INFO: task syz-executor.2:24028 blocked for more than 143 seconds.
Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:25112 pid:24028 tgid:24026 ppid:17835 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
super_lock+0x335/0x400 fs/super.c:114
user_get_super+0xd2/0x180 fs/super.c:993
quotactl_block fs/quota/quota.c:890 [inline]
__do_sys_quotactl fs/quota/quota.c:955 [inline]
__se_sys_quotactl+0x52a/0xa30 fs/quota/quota.c:917
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f231287dda9
RSP: 002b:00007f23136020c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f23129abf80 RCX: 00007f231287dda9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffff80000800
RBP: 00007f23128ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f23129abf80 R15: 00007fffb8aedb88
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4809:
#0: ffff88802b32d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.0/5082:
#0: ffffffff8e1365f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8e1365f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:995
4 locks held by syz-executor.1/5083:
2 locks held by kworker/1:4/5132:
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888014c8e538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90004ac7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90004ac7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
1 lock held by syz-executor.2/17596:
3 locks held by syz-executor.2/28003:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17596 Comm: syz-executor.2 Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:lookup_bh_lru fs/buffer.c:1373 [inline]
RIP: 0010:__find_get_block+0xda1/0x10d0 fs/buffer.c:1397
Code: 00 00 00 00 fc ff df e9 0c fa ff ff 4c 89 f6 48 f7 de 31 ff e8 b0 e9 7e ff 4d 85 f6 75 10 e8 c6 e4 7e ff eb 4c e8 bf e4 7e ff <49> 83 c5 f8 49 ff c6 48 c7 c7 60 9a b8 8b e8 0c 96 49 09 48 c7 c7
RSP: 0018:ffffc90013fc75c0 EFLAGS: 00000093
RAX: ffffffff82148771 RBX: 0000000000000200 RCX: ffff8880209b1dc0
RDX: 0000000000000000 RSI: ffffffff8bb89a40 RDI: ffffffff8bfd9a20
RBP: ffffc90013fc7700 R08: ffffffff82148760 R09: 1ffffffff2892694
R10: dffffc0000000000 R11: fffffbfff2892695 R12: ffff888073e175d0
R13: 00000000000380e8 R14: fffffffffffffffa R15: 0000000000000200
FS: 00007fdbd05276c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff9f55ff000 CR3: 0000000029596000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bdev_getblk+0x38/0x610 fs/buffer.c:1423
__bread_gfp+0xac/0x430 fs/buffer.c:1474
sb_bread include/linux/buffer_head.h:321 [inline]
exfat_get_dentry+0x53b/0x730 fs/exfat/dir.c:770
exfat_create_upcase_table+0x259/0xfa0 fs/exfat/nls.c:764
__exfat_fill_super fs/exfat/super.c:594 [inline]
exfat_fill_super+0x119e/0x2a00 fs/exfat/super.c:646
get_tree_bdev+0x3f7/0x570 fs/super.c:1619
vfs_get_tree+0x90/0x2a0 fs/super.c:1784
do_new_mount+0x2be/0xb40 fs/namespace.c:3352
do_mount fs/namespace.c:3692 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fdbcf87f4aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007fdbd0526ef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fdbd0526f80 RCX: 00007fdbcf87f4aa
RDX: 0000000020001500 RSI: 0000000020000140 RDI: 00007fdbd0526f40
RBP: 0000000020001500 R08: 00007fdbd0526f80 R09: 0000000000000800
R10: 0000000000000800 R11: 0000000000000202 R12: 0000000020000140
R13: 00007fdbd0526f40 R14: 00000000000014fe R15: 0000000020000440