On Wed, 26 Oct 2022 at 02:54, David Hildenbrand <david@xxxxxxxxxx> wrote: > > 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? Hi David, You can check the sources for that revision, but on the dashboard there are clickable links for all source references: https://syzkaller.appspot.com/bug?extid=273b547b15eb58ea35e8 In this case it points to: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/mm/huge_memory.c?id=4da34b7d175dc99b8befebd69e96546c960d526c#n2465
