INFO: task syz-executor.5:6106 blocked for more than 143 seconds.
Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:27528 pid:6106 ppid:32662 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5382 [inline]
__schedule+0x196c/0x4af0 kernel/sched/core.c:6695
schedule+0xc3/0x180 kernel/sched/core.c:6771
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6830
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6a3/0xd60 kernel/locking/mutex.c:747
blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
blkdev_open+0x14c/0x330 block/fops.c:589
do_dentry_open+0x80f/0x1430 fs/open.c:929
do_open fs/namei.c:3639 [inline]
path_openat+0x27bb/0x3180 fs/namei.c:3796
do_filp_open+0x234/0x490 fs/namei.c:3823
do_sys_openat2+0x13e/0x1d0 fs/open.c:1422
do_sys_open fs/open.c:1437 [inline]
__do_sys_openat fs/open.c:1453 [inline]
__se_sys_openat fs/open.c:1448 [inline]
__x64_sys_openat+0x247/0x290 fs/open.c:1448
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f7af8c7cae9
RSP: 002b:00007f7af99bd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f7af8d9bf80 RCX: 00007f7af8c7cae9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: ffffffffffffff9c
RBP: 00007f7af8cc847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7af8d9bf80 R15: 00007ffcdb488698
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8d32c4a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8d32c4a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8d32c4a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
1 lock held by kcompactd0/33:
3 locks held by kworker/u4:10/1265:
2 locks held by getty/4798:
#0: ffff88802ab820a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2206
1 lock held by syz-executor.5/29920:
1 lock held by syz-executor.5/32517:
1 lock held by syz-executor.0/1419:
2 locks held by syz-executor.0/4120:
4 locks held by kworker/0:4/4292:
#0: ffff8880b983c318 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:999
#2: ffff8880b98296d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999
#3: ffffffff920d4260 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x163/0x530 lib/debugobjects.c:717
1 lock held by syz-executor.0/6093:
1 lock held by syz-executor.5/6106:
#0: ffff88801d32d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
1 lock held by syz-executor.0/6276:
#0: ffff88801d32d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
1 lock held by syz-executor.5/6282:
#0: ffff88801d32d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
1 lock held by syz-executor.0/6425:
#0: ffff88801d32d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
1 lock held by syz-executor.5/6433:
#0: ffff88801d32d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
1 lock held by syz-executor.5/6434:
#0: ffff88801d32d4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x137/0x620 block/bdev.c:786
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 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+0xfa9/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 32517 Comm: syz-executor.5 Not tainted 6.6.0-rc2-syzkaller-00018-g2cf0f7156238 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:67 [inline]
RIP: 0010:check_preemption_disabled+0x59/0x110 lib/smp_processor_id.c:19
Code: 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 c7 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 48 c7 04 24 00 00 00 00 9c <8f> 04 24 f7 04 24 00 02 00 00 74 c9 49 89 f6 49 89 ff 65 4c 8b 25
RSP: 0018:ffffc9000e7bf778 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000080000000
RDX: ffff888016f60000 RSI: ffffffff8b0ab180 RDI: ffffffff8b5996a0
RBP: 00000000ffffffff R08: ffffffff8ac8dc87 R09: 1ffffffff20df270
R10: dffffc0000000000 R11: fffffbfff20df271 R12: 0000000000000246
R13: ffff888016f60000 R14: 00000000ffffffff R15: ffffffff8d32c4a0
FS: 00007f71bab2e6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bbc972866 CR3: 00000000ac226000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_is_held_type+0x7a/0x190 kernel/locking/lockdep.c:5823
xa_head include/linux/xarray.h:1200 [inline]
xas_start+0x2d7/0x7b0 lib/xarray.c:190
xas_load lib/xarray.c:237 [inline]
xa_load+0x205/0x480 lib/xarray.c:1461
__readahead_folio include/linux/pagemap.h:1332 [inline]
readahead_folio include/linux/pagemap.h:1365 [inline]
mpage_readahead+0x1fb/0x920 fs/mpage.c:378
read_pages+0x183/0x830 mm/readahead.c:160
page_cache_ra_unbounded+0x68e/0x7c0 mm/readahead.c:269
do_page_cache_ra mm/readahead.c:299 [inline]
force_page_cache_ra+0x2a7/0x310 mm/readahead.c:330
force_page_cache_readahead mm/internal.h:130 [inline]
generic_fadvise+0x528/0x830 mm/fadvise.c:106
vfs_fadvise mm/fadvise.c:185 [inline]
ksys_fadvise64_64 mm/fadvise.c:199 [inline]
__do_sys_fadvise64 mm/fadvise.c:214 [inline]
__se_sys_fadvise64 mm/fadvise.c:212 [inline]
__x64_sys_fadvise64+0x13f/0x180 mm/fadvise.c:212
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f71b9e7cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f71bab2e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000dd
RAX: ffffffffffffffda RBX: 00007f71b9f9bf80 RCX: 00007f71b9e7cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f71b9ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f71b9f9bf80 R15: 00007fffaa908488