REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 3 0(1) DIR], item_len 35, item_location 3876, free_space(entry_count) 2
REISERFS error (device loop3): vs-5150 search_by_key: invalid format found in block 549. Fsck?
REISERFS (device loop3): Remounting filesystem read-only
Unable to handle kernel paging request at virtual address dfff800000000005
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
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
[dfff800000000005] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4577 Comm: syz.3.14 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/23/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : reiserfs_node_data fs/reiserfs/reiserfs.h:2184 [inline]
pc : item_head fs/reiserfs/reiserfs.h:2200 [inline]
pc : tp_item_head fs/reiserfs/reiserfs.h:2226 [inline]
pc : direct2indirect+0x5ec/0xed8 fs/reiserfs/tail_conversion.c:119
lr : tp_item_head fs/reiserfs/reiserfs.h:2226 [inline]
lr : direct2indirect+0x5b4/0xed8 fs/reiserfs/tail_conversion.c:119
sp : ffff800022077040
x29: ffff800022077180 x28: 0000000000000028 x27: ffff800022077510
x26: 0000000100000fff x25: 0000000000000000 x24: dfff800000000000
x23: ffff8000220774f8 x22: ffff0000ff828ed0 x21: ffff8000220774f0
x20: 0000000000000000 x19: ffff0000ff8bde90 x18: 1fffe00033c1877e
x17: ffff80001641d000 x16: ffff800011bcec98 x15: 0000000000000002
x14: 00000000fffffffe x13: 0000000000ff0100 x12: 0000000000080000
x11: 0000000000012c1e x10: ffff80002882a000 x9 : ffff800008cf6eb4
x8 : 0000000000000005 x7 : ffff80000825ab2c x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800008aa4a0c
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000008
Call trace:
 reiserfs_node_data fs/reiserfs/reiserfs.h:2184 [inline]
 item_head fs/reiserfs/reiserfs.h:2200 [inline]
 tp_item_head fs/reiserfs/reiserfs.h:2226 [inline]
 direct2indirect+0x5ec/0xed8 fs/reiserfs/tail_conversion.c:119
 reiserfs_get_block+0x336c/0x3860 fs/reiserfs/inode.c:949
 __block_write_begin_int+0x3d8/0x13c0 fs/buffer.c:1991
 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041
 reiserfs_write_begin+0x328/0x718 fs/reiserfs/inode.c:2775
 generic_perform_write+0x240/0x508 mm/filemap.c:3862
 __generic_file_write_iter+0x130/0x250 mm/filemap.c:3960
 generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:3989
 call_write_iter include/linux/fs.h:2271 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3c8/0x7c8 fs/read_write.c:584
 ksys_pwrite64 fs/read_write.c:699 [inline]
 __do_sys_pwrite64 fs/read_write.c:709 [inline]
 __se_sys_pwrite64 fs/read_write.c:706 [inline]
 __arm64_sys_pwrite64+0x178/0x210 fs/read_write.c:706
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/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: 35001548 9100a29c b9800374 d343ff88 (38786908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	35001548 	cbnz	w8, 0x2a8
   4:	9100a29c 	add	x28, x20, #0x28
   8:	b9800374 	ldrsw	x20, [x27]
   c:	d343ff88 	lsr	x8, x28, #3
* 10:	38786908 	ldrb	w8, [x8, x24] <-- trapping instruction