Re: [syzbot] [maple-tree?] BUG: unable to handle kernel paging request in mas_walk

syzbot
2024-06-04T15:18:04Z

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
BUG: unable to handle kernel paging request in corrupted

Unable to handle kernel paging request at virtual address 007f8000826099b8
Mem abort info:
ESR = 0x0000000096000004
EC = 0x25: DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
FSC = 0x04: level 0 translation fault
Data abort info:
ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
CM = 0, WnR = 0, TnD = 0, TagAccess = 0
GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[007f8000826099b8] address between user and kernel address ranges

Tested on:

commit: 63ab6007 maple_tree: Check dead node in mas_walk() whe..
git tree: git://git.infradead.org/users/jedix/linux-maple.git syz_20240603
console output: https://syzkaller.appspot.com/x/log.txt?x=14842a16980000
kernel config: https://syzkaller.appspot.com/x/.config?x=bd6024aedb15e15c
dashboard link: https://syzkaller.appspot.com/bug?extid=c67d06ab25a9bc4adf35
compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
userspace arch: arm64

Note: no patches were applied.