On Sun, Jan 09, 2022, Sabri N. Ferreiro wrote: > Hi, > > When using Syzkaller to fuzz the Linux kernel, it triggers the following crash. > > HEAD commit: a7904a538933 Linux 5.16-rc6 > git tree: upstream > console output: https://pastebin.com/raw/keWCUeJ2 > kernel config: https://docs.google.com/document/d/1w94kqQ4ZSIE6BW-5WIhqp4_Zh7XTPH57L5OF2Xb6O6o/view > C reproducer: https://pastebin.com/raw/kSxa6Yit > Syzlang reproducer: https://pastebin.com/raw/2RMu8p6E > > If you fix this issue, please add the following tag to the commit: > Reported-by: Yuheng Shen mosesfonscqf75@xxxxxxxxx > > ------------[ cut here ]------------ > WARNING: CPU: 5 PID: 29657 at arch/x86/kvm/mmu/tdp_mmu.c:46 > kvm_mmu_uninit_tdp_mmu+0xb9/0xf0 I wasn't able to reproduce to confirm, but this is more than likely fixed by commit 3a0f64de479c ("KVM: x86/mmu: Don't advance iterator after restart due to yielding"), which didn't land until 5.16-rc7.
