INFO: task syz-executor.3:16884 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:25712 pid:16884 tgid:16883 ppid:5092 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
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1192/0x1b80 fs/fuse/dev.c:513
fuse_lookup_name+0x332/0x830 fs/fuse/dir.c:386
fuse_lookup+0x182/0x600 fs/fuse/dir.c:425
fuse_atomic_open+0x19e/0x8a0 fs/fuse/dir.c:731
atomic_open fs/namei.c:3359 [inline]
lookup_open fs/namei.c:3467 [inline]
open_last_lookups fs/namei.c:3565 [inline]
path_openat+0xe5f/0x31e0 fs/namei.c:3795
do_filp_open+0x234/0x490 fs/namei.c:3825
do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_open fs/open.c:1427 [inline]
__se_sys_open fs/open.c:1423 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1423
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: 0033:0x7f833ac7cda9
RSP: 002b:00007f833b9330c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f833adabf80 RCX: 00007f833ac7cda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020004280
RBP: 00007f833acc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f833adabf80 R15: 00007ffe58481358
INFO: task syz-executor.3:16886 blocked for more than 144 seconds.
Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27856 pid:16886 tgid:16883 ppid:5092 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
d_wait_lookup fs/dcache.c:2449 [inline]
d_alloc_parallel+0xc1a/0x1600 fs/dcache.c:2531
lookup_open fs/namei.c:3421 [inline]
open_last_lookups fs/namei.c:3565 [inline]
path_openat+0x913/0x31e0 fs/namei.c:3795
do_filp_open+0x234/0x490 fs/namei.c:3825
do_sys_openat2+0x13e/0x1d0 fs/open.c:1404
do_sys_open fs/open.c:1419 [inline]
__do_sys_open fs/open.c:1427 [inline]
__se_sys_open fs/open.c:1423 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1423
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: 0033:0x7f833ac7cda9
RSP: 002b:00007f833b9120c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f833adac050 RCX: 00007f833ac7cda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020004280
RBP: 00007f833acc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f833adac050 R15: 00007ffe58481358
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:8/2421:
2 locks held by getty/4808:
#0: ffff88802a19e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-fuzzer/5090:
2 locks held by syz-executor.3/16884:
#0: ffff88807a1bbe10 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88807a1bbe10 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: open_last_lookups fs/namei.c:3564 [inline]
#0: ffff88807a1bbe10 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: path_openat+0x7b3/0x31e0 fs/namei.c:3795
#1: ffff88807a1bc288 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xd3/0x120 fs/fuse/inode.c:544
1 lock held by syz-executor.3/16886:
#0: ffff88807a1bbe10 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88807a1bbe10 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: open_last_lookups fs/namei.c:3564 [inline]
#0: ffff88807a1bbe10 (&type->i_mutex_dir_key#18){++++}-{3:3}, at: path_openat+0x7b3/0x31e0 fs/namei.c:3795
1 lock held by syz-executor.1/18884:
#0: ffff8880907e4420 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write_file+0x61/0x200 fs/namespace.c:453
2 locks held by syz-executor.2/18940:
4 locks held by syz-executor.4/18944:
#0: ffff88802d5f8ac8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
#1: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#1: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#1: ffffffff8d92f120 (rcu_read_lock){....}-{1:2}, at: __pte_offset_map+0x82/0x380 mm/pgtable-generic.c:285
#2: ffff8880b983c0d8 (&pool->lock){-.-.}-{2:2}, at: __queue_work+0x71f/0x1000
#3: ffff88801e28e338 (&p->pi_lock){-.-.}-{2:2}, at: class_raw_spinlock_irqsave_constructor include/linux/spinlock.h:553 [inline]
#3: ffff88801e28e338 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xaf/0x1460 kernel/sched/core.c:4253
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #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: 18940 Comm: syz-executor.2 Not tainted 6.8.0-rc1-syzkaller-00385-g4854cf9c61d0 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:207
Code: a0 c0 74 7e 65 8b 15 a1 c0 74 7e f7 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
RSP: 0018:ffffc9001f21f7b8 EFLAGS: 00000246
RAX: ffffffff81cc70f4 RBX: 0000000000000cc0 RCX: ffff888028b79dc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9001f21f8b0 R08: ffffffff81cc705f R09: 1ffffffff1e0489d
R10: dffffc0000000000 R11: fffffbfff1e0489e R12: ffffea0001349900
R13: 1ffff92003e43f08 R14: ffff88802c199bc0 R15: 0000000000000000
FS: 00007f62f8bc46c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056276eb8bea8 CR3: 00000000895aa000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
shmem_alloc_and_add_folio+0x434/0xde0 mm/shmem.c:1678
shmem_get_folio_gfp+0x7c3/0x1ee0 mm/shmem.c:2052
shmem_get_folio mm/shmem.c:2134 [inline]
shmem_write_begin+0x170/0x4c0 mm/shmem.c:2717
generic_perform_write+0x31b/0x630 mm/filemap.c:3930
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2893
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa74/0xca0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
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: 0033:0x7f62f7e7baef
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f62f8bc3e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f62f7e7baef
RDX: 0000000001000000 RSI: 00007f62ee200000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000559b
R10: 0000000020005b02 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f62f8bc3f80 R14: 00007f62f8bc3f40 R15: 00007f62ee200000