INFO: task syz-executor167:4278 blocked for more than 143 seconds.
Tainted: G W 6.1.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor167 state:D stack:29016 pid:4278 ppid:4259 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component+0x2d0/0x400 fs/namei.c:1998
lookup_last fs/namei.c:2455 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2479
filename_lookup+0x251/0x600 fs/namei.c:2508
user_path_at_empty+0x3e/0x60 fs/namei.c:2905
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3396 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x296/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37201f2bc9
RSP: 002b:00007f372018e228 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f37202846b8 RCX: 00007f37201f2bc9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f37202846b0 R08: 0000000000000000 R09: 00007f372018e6c0
R10: 0000000000001000 R11: 0000000000000246 R12: 00007f37202846bc
R13: 00007f37202470c0 R14: 0000000400141042 R15: 00007fffae5c6b38
</TASK>
INFO: task syz-executor167:4275 blocked for more than 144 seconds.
Tainted: G W 6.1.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor167 state:D stack:29016 pid:4275 ppid:4258 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component+0x2d0/0x400 fs/namei.c:1998
lookup_last fs/namei.c:2455 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2479
filename_lookup+0x251/0x600 fs/namei.c:2508
user_path_at_empty+0x3e/0x60 fs/namei.c:2905
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3396 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x296/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37201f2bc9
RSP: 002b:00007f372018e228 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f37202846b8 RCX: 00007f37201f2bc9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f37202846b0 R08: 0000000000000000 R09: 00007f372018e6c0
R10: 0000000000001000 R11: 0000000000000246 R12: 00007f37202846bc
R13: 00007f37202470c0 R14: 0000000400141042 R15: 00007fffae5c6b38
</TASK>
INFO: task syz-executor167:4274 blocked for more than 145 seconds.
Tainted: G W 6.1.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor167 state:D stack:28384 pid:4274 ppid:4260 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component+0x2d0/0x400 fs/namei.c:1998
lookup_last fs/namei.c:2455 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2479
filename_lookup+0x251/0x600 fs/namei.c:2508
user_path_at_empty+0x3e/0x60 fs/namei.c:2905
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3396 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x296/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37201f2bc9
RSP: 002b:00007f372018e228 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f37202846b8 RCX: 00007f37201f2bc9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f37202846b0 R08: 0000000000000000 R09: 00007f372018e6c0
R10: 0000000000001000 R11: 0000000000000246 R12: 00007f37202846bc
R13: 00007f37202470c0 R14: 0000000400141042 R15: 00007fffae5c6b38
</TASK>
INFO: task syz-executor167:4277 blocked for more than 145 seconds.
Tainted: G W 6.1.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor167 state:D stack:28672 pid:4277 ppid:4261 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component+0x2d0/0x400 fs/namei.c:1998
lookup_last fs/namei.c:2455 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2479
filename_lookup+0x251/0x600 fs/namei.c:2508
user_path_at_empty+0x3e/0x60 fs/namei.c:2905
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3396 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x296/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37201f2bc9
RSP: 002b:00007f372018e228 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f37202846b8 RCX: 00007f37201f2bc9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f37202846b0 R08: 0000000000000000 R09: 00007f372018e6c0
R10: 0000000000001000 R11: 0000000000000246 R12: 00007f37202846bc
R13: 00007f37202470c0 R14: 0000000400141042 R15: 00007fffae5c6b38
</TASK>
INFO: task syz-executor167:4276 blocked for more than 146 seconds.
