INFO: task syz-executor.4:18302 blocked for more than 143 seconds.
Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:25656 pid:18302 tgid:18295 ppid:5110 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1960/0x4a80 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_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x703/0xa40 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:812 [inline]
dir_relax_shared include/linux/fs.h:3437 [inline]
ext4_readdir+0x1d55/0x37e0 fs/ext4/dir.c:302
iterate_dir+0x1cd/0x540 fs/readdir.c:106
__do_sys_getdents fs/readdir.c:322 [inline]
__se_sys_getdents+0x1ef/0x4c0 fs/readdir.c:307
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x44/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa89c07cae9
RSP: 002b:00007fa89cd1e0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000004e
RAX: ffffffffffffffda RBX: 00007fa89c19c050 RCX: 00007fa89c07cae9
RDX: 00000000000000c2 RSI: 00000000200049c0 RDI: 0000000000000007
RBP: 00007fa89c0c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fa89c19c050 R15: 00007fff7f3dd1c8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92d360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92d360 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92d360 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6613
2 locks held by getty/4813:
#0: ffff88814c3200a0 (&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
1 lock held by syz-executor.1/5086:
2 locks held by syz-executor.4/18302:
#0: ffff88802736c0c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2b0/0x340 fs/file.c:1177
#1: ffff8880366fac00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#1: ffff8880366fac00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: dir_relax_shared include/linux/fs.h:3437 [inline]
#1: ffff8880366fac00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: ext4_readdir+0x1d55/0x37e0 fs/ext4/dir.c:302
6 locks held by syz-executor.4/18307:
1 lock held by syz-executor.0/19703:
#0: ffff8880b993c358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
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:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 19709 Comm: syz-executor.4 Not tainted 6.6.0-syzkaller-14142-g90b0c2b2edd1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/09/2023
RIP: 0010:__sanitizer_cov_trace_pc+0x42/0x60 kernel/kcov.c:212
Code: c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 fc 15 00 00 00 74 2c 8b 91 d8 15 00 00 83 fa 02 75 21 48 8b 91 e0 15 00 00 <48> 8b 32 48 8d 7e 01 8b 89 dc 15 00 00 48 39 cf 73 08 48 89 3a 48
RSP: 0000:ffffc9000d16fa38 EFLAGS: 00000246
RAX: ffffffff81f66a66 RBX: 0000000000010785 RCX: ffff888025178000
RDX: ffffc9000e43a000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000d16faf0 R08: ffffffff81f669c5 R09: 1ffff1100f5b5a71
R10: dffffc0000000000 R11: ffffed100f5b5a72 R12: 0000000000000000
R13: ffff88801771eff8 R14: 8000000010785225 R15: 1ffff92001a2df4c
FS: 00007fdff40466c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdfe99ff000 CR3: 0000000018b79000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
_static_cpu_has arch/x86/include/asm/cpufeature.h:171 [inline]
pte_shstk arch/x86/include/asm/pgtable.h:135 [inline]
pte_write arch/x86/include/asm/pgtable.h:178 [inline]
__page_table_check_ptes_set+0x276/0x280 mm/page_table_check.c:196
page_table_check_ptes_set include/linux/page_table_check.h:74 [inline]
set_ptes include/linux/pgtable.h:234 [inline]
do_anonymous_page mm/memory.c:4217 [inline]
do_pte_missing mm/memory.c:3728 [inline]
handle_pte_fault mm/memory.c:5038 [inline]
__handle_mm_fault mm/memory.c:5179 [inline]
handle_mm_fault+0x62be/0x6650 mm/memory.c:5344
do_user_addr_fault arch/x86/mm/fault.c:1413 [inline]
handle_page_fault arch/x86/mm/fault.c:1505 [inline]
exc_page_fault+0x2ac/0x860 arch/x86/mm/fault.c:1561
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fdff32286e6
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007fdff4045520 EFLAGS: 00010246
RAX: 0000000000000001 RBX: 00007fdff40455c0 RCX: 0000000000000101
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007fdff4045660
RBP: 0000000000000102 R08: 00007fdfe99ff000 R09: 0000000000000000
R10: 0000000000000000 R11: 00007fdff40455d0 R12: 0000000000000001
R13: 00007fdff32ea520 R14: 0000000000000000 R15: 00007fdff4045660