I've just opened #1807675 for the new bug. Thanks!
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1803160 Title: qemu-3.1.0-rc0: tcg.c crash in temp_load Status in QEMU: Fix Committed Bug description: QEMU version: ------------- qemu-3.1.0-rc0 compiled from sources (earlier versions also affected) Summary: -------- TCG crashes in i386 and x86_64 when it tries to execute some specific illegal instructions. When running full OS emulation, both the guest system and QEMU crash. The issue has been reproduced in two scenarios: Ubuntu x64 host running Debian x86 guest with the following command line: qemu-system-x86_64 -m 4G debian.qcow When the attached ELF file is executed inside the guest, QEMU crashes. It can also be reproduced from the command line: $ qemu-i386 tcg_crash.elf /home/alberto/Documents/qemu-3.1.0-rc0/tcg/tcg.c:2863: tcg fatal error qemu: uncaught target signal 11 (Segmentation fault) - core dumped zsh: segmentation fault (core dumped) ../qemu-3.1.0-rc0/build/i386-linux-user/qemu-i386 tcg_crash.elf GDB backtrace: (gdb) bt #0 0x0000000060206488 in raise () #1 0x0000000060206b8a in abort () #2 0x0000000060007016 in temp_load (s=s@entry=0x607a2780 <tcg_init_ctx>, ts=ts@entry=0x607a3178 <tcg_init_ctx+2552>, desired_regs=<optimized out>, allocated_regs=allocated_regs@entry=16400) at /home/alberto/Documents/qemu-3.1.0-rc0/tcg/tcg.c:2863 #3 0x000000006000a4d9 in tcg_reg_alloc_op (op=0x62808c20, s=<optimized out>) at /home/alberto/Documents/qemu-3.1.0-rc0/tcg/tcg.c:3070 #4 tcg_gen_code (s=<optimized out>, tb=tb@entry=0x607ac040 <static_code_gen_buffer+4144>) at /home/alberto/Documents/qemu-3.1.0-rc0/tcg/tcg.c:3598 #5 0x000000006003ef9a in tb_gen_code (cpu=cpu@entry=0x627e0010, pc=pc@entry=134512724, cs_base=cs_base@entry=0, flags=flags@entry=4194483, cflags=cflags@entry=0) at /home/alberto/Documents/qemu-3.1.0-rc0/accel/tcg/translate-all.c:1752 #6 0x000000006003d979 in tb_find (cf_mask=0, tb_exit=0, last_tb=0x0, cpu=0x0) at /home/alberto/Documents/qemu-3.1.0-rc0/accel/tcg/cpu-exec.c:404 #7 cpu_exec (cpu=cpu@entry=0x627e0010) at /home/alberto/Documents/qemu-3.1.0-rc0/accel/tcg/cpu-exec.c:724 #8 0x000000006006e1a0 in cpu_loop (env=env@entry=0x627e82c0) at /home/alberto/Documents/qemu-3.1.0-rc0/linux-user/i386/cpu_loop.c:93 #9 0x00000000600037c5 in main (argc=2, argv=0x7fffffffdd28, envp=<optimized out>) at /home/alberto/Documents/qemu-3.1.0-rc0/linux-user/main.c:819 (gdb) Testcase: --------- Find ELF file attached. To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1803160/+subscriptions
