loop0: detected capacity change from 0 to 256
Unable to handle kernel paging request at virtual address dfff800000000004
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000004] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 7957 Comm: syz.0.583 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026
pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : do_trace_event_raw_event_block_buffer include/trace/events/block.h:28 [inline]
pc : trace_event_raw_event_block_buffer+0x118/0x28c include/trace/events/block.h:15
lr : do_trace_event_raw_event_block_buffer include/trace/events/block.h:28 [inline]
lr : trace_event_raw_event_block_buffer+0xf4/0x28c include/trace/events/block.h:15
sp : ffff800022aa77e0
x29: ffff800022aa78a0 x28: 1fffe0001ec22627 x27: 1fffe0001ec22628
x26: ffff0000fe0b0040 x25: 0000000000000403 x24: dfff800000000000
x23: ffff800022aa7800 x22: ffff700004554f00 x21: ffff0000e19e1688
x20: ffff0000d8e77d14 x19: ffff0000e19e1658 x18: 1fffe00033c1c97e
x17: 0000000000000000 x16: ffff8000082f4984 x15: 0000000000000002
x14: fffffffffffffff5 x13: 0000000000ff0100 x12: 0000000000080000
x11: 000000000007ffff x10: ffff800022bc9000 x9 : 0000000000000004
x8 : 0000000000000024 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000198f9428 x4 : 0000000000000008 x3 : ffff8000084e1ad4
x2 : 0000000000000001 x1 : 0000000000000008 x0 : ffff0000d8e77d14
Call trace:
 do_trace_event_raw_event_block_buffer include/trace/events/block.h:28 [inline]
 trace_event_raw_event_block_buffer+0x118/0x28c include/trace/events/block.h:15
 __traceiter_block_dirty_buffer+0x74/0xc8 include/trace/events/block.h:58
 trace_block_dirty_buffer include/trace/events/block.h:58 [inline]
 mark_buffer_dirty+0x478/0x5c0 fs/buffer.c:1083
 minix_fill_super+0x10f8/0x15a0 fs/minix/inode.c:325
 mount_bdev+0x264/0x35c fs/super.c:1454
 minix_mount+0x44/0x58 fs/minix/inode.c:703
 legacy_get_tree+0xd8/0x174 fs/fs_context.c:632
 vfs_get_tree+0x90/0x278 fs/super.c:1584
 do_new_mount+0x228/0x804 fs/namespace.c:3078
 path_mount+0x5ac/0xe6c fs/namespace.c:3408
 do_mount fs/namespace.c:3421 [inline]
 __do_sys_mount fs/namespace.c:3629 [inline]
 __se_sys_mount fs/namespace.c:3606 [inline]
 __arm64_sys_mount+0x4a0/0x5a0 fs/namespace.c:3606
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x200/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x12c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 978568e1 f94002a8 91009108 d343fd09 (38f86929) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	978568e1 	bl	0xfffffffffe15a384
   4:	f94002a8 	ldr	x8, [x21]
   8:	91009108 	add	x8, x8, #0x24
   c:	d343fd09 	lsr	x9, x8, #3
* 10:	38f86929 	ldrsb	w9, [x9, x24] <-- trapping instruction