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Subject[syzbot] [reiserfs?] [jfs?] BUG: unable to handle kernel paging request in reiserfs_readdir_inode

syzbot found the following issue on:

HEAD commit: 247f34f7b803 Linux 6.1-rc2
git tree: git:// for-kernelci
console output:
kernel config:
dashboard link:
compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
syz repro:

Downloadable assets:
disk image:
kernel image:
mounted in repro #1:
mounted in repro #2:

IMPORTANT: if you fix the issue, please add the following tag to the commit:

REISERFS (device loop0): Using rupasov hash to sort names
REISERFS warning (device loop0): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.
loop0: detected capacity change from 0 to 32768
Unable to handle kernel paging request at virtual address ffff00001a06e183
Mem abort info:
ESR = 0x0000000096000021
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x21: alignment fault
Data abort info:
ISV = 0, ISS = 0x00000021
CM = 0, WnR = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c54db000
[ffff00001a06e183] pgd=180000023fff8003, p4d=180000023fff8003, pud=180000023fff7003, pmd=180000023ff26003, pte=006800005a06e707
Internal error: Oops: 0000000096000021 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 3121 Comm: syz-executor.0 Not tainted 6.1.0-rc2-syzkaller-154433-g247f34f7b803 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __lse__cmpxchg_case_mb_64 arch/arm64/include/asm/atomic_lse.h:287 [inline]
pc : __cmpxchg_case_mb_64 arch/arm64/include/asm/cmpxchg.h:130 [inline]
pc : __cmpxchg_mb arch/arm64/include/asm/cmpxchg.h:175 [inline]
pc : osq_lock+0x110/0x1f8 kernel/locking/osq_lock.c:162
lr : osq_lock+0x38/0x1f8 kernel/locking/osq_lock.c:94
sp : ffff80001305b980
x29: ffff80001305b980 x28: ffff80000eec9000 x27: ffff80000cbb6d47
x26: 0000000000000000 x25: ffff800008774160 x24: ffff0000cbd3ce90
x23: ffff80000879e1b8 x22: ffff80000d2e2c40 x21: ffff00001a06e183
x20: ffff0001fefd0c40 x19: ffff0000cbd3ce70 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000 x15: 0000000000000000
x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000000000 x10: ffff0001fefd0c50 x9 : 0000000000000002
x8 : ffff0001fefd0c40 x7 : 0000000000000000 x6 : ffff80000879e1b8
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : ffff0001fefd0c40 x0 : ffff00001a06e183
Call trace:
__lse__cmpxchg_case_mb_64 arch/arm64/include/asm/atomic_lse.h:287 [inline]
__cmpxchg_case_mb_64 arch/arm64/include/asm/cmpxchg.h:130 [inline]
__cmpxchg_mb arch/arm64/include/asm/cmpxchg.h:175 [inline]
osq_lock+0x110/0x1f8 kernel/locking/osq_lock.c:162
mutex_optimistic_spin+0x1dc/0x254 kernel/locking/mutex.c:460
__mutex_lock_common+0x1b4/0xca8 kernel/locking/mutex.c:607
__mutex_lock kernel/locking/mutex.c:747 [inline]
mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
reiserfs_write_lock+0x3c/0x64 fs/reiserfs/lock.c:27
reiserfs_readdir_inode+0x9c/0x684 fs/reiserfs/dir.c:79
reiserfs_readdir+0x28/0x38 fs/reiserfs/dir.c:274
__do_sys_getdents64 fs/readdir.c:369 [inline]
__se_sys_getdents64 fs/readdir.c:354 [inline]
__arm64_sys_getdents64+0x80/0x204 fs/readdir.c:354
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall arch/arm64/kernel/syscall.c:52 [inline]
el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581
Code: aa1503e0 aa1403e1 aa1f03e2 aa0103e8 (c8e8fea2)
---[ end trace 0000000000000000 ]---
Code disassembly (best guess):
0: aa1503e0 mov x0, x21
4: aa1403e1 mov x1, x20
8: aa1f03e2 mov x2, xzr
c: aa0103e8 mov x8, x1
* 10: c8e8fea2 casal x8, x2, [x21] <-- trapping instruction

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