* [syzbot] [kernel?] INFO: task hung in nsim_bus_dev_del
@ 2026-05-16 0:11 syzbot
2026-05-16 11:04 ` Hillf Danton
0 siblings, 1 reply; 3+ messages in thread
From: syzbot @ 2026-05-16 0:11 UTC (permalink / raw)
To: dakr, driver-core, gregkh, linux-kernel, rafael, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 5cbb61bf4168 arm64/fpsimd: ptrace: zero target's fpsimd_st..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
console output: https://syzkaller.appspot.com/x/log.txt?x=165db76c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=a834c6344141a58b
dashboard link: https://syzkaller.appspot.com/bug?extid=1cf303af03cf30b1275a
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
userspace arch: arm64
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c4d56a580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115db76c580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/04156ec16593/disk-5cbb61bf.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/6bfa041e2c79/vmlinux-5cbb61bf.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a92d82d8a79e/Image-5cbb61bf.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1cf303af03cf30b1275a@syzkaller.appspotmail.com
INFO: task syz-executor:4797 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4797 tgid:4797 ppid:4796 task_flags:0x400140 flags:0x00800000
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
device_lock include/linux/device.h:1040 [inline]
device_del+0xa0/0x710 drivers/base/core.c:3857
device_unregister+0x2c/0xf0 drivers/base/core.c:3936
nsim_bus_dev_del+0x60/0x88 drivers/net/netdevsim/bus.c:491
del_device_store+0x248/0x2d0 drivers/net/netdevsim/bus.c:244
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor:4805 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4805 tgid:4805 ppid:4801 task_flags:0x400140 flags:0x00800000
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor:4809 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4809 tgid:4809 ppid:1 task_flags:0x400140 flags:0x00800001
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
INFO: task syz-executor:4812 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:0 pid:4812 tgid:4812 ppid:1 task_flags:0x400140 flags:0x00800001
Call trace:
__switch_to+0x2b0/0x6e0 arch/arm64/kernel/process.c:810 (T)
context_switch kernel/sched/core.c:5387 [inline]
__schedule+0x1b74/0x2d24 kernel/sched/core.c:7188
__schedule_loop kernel/sched/core.c:7267 [inline]
schedule+0xa4/0x140 kernel/sched/core.c:7282
schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7339
__mutex_lock_common+0x98c/0x20f4 kernel/locking/mutex.c:726
__mutex_lock kernel/locking/mutex.c:820 [inline]
mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:873
del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
bus_attr_store+0x80/0xa4 drivers/base/bus.c:172
sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:142
kernfs_fop_write_iter+0x264/0x3c0 fs/kernfs/file.c:352
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x52c/0xa14 fs/read_write.c:688
ksys_write+0x12c/0x224 fs/read_write.c:740
__do_sys_write fs/read_write.c:751 [inline]
__se_sys_write fs/read_write.c:748 [inline]
__arm64_sys_write+0x7c/0x90 fs/read_write.c:748
__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49
el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:121
do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:140
el0_svc+0x60/0x25c arch/arm64/kernel/entry-common.c:723
el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:742
el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594
Showing all locks held in the system:
3 locks held by kworker/u8:0/12:
1 lock held by khungtaskd/31:
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: __ll_sc_atomic64_fetch_or arch/arm64/include/asm/atomic_ll_sc.h:-1 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_atomic64_fetch_or arch/arm64/include/asm/atomic.h:86 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic64_fetch_or include/linux/atomic/atomic-arch-fallback.h:3816 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: raw_atomic_long_fetch_or include/linux/atomic/atomic-long.h:1090 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: arch_test_and_set_bit include/asm-generic/bitops/atomic.h:42 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: test_and_set_bit include/asm-generic/bitops/instrumented-atomic.h:72 [inline]
#0: ffff800088ac66e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire+0x0/0x44 kernel/sched/sched.h:3869
8 locks held by kworker/u8:3/40:
4 locks held by pr/ttyAMA-1/41:
3 locks held by kworker/u8:5/1188:
3 locks held by kworker/u8:6/1389:
3 locks held by kworker/u8:7/1910:
1 lock held by klogd/4292:
3 locks held by udevd/4303:
3 locks held by dhcpcd/4359:
2 locks held by getty/4451:
#0: ffff0000d3bfb0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80009228b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x354/0xf84 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:3/4670:
