INFO: task syz.9.1450:12151 blocked for more than 143 seconds.
Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.1450 state:D stack:27520 pid:12151 tgid:12150 ppid:11195 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1526
i_mmap_lock_read include/linux/fs.h:529 [inline]
rmap_walk_file+0x54b/0x690 mm/rmap.c:2694
rmap_walk+0x7a/0xd0 mm/rmap.c:2726
remove_migration_ptes+0x11e/0x1b0 mm/migrate.c:373
unmap_and_move_huge_page mm/migrate.c:1526 [inline]
migrate_hugetlbs mm/migrate.c:1648 [inline]
migrate_pages+0xa3d/0x21f0 mm/migrate.c:2046
migrate_to_node mm/mempolicy.c:1099 [inline]
do_migrate_pages+0x486/0x740 mm/mempolicy.c:1198
kernel_migrate_pages+0x5b2/0x750 mm/mempolicy.c:1713
__do_sys_migrate_pages mm/mempolicy.c:1731 [inline]
__se_sys_migrate_pages mm/mempolicy.c:1727 [inline]
__x64_sys_migrate_pages+0x96/0x100 mm/mempolicy.c:1727
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffad2d7ff19
RSP: 002b:00007ffad3c65058 EFLAGS: 00000246 ORIG_RAX: 0000000000000100
RAX: ffffffffffffffda RBX: 00007ffad2f45fa0 RCX: 00007ffad2d7ff19
RDX: 00000000200002c0 RSI: 0000000000000003 RDI: 0000000000000000
RBP: 00007ffad2df3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000280 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffad2f45fa0 R15: 00007ffeb37e2078
INFO: task syz.9.1450:12190 blocked for more than 145 seconds.
Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.9.1450 state:D stack:28608 pid:12190 tgid:12150 ppid:11195 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
io_schedule+0xbf/0x130 kernel/sched/core.c:7681
folio_wait_bit_common+0x3d8/0x9b0 mm/filemap.c:1308
__folio_lock mm/filemap.c:1646 [inline]
folio_lock include/linux/pagemap.h:1151 [inline]
folio_lock include/linux/pagemap.h:1147 [inline]
__filemap_get_folio+0x6a4/0xaf0 mm/filemap.c:1899
filemap_lock_folio include/linux/pagemap.h:788 [inline]
filemap_lock_hugetlb_folio include/linux/hugetlb.h:789 [inline]
hugetlbfs_zero_partial_page+0xaf/0x520 fs/hugetlbfs/inode.c:661
hugetlbfs_punch_hole fs/hugetlbfs/inode.c:715 [inline]
hugetlbfs_fallocate+0xe12/0x11d0 fs/hugetlbfs/inode.c:748
vfs_fallocate+0x459/0xf90 fs/open.c:327
madvise_remove mm/madvise.c:1020 [inline]
madvise_vma_behavior+0x1b6d/0x1da0 mm/madvise.c:1255
madvise_walk_vmas+0x1cf/0x2c0 mm/madvise.c:1497
do_madvise+0x30e/0x770 mm/madvise.c:1684
__do_sys_madvise mm/madvise.c:1700 [inline]
__se_sys_madvise mm/madvise.c:1698 [inline]
__x64_sys_madvise+0xa9/0x110 mm/madvise.c:1698
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ffad2d7ff19
RSP: 002b:00007ffad3c44058 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007ffad2f46080 RCX: 00007ffad2d7ff19
RDX: 0000000000000009 RSI: 0000000000600002 RDI: 0000000020000000
RBP: 00007ffad2df3cc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffad2f46080 R15: 00007ffeb37e2078
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bb500 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by getty/5570:
#0: ffff8880365820a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
7 locks held by kworker/0:3/5861:
2 locks held by kworker/0:4/5862:
2 locks held by kworker/0:5/5863:
2 locks held by kworker/0:9/8850:
3 locks held by kworker/1:8/9557:
#0: ffff88801b078948 (
(wq_completion)events){+.+.}-{0:0}
, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000c317d80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
#2: ffffffff8e1c6e38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
5 locks held by kworker/u8:13/9676:
7 locks held by kworker/0:10/9721:
3 locks held by syz-executor/10073:
#0: ffff88804baecd80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
#1: ffff88804baec078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x3ab/0x11a0 net/bluetooth/hci_sync.c:5200
