Could you try with current head-of-git (the 2.12 rc4)? We adjusted our logic for setting up the initial reserved space since 2.11 -- it may well not fix this bug, but maybe we'll be lucky...
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1765970 Title: qemu-arm (user mode) segfaults in uclibc-ng chroot after upgrade to 2.11.x Status in QEMU: New Bug description: I use a qemu-user chroot + binfmt to build software targetting a raspberry pi. After upgrading from qemu-2.10.1 to 2.11.1 (Gentoo host), I noticed that on my uclibc-ng chroot qemu-arm will segfault when running python and importing the portage module. I have bisected qemu down to this commit: https://github.com/qemu/qemu/commit/18e80c55bb6ec17c05ec0ba717ec83933c2bfc07 If I recompile and change MAX_RESERVED_VA (from the above commit) back to 0x77000000 the problem goes away. NB I have no idea what that does, I just thought I'd see. Other arm chroots (glibc, musl) do not segfault with qemu-2.11, only the uclibc-ng one. Not sure why. The following backtrace was generated from running qemu-arm in gdb and recreating the segfault: (gdb) where #0 0x0000000060726046 in static_code_gen_buffer () #1 0x0000000060048789 in cpu_tb_exec (cpu=0x6278e310, itb=0x60725f80 <static_code_gen_buffer+314624>) at /usr/src/debug/app-emulation/qemu-2.11.1-r2/qemu-2.11.1/accel/tcg/cpu-exec.c:167 #2 0x000000006004937f in cpu_loop_exec_tb (cpu=0x6278e310, tb=0x60725f80 <static_code_gen_buffer+314624>, last_tb=0x7fffffffd138, tb_exit=0x7fffffffd130) at /usr/src/debug/app-emulation/qemu-2.11.1-r2/qemu-2.11.1/accel/tcg/cpu-exec.c:627 #3 0x0000000060049600 in cpu_exec (cpu=0x6278e310) at /usr/src/debug/app-emulation/qemu-2.11.1-r2/qemu-2.11.1/accel/tcg/cpu-exec.c:736 #4 0x00000000600511c3 in cpu_loop (env=0x627965b0) at /usr/src/debug/app-emulation/qemu-2.11.1-r2/qemu-2.11.1/linux-user/main.c:585 #5 0x00000000600534eb in main (argc=4, argv=0x7fffffffd9b8, envp=0x7fffffffd9e0) at /usr/src/debug/app-emulation/qemu-2.11.1-r2/qemu-2.11.1/linux-user/main.c:4882 (gdb) info reg rax 0x627965b0 1652123056 rbx 0x62717870 1651603568 rcx 0x606da000 1617797120 rdx 0x60726000 1618108416 rsi 0x60726000 1618108416 rdi 0x627965b0 1652123056 rbp 0x7fffffffd0c0 0x7fffffffd0c0 rsp 0x7fffffffd080 0x7fffffffd080 r8 0x0 0 r9 0x2 2 r10 0x0 0 r11 0x629280a0 1653768352 r12 0x60260e40 1613106752 r13 0x0 0 r14 0x606a5018 1617580056 r15 0x0 0 rip 0x60048789 0x60048789 <cpu_tb_exec+266> eflags 0x10282 [ SF IF RF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 (gdb) To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1765970/+subscriptions
