INFO: task syz-executor.3:13844 blocked for more than 144 seconds.
Not tainted 6.9.0-syzkaller-01768-ga5131c3fdf26 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27152 pid:13844 tgid:13835 ppid:6495 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:801 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2469 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2493
filename_lookup+0x1e5/0x5b0 fs/namei.c:2522
user_path_at_empty+0x42/0x60 fs/namei.c:2929
user_path_at include/linux/namei.h:58 [inline]
do_mount fs/namespace.c:3689 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x1ff/0x320 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb92b87dd69
RSP: 002b:00007fb92c63c0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb92b9ac1f0 RCX: 00007fb92b87dd69
RDX: 00000000200002c0 RSI: 0000000020000200 RDI: 0000000000000000
RBP: 00007fb92b8ca49e R08: 0000000020000400 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fb92b9ac1f0 R15: 00007ffdaf851ab8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8d9b1b20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d9b1b20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d9b1b20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
3 locks held by kworker/u8:7/2416:
2 locks held by getty/4833:
#0: ffff88802aa0b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-executor.3/13843:
1 lock held by syz-executor.3/13844:
#0: ffff88805f9d4188 (&type->i_mutex_dir_key#21){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:801 [inline]
#0: ffff88805f9d4188 (&type->i_mutex_dir_key#21){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88805f9d4188 (&type->i_mutex_dir_key#21){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.2/15157:
1 lock held by syz-executor.3/15273:
#0: ffffffff8d9bd180 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4448
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 30 Comm: khungtaskd Not tainted 6.9.0-syzkaller-01768-ga5131c3fdf26 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 13843 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-01768-ga5131c3fdf26 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline]
RIP: 0010:unwind_next_frame+0x1bd6/0x23a0 arch/x86/kernel/unwind_orc.c:648
Code: ff e8 be c5 50 00 4c 89 e7 e8 76 d8 ff ff 48 8d 7b 40 48 89 fa 49 89 c4 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 84 13 f5 ff ff e8 ef 11 ac 00 e9 09 f5 ff ff e8 85 c5 50 00 49
RSP: 0018:ffffc900032ee4f0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc900032ee570 RCX: ffffc9000ecc1000
RDX: 1ffff9200065dcb6 RSI: ffffffff813d0af9 RDI: ffffc900032ee5b0
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffff88813fffa000
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
FS: 00007fb92c65d6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e630000 CR3: 0000000066d90000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object mm/kasan/common.c:240 [inline]
__kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2121 [inline]
slab_free mm/slub.c:4353 [inline]
kmem_cache_free+0x12e/0x390 mm/slub.c:4417
free_buffer_head+0x4e/0x110 fs/buffer.c:3017
try_to_free_buffers+0x1c5/0x2d0 fs/buffer.c:2958
filemap_release_folio+0x215/0x280 mm/filemap.c:4133
shrink_folio_list+0x295a/0x3f00 mm/vmscan.c:1376
evict_folios+0x6e6/0x1bb0 mm/vmscan.c:4537
try_to_shrink_lruvec+0x618/0x9b0 mm/vmscan.c:4733
lru_gen_shrink_lruvec mm/vmscan.c:4876 [inline]
shrink_lruvec+0x2df/0x29b0 mm/vmscan.c:5653
shrink_node_memcgs mm/vmscan.c:5873 [inline]
shrink_node+0x81e/0x3a80 mm/vmscan.c:5908
shrink_zones mm/vmscan.c:6152 [inline]
do_try_to_free_pages+0x361/0x1a20 mm/vmscan.c:6214
try_to_free_mem_cgroup_pages+0x317/0x7f0 mm/vmscan.c:6529
try_charge_memcg+0x3d1/0x11a0 mm/memcontrol.c:2783
try_charge mm/memcontrol.c:2931 [inline]
charge_memcg mm/memcontrol.c:7284 [inline]
__mem_cgroup_charge+0xa6/0x140 mm/memcontrol.c:7299
mem_cgroup_charge include/linux/memcontrol.h:691 [inline]
__filemap_add_folio+0x26a/0xe60 mm/filemap.c:864
filemap_add_folio+0xaf/0x1e0 mm/filemap.c:947
do_read_cache_folio+0x1d9/0x540 mm/filemap.c:3714
do_read_cache_page mm/filemap.c:3813 [inline]
read_cache_page+0x5b/0x160 mm/filemap.c:3822
read_mapping_page include/linux/pagemap.h:890 [inline]
dir_get_page fs/sysv/dir.c:64 [inline]
sysv_find_entry+0x1e5/0x690 fs/sysv/dir.c:157
sysv_inode_by_name+0x71/0x3b0 fs/sysv/dir.c:374
sysv_lookup fs/sysv/namei.c:38 [inline]
sysv_lookup+0x8c/0x100 fs/sysv/namei.c:31
lookup_one_qstr_excl+0x11d/0x190 fs/namei.c:1607
filename_create+0x1ed/0x530 fs/namei.c:3901
do_mkdirat+0xab/0x3a0 fs/namei.c:4146
__do_sys_mkdirat fs/namei.c:4169 [inline]
__se_sys_mkdirat fs/namei.c:4167 [inline]
__x64_sys_mkdirat+0x114/0x170 fs/namei.c:4167
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb92b87c867
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 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:00007fb92c65cef8 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fb92c65cf80 RCX: 00007fb92b87c867
RDX: 00000000000001ff RSI: 00000000200000c0 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000200000c0
R13: 00007fb92c65cf40 R14: 0000000000000000 R15: 0000000000000000