INFO: task syz-executor.3:18921 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00029-g615d30064886 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28848 pid:18921 tgid:18920 ppid:16861 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
super_lock+0x331/0x400 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+0x523/0xa30 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f05c267cda9
RSP: 002b:00007f05c342e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f05c27abf80 RCX: 00007f05c267cda9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffff80000800
RBP: 00007f05c26c947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000240 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f05c27abf80 R15: 00007ffd4af31d98
Showing all locks held in the system:
2 locks held by kworker/u4:0/11:
1 lock held by khungtaskd/29:
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4812:
#0: ffff88802977f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by kworker/0:3/5056:
#0: ffff888028d2d138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888028d2d138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900043f7d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900043f7d20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#2: ffffffff8eb48a48 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4129
2 locks held by syz-executor.0/5087:
#0: ffff8880353160e0 (&type->s_umount_key#91){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880353160e0 (&type->s_umount_key#91){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880353160e0 (&type->s_umount_key#91){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:509
#1: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#1: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:996
1 lock held by syz-executor.4/5108:
#0: ffff888036e400e0 (&type->s_umount_key#91){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888036e400e0 (&type->s_umount_key#91){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888036e400e0 (&type->s_umount_key#91){+.+.}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:509
2 locks held by kworker/0:8/5186:
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff88801308a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc90004a1fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc90004a1fd20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
1 lock held by syz-executor.3/16609:
1 lock held by syz-executor.3/20243:
#0: ffffffff8eb48a48 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8eb48a48 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x82c/0x1030 net/core/rtnetlink.c:6612
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00029-g615d30064886 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
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+0xfaf/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:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 16609 Comm: syz-executor.3 Not tainted 6.8.0-rc1-syzkaller-00029-g615d30064886 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__lock_acquire+0xe8b/0x1fd0
Code: c1 c1 c1 04 31 d9 44 01 e0 41 29 cc 89 ca c1 c2 06 44 31 e2 01 c1 29 d0 89 d6 c1 c6 08 31 c6 01 ca 29 f1 89 f3 c1 c3 10 31 cb <01> d6 29 da 89 dd c1 c5 13 31 d5 01 f3 29 ee 01 eb c1 c5 04 31 f5
RSP: 0018:ffffc900158c7570 EFLAGS: 00000006
RAX: 000000003bf535a3 RBX: 00000000464e403a RCX: 00000000f4e2b4fa
RDX: 00000000f9729d2d RSI: 00000000f4c0b2ac RDI: dffffc0000000000
RBP: ffff888077928ae8 R08: ffffffff90df73f7 R09: 1ffffffff21bee7e
R10: dffffc0000000000 R11: fffffbfff21bee7f R12: 0000000078702aa0
R13: ffff888077928000 R14: 0000000000000000 R15: ffff888077928000
FS: 00007f96343ff6c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555559b9978 CR3: 000000007a661000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
fs_reclaim_acquire+0xae/0x120 mm/page_alloc.c:3709
might_alloc include/linux/sched/mm.h:303 [inline]
bdev_getblk+0x42/0x600 fs/buffer.c:1425
__bread_gfp+0xac/0x420 fs/buffer.c:1474
sb_bread include/linux/buffer_head.h:321 [inline]
__exfat_ent_get fs/exfat/fatent.c:48 [inline]
exfat_ent_get+0x14d/0x400 fs/exfat/fatent.c:97
exfat_create_upcase_table+0x39f/0xfa0 fs/exfat/nls.c:795
__exfat_fill_super fs/exfat/super.c:594 [inline]
exfat_fill_super+0x119e/0x2a00 fs/exfat/super.c:646
get_tree_bdev+0x3f3/0x560 fs/super.c:1619
vfs_get_tree+0x8c/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_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f963507e4aa
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:00007f96343feef8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f96343fef80 RCX: 00007f963507e4aa
RDX: 0000000020001500 RSI: 0000000020000140 RDI: 00007f96343fef40
RBP: 0000000020001500 R08: 00007f96343fef80 R09: 0000000000000800
R10: 0000000000000800 R11: 0000000000000202 R12: 0000000020000140
R13: 00007f96343fef40 R14: 00000000000014fe R15: 0000000020004800