** Also affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1285363
Title:
qemu-aarch64-static segfaults
Status in QEMU:
New
Status in “qemu” package in Ubuntu:
Confirmed
Bug description:
I've found a couple conditions that causes qemu-user-static to core
dump fairly reliably - same with upstream git - while a binary built
from suse's aarch64-1.6 branch seems to consistently work fine.
Testing suggests they are resolved by the sigprocmask wrapper patches
included in suse's tree.
1) dh_fixperms is a script that commonly runs at the end of a package build.
Its basically doing a `find | xargs chmod`.
2) debootstrap --second-stage
This is used to configure an arm64 chroot that was built using
debootstrap on a non-native host. It is basically invoking a bunch of
shell scripts (postinst, etc). When it blows up, the stack consistently
looks like this:
Core was generated by `/usr/bin/qemu-aarch64-static /bin/sh -e
/debootstrap/debootstrap --second-stage'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x0000000060058e55 in memcpy (__len=8, __src=0x7fff62ae34e0,
__dest=0x400082c330) at
/usr/include/x86_64-linux-gnu/bits/string3.h:51
51 return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
(gdb) bt
#0 0x0000000060058e55 in memcpy (__len=8, __src=0x7fff62ae34e0,
__dest=0x400082c330) at
/usr/include/x86_64-linux-gnu/bits/string3.h:51
#1 stq_p (v=274886476624, ptr=0x400082c330) at
/mnt/qemu.upstream/include/qemu/bswap.h:280
#2 stq_le_p (v=274886476624, ptr=0x400082c330) at
/mnt/qemu.upstream/include/qemu/bswap.h:315
#3 target_setup_sigframe (set=0x7fff62ae3530, env=0x62d9c678,
sf=0x400082b0d0) at /mnt/qemu.upstream/linux-user/signal.c:1167
#4 target_setup_frame (usig=usig@entry=17, ka=ka@entry=0x604ec1e0
<sigact_table+512>, info=info@entry=0x0, set=set@entry=0x7fff62ae3530,
env=env@entry=0x62d9c678)
at /mnt/qemu.upstream/linux-user/signal.c:1286
#5 0x0000000060059f46 in setup_frame (env=0x62d9c678,
set=0x7fff62ae3530, ka=0x604ec1e0 <sigact_table+512>, sig=17) at
/mnt/qemu.upstream/linux-user/signal.c:1322
#6 process_pending_signals (cpu_env=cpu_env@entry=0x62d9c678) at
/mnt/qemu.upstream/linux-user/signal.c:5747
#7 0x0000000060056e60 in cpu_loop (env=env@entry=0x62d9c678) at
/mnt/qemu.upstream/linux-user/main.c:1082
#8 0x0000000060005079 in main (argc=<optimized out>, argv=<optimized
out>, envp=<optimized out>) at
/mnt/qemu.upstream/linux-user/main.c:4374
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