27-Aug-2026 17:21:03: building syzkaller on f325deb023e4e2fb9197004be1b3da738680429c...
27-Aug-2026 17:21:10: fetching kernel...
27-Aug-2026 17:21:14: checked out kernel commit 4a1eaf96ee5c7ac16b90c84d15c5be505018861a ("Linux 5.15.218", 2026-08-27 14:28:23 +0200 +0200)
27-Aug-2026 17:21:14: cleaning kernel...
27-Aug-2026 17:21:15: building kernel...
27-Aug-2026 17:28:01: kernel built successfully with compiler Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8
27-Aug-2026 17:28:01: testing patch...
27-Aug-2026 17:33:01: aggregating test results failed: Internal error in sys_mount

cgroup: Unknown subsys name 'net'
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4055 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : copy_mount_options fs/namespace.c:3255 [inline]
pc : __do_sys_mount fs/namespace.c:3580 [inline]
pc : __se_sys_mount fs/namespace.c:3562 [inline]
pc : __arm64_sys_mount+0x2f0/0x5f8 fs/namespace.c:3562
lr : copy_mount_options fs/namespace.c:3255 [inline]
lr : __do_sys_mount fs/namespace.c:3580 [inline]
lr : __se_sys_mount fs/namespace.c:3562 [inline]
lr : __arm64_sys_mount+0x2cc/0x5f8 fs/namespace.c:3562
sp : ffff80001f697c80
x29: ffff80001f697d20 x28: 0000000000400100 x27: 00000000fffffff2
x26: 0000000000000f5f x25: 0000000000000000 x24: 0000fffff42f60a1
x23: ffff0000c6618000 x22: 0000fffff42f7000 x21: dfff800000000000
x20: 00000000ffffff5f x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff80000897a880 x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000287402b x12: 0000000097863b1e
x11: ff8080000897a85c x10: 0000ffffffffffff x9 : 0000fffff42f7000
x8 : 0000fffff42f7000 x7 : ffff800008763368 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 copy_mount_options fs/namespace.c:3255 [inline]
 __do_sys_mount fs/namespace.c:3580 [inline]
 __se_sys_mount fs/namespace.c:3562 [inline]
 __arm64_sys_mount+0x2f0/0x5f8 fs/namespace.c:3562
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x28c arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x5c/0x140 arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1d0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) 
---[ end trace 995ad2b6892134ed ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1903fb 	mov	w27, w25
   8:	2a1903e0 	mov	w0, w25
   c:	38400933 	ldtrb	w19, [x9]
* 10:	2a1b03e1 	mov	w1, w27 <-- trapping instruction


Warning: Permanently added '10.128.1.176' (ED25519) to the list of known hosts.
1970/01/01 00:00:28 ignoring optional flag "type"="gce"
1970/01/01 00:00:28 parsed 1 programs
[   28.673980][ T4055] cgroup: Unknown subsys name 'net'
[   28.733042][ T4055] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
[   28.734381][ T4055] Modules linked in:
[   28.735035][ T4055] CPU: 1 PID: 4055 Comm: syz-executor Not tainted syzkaller #0
[   28.736196][ T4055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026
[   28.737772][ T4055] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
[   28.738948][ T4055] pc : __arm64_sys_mount+0x2f0/0x5f8
[   28.739693][ T4055] lr : __arm64_sys_mount+0x2cc/0x5f8
[   28.740544][ T4055] sp : ffff80001f697c80
[   28.741227][ T4055] x29: ffff80001f697d20 x28: 0000000000400100 x27: 00000000fffffff2
[   28.742578][ T4055] x26: 0000000000000f5f x25: 0000000000000000 x24: 0000fffff42f60a1
[   28.743866][ T4055] x23: ffff0000c6618000 x22: 0000fffff42f7000 x21: dfff800000000000
[   28.745281][ T4055] x20: 00000000ffffff5f x19: 0000000000000000 x18: 0000000000000000
[   28.746729][ T4055] x17: 0000000000000000 x16: ffff80000897a880 x15: 0000000000000000
[   28.748079][ T4055] x14: 0000000000000000 x13: 1ffff0000287402b x12: 0000000097863b1e
[   28.749396][ T4055] x11: ff8080000897a85c x10: 0000ffffffffffff x9 : 0000fffff42f7000
[   28.750750][ T4055] x8 : 0000fffff42f7000 x7 : ffff800008763368 x6 : 0000000000000000
[   28.752054][ T4055] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
[   28.753404][ T4055] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
[   28.754741][ T4055] Call trace:
[   28.755288][ T4055]  __arm64_sys_mount+0x2f0/0x5f8
[   28.756140][ T4055]  invoke_syscall+0x98/0x28c
[   28.756972][ T4055]  el0_svc_common+0x13c/0x258
[   28.758048][ T4055]  do_el0_svc+0x5c/0x140
[   28.758795][ T4055]  el0_svc+0x78/0x1d0
[   28.759447][ T4055]  el0t_64_sync_handler+0xcc/0xe4
[   28.760286][ T4055]  el0t_64_sync+0x1a0/0x1a4
[   28.761150][ T4055] Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) 
[   28.762435][ T4055] ---[ end trace 995ad2b6892134ed ]---
[   28.976349][ T4055] Kernel panic - not syncing: Oops - BTI: Fatal exception
[   28.977592][ T4055] SMP: stopping secondary CPUs
[   28.978438][ T4055] Kernel Offset: disabled
[   28.979164][ T4055] CPU features: 0xa,000003c1,7d33ffd9
[   28.980008][ T4055] Memory Limit: none
[   29.172174][ T4055] Rebooting in 86400 seconds..