REISERFS warning (device loop6): sh-2029: %s: bitmap block (#%u) reading failed reiserfs_read_bitmap_block: reiserfs_read_bitmap_block
REISERFS warning (device loop6): sh-2029: %s: bitmap block (#%u) reading failed reiserfs_read_bitmap_block: reiserfs_read_bitmap_block
Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
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
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6444 Comm: syz.6.430 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
pc : set_buffer_uptodate include/linux/buffer_head.h:148 [inline]
pc : do_journal_end+0xce0/0x3bb0 fs/reiserfs/journal.c:4083
lr : __getblk include/linux/buffer_head.h:411 [inline]
lr : do_journal_end+0xcd8/0x3bb0 fs/reiserfs/journal.c:4080
sp : ffff800021f06de0
x29: ffff800021f07010 x28: ffff0000d5cdc000 x27: ffff0000d5cdc678
x26: ffff0000d5cdc678 x25: ffff800021de9048 x24: ffff0000fa9b000f
x23: ffff0000d5cdc018 x22: 0000000000000000 x21: 0000000000000012
x20: ffff0000c04a0b00 x19: dfff800000000000 x18: ffff800011a6bd40
x17: ffff800018186000 x16: ffff8000082ea2c4 x15: ffff800017c67000
x14: ffff0000f7fb4218 x13: ffff0000f7fb42b8 x12: 0000000000080000
x11: 0000000000009350 x10: ffff800022aec000 x9 : ffff800008a81bcc
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000020 x4 : 0000000000000000 x3 : ffff800008a81994
x2 : 0000000000000001 x1 : 0000000000000003 x0 : 0000000000000000
Call trace:
 __getblk include/linux/buffer_head.h:411 [inline]
 do_journal_end+0xce0/0x3bb0 fs/reiserfs/journal.c:4080
 journal_end+0x1cc/0x270 fs/reiserfs/journal.c:3418
 restart_transaction+0xf4/0x1cc fs/reiserfs/inode.c:268
 reiserfs_get_block+0x1e0c/0x3524 fs/reiserfs/inode.c:766
 __block_write_begin_int+0x34c/0x13b8 fs/buffer.c:1991
 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041
 reiserfs_write_begin+0x328/0x71c fs/reiserfs/inode.c:2775
 generic_cont_expand_simple+0x12c/0x1fc fs/buffer.c:2347
 reiserfs_setattr+0x564/0xf7c fs/reiserfs/inode.c:3305
 notify_change+0xb0c/0xdcc fs/attr.c:499
 do_truncate+0x178/0x1f0 fs/open.c:65
 do_sys_ftruncate+0x284/0x31c fs/open.c:193
 __do_sys_ftruncate fs/open.c:204 [inline]
 __se_sys_ftruncate fs/open.c:202 [inline]
 __arm64_sys_ftruncate+0x60/0x74 fs/open.c:202
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 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: 52800103 97f6a697 d343fc08 aa0003f6 (38736908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800103 	mov	w3, #0x8                   	// #8
   4:	97f6a697 	bl	0xffffffffffda9a60
   8:	d343fc08 	lsr	x8, x0, #3
   c:	aa0003f6 	mov	x22, x0
* 10:	38736908 	ldrb	w8, [x8, x19] <-- trapping instruction