loop0: detected capacity change from 0 to 32768
XFS (loop0): Mounting V5 Filesystem
XFS (loop0): Ending clean mount
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4897 Comm: syz.0.15 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : fault_in_readable+0x138/0x358 mm/gup.c:1793
lr : fault_in_readable+0x114/0x358 mm/gup.c:1793
sp : ffff800020017650
x29: ffff800020017670 x28: ffff700004002f28 x27: 1ffff00004002f6c
x26: 000000000000000b x25: 000000000000000b x24: dfff800000000000
x23: 0000000020000100 x22: 0000000000400140 x21: 00000000fffffff2
x20: 000000000000000b x19: 0000002000010000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008744f24 x15: 000000000004ffff
x14: 0000000000000001 x13: 1ffff00002de328c x12: 0000000000000000
x11: ff80800008744f00 x10: 0000000020000100 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000170dc5a8 x4 : 0000000000000008 x3 : ffff8000082c5290
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 fault_in_readable+0x138/0x358 mm/gup.c:1793
 fault_in_iov_iter_readable+0x128/0x258 lib/iov_iter.c:460
 iomap_write_iter fs/iomap/buffered-io.c:761 [inline]
 iomap_file_buffered_write+0x220/0x530 fs/iomap/buffered-io.c:815
 xfs_file_buffered_write+0x314/0x990 fs/xfs/xfs_file.c:753
 xfs_file_write_iter+0x2b0/0x60c fs/xfs/xfs_file.c:833
 call_write_iter include/linux/fs.h:2173 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x590/0xa64 fs/read_write.c:594
 ksys_write+0x12c/0x228 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:656
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b0 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 381f83bf 2a1f03f5 38400948 (381f83a8) 
---[ end trace 12ad320cc4bbac2c ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	381f83bf 	sturb	wzr, [x29, #-8]
   8:	2a1f03f5 	mov	w21, wzr
   c:	38400948 	ldtrb	w8, [x10]
* 10:	381f83a8 	sturb	w8, [x29, #-8] <-- trapping instruction