INFO: task syz-executor.1:12373 blocked for more than 143 seconds.
Not tainted 6.9.0-rc7-syzkaller-00136-gf4345f05c0df #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27384 pid:12373 tgid:12370 ppid:12210 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:830 [inline]
lock_rename fs/namei.c:3066 [inline]
do_renameat2+0x62c/0x13f0 fs/namei.c:4972
__do_sys_renameat2 fs/namei.c:5071 [inline]
__se_sys_renameat2 fs/namei.c:5068 [inline]
__x64_sys_renameat2+0xd2/0xf0 fs/namei.c:5068
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf8767dd69
RSP: 002b:00007fbf884570c8 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007fbf877ac120 RCX: 00007fbf8767dd69
RDX: 0000000000000006 RSI: 0000000020000280 RDI: 0000000000000006
RBP: 00007fbf876ca49e R08: 0000000000000005 R09: 0000000000000000
R10: 0000000020000440 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbf877ac120 R15: 00007ffd10062de8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4834:
#0: ffff88807d6380a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.3/5472:
3 locks held by syz-executor.0/7388:
2 locks held by syz-executor.2/7854:
2 locks held by kworker/u8:0/10437:
1 lock held by syz-executor.1/12371:
2 locks held by syz-executor.1/12373:
#0: ffff888033b9e420 (sb_writers#25){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88803e1986d0 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88803e1986d0 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3066 [inline]
#1: ffff88803e1986d0 (&type->i_mutex_dir_key#21/1){+.+.}-{3:3}, at: do_renameat2+0x62c/0x13f0 fs/namei.c:4972
3 locks held by syz-executor.4/13266:
#0: ffff88804cbb00e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88804cbb00e0 (&type->s_umount_key#79){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88804cbb00e0 (&type->s_umount_key#79){++++}-{3:3}, at: deactivate_super+0xb5/0xf0 fs/super.c:504
#1: ffff8880af980278 (&c->state_lock){+.+.}-{3:3}, at: __bch2_fs_stop+0x109/0x550 fs/bcachefs/super.c:621
#2: ffffffff8e33a138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#2: ffffffff8e33a138 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.1/13484:
3 locks held by syz-executor.3/13494:
2 locks held by syz-executor.2/13504:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc7-syzkaller-00136-gf4345f05c0df #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+0x241/0x360 lib/dump_stack.c:114
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/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: 12371 Comm: syz-executor.1 Not tainted 6.9.0-rc7-syzkaller-00136-gf4345f05c0df #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:deref_stack_reg+0x1c7/0x260 arch/x86/kernel/unwind_orc.c:406
Code: 58 48 39 c5 77 53 49 39 c7 76 4e 48 83 c0 08 48 39 e8 76 4c 4c 39 f8 77 47 e8 15 99 54 00 48 8b 2c 24 48 89 ef e8 79 08 00 00 <48> 89 c3 48 8b 6c 24 18 48 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00
RSP: 0018:ffffc90003846aa8 EFLAGS: 00000293
RAX: ffffc90003847668 RBX: ffffc90003846be0 RCX: ffff888022035a00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffffc90003847528
RBP: ffffc90003847528 R08: ffffffff81416d6b R09: ffffffff814158df
R10: 0000000000000003 R11: ffff888022035a00 R12: 1ffff92000708d7d
R13: 1ffff92000708d7e R14: 1ffff92000708d7c R15: ffffc90003848000
FS: 00007fbf884996c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1f8c809000 CR3: 000000004cd1c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x1ab8/0x2a00 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3804 [inline]
slab_alloc_node mm/slub.c:3851 [inline]
kmem_cache_alloc+0x174/0x350 mm/slub.c:3858
kmem_cache_zalloc include/linux/slab.h:739 [inline]
alloc_buffer_head+0x2d/0x2a0 fs/buffer.c:3001
folio_alloc_buffers+0x2da/0x840 fs/buffer.c:924
create_empty_buffers+0x3a/0x740 fs/buffer.c:1650
block_read_full_folio+0x258/0xe10 fs/buffer.c:2365
filemap_read_folio+0x1a0/0x790 mm/filemap.c:2331
do_read_cache_folio+0x134/0x820 mm/filemap.c:3747
do_read_cache_page+0x30/0x200 mm/filemap.c:3813
read_mapping_page include/linux/pagemap.h:888 [inline]
dir_get_page fs/sysv/dir.c:64 [inline]
sysv_find_entry+0x1af/0x410 fs/sysv/dir.c:157
sysv_inode_by_name+0x98/0x1f0 fs/sysv/dir.c:374
sysv_lookup+0x6b/0xe0 fs/sysv/namei.c:38
__lookup_slow+0x28c/0x3f0 fs/namei.c:1692
lookup_slow+0x53/0x70 fs/namei.c:1709
walk_component fs/namei.c:2004 [inline]
link_path_walk+0x9ea/0xea0 fs/namei.c:2331
path_lookupat+0xa9/0x450 fs/namei.c:2484
do_o_path+0x95/0x230 fs/namei.c:3770
path_openat+0x2aa0/0x3240 fs/namei.c:3792
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbf8767dd69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007fbf884990c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fbf877abf80 RCX: 00007fbf8767dd69
RDX: 0000000000200002 RSI: 0000000020000400 RDI: ffffffffffffff9c
RBP: 00007fbf876ca49e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fbf877abf80 R15: 00007ffd10062de8