https://bugzilla.kernel.org/show_bug.cgi?id=218339 --- Comment #4 from Anthony L. Eden (anthony.louis.eden@xxxxxxxxx) --- >> I tried on my side but can't reproducce it, logs below. Any steps I missed ? Nope, it looks like you did everything right. I spent a little more time investigating this, since for me it's trivial to reproduce. I was able to get the guest kernel vmlinux *with* debugging information from the linux-image-6.1.0-15-amd64-dbg debian package. After entering the final `stepi` within gdb, which is when the guest goes totally unresponsive, in htop I see qemu-system-x86_64 is taking up 100% CPU. Like I said, the thread call stacks in the qemu process look typical. I used the qemu monitor command 'dump-guest-memory -p /root/linux.core' three separate times after the guest went unresponsive, and all three of the core file backtraces look like this: #0 pv_native_set_debugreg (regno=7, val=0) at arch/x86/include/asm/debugreg.h:92 #1 0xffffffff81a21533 in set_debugreg (reg=7, val=0) at arch/x86/include/asm/paravirt.h:129 #2 local_db_save () at arch/x86/include/asm/debugreg.h:127 #3 exc_debug_kernel (dr6=0, regs=0xfffffe0000010f58) at arch/x86/kernel/traps.c:1038 #4 exc_debug (regs=0xfffffe0000010f58) at arch/x86/kernel/traps.c:1175 #5 0xffffffff81c00c6a in asm_exc_debug () at /build/reproducible-path/linux-6.1.66/arch/x86/include/asm/idtentry.h:606 #6 0x0000000000000000 in ?? () My VM was in a self-contained folder with its own run script on the host so I made a tarball of it. It is available for download here (~9 GB): https://drive.google.com/file/d/1r3tlrw8kG17vFwXzP6ETv76ptNhbLYjt/view?usp=sharing Usage: $ tar xvSf deb-vm-x86_64.tar $ cd deb-vm-x86_64/ $ ./run.sh In another terminal, $ screen /dev/pts/23 115200 $ login as user 'root' with password 'root' Once inside, $ gdb /usr/bin/ls $ starti ... Oh and by the way, the version of qemu-system-x86_64 on my host is 7.2.7 (Debian 1:7.2+dfsg-7+deb12u3). -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
