INFO: task syz-executor.4:5099 blocked for more than 143 seconds.
Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:20400 pid:5099 tgid:5099 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
rwsem_down_write_slowpath+0xeea/0x13b0 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:516
cleanup_mnt+0x426/0x4c0 fs/namespace.c:1256
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+0xb1/0x150 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x69/0x2a0 kernel/entry/common.c:296
do_syscall_64+0x52/0x110 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fd5e267df17
RSP: 002b:00007ffee80c1648 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd5e267df17
RDX: 0000000000000000 RSI: 000000000000000a RDI: 00007ffee80c1700
RBP: 00007ffee80c1700 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffee80c27c0
R13: 00007fd5e26c73b9 R14: 00000000002ee424 R15: 0000000000000004
INFO: task syz-executor.5:19238 blocked for more than 143 seconds.
Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:23960 pid:19238 tgid:19222 ppid:5101 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
jfs_flush_journal+0x72b/0xec0 fs/jfs/jfs_logmgr.c:1564
jfs_sync_fs+0x80/0xa0 fs/jfs/super.c:684
iterate_supers+0xc2/0x180 fs/super.c:971
ksys_sync+0xdb/0x1c0 fs/sync.c:104
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fca86a7cbe9
RSP: 002b:00007fca855bc0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fca86b9c120 RCX: 00007fca86a7cbe9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fca86ac847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fca86b9c120 R15: 00007ffe6c2ad0c8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4811:
#0: ffff88802635d0a0 (&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.4/5099:
#0: ffff8880376a40e0 (&type->s_umount_key#69){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880376a40e0 (&type->s_umount_key#69){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880376a40e0 (&type->s_umount_key#69){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:516
2 locks held by kworker/u4:14/5950:
#0: ffff8880b983c358 (&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:988
3 locks held by kworker/u4:5/12355:
#0: ffff8880b983c358 (&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:988
#2: ffff8880b9829718 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x120/0x260 kernel/time/timer.c:999
1 lock held by syz-executor.5/19238:
#0: ffff8880376a40e0 (&type->s_umount_key#69){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880376a40e0 (&type->s_umount_key#69){++++}-{3:3}, at: super_lock+0x176/0x3a0 fs/super.c:117
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4498 Comm: klogd Not tainted 6.7.0-rc6-syzkaller-00022-g55cb5f43689d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:unwind_get_return_address+0x4b/0xc0 arch/x86/kernel/unwind_orc.c:369
Code: e8 03 42 0f b6 04 30 84 c0 75 6e 8b 2b 31 ff 89 ee e8 59 be 50 00 85 ed 74 4a 48 83 c3 48 49 89 df 49 c1 ef 03 43 80 3c 37 00 <74> 08 48 89 df e8 9b bf ac 00 48 8b 3b e8 13 e2 1f 00 89 c5 31 ff
RSP: 0018:ffffc90003167338 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900031673a8 RCX: ffff88807c6a1dc0
RDX: ffff88807c6a1dc0 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffffffff813dacb7 R09: ffffffff813dc790
R10: 0000000000000003 R11: ffff88807c6a1dc0 R12: ffff88807c6a1dc0
R13: ffffffff817bd6b0 R14: dffffc0000000000 R15: 1ffff9200062ce75
FS: 00007f0c4c2ca380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555af73b8680 CR3: 000000002794e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x11f/0x1a0 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:198 [inline]
__do_kmalloc_node mm/slab_common.c:1007 [inline]
__kmalloc_node_track_caller+0xb1/0x190 mm/slab_common.c:1027
kmalloc_reserve+0xf3/0x260 net/core/skbuff.c:582
__alloc_skb+0x1b1/0x420 net/core/skbuff.c:651
alloc_skb include/linux/skbuff.h:1286 [inline]
alloc_skb_with_frags+0xc3/0x780 net/core/skbuff.c:6332
sock_alloc_send_pskb+0x919/0xa50 net/core/sock.c:2780
unix_dgram_sendmsg+0x696/0x2200 net/unix/af_unix.c:1974
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg net/socket.c:745 [inline]
__sys_sendto+0x484/0x640 net/socket.c:2190
__do_sys_sendto net/socket.c:2202 [inline]
__se_sys_sendto net/socket.c:2198 [inline]
__x64_sys_sendto+0xde/0xf0 net/socket.c:2198
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f0c4c42c9b5
Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffdebf5fda8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f0c4c42c9b5
RDX: 0000000000000047 RSI: 000055b08dd51bf0 RDI: 0000000000000003
RBP: 000055b08dd49910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013
R13: 00007f0c4c5ba212 R14: 00007ffdebf5fea8 R15: 0000000000000000