#0: ffff0000c002b540 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
#1: ffff8000966d7be0 (reg_work){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
#2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
5 locks held by syz-executor/4797:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000e8fb8880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
#4: ffff0000d7b8a128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1040 [inline]
#4: ffff0000d7b8a128 (&dev->mutex){....}-{4:4}, at: device_del+0xa0/0x710 drivers/base/core.c:3857
4 locks held by syz-executor/4805:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000eca42080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
4 locks held by syz-executor/4809:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000eca0f880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
4 locks held by syz-executor/4812:
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2724 [inline]
#0: ffff0000d3e0c410 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x240/0xa14 fs/read_write.c:684
#1: ffff0000cd063c80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b4/0x3c0 fs/kernfs/file.c:343
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#2: ffff0000c922fd28 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f4/0x3c0 fs/kernfs/file.c:344
#3: ffff800089383240 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d0 drivers/net/netdevsim/bus.c:234
3 locks held by kworker/u8:11/4904:
#0: ffff0000ce706140 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x640/0x173c kernel/workqueue.c:3276
#1: ffff8000995f7be0 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x6a4/0x173c kernel/workqueue.c:3276
#2: ffff800089b85900 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80
2 locks held by kworker/u8:12/4906:
2 locks held by kworker/u8:13/4908:
2 locks held by syz-executor/4913:
2 locks held by syz-executor/4914:
=============================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [kernel?] INFO: task hung in nsim_bus_dev_del
2026-05-16 0:11 [syzbot] [kernel?] INFO: task hung in nsim_bus_dev_del syzbot
@ 2026-05-16 11:04 ` Hillf Danton
2026-05-16 12:35 ` syzbot
0 siblings, 1 reply; 3+ messages in thread
From: Hillf Danton @ 2026-05-16 11:04 UTC (permalink / raw)
To: syzbot; +Cc: linux-kernel, syzkaller-bugs
> Date: Fri, 15 May 2026 17:11:33 -0700 [thread overview]
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 5cbb61bf4168 arm64/fpsimd: ptrace: zero target's fpsimd_st..
> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> console output: https://syzkaller.appspot.com/x/log.txt?x=165db76c580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=a834c6344141a58b
> dashboard link: https://syzkaller.appspot.com/bug?extid=1cf303af03cf30b1275a
> compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
> userspace arch: arm64
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12c4d56a580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115db76c580000
#syz test
--- x/kernel/workqueue.c
+++ y/kernel/workqueue.c
@@ -2384,6 +2384,10 @@ retry:
work_flags |= WORK_STRUCT_INACTIVE;
insert_work(pwq, work, &pwq->inactive_works, work_flags);
}
+ do {
+ unsigned long data = *work_data_bits(work);
+ BUG_ON(data & WORK_OFFQ_DISABLE_MASK);
+ } while (0);
out:
raw_spin_unlock(&pool->lock);
--
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [syzbot] [kernel?] INFO: task hung in nsim_bus_dev_del
2026-05-16 11:04 ` Hillf Danton
@ 2026-05-16 12:35 ` syzbot
0 siblings, 0 replies; 3+ messages in thread
From: syzbot @ 2026-05-16 12:35 UTC (permalink / raw)
To: hdanton, linux-kernel, syzkaller-bugs
Hello,
syzbot tried to test the proposed patch but the build/boot failed:
can't ssh into the instance
failed to run ["ssh" "-p" "22" "-F" "/dev/null" "-o" "UserKnownHostsFile=/dev/null" "-o" "IdentitiesOnly=yes" "-o" "BatchMode=yes" "-o" "StrictHostKeyChecking=no" "-o" "ConnectTimeout=10" "root@10.128.1.219" "pwd"]: exit status 255
ssh: connect to host 10.128.1.219 port 22: Connection timed out
Pseudo-terminal will not be allocated because stdin is not a terminal.
Warning: Permanently added '[us-central1-ssh-serialport.googleapis.com]:9600' (ECDSA) to the list of known hosts.
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
serialport: Connected to syzkaller.us-central1-f.ci-upstream-gce-arm64-test-job-0 port 1 (session ID: e70122d9217081b58b1e89fac32748d7c58bb332e094bd288395bea51681d062, active connections: 1).
UEFI firmware (version built at 09:00:00 on Jan 10 2025)
EMU Variable FVB Started
EMU Variable invalid PCD sizes
Found PL031 RTC @ 0x9010000
InitializeRealTimeClock: using default timezone/daylight settings
^[[2J^[[01;01H^[[=3h^[[2J^[[01;01H^[[2J^[[01;01H^[[=3h^[[2J^[[01;01HBdsDxe: loading Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
BdsDxe: starting Boot0001 "UEFI Misc Device" from PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
UEFI: Attempting to start image.
