23-Oct-2026 20:53:08: building syzkaller on 25905f5d0a2a7883bd33491997556193582c6059... 23-Oct-2026 20:53:31: fetching kernel... 23-Oct-2026 20:53:35: checked out kernel commit 792fbe1537d8daeca9bd1917e84078b5432aadc2 ("Linux 5.15.223", 2026-10-15 14:14:32 +0200 +0200) 23-Oct-2026 20:53:35: cleaning kernel... 23-Oct-2026 20:53:36: building kernel... 23-Oct-2026 21:00:39: kernel built successfully with compiler Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 23-Oct-2026 21:00:39: testing patch... 23-Oct-2026 21:05:25: 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: 0 PID: 4055 Comm: syz-executor Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 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 : ffff80001f2c7c80 x29: ffff80001f2c7d20 x28: 0000000000400100 x27: 00000000fffffff2 x26: 0000000000000d4f x25: 0000000000000000 x24: 0000ffffe0ab72b1 x23: ffff0000c7a60000 x22: 0000ffffe0ab8000 x21: dfff800000000000 x20: 00000000fffffd4f x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80000897dfb4 x15: 0000000000000000 x14: 1ffff0000287802b x13: dfff800000000000 x12: 0000000082d2c423 x11: ff8080000897df90 x10: 0000ffffffffffff x9 : 0000ffffe0ab8000 x8 : 0000ffffe0ab8000 x7 : ffff800008766a24 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+0x78/0x1d4 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 f81c0c26d8944b7d ]--- ---------------- 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 [ 12.043284][ T3712] eql: remember to turn off Van-Jacobson compression on your slave devices Starting crond: OK [ 12.081054][ T148] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 12.088643][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.139' (ED25519) to the list of known hosts. 1970/01/01 00:00:30 ignoring optional flag "type"="gce" 1970/01/01 00:00:31 parsed 1 programs syzkaller login: [ 31.111165][ T4055] cgroup: Unknown subsys name 'net' [ 31.154252][ T4055] Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP [ 31.155831][ T4055] Modules linked in: [ 31.156566][ T4055] CPU: 0 PID: 4055 Comm: syz-executor Not tainted syzkaller #0 [ 31.157906][ T4055] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026 [ 31.159859][ T4055] pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) [ 31.161317][ T4055] pc : __arm64_sys_mount+0x2f0/0x5f8 [ 31.162152][ T4055] lr : __arm64_sys_mount+0x2cc/0x5f8 [ 31.163206][ T4055] sp : ffff80001f2c7c80 [ 31.164109][ T4055] x29: ffff80001f2c7d20 x28: 0000000000400100 x27: 00000000fffffff2 [ 31.165889][ T4055] x26: 0000000000000d4f x25: 0000000000000000 x24: 0000ffffe0ab72b1 [ 31.167736][ T4055] x23: ffff0000c7a60000 x22: 0000ffffe0ab8000 x21: dfff800000000000 [ 31.169498][ T4055] x20: 00000000fffffd4f x19: 0000000000000000 x18: 0000000000000000 [ 31.171123][ T4055] x17: 0000000000000000 x16: ffff80000897dfb4 x15: 0000000000000000 [ 31.172842][ T4055] x14: 1ffff0000287802b x13: dfff800000000000 x12: 0000000082d2c423 [ 31.174505][ T4055] x11: ff8080000897df90 x10: 0000ffffffffffff x9 : 0000ffffe0ab8000 [ 31.176267][ T4055] x8 : 0000ffffe0ab8000 x7 : ffff800008766a24 x6 : 0000000000000000 [ 31.178016][ T4055] x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 [ 31.179718][ T4055] x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 [ 31.181524][ T4055] Call trace: [ 31.182281][ T4055] __arm64_sys_mount+0x2f0/0x5f8 [ 31.183415][ T4055] invoke_syscall+0x98/0x28c [ 31.184419][ T4055] el0_svc_common+0x13c/0x258 [ 31.185428][ T4055] do_el0_svc+0x5c/0x140 [ 31.186383][ T4055] el0_svc+0x78/0x1d4 [ 31.187258][ T4055] el0t_64_sync_handler+0xcc/0xe4 [ 31.188333][ T4055] el0t_64_sync+0x1a0/0x1a4 [ 31.189312][ T4055] Code: d503229f 2a1903fb 2a1903e0 38400933 (2a1b03e1) [ 31.190879][ T4055] ---[ end trace f81c0c26d8944b7d ]--- [ 31.379738][ T4055] Kernel panic - not syncing: Oops - BTI: Fatal exception [ 31.380949][ T4055] SMP: stopping secondary CPUs [ 31.381841][ T4055] Kernel Offset: disabled [ 31.382720][ T4055] CPU features: 0xa,000003c1,7d33ffd9 [ 31.383805][ T4055] Memory Limit: none [ 31.586771][ T4055] Rebooting in 86400 seconds..