gfs2: fsid=syz:syz.0:  H: s:SH f:H e:0 p:7029 [syz-executor.3] __gfs2_lookup+0xb0/0x270 fs/gfs2/inode.c:888
Unable to handle kernel paging request at virtual address dfff800000000004
KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000004] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:

CPU: 0 PID: 7045 Comm: syz-executor.3 Not tainted 6.4.0-rc7-syzkaller-00127-ge40939bbfc68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : pid_is_meaningful fs/gfs2/glock.c:1457 [inline]
pc : dump_holder fs/gfs2/glock.c:2266 [inline]
pc : gfs2_dump_glock+0xac0/0x15ac fs/gfs2/glock.c:2382
lr : rcu_read_lock include/linux/rcupdate.h:774 [inline]
lr : dump_holder fs/gfs2/glock.c:2265 [inline]
lr : gfs2_dump_glock+0xa50/0x15ac fs/gfs2/glock.c:2382
sp : ffff8000977d6ec0
x29: ffff8000977d71c0
 x28: ffff8000977d6fa0
 x27: ffff800097387170

x26: 0000000000000026
 x25: 0000000000000040
 x24: 0000000000000006

x23: dfff800000000000
 x22: ffff800090b6c000
 x21: ffff8000977d6fc0

x20: 0000000000000001
 x19: 0000000000000004
 x18: 1fffe00036842bc6
x17: ffff80008deed000 x16: ffff80008a4483a0 x15: 0000000000000002
x14: 1ffff00011bde0ac x13: dfff800000000000 x12: 000000002a64d96e
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
x8 : ffff0000d9100000 x7 : ffff8000823be4b4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : ffff80008aa82880 x0 : 0000000000000001
Call trace:
 pid_is_meaningful fs/gfs2/glock.c:1457 [inline]
 dump_holder fs/gfs2/glock.c:2266 [inline]
 gfs2_dump_glock+0xac0/0x15ac fs/gfs2/glock.c:2382
 gfs2_consist_inode_i+0xe8/0x10c fs/gfs2/util.c:465
 gfs2_dirent_scan+0x458/0x584 fs/gfs2/dir.c:602
 gfs2_dirent_search+0x28c/0x790 fs/gfs2/dir.c:850
 gfs2_dir_search+0xb8/0x280 fs/gfs2/dir.c:1650
 gfs2_lookupi+0x3a4/0x500 fs/gfs2/inode.c:332
 __gfs2_lookup+0xb0/0x270 fs/gfs2/inode.c:888
 gfs2_atomic_open+0x9c/0x1c4 fs/gfs2/inode.c:1289
 atomic_open fs/namei.c:3355 [inline]
 lookup_open fs/namei.c:3463 [inline]
 open_last_lookups fs/namei.c:3560 [inline]
 path_openat+0xb10/0x27f8 fs/namei.c:3788
 do_filp_open+0x1bc/0x3cc fs/namei.c:3818
 do_sys_openat2+0x128/0x3d8 fs/open.c:1356
 do_sys_open fs/open.c:1372 [inline]
 __do_sys_openat fs/open.c:1388 [inline]
 __se_sys_openat fs/open.c:1383 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1383
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191
 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: 39122e68 977dba08 9100831a d343ff53 (38f76a68) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	39122e68 	strb	w8, [x19, #1163]
   4:	977dba08 	bl	0xfffffffffdf6e824
   8:	9100831a 	add	x26, x24, #0x20
   c:	d343ff53 	lsr	x19, x26, #3
* 10:	38f76a68 	ldrsb	w8, [x19, x23] <-- trapping instruction