On Tue, 12 Jan 2021 at 21:32, Nathan Chancellor <natechancel...@gmail.com> wrote: > > On Tue, Jan 12, 2021 at 12:40:58PM -0700, Nathan Chancellor wrote: > > On Tue, Jan 12, 2021 at 11:20:27AM -0800, syzbot wrote: > > > Hello, > > > > > > syzbot found the following issue on: > > > > > > HEAD commit: e609571b Merge tag 'nfs-for-5.11-2' of > > > git://git.linux-nfs.. > > > git tree: upstream > > > console output: https://syzkaller.appspot.com/x/log.txt?x=15965a00d00000 > > > kernel config: https://syzkaller.appspot.com/x/.config?x=6157970d0a91b812 > > > dashboard link: > > > https://syzkaller.appspot.com/bug?extid=76880518931d755473cf > > > compiler: clang version 11.0.0 > > > (https://github.com/llvm/llvm-project.git > > > ca2dcbd030eadbf0aa9b660efe864ff08af6e18b) > > > > > > IMPORTANT: if you fix the issue, please add the following tag to the > > > commit: > > > Reported-by: syzbot+76880518931d75547...@syzkaller.appspotmail.com > > > > > > clang-11: error: unable to execute command: Aborted (core dumped) > > > clang-11: error: clang frontend command failed due to signal (use -v to > > > see invocation) > > > > > > --- > > > This report is generated by a bot. It may contain errors. > > > See https://goo.gl/tpsmEJ for more information about syzbot. > > > syzbot engineers can be reached at syzkal...@googlegroups.com. > > > > > > syzbot will keep track of this issue. See: > > > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > > > Would it be possible for clang-built-li...@googlegroups.com to be CC'd > > when there is a build error and the compiler is clang? Especially if > > clang is hitting an assertion. > > I cannot reproduce this with clang 11.0.1. I did a reverse bisect on > LLVM and found commit 4b0aa5724fea ("Change the INLINEASM_BR MachineInstr > to be a non-terminating instruction.") as the fix (which makes sense, > that commit has direct kernel implications). It is probably worth > upgrading syzkaller's clang to 11.0.1, where I have not seen any > assertions across all of the configurations that I test. > > Ccing Dmitry and Marco directly.
I'll upgrade syzbot's clang 11. I think the version we use right now was still a pre-release. Thanks, -- Marco
