do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
==================================================================
BUG: KASAN: null-ptr-deref in xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline]
BUG: KASAN: null-ptr-deref in xlog_cil_commit+0x2f4/0x1fe4 fs/xfs/xfs_log_cil.c:1264
Write of size 88 at addr 0000000000000000 by task syz-executor.3/12428

CPU: 0 PID: 12428 Comm: syz-executor.3 Not tainted 5.15.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:438 [inline]
 kasan_report+0x168/0x1e4 mm/kasan/report.c:451
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 memset+0x58/0x88 mm/kasan/shadow.c:44
 xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline]
 xlog_cil_commit+0x2f4/0x1fe4 fs/xfs/xfs_log_cil.c:1264
 __xfs_trans_commit+0x740/0xe98 fs/xfs/xfs_trans.c:881
 xfs_trans_commit+0x24/0x34 fs/xfs/xfs_trans.c:925
 xfs_bmap_add_attrfork+0x760/0x930 fs/xfs/libxfs/xfs_bmap.c:1136
 xfs_attr_set+0x6d4/0x11e0 fs/xfs/libxfs/xfs_attr.c:746
 xfs_xattr_set+0x1a8/0x30c fs/xfs/xfs_xattr.c:59
 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216
 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303
 do_setxattr fs/xattr.c:588 [inline]
 setxattr+0x250/0x2b4 fs/xattr.c:611
 path_setxattr+0x17c/0x258 fs/xattr.c:630
 __do_sys_setxattr fs/xattr.c:646 [inline]
 __se_sys_setxattr fs/xattr.c:642 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
==================================================================
Unable to handle kernel paging request at virtual address dfff800000000003
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
[dfff800000000003] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 12428 Comm: syz-executor.3 Tainted: G    B             5.15.148-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:227 [inline]
pc : xlog_cil_commit+0x304/0x1fe4 fs/xfs/xfs_log_cil.c:1264
lr : xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline]
lr : xlog_cil_commit+0x2f4/0x1fe4 fs/xfs/xfs_log_cil.c:1264
sp : ffff80001d6070a0
x29: ffff80001d6071c0 x28: dfff800000000000 x27: 1ffff00003ac0e30
x26: 1fffe0001b947750 x25: 0000000000000000 x24: ffff0000dca3ba10
x23: 0000000000000150 x22: dfff800000000000 x21: ffff0000dca3ba80
x20: 0000000000000002 x19: dfff800000000000 x18: 1fffe000368fe78e
x17: 1fffe000368fe78e x16: ffff800011982264 x15: ffff8000149bed40
x14: ffff0001b47f3c80 x13: ffff0001b47f3c7c x12: 0000000000040000
x11: 000000000001f940 x10: ffff80001eabd000 x9 : 0000000000000000
x8 : 0000000000000003 x7 : 0000000000000000 x6 : ffff800008268424
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000819b844
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000018
Call trace:
 xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:227 [inline]
 xlog_cil_commit+0x304/0x1fe4 fs/xfs/xfs_log_cil.c:1264
 __xfs_trans_commit+0x740/0xe98 fs/xfs/xfs_trans.c:881
 xfs_trans_commit+0x24/0x34 fs/xfs/xfs_trans.c:925
 xfs_bmap_add_attrfork+0x760/0x930 fs/xfs/libxfs/xfs_bmap.c:1136
 xfs_attr_set+0x6d4/0x11e0 fs/xfs/libxfs/xfs_attr.c:746
 xfs_xattr_set+0x1a8/0x30c fs/xfs/xfs_xattr.c:59
 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216
 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303
 do_setxattr fs/xattr.c:588 [inline]
 setxattr+0x250/0x2b4 fs/xattr.c:611
 path_setxattr+0x17c/0x258 fs/xattr.c:630
 __do_sys_setxattr fs/xattr.c:646 [inline]
 __se_sys_setxattr fs/xattr.c:642 [inline]
 __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 91006320 d2d00016 d343fc08 f2fbfff6 (38736908) 
---[ end trace bf09f3f60c71a793 ]---
----------------
Code disassembly (best guess):
   0:	91006320 	add	x0, x25, #0x18
   4:	d2d00016 	mov	x22, #0x800000000000        	// #140737488355328
   8:	d343fc08 	lsr	x8, x0, #3
   c:	f2fbfff6 	movk	x22, #0xdfff, lsl #48
* 10:	38736908 	ldrb	w8, [x8, x19] <-- trapping instruction