On Mon, Sep 30, 2024 at 6:40 PM syzbot <syzbot+61123a5daeb9f7454599@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: cea5425829f7 Add linux-next specific files for 20240930 > git tree: linux-next > console output: https://syzkaller.appspot.com/x/log.txt?x=14eccea9980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=41a28720ed564c6a > dashboard link: https://syzkaller.appspot.com/bug?extid=61123a5daeb9f7454599 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > > Unfortunately, I don't have any reproducer for this issue yet. > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/566995596f19/disk-cea54258.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/e7c506c1c71d/vmlinux-cea54258.xz > kernel image: https://storage.googleapis.com/syzbot-assets/7fcb4468b8c0/bzImage-cea54258.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+61123a5daeb9f7454599@xxxxxxxxxxxxxxxxxxxxxxxxx > > ================================================================== > BUG: KASAN: out-of-bounds in instrument_memcpy_before include/linux/instrumented.h:163 [inline] > BUG: KASAN: out-of-bounds in copy_from_kernel_nofault+0x7a/0x2f0 mm/maccess.c:35 > Read of size 6 at addr fffffffffffffffd by task syz.1.54/5558 This is due to the recent commit in mm/maccess.c and might be false-positive according to the report. Fix for the proper arguments' check has been already sent. See pending patch: https://lore.kernel.org/linux-mm/20240930102405.2227124-1-snovitoll@xxxxxxxxx/T/#u
