On Sun, Jul 08, 2018 at 10:51:03PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: b2d44d145d2a Merge tag '4.18-rc3-smb3fixes' of git://git.s.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11d07748400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=2ca6c7a31d407f86 > dashboard link: https://syzkaller.appspot.com/bug?extid=3f84280d52be9b7083cc > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+3f84280d52be9b7083cc@xxxxxxxxxxxxxxxxxxxxxxxxx > > next ffff8801ce5e7040 prev ffff8801d20eca50 mm ffff88019c1e13c0 > prot 27 anon_vma ffff88019680cdd8 vm_ops 0000000000000000 > pgoff 0 file ffff8801b2ec2d00 private_data 0000000000000000 > flags: 0xff(read|write|exec|shared|mayread|maywrite|mayexec|mayshare) > ------------[ cut here ]------------ > kernel BUG at mm/memory.c:1422! Looks like vma_is_anonymous() false-positive. Any clues what file is it? I would guess some kind of socket, but it's not clear from log which exactly. -- Kirill A. Shutemov
