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authorChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
committerChristian Krinitsin <mail@krinitsin.com>2025-07-03 07:27:52 +0000
commitd0c85e36e4de67af628d54e9ab577cc3fad7796a (patch)
treef8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/permissions/1285363
parent7f4364274750eb8cb39a3e7493132fca1c01232e (diff)
downloademulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz
emulator-bug-study-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip
add deepseek and gemma results
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+
+qemu-aarch64-static segfaults
+
+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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