INFO: task syz-executor.2:16431 blocked for more than 143 seconds.
Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29200 pid:16431 tgid:16429 ppid:15331 flags:0x00000006
Call Trace:
<TASK>
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:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [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: 0033:0x7f586b47dea9
RSP: 002b:00007f586c12b0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f586b5ac050 RCX: 00007f586b47dea9
RDX: 0000000020000100 RSI: 00000000200020c0 RDI: 0000000000000000
RBP: 00007f586b4ca4a4 R08: 0000000020002140 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f586b5ac050 R15: 00007ffe49cd3d28
</TASK>
INFO: task syz-executor.2:16432 blocked for more than 144 seconds.
Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29328 pid:16432 tgid:16429 ppid:15331 flags:0x00000006
Call Trace:
<TASK>
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:805 [inline]
open_last_lookups fs/namei.c:3565 [inline]
path_openat+0x18ce/0x2990 fs/namei.c:3796
do_filp_open+0x1dc/0x430 fs/namei.c:3826
do_sys_openat2+0x17a/0x1e0 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+0x175/0x210 fs/open.c:1432
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: 0033:0x7f586b47dea9
RSP: 002b:00007f586c10a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f586b5ac120 RCX: 00007f586b47dea9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: ffffffffffffff9c
RBP: 00007f586b4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f586b5ac120 R15: 00007ffe49cd3d28
</TASK>
INFO: task syz-executor.2:16436 blocked for more than 145 seconds.
Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29600 pid:16436 tgid:16429 ppid:15331 flags:0x00000006
Call Trace:
<TASK>
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:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
path_listxattr+0x9c/0x160 fs/xattr.c:861
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: 0033:0x7f586b47dea9
RSP: 002b:00007f586afde0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c3
RAX: ffffffffffffffda RBX: 00007f586b5ac2c0 RCX: 00007f586b47dea9
RDX: 000000000000004e RSI: 00000000200002c0 RDI: 0000000020000140
RBP: 00007f586b4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f586b5ac2c0 R15: 00007ffe49cd3d28
</TASK>
INFO: task syz-executor.2:16438 blocked for more than 145 seconds.
Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28672 pid:16438 tgid:16429 ppid:15331 flags:0x00000006
Call Trace:
<TASK>
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_write_slowpath kernel/locking/rwsem.c:1178 [inline]
__down_write_common+0x950/0x13f0 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:830 [inline]
do_unlinkat+0x288/0x750 fs/namei.c:4386
__do_sys_unlink fs/namei.c:4447 [inline]
__se_sys_unlink fs/namei.c:4445 [inline]
__x64_sys_unlink+0xc7/0x110 fs/namei.c:4445
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: 0033:0x7f586b47dea9
RSP: 002b:00007f586afbd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f586b5ac390 RCX: 00007f586b47dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007f586b4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f586b5ac390 R15: 00007ffe49cd3d28
</TASK>
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
4 locks held by kworker/u8:2/34:
2 locks held by getty/4829:
#0: ffff88802ea820a0 (&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
3 locks held by syz-executor.2/16430:
1 lock held by syz-executor.2/16431:
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
1 lock held by syz-executor.2/16432:
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: open_last_lookups fs/namei.c:3565 [inline]
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: path_openat+0x18ce/0x2990 fs/namei.c:3796
1 lock held by syz-executor.2/16436:
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff88807a680188 (&type->i_mutex_dir_key#27){++++}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
2 locks held by syz-executor.2/16438:
#0: ffff888055290420 (sb_writers#44){.+.+}-{0:0}, at: do_unlinkat+0x1d3/0x750 fs/namei.c:4382
#1: ffff88807a680188 (&type->i_mutex_dir_key#27/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88807a680188 (&type->i_mutex_dir_key#27/1){+.+.}-{3:3}, at: do_unlinkat+0x288/0x750 fs/namei.c:4386
