INFO: task syz-executor.0:5607 blocked for more than 143 seconds.
Not tainted 6.12.0-rc4-next-20241025-syzkaller-ga39230ecf6b3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26400 pid:5607 tgid:5606 ppid:5541 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5327 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6707
__schedule_loop kernel/sched/core.c:6784 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6799
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6856
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x7e7/0xee0 kernel/locking/mutex.c:735
nbd_start_device_ioctl drivers/block/nbd.c:1479 [inline]
__nbd_ioctl drivers/block/nbd.c:1539 [inline]
nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1579
blkdev_ioctl+0x57d/0x6a0 block/ioctl.c:693
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae9fe7c8d9
RSP: 002b:00007faea0b0e0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fae9ff9bf80 RCX: 00007fae9fe7c8d9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fae9fed8b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fae9ff9bf80 R15: 00007ffc9f29f718
INFO: task syz-executor.0:5613 blocked for more than 143 seconds.
Not tainted 6.12.0-rc4-next-20241025-syzkaller-ga39230ecf6b3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27480 pid:5613 tgid:5606 ppid:5541 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5327 [inline]
__schedule+0x184f/0x4c30 kernel/sched/core.c:6707
__schedule_loop kernel/sched/core.c:6784 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6799
blk_mq_freeze_queue_wait+0xff/0x190 block/blk-mq.c:139
nbd_add_socket+0x1a5/0x8f0 drivers/block/nbd.c:1189
__nbd_ioctl drivers/block/nbd.c:1522 [inline]
nbd_ioctl+0x5c3/0xf40 drivers/block/nbd.c:1579
blkdev_ioctl+0x57d/0x6a0 block/ioctl.c:693
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fae9fe7c8d9
RSP: 002b:00007faea0aed0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fae9ff9c050 RCX: 00007fae9fe7c8d9
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00007fae9fed8b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fae9ff9c050 R15: 00007ffc9f29f718
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e939d20 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e939d20 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e939d20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6744
2 locks held by getty/4998:
#0: ffff8880328ea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
1 lock held by udevd/5559:
#0: ffff8880251ff4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/5607:
#0: ffff8880252b8198 (&nbd->config_lock){+.+.}-{4:4}, at: nbd_start_device_ioctl drivers/block/nbd.c:1479 [inline]
#0: ffff8880252b8198 (&nbd->config_lock){+.+.}-{4:4}, at: __nbd_ioctl drivers/block/nbd.c:1539 [inline]
#0: ffff8880252b8198 (&nbd->config_lock){+.+.}-{4:4}, at: nbd_ioctl+0xbdb/0xf40 drivers/block/nbd.c:1579
1 lock held by syz-executor.0/5613:
#0: ffff8880252b8198 (&nbd->config_lock){+.+.}-{4:4}, at: nbd_ioctl+0x13c/0xf40 drivers/block/nbd.c:1572
1 lock held by syz-executor.0/5916:
#0: ffff8880251ff4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/5917:
#0: ffff8880251ff4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/5933:
#0: ffff8880251ff4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
1 lock held by syz-executor.0/5934:
#0: ffff8880251ff4c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:904
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc4-next-20241025-syzkaller-ga39230ecf6b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
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: 3000 Comm: kworker/u8:10 Not tainted 6.12.0-rc4-next-20241025-syzkaller-ga39230ecf6b3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:86 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x79/0x290 mm/kasan/generic.c:189
Code: 4d 89 c1 49 c1 e9 03 49 be 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 <4c> 89 cd 48 f7 d5 48 01 dd 41 80 3b 00 0f 85 c9 01 00 00 49 ff c3
RSP: 0018:ffffc90009f07590 EFLAGS: 00000002
RAX: 0000000000000001 RBX: 1ffffffff2858309 RCX: ffffffff8171162e
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff942c1848
RBP: 0000000000000001 R08: ffffffff942c184f R09: 1ffffffff2858309
R10: dffffc0000000000 R11: fffffbfff2858309 R12: dffffc0000000000
R13: ffff88802f7a2900 R14: dffffc0000000001 R15: fffffbfff285830a
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000559332cb2680 CR3: 000000007da64000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class kernel/locking/lockdep.c:228 [inline]
lookup_chain_cache_add kernel/locking/lockdep.c:3816 [inline]
validate_chain+0x11e/0x5920 kernel/locking/lockdep.c:3872
__lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5226
lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849
__raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline]
_raw_spin_lock_irq+0xd3/0x120 kernel/locking/spinlock.c:170
process_one_work kernel/workqueue.c:3264 [inline]
process_scheduled_works+0xd2d/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244