Description: UEFI Misc Device
FilePath: PciRoot(0x0)/Pci(0x2,0x0)/NVMe(0x1,00-00-00-00-00-00-00-00)
OptionNumber: 1.
Booting `syzkaller'
syzkaller build log:
go env (err=<nil>)
AR='ar'
CC='gcc'
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_ENABLED='1'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
CXX='g++'
GCCGO='gccgo'
GO111MODULE='auto'
GOAMD64='v1'
GOARCH='amd64'
GOAUTH='netrc'
GOBIN=''
GOCACHE='/syzkaller/.cache/go-build'
GOCACHEPROG=''
GODEBUG=''
GOENV='/syzkaller/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFIPS140='off'
GOFLAGS=''
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build976075348=/tmp/go-build -gno-record-gcc-switches'
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMOD='/syzkaller/jobs/linux/gopath/src/github.com/google/syzkaller/go.mod'
GOMODCACHE='/syzkaller/jobs/linux/gopath/pkg/mod'
GONOPROXY=''
GONOSUMDB=''
GOOS='linux'
GOPATH='/syzkaller/jobs/linux/gopath'
GOPRIVATE=''
GOPROXY='https://proxy.golang.org,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTELEMETRY='local'
GOTELEMETRYDIR='/syzkaller/.config/go/telemetry'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.26.0'
GOWORK=''
PKG_CONFIG='pkg-config'
git status (err=<nil>)
HEAD detached at d168f260571
nothing to commit, working tree clean
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
go list -f '{{.Stale}}' -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d168f2605715ec7b7ab6840d636f69c758e424d9 -X github.com/google/syzkaller/prog.gitRevisionDate=20260511-154029" ./sys/syz-sysgen | grep -q false || go install -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d168f2605715ec7b7ab6840d636f69c758e424d9 -X github.com/google/syzkaller/prog.gitRevisionDate=20260511-154029" ./sys/syz-sysgen
make .descriptions
tput: No value for $TERM and no -T specified
tput: No value for $TERM and no -T specified
Makefile:31: run command via tools/syz-env for best compatibility, see:
Makefile:32: https://github.com/google/syzkaller/blob/master/docs/contributing.md#using-syz-env
bin/syz-sysgen
touch .descriptions
GOOS=linux GOARCH=arm64 go build -ldflags="-s -w -X github.com/google/syzkaller/prog.GitRevision=d168f2605715ec7b7ab6840d636f69c758e424d9 -X github.com/google/syzkaller/prog.gitRevisionDate=20260511-154029" -o ./bin/linux_arm64/syz-execprog github.com/google/syzkaller/tools/syz-execprog
mkdir -p ./bin/linux_arm64
aarch64-linux-gnu-g++ -o ./bin/linux_arm64/syz-executor executor/executor.cc \
-O2 -pthread -Wall -Werror -Wparentheses -Wunused-const-variable -Wframe-larger-than=16384 -Wno-stringop-overflow -Wno-array-bounds -Wno-format-overflow -Wno-unused-but-set-variable -Wno-unused-command-line-argument -static-pie -std=c++17 -I. -Iexecutor/_include -DGOOS_linux=1 -DGOARCH_arm64=1 \
-DHOSTGOOS_linux=1 -DGIT_REVISION=\"d168f2605715ec7b7ab6840d636f69c758e424d9\"
/usr/lib/gcc-cross/aarch64-linux-gnu/14/../../../../aarch64-linux-gnu/bin/ld: /tmp/ccXJzoBr.o: in function `Connection::Connect(char const*, char const*)':
executor.cc:(.text._ZN10Connection7ConnectEPKcS1_[_ZN10Connection7ConnectEPKcS1_]+0x2ec): warning: Using 'gethostbyname' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
./tools/check-syzos.sh 2>/dev/null
Tested on:
commit: 5cbb61bf arm64/fpsimd: ptrace: zero target's fpsimd_st..
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
kernel config: https://syzkaller.appspot.com/x/.config?x=a834c6344141a58b
dashboard link: https://syzkaller.appspot.com/bug?extid=1cf303af03cf30b1275a
compiler: Debian clang version 21.1.8 (++20251221033036+2078da43e25a-1~exp1~20251221153213.50), Debian LLD 21.1.8
userspace arch: arm64
patch: https://syzkaller.appspot.com/x/patch.diff?x=132e9bce580000
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2026-05-16 12:35 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-05-16 0:11 [syzbot] [kernel?] INFO: task hung in nsim_bus_dev_del syzbot
2026-05-16 11:04 ` Hillf Danton
2026-05-16 12:35 ` syzbot
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