INFO: task syz.0.16:6704 blocked for more than 143 seconds.
Not tainted 6.17.0-rc1-syzkaller-g99bade344cfa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:29096 pid:6704 tgid:6703 ppid:6400 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_write_slowpath+0x524/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
inode_lock include/linux/fs.h:869 [inline]
blkdev_fallocate+0x24c/0x430 block/fops.c:901
vfs_fallocate+0x5b1/0x10e0 fs/open.c:342
ksys_fallocate fs/open.c:366 [inline]
__do_sys_fallocate fs/open.c:371 [inline]
__se_sys_fallocate fs/open.c:369 [inline]
__x64_sys_fallocate+0xd5/0x150 fs/open.c:369
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8d70b8d169
RSP: 002b:00007f8d71983038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f8d70da5fa0 RCX: 00007f8d70b8d169
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f8d70c0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8d70da5fa0 R15: 00007ffdec353658
INFO: task syz.2.18:6708 blocked for more than 143 seconds.
Not tainted 6.17.0-rc1-syzkaller-g99bade344cfa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.18 state:D stack:29096 pid:6708 tgid:6705 ppid:6401 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_write_slowpath+0x524/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
inode_lock include/linux/fs.h:869 [inline]
blkdev_fallocate+0x24c/0x430 block/fops.c:901
vfs_fallocate+0x5b1/0x10e0 fs/open.c:342
ksys_fallocate fs/open.c:366 [inline]
__do_sys_fallocate fs/open.c:371 [inline]
__se_sys_fallocate fs/open.c:369 [inline]
__x64_sys_fallocate+0xd5/0x150 fs/open.c:369
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2ffc58d169
RSP: 002b:00007f2ffd49b038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f2ffc7a5fa0 RCX: 00007f2ffc58d169
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f2ffc60e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2ffc7a5fa0 R15: 00007ffcc786df68
INFO: task syz.1.17:6720 blocked for more than 143 seconds.
Not tainted 6.17.0-rc1-syzkaller-g99bade344cfa #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.17 state:D stack:29096 pid:6720 tgid:6718 ppid:6398 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5357 [inline]
__schedule+0x1190/0x5de0 kernel/sched/core.c:6961
__schedule_loop kernel/sched/core.c:7043 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:7058
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
rwsem_down_write_slowpath+0x524/0x1310 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1d6/0x200 kernel/locking/rwsem.c:1591
inode_lock include/linux/fs.h:869 [inline]
blkdev_fallocate+0x24c/0x430 block/fops.c:901
vfs_fallocate+0x5b1/0x10e0 fs/open.c:342
ksys_fallocate fs/open.c:366 [inline]
__do_sys_fallocate fs/open.c:371 [inline]
__se_sys_fallocate fs/open.c:369 [inline]
__x64_sys_fallocate+0xd5/0x150 fs/open.c:369
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8d7178d169
RSP: 002b:00007f8d726a1038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f8d719a5fa0 RCX: 00007f8d7178d169
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f8d7180e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000100001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8d719a5fa0 R15: 00007fff0b458a88
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-syzkaller-g99bade344cfa #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:328 [inline]
watchdog+0xf0e/0x1260 kernel/hung_task.c:491
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x5d7/0x6f0 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: 7631 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-g99bade344cfa #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x41/0x70 kernel/kcov.c:217
Code: a9 00 01 ff 00 74 1d f6 c4 01 74 43 a9 00 00 0f 00 75 3c a9 00 00 f0 00 75 35 8b 82 3c 16 00 00 85 c0 74 2b 8b 82 18 16 00 00 <83> f8 02 75 20 48 8b 8a 20 16 00 00 8b 92 1c 16 00 00 48 8b 01 48
