On 26.10.22 08:59, syzbot wrote:
Hello, syzbot found the following issue on: HEAD commit: 4da34b7d175d Merge tag 'thermal-6.1-rc2' of git://git.kern.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=113bd8bc880000 kernel config: https://syzkaller.appspot.com/x/.config?x=4789759e8a6d5f57 dashboard link: https://syzkaller.appspot.com/bug?extid=273b547b15eb58ea35e8 compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=161e1f62880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16dd4fe6880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/a61ddb36c296/disk-4da34b7d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ceee41246252/vmlinux-4da34b7d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+273b547b15eb58ea35e8@xxxxxxxxxxxxxxxxxxxxxxxxx tlb_finish_mmu+0xcb/0x200 mm/mmu_gather.c:363 exit_mmap+0x2b1/0x670 mm/mmap.c:3098 __mmput+0x114/0x3b0 kernel/fork.c:1185 exit_mm+0x217/0x2f0 kernel/exit.c:516 do_exit+0x5e7/0x2070 kernel/exit.c:807 do_group_exit+0x1fd/0x2b0 kernel/exit.c:950 __do_sys_exit_group kernel/exit.c:961 [inline] __se_sys_exit_group kernel/exit.c:959 [inline] __x64_sys_exit_group+0x3b/0x40 kernel/exit.c:959 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd ------------[ cut here ]------------ WARNING: CPU: 0 PID: 3908 at mm/huge_memory.c:2465 __split_huge_page_tail+0x81c/0x1080 mm/huge_memory.c:2465
Is this the VM_BUG_ON_PAGE(atomic_read(&page_tail->_mapcount) != -1, page_tail); assertion? -- Thanks, David / dhildenb
