syzbot

loop0: detected capacity change from 0 to 512
EXT2-fs (loop0): warning: mounting ext3 filesystem as ext2
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4223 Comm: syz.0.17 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 : ext2_ioctl+0x548/0x8dc fs/ext2/ioctl.c:74
lr : ext2_ioctl+0x524/0x8dc fs/ext2/ioctl.c:74
sp : ffff80001fdb7ce0
x29: ffff80001fdb7ce0 x28: ffff0000c0b651c0 x27: 0000000000000004
x26: 1fffe0001816ca38 x25: 0000000000000000 x24: dfff800000000000
x23: 0000000000000000 x22: 0000000000000001 x21: ffff0000cf8c4500
x20: ffff0000ee0f8138 x19: 00000000fffffff2 x18: 0000000000000000
x17: ffff800016d04000 x16: ffff800008dc87e0 x15: ffff8000167e4500
x14: ffff0000c0b65bc0 x13: dfff800000000000 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff800016eaa980 x4 : 0000000000000002 x3 : ffff8000082bfb8c
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 ext2_ioctl+0x548/0x8dc fs/ext2/ioctl.c:74
 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: d503229f 2a1f03f3 2a1f03e0 b8400959 (2a1303e1) 
---[ end trace 1878e2c8c0714439 ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1f03f3 	mov	w19, wzr
   8:	2a1f03e0 	mov	w0, wzr
   c:	b8400959 	ldtr	w25, [x10]
* 10:	2a1303e1 	mov	w1, w19 <-- trapping instruction