RSP: 0018:ffffc9000cee6968 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8badfc66 RCX: ffffffff8b900358
RDX: ffff88804155a440 RSI: ffffffff8b9003ac RDI: 0000000000000001
RBP: ffffc9000cee6a10 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000025 R11: 000000000001e188 R12: 0000000000000025
R13: ffffffff8badfc66 R14: ffffc9000cee6a90 R15: dffffc0000000000
FS: 000055555edd9500(0000) GS:ffff8881247bc000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff02aad35c0 CR3: 000000004651a000 CR4: 00000000003526f0
Call Trace:
format_decode+0x17c/0xd40 lib/vsprintf.c:2672
vsnprintf+0x156/0x1160 lib/vsprintf.c:2869
sprintf+0xcc/0x100 lib/vsprintf.c:3089
print_time kernel/printk/printk.c:1381 [inline]
info_print_prefix+0x25a/0x350 kernel/printk/printk.c:1407
record_print_text+0x140/0x400 kernel/printk/printk.c:1456
printk_get_next_message+0x2d1/0x6d0 kernel/printk/printk.c:3024
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x6ea/0xc60 kernel/printk/printk.c:3226
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
dev_vprintk_emit drivers/base/core.c:4914 [inline]
dev_printk_emit+0xfa/0x140 drivers/base/core.c:4925
__netdev_printk+0x1fb/0x500 net/core/dev.c:12586
netdev_info+0xe4/0x120 net/core/dev.c:12641
nsim_udp_tunnel_unset_port+0x25d/0x3c0 drivers/net/netdevsim/udp_tunnels.c:59
udp_tunnel_nic_device_sync_one net/ipv4/udp_tunnel_nic.c:228 [inline]
udp_tunnel_nic_device_sync_by_port net/ipv4/udp_tunnel_nic.c:249 [inline]
__udp_tunnel_nic_device_sync.part.0+0x931/0xe40 net/ipv4/udp_tunnel_nic.c:292
__udp_tunnel_nic_device_sync net/ipv4/udp_tunnel_nic.c:286 [inline]
udp_tunnel_nic_flush+0x2c3/0x610 net/ipv4/udp_tunnel_nic.c:694
udp_tunnel_nic_unregister net/ipv4/udp_tunnel_nic.c:901 [inline]
udp_tunnel_nic_netdevice_event+0xb9b/0x1fa0 net/ipv4/udp_tunnel_nic.c:942
notifier_call_chain+0xbc/0x410 kernel/notifier.c:85
call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:2229
call_netdevice_notifiers_extack net/core/dev.c:2267 [inline]
call_netdevice_notifiers net/core/dev.c:2281 [inline]
unregister_netdevice_many_notify+0xf76/0x24c0 net/core/dev.c:12154
unregister_netdevice_many net/core/dev.c:12217 [inline]
unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:12061
unregister_netdevice include/linux/netdevice.h:3385 [inline]
nsim_destroy+0x198/0x800 drivers/net/netdevsim/netdev.c:1140
__nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1473
nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1485 [inline]
nsim_dev_reload_destroy+0x10a/0x4d0 drivers/net/netdevsim/dev.c:1707
nsim_drv_remove+0x52/0x1d0 drivers/net/netdevsim/dev.c:1722
device_remove+0xcb/0x170 drivers/base/dd.c:569
__device_release_driver drivers/base/dd.c:1274 [inline]
device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297
bus_remove_device+0x22f/0x420 drivers/base/bus.c:579
device_del+0x396/0x9f0 drivers/base/core.c:3878
device_unregister+0x1d/0xc0 drivers/base/core.c:3919
nsim_bus_dev_del drivers/net/netdevsim/bus.c:483 [inline]
del_device_store+0x355/0x4a0 drivers/net/netdevsim/bus.c:244
bus_attr_store+0x74/0xb0 drivers/base/bus.c:172
sysfs_kf_write+0xef/0x150 fs/sysfs/file.c:145
kernfs_fop_write_iter+0x351/0x510 fs/kernfs/file.c:334
new_sync_write fs/read_write.c:593 [inline]
vfs_write+0x7d3/0x11d0 fs/read_write.c:686
ksys_write+0x12a/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe39e18bc1f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48
RSP: 002b:00007ffdf8598d50 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fe39e18bc1f
RDX: 0000000000000001 RSI: 00007ffdf8598da0 RDI: 0000000000000005
RBP: 00007fe39e20f4fd R08: 0000000000000000 R09: 00007ffdf8598ba7
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffdf8598da0 R14: 00007fe39eed4620 R15: 0000000000000003