INFO: task syz.1.16:482 blocked for more than 122 seconds.
Not tainted 6.16.0-rc6-syzkaller-g347e9f5043c8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.16 state:D stack:0 pid:482 tgid:480 ppid:469 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0xfd2/0x1c60 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe0/0x280 kernel/sched/core.c:6879
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:6936
rwsem_down_read_slowpath+0x528/0xb10 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x56/0x100 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:884 [inline]
lookup_slow+0x4a/0x80 fs/namei.c:1833
walk_component+0x30b/0x450 fs/namei.c:2138
lookup_last fs/namei.c:2639 [inline]
path_lookupat+0x17a/0x490 fs/namei.c:2663
filename_lookup+0x212/0x580 fs/namei.c:2692
user_path_at+0x42/0x60 fs/namei.c:3136
do_mount fs/namespace.c:4236 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x309/0x490 fs/namespace.c:4427
__x64_sys_mount+0xc3/0xf0 fs/namespace.c:4427
x64_sys_call+0xd52/0x2f80 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x62/0x160 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fa38c58e929
RSP: 002b:00007fa38d3c4038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fa38c7b6080 RCX: 00007fa38c58e929
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007fa38c610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fa38c7b6080 R15: 00007ffcc5f0bdd8
INFO: task syz.2.17:498 blocked for more than 123 seconds.
Not tainted 6.16.0-rc6-syzkaller-g347e9f5043c8 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17 state:D stack:0 pid:498 tgid:494 ppid:484 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0xfd2/0x1c60 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0xe0/0x280 kernel/sched/core.c:6879
schedule_preempt_disabled+0x14/0x30 kernel/sched/core.c:6936
rwsem_down_read_slowpath+0x528/0xb10 kernel/locking/rwsem.c:1084
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x56/0x100 kernel/locking/rwsem.c:1526
inode_lock_shared include/linux/fs.h:884 [inline]
lookup_slow+0x4a/0x80 fs/namei.c:1833
walk_component+0x30b/0x450 fs/namei.c:2138
lookup_last fs/namei.c:2639 [inline]
path_lookupat+0x17a/0x490 fs/namei.c:2663
filename_lookup+0x212/0x580 fs/namei.c:2692
user_path_at+0x42/0x60 fs/namei.c:3136
do_mount fs/namespace.c:4236 [inline]
__do_sys_mount fs/namespace.c:4450 [inline]
__se_sys_mount+0x309/0x490 fs/namespace.c:4427
__x64_sys_mount+0xc3/0xf0 fs/namespace.c:4427
x64_sys_call+0xd52/0x2f80 arch/x86/include/generated/asm/syscalls_64.h:166
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x62/0x160 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7feab558e929
RSP: 002b:00007feab6370038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007feab57b6080 RCX: 00007feab558e929
RDX: 0000000000000000 RSI: 0000200000000040 RDI: 0000000000000000
RBP: 00007feab5610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007feab57b6080 R15: 00007ffca2869728
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller-g347e9f5043c8 #0 PREEMPT c1a6221578dcc833db10529ce2d2a78fd234cf40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:94
dump_stack_lvl+0x10b/0x180 lib/dump_stack.c:120
dump_stack+0x19/0x20 lib/dump_stack.c:129
nmi_cpu_backtrace+0x2bd/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0x1043/0x1090 kernel/hung_task.c:470
kthread+0x6f7/0x880 kernel/kthread.c:464
ret_from_fork+0x14a/0x1f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.16.0-rc6-syzkaller-g347e9f5043c8 #0 PREEMPT c1a6221578dcc833db10529ce2d2a78fd234cf40
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc b8 8b eb 6f 7e 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 43 aa 13 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> e9 13 63 02 00 cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000187e00 EFLAGS: 000002c2
RAX: ffff88826e883000 RBX: ffff8881036633c0 RCX: ffffffff8593b0de
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 000000000004396c
RBP: ffffc90000187e00 R08: ffff8881f6f34343 R09: 1ffff1103ede6868
R10: dffffc0000000000 R11: ffffed103ede6869 R12: 1ffff110206cc678
R13: 0000000000000001 R14: 0000000000000000 R15: ffffffff87a6deb0
FS: 0000000000000000(0000) GS:ffff88826e883000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6cdb96ef98 CR3: 00000001242a8000 CR4: 00000000003526b0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x17/0x30 arch/x86/kernel/process.c:749
arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:786
default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
cpuidle_idle_call kernel/sched/idle.c:185 [inline]
do_idle+0x19c/0x470 kernel/sched/idle.c:325
cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:423
start_secondary+0x12a/0x140 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13b/0x157