INFO: task syz-executor.3:12495 blocked for more than 143 seconds.
Not tainted 6.5.0-rc2-syzkaller-00046-gccff6d117d8d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27144 pid:12495 ppid:5063 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1873/0x48f0 kernel/sched/core.c:6710
schedule+0xc3/0x180 kernel/sched/core.c:6786
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6845
rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
vfs_fsconfig_locked fs/fsopen.c:253 [inline]
__do_sys_fsconfig fs/fsopen.c:439 [inline]
__se_sys_fsconfig+0xa22/0xf70 fs/fsopen.c:314
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: 0033:0x7f9dcc47cb29
RSP: 002b:00007f9dc2ffe0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001af
RAX: ffffffffffffffda RBX: 00007f9dcc59c050 RCX: 00007f9dcc47cb29
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f9dcc4c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9dcc59c050 R15: 00007ffdb68a4968
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8d328af0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8d328eb0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:522
1 lock held by khungtaskd/28:
#0: ffffffff8d328920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4771:
#0: ffff88814abc3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1dc0 drivers/tty/n_tty.c:2187
2 locks held by kworker/u4:1/17729:
#0: ffff888012879138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7e3/0x12c0 kernel/workqueue.c:2569
#1: ffffc90015807d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x82b/0x12c0 kernel/workqueue.c:2571
3 locks held by kworker/0:2H/26378:
#0: ffff8880b983bf98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
#1: ffff8880b98287c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:999
#2: ffffffff8d328920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x5/0x40 include/linux/rcupdate.h:302
5 locks held by syz-executor.3/12487:
#0: ffff888029866470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:437 [inline]
#0: ffff888029866470 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x862/0xf70 fs/fsopen.c:314
#1: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: vfs_fsconfig_locked fs/fsopen.c:253 [inline]
#1: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:439 [inline]
#1: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: __se_sys_fsconfig+0xa22/0xf70 fs/fsopen.c:314
#2: ffffc9000cdb10f0 (&journal->j_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:813 [inline]
#2: ffffc9000cdb10f0 (&journal->j_mutex){+.+.}-{3:3}, at: lock_journal fs/reiserfs/journal.c:534 [inline]
#2: ffffc9000cdb10f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_end+0x399/0x4780 fs/reiserfs/journal.c:4030
#3: ffffc9000cdb1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: reiserfs_mutex_lock_safe fs/reiserfs/reiserfs.h:813 [inline]
#3: ffffc9000cdb1180 (&journal->j_flush_mutex){+.+.}-{3:3}, at: flush_journal_list+0x18d/0x1c70 fs/reiserfs/journal.c:1369
#4: ffff8880b993bf98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
2 locks held by syz-executor.3/12495:
#0: ffff8880610ccc70 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:437 [inline]
#0: ffff8880610ccc70 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x862/0xf70 fs/fsopen.c:314
#1: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: vfs_fsconfig_locked fs/fsopen.c:253 [inline]
#1: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:439 [inline]
#1: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: __se_sys_fsconfig+0xa22/0xf70 fs/fsopen.c:314
5 locks held by syz-executor.2/12669:
2 locks held by syz-executor.2/12694:
#0: ffff888051302870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:437 [inline]
#0: ffff888051302870 (&fc->uapi_mutex){+.+.}-{3:3}, at: __se_sys_fsconfig+0x862/0xf70 fs/fsopen.c:314
#1: ffff88806442a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: vfs_fsconfig_locked fs/fsopen.c:253 [inline]
#1: ffff88806442a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: __do_sys_fsconfig fs/fsopen.c:439 [inline]
#1: ffff88806442a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: __se_sys_fsconfig+0xa22/0xf70 fs/fsopen.c:314
1 lock held by syz-executor.2/13395:
#0: ffff88807e11a0e0 (&type->s_umount_key#111){++++}-{3:3}, at: iterate_supers+0xb0/0x1e0 fs/super.c:742
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.5.0-rc2-syzkaller-00046-gccff6d117d8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Call Trace:
<TASK>
__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+0x187/0x300 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+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x2b8/0x350 kernel/kthread.c:389
ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:296
RIP: 0000:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0000:0000000000000000 EFLAGS: 00000000 ORIG_RAX: 0000000000000000
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4451 Comm: syslogd Not tainted 6.5.0-rc2-syzkaller-00046-gccff6d117d8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
RIP: 0010:raw_atomic64_read include/linux/atomic/atomic-arch-fallback.h:2560 [inline]
RIP: 0010:raw_atomic_long_read include/linux/atomic/atomic-long.h:38 [inline]
RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3161 [inline]
RIP: 0010:__mutex_trylock_common+0xab/0x2e0 kernel/locking/mutex.c:107
Code: 7e 48 89 44 24 18 be 08 00 00 00 e8 5f 1d 7a 00 4c 89 e0 48 c1 e8 03 42 80 3c 30 00 74 08 4c 89 e7 e8 89 1b 7a 00 49 8b 1c 24 <4d> 89 fd 49 c1 ed 03 48 c7 c0 60 92 fa 91 48 c1 e8 03 48 89 44 24
RSP: 0018:ffffc90006d27720 EFLAGS: 00000246
RAX: 1ffff110054caba5 RBX: 0000000000000000 RCX: ffffffff816aa481
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802a655d28
RBP: ffffc90006d277f0 R08: ffff88802a655d2f R09: 1ffff110054caba5
R10: dffffc0000000000 R11: ffffed10054caba6 R12: ffff88802a655d28
R13: dffffc0000000000 R14: dffffc0000000000 R15: ffffc90006d27780
FS: 00007faa422fe380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056282f4f3600 CR3: 000000002d8fd000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
__mutex_trylock kernel/locking/mutex.c:152 [inline]
__mutex_lock_common+0x1f3/0x2530 kernel/locking/mutex.c:606
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x1b/0x20 kernel/locking/mutex.c:799
__unix_dgram_recvmsg+0x251/0x1260 net/unix/af_unix.c:2350
sock_recvmsg_nosec net/socket.c:1020 [inline]
sock_recvmsg net/socket.c:1041 [inline]
sock_read_iter+0x3ab/0x500 net/socket.c:1107
call_read_iter include/linux/fs.h:1865 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x795/0xb00 fs/read_write.c:470
ksys_read+0x1a0/0x2c0 fs/read_write.c:613
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: 0033:0x7faa42452b6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff68f183b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007faa42452b6a
RDX: 00000000000000ff RSI: 000055d99a79a950 RDI: 0000000000000000
RBP: 000055d99a79a910 R08: 0000000000000001 R09: 0000000000000000
R10: 00007faa425f13a3 R11: 0000000000000246 R12: 000055d99a79a982
R13: 000055d99a79a950 R14: 0000000000000000 R15: 00007faa4262fa80
</TASK>