INFO: task syz.0.4999:6180 blocked for more than 143 seconds.
Not tainted 6.14.0-rc5-syzkaller-00023-gbb2281fb05e5 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.4999 state:D stack:23872 pid:6180 tgid:6180 ppid:3316 task_flags:0x440040 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5378 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6765
__schedule_loop kernel/sched/core.c:6842 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6857
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6914
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229
do_sync_mmap_readahead+0x4a6/0x990
filemap_fault+0x89e/0x16c0 mm/filemap.c:3447
__do_fault+0x135/0x390 mm/memory.c:4988
do_shared_fault mm/memory.c:5467 [inline]
do_fault mm/memory.c:5541 [inline]
do_pte_missing mm/memory.c:4058 [inline]
handle_pte_fault mm/memory.c:5900 [inline]
__handle_mm_fault+0x220a/0x70f0 mm/memory.c:6043
handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6212
do_user_addr_fault arch/x86/mm/fault.c:1337 [inline]
handle_page_fault arch/x86/mm/fault.c:1480 [inline]
exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1538
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f3618b54ed8
RSP: 002b:00007f3618ecfb88 EFLAGS: 00010202
RAX: 0000400000000000 RBX: 0000000000000004 RCX: 006f72657a2f7665
RDX: 000000000000000a RSI: 72657a2f7665642f RDI: 0000400000000000
RBP: 00007f3618da7ba0 R08: 00007f3618a00000 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000009 R12: 00007f3618da616c
R13: 00007f3618da6160 R14: fffffffffffffffe R15: 00007f3618ecfca0
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8eb392e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
1 lock held by udevd/5210:
#0: ffff8880b863e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
2 locks held by getty/5587:
#0: ffff8880318270a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
3 locks held by kworker/u9:3/27544:
#0: ffff88807cc57148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3213 [inline]
#0: ffff88807cc57148 ((wq_completion)hci2){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3319
#1: ffffc90004e8fc60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3214 [inline]
#1: ffffc90004e8fc60 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3319
#2: ffff888059c00d80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1ec/0x400 net/bluetooth/hci_sync.c:331
3 locks held by kworker/u8:24/4428:
3 locks held by kworker/u8:26/4431:
#0: ffff8880b863e958 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb0/0x140 kernel/sched/core.c:606
#1: ffff8880b8728948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x41d/0x7a0 kernel/sched/psi.c:987
#2: ffff888056910768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6061 [inline]
#2: ffff888056910768 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xcf/0x490 net/wireless/core.c:421
1 lock held by syz.5.4925/5674:
1 lock held by syz.0.4999/6180:
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229
1 lock held by syz.3.5162/7154:
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229
1 lock held by syz.4.5337/8321:
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock include/linux/fs.h:922 [inline]
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: blkdev_fallocate+0x20e/0x490 block/fops.c:839
1 lock held by syz.1.5396/8805:
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229
1 lock held by syz.1.5396/8806:
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:932 [inline]
#0: ffff888148d442c0 (mapping.invalidate_lock#2){++++}-{4:4}, at: page_cache_ra_unbounded+0x156/0x820 mm/readahead.c:229
5 locks held by dhcpcd-run-hook/9630:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc5-syzkaller-00023-gbb2281fb05e5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 5149 Comm: kworker/u9:1 Not tainted 6.14.0-rc5-syzkaller-00023-gbb2281fb05e5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: hci2 hci_cmd_timeout
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3800 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3819 [inline]
RIP: 0010:validate_chain+0x1e6/0x5920 kernel/locking/lockdep.c:3874
Code: 89 df e8 ad 8c 8b 00 48 89 5c 24 48 48 8b 1b 48 85 db 74 48 48 83 c3 f8 74 42 4c 8d 7b 18 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 80 8c 8b 00 49 8b 07 4c 39 f0 0f 84 83 03 00 00
RSP: 0000:ffffc90010886d20 EFLAGS: 00000046
RAX: 1ffffffff290d42b RBX: ffffffff9486a140 RCX: ffffffff819d7d1e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff94549848
RBP: ffffc90010887020 R08: ffffffff9454984f R09: 1ffffffff28a9309
R10: dffffc0000000000 R11: fffffbfff28a930a R12: dffffc0000000000
R13: ffff88803562aa00 R14: 6b3465018ff9d7dc R15: ffffffff9486a158
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f03053644b8 CR3: 00000000588fe000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000097 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0xd5/0x120 kernel/locking/spinlock.c:162
uart_port_lock_irqsave include/linux/serial_core.h:715 [inline]
serial8250_console_write+0x1ae/0x1e00 drivers/tty/serial/8250/8250_port.c:3424
console_emit_next_record kernel/printk/printk.c:3122 [inline]
console_flush_all+0x869/0xeb0 kernel/printk/printk.c:3210
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0x14f/0x3b0 kernel/printk/printk.c:3309
vprintk_emit+0x730/0xa10 kernel/printk/printk.c:2432
_printk+0xd5/0x120 kernel/printk/printk.c:2457
bt_err+0x127/0x180 net/bluetooth/lib.c:296
hci_cmd_timeout+0xdd/0x1e0 net/bluetooth/hci_core.c:1452
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd30 kernel/workqueue.c:3400
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244