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: 7397 Comm: syz.7.673 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/26/2026
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+0xcec/0x3bac fs/reiserfs/journal.c:4083
lr : __getblk include/linux/buffer_head.h:411 [inline]
lr : do_journal_end+0xce4/0x3bac fs/reiserfs/journal.c:4080
sp : ffff800020b47260
x29: ffff800020b47480 x28: ffff0000d261e000 x27: ffff0000d261e678
x26: ffff0000d261e678 x25: ffff800022419048 x24: ffff0000e202f00f
x23: ffff0000d261e018 x22: 0000000000000000 x21: 000000009d731ae6
x20: ffff0000c0543700 x19: dfff800000000000 x18: ffff800011b9bf60
x17: ffff80001835b000 x16: ffff8000082eef80 x15: ffff8000081a1b9c
x14: 0000000000000001 x13: 1fffff80007e7e4e x12: 0000000000ff0100
x11: ff00800008a916bc x10: 0000000000000000 x9 : ffff800008a916bc
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000008 x3 : ffff800008a9148c
x2 : 0000000000000001 x1 : 0000000000000003 x0 : 0000000000000000
Call trace:
 __getblk include/linux/buffer_head.h:411 [inline]
 do_journal_end+0xcec/0x3bac fs/reiserfs/journal.c:4080
 do_journal_release+0x410/0x460 fs/reiserfs/journal.c:1940
 journal_release+0x2c/0x40 fs/reiserfs/journal.c:1971
 reiserfs_put_super+0x1fc/0x44c fs/reiserfs/super.c:616
 generic_shutdown_super+0x130/0x324 fs/super.c:501
 kill_block_super+0x70/0xdc fs/super.c:1470
 reiserfs_kill_sb+0x124/0x13c fs/reiserfs/super.c:570
 deactivate_locked_super+0xac/0x120 fs/super.c:332
 deactivate_super+0xe4/0x104 fs/super.c:363
 cleanup_mnt+0x390/0x418 fs/namespace.c:1191
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1198
 task_work_run+0x1ec/0x278 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0x550/0x19b0 kernel/exit.c:880
 do_group_exit+0x194/0x22c kernel/exit.c:1022
 get_signal+0x11cc/0x1304 kernel/signal.c:2871
 do_signal arch/arm64/kernel/signal.c:1095 [inline]
 do_notify_resume+0x33c/0x2aa4 arch/arm64/kernel/signal.c:1148
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x98/0x128 arch/arm64/kernel/entry-common.c:638
 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 97f69447 d343fc08 aa0003f6 (38736908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800103 	mov	w3, #0x8                   	// #8
   4:	97f69447 	bl	0xffffffffffda5120
   8:	d343fc08 	lsr	x8, x0, #3
   c:	aa0003f6 	mov	x22, x0
* 10:	38736908 	ldrb	w8, [x8, x19] <-- trapping instruction