INFO: task syz-executor.2:5064 blocked for more than 143 seconds.
Not tainted 6.6.0-rc6-syzkaller-00043-gdd72f9c7e512 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:19984 pid:5064 ppid:1 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
rwsem_down_write_slowpath+0xee6/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
__super_lock fs/super.c:56 [inline]
__super_lock_excl fs/super.c:71 [inline]
deactivate_super+0xad/0xf0 fs/super.c:513
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1254
task_work_run+0x24a/0x300 kernel/task_work.c:180
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fd649a7de17
RSP: 002b:00007ffcc48d7eb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd649a7de17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffcc48d7f70
RBP: 00007ffcc48d7f70 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffcc48d9030
R13: 00007fd649ac73b9 R14: 00000000001c7b6b R15: 0000000000000002
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d32c460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:303 [inline]
#0: ffffffff8d32c460 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:749 [inline]
#0: ffffffff8d32c460 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
2 locks held by getty/4789:
#0: ffff88802a2320a0 (&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.2/5064:
#0: ffff888026d960e0 (&type->s_umount_key#24){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888026d960e0 (&type->s_umount_key#24){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888026d960e0 (&type->s_umount_key#24){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:513
2 locks held by kworker/u4:3/31054:
4 locks held by syz-executor.3/14850:
1 lock held by syz-executor.3/14939:
#0: ffff888026d960e0 (&type->s_umount_key#24){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff888026d960e0 (&type->s_umount_key#24){++++}-{3:3}, at: super_lock+0x176/0x390 fs/super.c:117
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.6.0-rc6-syzkaller-00043-gdd72f9c7e512 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 14850 Comm: syz-executor.3 Not tainted 6.6.0-rc6-syzkaller-00043-gdd72f9c7e512 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/06/2023
RIP: 0010:mempool_is_saturated include/linux/mempool.h:35 [inline]
RIP: 0010:bio_alloc_bioset+0x2f7/0x13f0 block/bio.c:551
Code: 6f fd 89 6c 24 08 89 6c 24 0c 48 89 5c 24 30 49 8d 7c 24 5c 48 89 f8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30 <84> c0 0f 85 b4 0c 00 00 41 8b 5c 24 5c 49 8d 7c 24 58 48 89 f8 48
RSP: 0000:ffffc900051672c8 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffffff9208b258 RCX: 0000000000040000
RDX: ffffc9000afc9000 RSI: 000000000003ffff RDI: ffffffff9208b29c
RBP: 0000000000000c00 R08: 0000000000000013 R09: 1ffffffff1d334ad
R10: dffffc0000000000 R11: fffffbfff1d334ae R12: ffffffff9208b240
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000001
FS: 00007f5c59bd86c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c000091000 CR3: 00000000207e3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
bio_alloc include/linux/bio.h:432 [inline]
submit_bh_wbc+0x27b/0x530 fs/buffer.c:2807
flush_commit_list+0xa64/0x1bf0 fs/reiserfs/journal.c:1057
flush_journal_list+0x2a8/0x1c70 fs/reiserfs/journal.c:1391
flush_used_journal_lists+0x1256/0x15d0 fs/reiserfs/journal.c:1829
do_journal_end+0x39f7/0x4770
do_journal_begin_r+0x970/0x1020
journal_begin+0x14c/0x360 fs/reiserfs/journal.c:3260
reiserfs_sync_fs+0xb0/0x150 fs/reiserfs/super.c:77
dquot_quota_sync+0xdb/0x490 fs/quota/dquot.c:753
iterate_supers+0xc2/0x180 fs/super.c:968
quota_sync_all fs/quota/quota.c:69 [inline]
__do_sys_quotactl fs/quota/quota.c:938 [inline]
__se_sys_quotactl+0x391/0xa30 fs/quota/quota.c:917
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: 0033:0x7f5c58e7cae9
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:00007f5c59bd80c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f5c58f9bf80 RCX: 00007f5c58e7cae9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f5c58ec847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f5c58f9bf80 R15: 00007fff8afb9f18