#2: ffffffff8e1c6e38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
1 lock held by syz.9.1450/12151:
#0: ffff88803487e278 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:529 [inline]
#0: ffff88803487e278 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: rmap_walk_file+0x54b/0x690 mm/rmap.c:2694
3 locks held by syz.9.1450/12190:
#0: ffff888145a8c420 (sb_writers#14){.+.+}-{0:0}, at: madvise_remove mm/madvise.c:1020 [inline]
#0: ffff888145a8c420 (sb_writers#14){.+.+}-{0:0}, at: madvise_vma_behavior+0x1b6d/0x1da0 mm/madvise.c:1255
#1: ffff88803487dfa8 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#1: ffff88803487dfa8 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:690 [inline]
#1: ffff88803487dfa8 (&sb->s_type->i_mutex_key#21){+.+.}-{4:4}, at: hugetlbfs_fallocate+0xc27/0x11d0 fs/hugetlbfs/inode.c:748
#2: ffff88803487e278 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: i_mmap_lock_write include/linux/fs.h:509 [inline]
#2: ffff88803487e278 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_punch_hole fs/hugetlbfs/inode.c:698 [inline]
#2: ffff88803487e278 (&hugetlbfs_i_mmap_rwsem_key){++++}-{4:4}, at: hugetlbfs_fallocate+0xc94/0x11d0 fs/hugetlbfs/inode.c:748
3 locks held by syz.0.1811/14232:
#0: ffff88805c2c4d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_dev_do_close+0x26/0x90 net/bluetooth/hci_core.c:481
#1: ffff88805c2c4078 (&hdev->lock){+.+.}-{4:4}, at: hci_dev_close_sync+0x3ab/0x11a0 net/bluetooth/hci_sync.c:5200
#2: ffffffff90142dc8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_disconn_cfm include/net/bluetooth/hci_core.h:2047 [inline]
#2: ffffffff90142dc8 (hci_cb_list_lock){+.+.}-{4:4}, at: hci_conn_hash_flush+0xbb/0x260 net/bluetooth/hci_conn.c:2698
1 lock held by syz.4.1813/14233:
1 lock held by syz.3.1812/14234:
#0: ffffffff8feda988 (rtnl_mutex){+.+.}-{4:4}, at: tun_detach drivers/net/tun.c:698 [inline]
#0: ffffffff8feda988 (rtnl_mutex){+.+.}-{4:4}, at: tun_chr_close+0x38/0x230 drivers/net/tun.c:3517
2 locks held by rm/14237:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5862 Comm: kworker/0:4 Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: events dvb_usb_read_remote_control
RIP: 0010:delay_tsc+0x32/0xc0 arch/x86/lib/delay.c:79
Code: fd bf 01 00 00 00 41 54 55 53 e8 f9 a3 40 f6 e8 34 24 01 00 41 89 c4 0f 01 f9 66 90 48 c1 e2 20 48 09 c2 48 89 d5 eb 16 f3 90 01 00 00 00 e8 d4 a3 40 f6 e8 0f 24 01 00 44 39 e0 75 36 0f 01
RSP: 0018:ffffc90003527760 EFLAGS: 00000002
RAX: 0000000000000002 RBX: 0000022d2ab9991a RCX: 0000000000000000
RDX: 0000000000000003 RSI: ffffffff8bd1d2c0 RDI: 0000000000000001
RBP: 0000022d2ab98f4b R08: 0000000000000005 R09: 0000000000000000
R10: 00000000000026c9 R11: 0000000000000006 R12: 0000000000000000
R13: 0000000000000af1 R14: fffffbfff35615d6 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa932a5e683 CR3: 00000000307bc000 CR4: 00000000003526f0
DR0: fffffffffffffffc DR1: 0000000080000000 DR2: 0008000080000001
DR3: fffffffffffffffc DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
udelay include/asm-generic/delay.h:62 [inline]
wait_for_lsr+0x96/0x180 drivers/tty/serial/8250/8250_port.c:2093
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3334 [inline]
serial8250_console_write+0xf5a/0x17c0 drivers/tty/serial/8250/8250_port.c:3412
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x800/0xc60 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86
_printk+0xc8/0x100 kernel/printk/printk.c:2457
m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline]
m920x_rc_core_query+0x2d7/0x500 drivers/media/usb/dvb-usb/m920x.c:229
dvb_usb_read_remote_control+0xda/0x1c0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244