1 lock held by syz-executor.4/17020:
1 lock held by syz-executor.0/17966:
#0: ffffffff8ebb70c8 (input_mutex){+.+.}-{3:3}, at: __input_unregister_device+0x136/0x450 drivers/input/input.c:2219
4 locks held by kvm-nx-lpage-re/18045:
#0: ffffffff8d8015c8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#0: ffffffff8d8015c8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_attach_task_all+0x25/0x130 kernel/cgroup/cgroup-v1.c:61
#1: ffffffff8d6545b0 (cpu_hotplug_lock){++++}-{0:0}, at: cgroup_attach_lock+0x12/0x40 kernel/cgroup/cgroup.c:2413
#2: ffffffff8d801390 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock kernel/cgroup/cgroup.c:2415 [inline]
#2: ffffffff8d801390 (cgroup_threadgroup_rwsem){++++}-{0:0}, at: cgroup_attach_lock+0x37/0x40 kernel/cgroup/cgroup.c:2411
#3: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#3: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x403/0x7a0 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.1/18060:
#0: ffffffff8f3014c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f3014c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by syz-executor.1/18063:
#0: ffffffff8f3014c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8f3014c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xe60 net/core/rtnetlink.c:6592
1 lock held by kvm-nx-lpage-re/18062:
#0: ffffffff8d8015c8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_lock include/linux/cgroup.h:368 [inline]
#0: ffffffff8d8015c8 (cgroup_mutex){+.+.}-{3:3}, at: cgroup_attach_task_all+0x25/0x130 kernel/cgroup/cgroup-v1.c:61
2 locks held by syz-executor.4/18067:
#0: ffff8880b953ea58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:559
#1: ffff8880b9528a08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2d9/0x900 kernel/sched/psi.c:988
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
<TASK>
__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
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16430 Comm: syz-executor.2 Not tainted 6.9.0-rc6-syzkaller-00022-g98369dccd2f8 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:26 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0xc/0x60 kernel/kcov.c:207
Code: c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 65 48 8b 15 44 11 76 7e <65> 8b 05 45 11 76 7e a9 00 01 ff 00 48 8b 34 24 74 0f f6 c4 01 74
RSP: 0018:ffffc9000319f040 EFLAGS: 00000212
RAX: 0000000000040000 RBX: ffffc9000319f0c8 RCX: ffffc9000adc2000
RDX: ffff88801e498000 RSI: ffffffff813d288d RDI: ffffc9000319f0d8
RBP: ffffc9000319f530 R08: 0000000000000004 R09: 0000000000000001
R10: 0000000000000001 R11: 0000000000000002 R12: ffffc90003198000
R13: ffffc900031a0000 R14: ffffc9000319f538 R15: 0000000000000001
FS: 00007f586c14c6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32626000 CR3: 000000006a180000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
unwind_next_frame+0x11c7/0x23a0 arch/x86/kernel/unwind_orc.c:665
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
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3798 [inline]
slab_alloc_node mm/slub.c:3845 [inline]
kmem_cache_alloc+0x136/0x320 mm/slub.c:3852
kmem_cache_zalloc include/linux/slab.h:739 [inline]
alloc_buffer_head+0x21/0x160 fs/buffer.c:3001
folio_alloc_buffers+0x2c8/0x7d0 fs/buffer.c:924
create_empty_buffers+0x36/0x480 fs/buffer.c:1650
folio_create_buffers+0x109/0x150 fs/buffer.c:1761
block_read_full_folio+0x20a/0xa70 fs/buffer.c:2365
filemap_read_folio+0xe5/0x2c0 mm/filemap.c:2331
do_read_cache_folio+0x203/0x540 mm/filemap.c:3747
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:888 [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_open.isra.0+0x928/0x13c0 fs/namei.c:3475
open_last_lookups fs/namei.c:3566 [inline]
path_openat+0x92f/0x2990 fs/namei.c:3796
do_filp_open+0x1dc/0x430 fs/namei.c:3826
do_sys_openat2+0x17a/0x1e0 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+0x175/0x210 fs/open.c:1432
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: 0033:0x7f586b47dea9
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:00007f586c14c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f586b5abf80 RCX: 00007f586b47dea9
RDX: 0000000000000040 RSI: 000000002000c380 RDI: ffffffffffffff9c
RBP: 00007f586b4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f586b5abf80 R15: 00007ffe49cd3d28
</TASK>