REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 4029, free_space(entry_count) 2
REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 565. Fsck?
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: 0 PID: 7971 Comm: syz-executor.0 Not tainted 6.1.37-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
pc : buffer_locked include/linux/buffer_head.h:123 [inline]
pc : fix_nodes+0x398/0x7078 fs/reiserfs/fix_node.c:2578
lr : fix_nodes+0x38c/0x7078 fs/reiserfs/fix_node.c:2574
sp : ffff80001f586e00
x29: ffff80001f587040 x28: ffff80001f5874c8 x27: ffff80001f587228
x26: dfff800000000000 x25: ffff80001f587700 x24: 000000000000003e
x23: 000000000000003e x22: 0000000000000000 x21: ffff80001f587238
x20: 000000000000003e x19: ffff80001f587220 x18: 1fffe000368b5f76
x17: ffff8000155bd000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000002 x13: 00000000fffffffe x12: 0000000000000001
x11: ff80800008d61598 x10: 0000000000000002 x9 : ffff0000c4e05340
x8 : 0000000000000000 x7 : ffff80000827b5cc x6 : 0000000000000000
x5 : 0000000000000080 x4 : 0000000000000001 x3 : ffff800008d6156c
x2 : 0000000000000000 x1 : 000000000000003e x0 : 000000000000003e
Call trace:
 generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
 buffer_locked include/linux/buffer_head.h:123 [inline]
 fix_nodes+0x398/0x7078 fs/reiserfs/fix_node.c:2578
 reiserfs_cut_from_item+0x330/0x1c98 fs/reiserfs/stree.c:1742
 reiserfs_do_truncate+0x89c/0x11c8 fs/reiserfs/stree.c:1973
 reiserfs_truncate_file+0x510/0xb1c fs/reiserfs/inode.c:2310
 reiserfs_setattr+0xb58/0x101c fs/reiserfs/inode.c:3395
 notify_change+0xc24/0xec0 fs/attr.c:482
 do_truncate+0x1c0/0x28c fs/open.c:65
 do_sys_ftruncate+0x288/0x31c 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+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
 el0_svc+0x58/0x168 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:581
Code: 97de5f1f 6b1802ff 540001a1 d343fec8 (387a6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	97de5f1f 	bl	0xffffffffff797c7c
   4:	6b1802ff 	cmp	w23, w24
   8:	540001a1 	b.ne	0x3c  // b.any
   c:	d343fec8 	lsr	x8, x22, #3
* 10:	387a6908 	ldrb	w8, [x8, x26] <-- trapping instruction