Tainted: G W 6.1.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor167 state:D stack:29016 pid:4276 ppid:4262 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5241 [inline]
__schedule+0x143f/0x4570 kernel/sched/core.c:6558
schedule+0xbf/0x180 kernel/sched/core.c:6634
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6693
rwsem_down_read_slowpath kernel/locking/rwsem.c:1094 [inline]
__down_read_common kernel/locking/rwsem.c:1261 [inline]
__down_read kernel/locking/rwsem.c:1274 [inline]
down_read+0x6ff/0xa30 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:768 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1706
walk_component+0x2d0/0x400 fs/namei.c:1998
lookup_last fs/namei.c:2455 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2479
filename_lookup+0x251/0x600 fs/namei.c:2508
user_path_at_empty+0x3e/0x60 fs/namei.c:2905
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3396 [inline]
__do_sys_mount fs/namespace.c:3607 [inline]
__se_sys_mount+0x296/0x3c0 fs/namespace.c:3584
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f37201f2bc9
RSP: 002b:00007f372018e228 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f37202846b8 RCX: 00007f37201f2bc9
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000000
RBP: 00007f37202846b0 R08: 0000000000000000 R09: 00007f372018e6c0
R10: 0000000000001000 R11: 0000000000000246 R12: 00007f37202846bc
R13: 00007f37202470c0 R14: 0000000400141042 R15: 00007fffae5c6b38
</TASK>
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d32b250 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0xde0 kernel/rcu/tasks.h:543
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d32ba70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x34/0xde0 kernel/rcu/tasks.h:543
1 lock held by khungtaskd/27:
#0: ffffffff8d32b080 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8d32b080 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8d32b080 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6510
1 lock held by kswapd0/80:
2 locks held by getty/4001:
#0: ffff888030e07098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000325e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2198
1 lock held by syz-executor167/4264:
1 lock held by syz-executor167/4278:
#0: ffff8880755c5160 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880755c5160 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz-executor167/4268:
1 lock held by syz-executor167/4275:
#0: ffff8880755c4188 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880755c4188 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz-executor167/4272:
1 lock held by syz-executor167/4274:
#0: ffff88806f4a8188 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff88806f4a8188 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz-executor167/4271:
1 lock held by syz-executor167/4277:
#0: ffff8880755c4c18 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880755c4c18 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
1 lock held by syz-executor167/4273:
1 lock held by syz-executor167/4276:
#0: ffff8880755c46d0 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:768 [inline]
#0: ffff8880755c46d0 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1706
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Tainted: G W 6.1.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ae/0x3f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xf88/0xfd0 kernel/hung_task.c:377
kthread+0x28d/0x320 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 80 Comm: kswapd0 Tainted: G W 6.1.121-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:unwind_next_frame+0xdbd/0x2220 arch/x86/kernel/unwind_orc.c:547
Code: 8b 5c 24 68 4c 8b b4 24 90 00 00 00 74 08 48 89 df e8 c7 44 a5 00 48 8b 44 24 08 48 89 03 48 8b 84 24 88 00 00 00 0f b6 04 28 <84> c0 4c 8b 6c 24 38 48 8b 5c 24 50 0f 85 c2 11 00 00 41 c6 06 00
RSP: 0018:ffffc900015e6680 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffc900015e67f8 RCX: 1ffff920002bccf8
RDX: 1ffffffff1e2cd65 RSI: 0000000000000000 RDI: ffffc900015e67b8
RBP: dffffc0000000000 R08: 0000000000000009 R09: ffffc900015e67c0
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc900015e67c0
R13: ffffc900015e67b8 R14: ffffc900015e67f5 R15: 1ffff920002bccf9
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056101a9b5e58 CR3: 0000000019699000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
__unwind_start+0x59d/0x720 arch/x86/kernel/unwind_orc.c:717
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xdb/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:516
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:177 [inline]
slab_free_hook mm/slub.c:1724 [inline]
slab_free_freelist_hook mm/slub.c:1750 [inline]
slab_free mm/slub.c:3661 [inline]
kmem_cache_free+0x292/0x510 mm/slub.c:3683
free_buffer_head+0x45/0xb0 fs/buffer.c:2915
try_to_free_buffers+0x302/0x600 fs/buffer.c:2856
shrink_folio_list+0x288c/0x8f40 mm/vmscan.c:1996
evict_folios+0xaf8/0x25b0 mm/vmscan.c:5039
lru_gen_shrink_lruvec mm/vmscan.c:5222 [inline]
shrink_lruvec+0xdbf/0x4650 mm/vmscan.c:5917
</TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.477 msecs