loop3: detected capacity change from 0 to 4096 EXT4-fs (loop3): mounted filesystem without journal. Opts: nojournal_checksum,,errors=continue. Quota mode: writeback. Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4189 Comm: syz.3.12 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) pc : ext4_shutdown fs/ext4/ioctl.c:567 [inline] pc : __ext4_ioctl fs/ext4/ioctl.c:1254 [inline] pc : ext4_ioctl+0x1d44/0x3614 fs/ext4/ioctl.c:1282 lr : ext4_shutdown fs/ext4/ioctl.c:567 [inline] lr : __ext4_ioctl fs/ext4/ioctl.c:1254 [inline] lr : ext4_ioctl+0x1d1c/0x3614 fs/ext4/ioctl.c:1282 sp : ffff80001fc778c0 x29: ffff80001fc77cd0 x28: dfff800000000000 x27: ffff700003f8ef1c x26: 1fffe0001a9df4cf x25: ffff0000d4ef8000 x24: ffff0000d4efa000 x23: ffff0000c69cd1c0 x22: 0000000000000000 x21: 0000000020000080 x20: ffff0000d4efa678 x19: 00000000fffffff2 x18: 0000000000000000 x17: 0000000000000002 x16: ffff800008cc38d0 x15: 00000000c0c0583b x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100 x11: 0000000000000000 x10: 0000000020000080 x9 : 0000ffffffffffff x8 : 0000000020000080 x7 : ffff800008750ed4 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001 x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: ext4_shutdown fs/ext4/ioctl.c:567 [inline] __ext4_ioctl fs/ext4/ioctl.c:1254 [inline] ext4_ioctl+0x1d44/0x3614 fs/ext4/ioctl.c:1282 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 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: ea29011f 9a9f02aa d503229f b8400956 (2a1303e1) ---[ end trace 6452a7a702f79815 ]--- ---------------- Code disassembly (best guess): 0: ea29011f bics xzr, x8, x9 4: 9a9f02aa csel x10, x21, xzr, eq // eq = none 8: d503229f csdb c: b8400956 ldtr w22, [x10] * 10: 2a1303e1 mov w1, w19 <-- trapping instruction