 __mmput+0x118/0x3a0 kernel/fork.c:1362
 exec_mmap+0x59a/0x650 fs/exec.c:1036
 begin_new_exec+0xa4e/0x1ef0 fs/exec.c:1294
 load_elf_binary+0x9ee/0x2850 fs/binfmt_elf.c:1027
 search_binary_handler fs/exec.c:1775 [inline]
 exec_binprm fs/exec.c:1817 [inline]
 bprm_execve+0xb0b/0x1730 fs/exec.c:1892
 do_execveat_common+0x501/0x6b0 fs/exec.c:1998
 do_execve fs/exec.c:2072 [inline]
 __do_sys_execve fs/exec.c:2148 [inline]
 __se_sys_execve fs/exec.c:2143 [inline]
 __x64_sys_execve+0x92/0xa0 fs/exec.c:2143
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f103da24107
Code: Unable to access opcode bytes at 0x7f103da240dd.
RSP: 002b:00007ffe38abac88 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 000055f121ca9078 RCX: 00007f103da24107
RDX: 000055f121ca90a0 RSI: 000055f121ca9078 RDI: 000055f121ca9130
RBP: 000055f121ca9130 R08: 00007ffe38abfebd R09: 0000000000000000
R10: 0000000000000008 R11: 0000000000000246 R12: 000055f121ca90a0
R13: 00007f103dbe9e8b R14: 000055f121ca90a0 R15: 0000000000000000
 </TASK>