On 19.03.24 11:43, syzbot wrote:
Hello, syzbot found the following issue on: HEAD commit: e5eb28f6d1af Merge tag 'mm-nonmm-stable-2024-03-14-09-36' .. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1383c6c9180000 kernel config: https://syzkaller.appspot.com/x/.config?x=4ffb854606e658d dashboard link: https://syzkaller.appspot.com/bug?extid=e145145f0c83d4deb8fa compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14583abe180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14298231180000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-e5eb28f6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/a5c7ad05d6b2/vmlinux-e5eb28f6.xz kernel image: https://storage.googleapis.com/syzbot-assets/531cb1917612/bzImage-e5eb28f6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e145145f0c83d4deb8fa@xxxxxxxxxxxxxxxxxxxxxxxxx WARNING: CPU: 2 PID: 5169 at mm/memory.c:1539 zap_present_ptes mm/memory.c:1539 [inline] WARNING: CPU: 2 PID: 5169 at mm/memory.c:1539 zap_pte_range mm/memory.c:1603 [inline] WARNING: CPU: 2 PID: 5169 at mm/memory.c:1539 zap_pmd_range mm/memory.c:1720 [inline] WARNING: CPU: 2 PID: 5169 at mm/memory.c:1539 zap_pud_range mm/memory.c:1749 [inline] WARNING: CPU: 2 PID: 5169 at mm/memory.c:1539 zap_p4d_range mm/memory.c:1770 [inline] WARNING: CPU: 2 PID: 5169 at mm/memory.c:1539 unmap_page_range+0x2a54/0x3bf0 mm/memory.c:1791
Fix is already on its way upstream: https://lkml.kernel.org/r/20240313213107.235067-1-peterx@xxxxxxxxxx Should shortly appear at mm-hotfixes-unstable. #syz fix: mm/memory: Fix missing pte marker for !page on pte zaps -- Cheers, David / dhildenb
