INFO: task syz.6.1780:18981 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1780 state:D stack:27048 pid:18981 tgid:18977 ppid:11159 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7339
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
__rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
__rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
inode_lock_nested include/linux/fs.h:914 [inline]
filename_create+0x1f8/0x3c0 fs/namei.c:4139
do_symlinkat+0xbc/0x3f0 fs/namei.c:4749
__do_sys_symlink fs/namei.c:4777 [inline]
__se_sys_symlink fs/namei.c:4775 [inline]
__x64_sys_symlink+0x7a/0x90 fs/namei.c:4775
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f46570bebe9
RSP: 002b:00007f4655305038 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f46572e6090 RCX: 00007f46570bebe9
RDX: 0000000000000000 RSI: 0000200000000800 RDI: 0000200000000540
RBP: 00007f4657141e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f46572e6128 R14: 00007f46572e6090 R15: 00007fff5c0772e8
INFO: task syz.6.1780:18984 blocked for more than 143 seconds.
Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1780 state:D stack:29352 pid:18984 tgid:18977 ppid:11159 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x16f3/0x4c20 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
rt_mutex_schedule+0x77/0xf0 kernel/sched/core.c:7339
rt_mutex_slowlock_block kernel/locking/rtmutex.c:1647 [inline]
__rt_mutex_slowlock kernel/locking/rtmutex.c:1721 [inline]
__rt_mutex_slowlock_locked+0x1e04/0x25e0 kernel/locking/rtmutex.c:1760
rt_mutex_slowlock+0xb5/0x160 kernel/locking/rtmutex.c:1800
__rt_mutex_lock kernel/locking/rtmutex.c:1815 [inline]
rwbase_write_lock+0x14f/0x750 kernel/locking/rwbase_rt.c:244
inode_lock_nested include/linux/fs.h:914 [inline]
lock_rename fs/namei.c:3272 [inline]
do_renameat2+0x3b9/0xa80 fs/namei.c:5224
__do_sys_rename fs/namei.c:5325 [inline]
__se_sys_rename fs/namei.c:5323 [inline]
__x64_sys_rename+0x82/0x90 fs/namei.c:5323
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f46570bebe9
RSP: 002b:00007f46552e4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 00007f46572e6180 RCX: 00007f46570bebe9
RDX: 0000000000000000 RSI: 0000200000000180 RDI: 00002000000003c0
RBP: 00007f4657141e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f46572e6218 R14: 00007f46572e6180 R15: 00007fff5c0772e8
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
watchdog+0xf93/0xfe0 kernel/hung_task.c:491
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 21951 Comm: syz.3.2065 Tainted: G W 6.17.0-rc1-syzkaller-00224-g8d561baae505 #0 PREEMPT_{RT,(full)}
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:23 [inline]
RIP: 0010:raw_atomic_read include/linux/atomic/atomic-arch-fallback.h:457 [inline]
RIP: 0010:num_online_cpus include/linux/cpumask.h:1196 [inline]
RIP: 0010:memcg_vmstats_needs_flush mm/memcontrol.c:560 [inline]
RIP: 0010:memcg_rstat_updated+0x111/0x220 mm/memcontrol.c:582
Code: 00 00 e8 12 e0 fc ff 4c 89 f8 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 c5 00 00 00 41 8b 2f 48 8b 44 24 08 42 0f b6 04 20 84 c0 <4d> 89 e7 0f 85 cb 00 00 00 8b 05 68 8b fc 0c c1 e0 06 39 c5 0f 87
RSP: 0000:ffffc90006737ba8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8881268c5000 RCX: ffffffff8220b0be
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88802cdfb5e8
RBP: 0000000000000082 R08: ffff88802cdfb5eb R09: 1ffff110059bf6bd
R10: dffffc0000000000 R11: ffffed10059bf6be R12: dffffc0000000000
R13: 0000607ed93b6e00 R14: 1ffffd1ffff8f7c2 R15: ffff88802cdfb5e8
FS: 00007ff2dc07e6c0(0000) GS:ffff8881268c5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2d453d000 CR3: 00000000a0d52000 CR4: 00000000003526f0
Call Trace:
count_memcg_events+0xbd/0x270 mm/memcontrol.c:845
count_memcg_events_mm include/linux/memcontrol.h:980 [inline]
count_memcg_event_mm+0x14c/0x260 include/linux/memcontrol.h:987
mm_account_fault mm/memory.c:6229 [inline]
handle_mm_fault+0x2fd8/0x3400 mm/memory.c:6390
do_user_addr_fault+0xa81/0x1390 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7ff2ddce0c46
Code: f0 72 6e 48 63 cd 48 01 c1 49 39 4f 08 72 4c 8d 4d ff 85 ed 74 33 66 0f 1f 44 00 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007ff2dc07d4a0 EFLAGS: 00010206
RAX: 00000000008df001 RBX: 00007ff2dc07d540 RCX: 0000000000000042
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ff2dc07d5e0
RBP: 0000000000000102 R08: 00007ff2d3c5e000 R09: 00000000008df000
R10: 0000000000000000 R11: 00007ff2dc07d550 R12: 0000000000000001
R13: 00007ff2ddebd980 R14: 0000000000000000 R15: 00007ff2dc07d5e0