INFO: task syz-executor.4:5442 blocked for more than 143 seconds.
Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28784 pid:5442 tgid:5441 ppid:5078 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5c70 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6828
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6885
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
bdev_release+0x161/0xb30 block/bdev.c:1028
blkdev_release+0x15/0x20 block/fops.c:628
__fput+0x270/0xb80 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
get_signal+0x105e/0x2760 kernel/signal.c:2683
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:212
do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f57c3c7de69
RSP: 002b:00007f57c49d80c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f57c3dabf80 RCX: 00007f57c3c7de69
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f57c3cca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f57c3dabf80 R15: 00007ffffa0610b8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7b08e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:4/60:
1 lock held by udevd/4513:
2 locks held by getty/4818:
#0: ffff88802aa7c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015f02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by udevd/5075:
#0: ffff88802091c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.1/5077:
1 lock held by udevd/5097:
#0: ffff88801d49c2c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:848 [inline]
#0: ffff88801d49c2c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0x138/0x5f0 mm/readahead.c:225
1 lock held by syz-executor.4/5442:
#0: ffff88802091c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x161/0xb30 block/bdev.c:1028
1 lock held by udevd/5745:
#0: ffff8880206e54c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.0/5776:
#0: ffff8880206e54c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x161/0xb30 block/bdev.c:1028
1 lock held by udevd/5802:
#0: ffff8880209894c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.3/5925:
#0: ffff8880209894c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x161/0xb30 block/bdev.c:1028
1 lock held by syz-executor.0/6061:
#0: ffff8880206e54c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x444/0xe30 block/bdev.c:862
1 lock held by syz-executor.4/6535:
#0: ffff88801506baa0 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:124 [inline]
#0: ffff88801506baa0 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x160/0x3c0 mm/util.c:571
2 locks held by syz-executor.4/6537:
#0: ffffffff8f2e1650 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2cb/0x670 net/core/net_namespace.c:501
#1: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: register_netdev+0x13/0x50 net/core/dev.c:10402
2 locks held by syz-executor.3/6556:
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
#1: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#1: ffffffff8d7bc4b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.2/6561:
2 locks held by syz-executor.2/6562:
#0: ffff8880242cb678 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x154/0x9b0 net/netlink/af_netlink.c:2350
#1: ffffffff8f2f63c8 (rtnl_mutex){+.+.}-{3:3}, at: netlink_dump+0x58c/0xe00 net/netlink/af_netlink.c:2268
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/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+0xf86/0x1210 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:243
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 5611 Comm: syz-executor.4 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:load_new_mm_cr3+0x28/0x90 arch/x86/mm/tlb.c:300
Code: 90 90 84 c9 41 54 49 89 d4 55 48 89 fd 53 0f b7 de 74 20 89 df e8 28 ff ff ff 4c 89 e2 89 de 48 89 ef e8 fb fd ff ff 0f 22 d8 <5b> 5d 41 5c c3 cc cc cc cc 48 c7 c0 38 57 9e 8f 48 ba 00 00 00 00
RSP: 0018:ffffc90002f7fa08 EFLAGS: 00000046
RAX: 000000005a7e8000 RBX: 0000000000000000 RCX: ffffffff813df70c
RDX: ffff8880295a9e00 RSI: ffffffff813df716 RDI: 0000000000000007
RBP: ffff88805a7e8000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000000000
R13: 000000000003d4e8 R14: ffff88807dd57200 R15: 000000000000053a
FS: 0000555581b81480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b3082e000 CR3: 000000005a7e8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
switch_mm_irqs_off+0x67d/0xbc0 arch/x86/mm/tlb.c:643
context_switch kernel/sched/core.c:5393 [inline]
__schedule+0xd2b/0x5c70 kernel/sched/core.c:6736
__schedule_loop kernel/sched/core.c:6813 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6828
do_nanosleep+0x216/0x510 kernel/time/hrtimer.c:2051
hrtimer_nanosleep+0x1ab/0x440 kernel/time/hrtimer.c:2104
common_nsleep+0xa1/0xd0 kernel/time/posix-timers.c:1350
__do_sys_clock_nanosleep kernel/time/posix-timers.c:1396 [inline]
__se_sys_clock_nanosleep kernel/time/posix-timers.c:1373 [inline]
__x64_sys_clock_nanosleep+0x344/0x4a0 kernel/time/posix-timers.c:1373
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd2/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fb723ea9275
Code: Unable to access opcode bytes at 0x7fb723ea924b.
RSP: 002b:00007ffd91643b10 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 00000000000000a7 RCX: 00007fb723ea9275
RDX: 00007ffd91643b50 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd91643bdc R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 00000000000445dc R14: 0000000000043eb2 R15: 0000000000000006