On Mon, 22 Jun 2020 at 11:49, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > > On Mon, Jun 22, 2020 at 02:37:12AM -0700, syzbot wrote: > > Hello, > > > > syzbot found the following crash on: > > > > HEAD commit: 27f11fea Add linux-next specific files for 20200622 > > git tree: linux-next > > console output: https://syzkaller.appspot.com/x/log.txt?x=138dc743100000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=41c659db5cada6f4 > > dashboard link: https://syzkaller.appspot.com/bug?extid=dbf8cf3717c8ef4a90a0 > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > Reported-by: syzbot+dbf8cf3717c8ef4a90a0@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > ./arch/x86/include/asm/kvm_para.h:99:29: error: inlining failed in call to always_inline 'kvm_handle_async_pf': function attribute mismatch > > ./arch/x86/include/asm/processor.h:824:29: error: inlining failed in call to always_inline 'prefetchw': function attribute mismatch > > ./arch/x86/include/asm/current.h:13:44: error: inlining failed in call to always_inline 'get_current': function attribute mismatch > > arch/x86/mm/fault.c:1353:1: error: inlining failed in call to always_inline 'handle_page_fault': function attribute mismatch > > ./arch/x86/include/asm/processor.h:576:29: error: inlining failed in call to always_inline 'native_swapgs': function attribute mismatch > > ./arch/x86/include/asm/fsgsbase.h:33:38: error: inlining failed in call to always_inline 'rdgsbase': function attribute mismatch > > ./arch/x86/include/asm/irq_stack.h:40:29: error: inlining failed in call to always_inline 'run_on_irqstack_cond': function attribute mismatch > > ./include/linux/debug_locks.h:15:28: error: inlining failed in call to always_inline '__debug_locks_off': function attribute mismatch > > ./include/asm-generic/atomic-instrumented.h:70:1: error: inlining failed in call to always_inline 'atomic_add_return': function attribute mismatch > > kernel/locking/lockdep.c:396:29: error: inlining failed in call to always_inline 'lockdep_recursion_finish': function attribute mismatch > > kernel/locking/lockdep.c:4725:5: error: inlining failed in call to always_inline '__lock_is_held': function attribute mismatch > > Hurmph, I though that was cured in GCC >= 8. Marco? Yeah, time to upgrade syzbot's compiler. This experimental gcc 9.0.0 still has the bug, but stable gcc 9 doesn't. For now, I think this requires no fixes on the kernel side. Thanks, -- Marco
