Package: xdelta3
Version: 3.0.11-dfsg-1
Severity: important
X-Debbugs-Cc: debian-sparc@lists.debian.org, onitake@gmail.com
User: debian-sparc@lists.debian.org
Usertags: sparc64
In specific circumstances, xdelta3 produces a bus error on sparc64,
presumably because of unaligned memory access.
This makes the tool practically unusable on this architecture.
Example stack trace:
(gdb) run encode -0 -f -D -s fromfile tofile delta
Starting program: /usr/bin/xdelta3 encode -0 -f -D -s fromfile tofile delta
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/sparc64-linux-gnu/libthread_db.so.1".
Program received signal SIGBUS, Bus error.
0x000000000010ce60 in xd3_forward_match (n=9213, s2c=0x2306a3 "clude <stdio.h>\n\nint main(int argc, char** argv) {\n return 0;\n}\n",
s1c=0xfffff80100c10413 "clude <stdio.h>\n\nint main(int argc, char** argv) {\n return 0;\n}\n") at xdelta3.c:3891
warning: 3891 xdelta3.c: No such file or directory
(gdb) bt
#0 0x000000000010ce60 in xd3_forward_match (n=9213, s2c=0x2306a3 "clude <stdio.h>\n\nint main(int argc, char** argv) {\n return 0;\n}\n",
s1c=0xfffff80100c10413 "clude <stdio.h>\n\nint main(int argc, char** argv) {\n return 0;\n}\n") at xdelta3.c:3891
#1 xd3_source_extend_match (stream=stream@entry=0x7feffffe270) at xdelta3.c:4045
#2 0x000000000010dd98 in xd3_string_match_fastest (stream=0x7feffffe270) at xdelta3.c:4729
#3 0x000000000011105c in xd3_encode_input (stream=0x7feffffe270) at xdelta3.c:3226
#4 0x0000000000116ca4 in main_input (cmd=cmd@entry=CMD_ENCODE, ifile=ifile@entry=0x7feffffe800, ofile=ofile@entry=0x7feffffe860, sfile=sfile@entry=0x7feffffe8c0) at xdelta3-main.h:3201
#5 0x0000000000104fc8 in main (argc=<optimized out>, argv=<optimized out>) at xdelta3-main.h:3912
The test files are attached, they originate from the pristine-tar build process.
-- System Information:
Debian Release: forky/sid
APT prefers unreleased
APT policy: (500, 'unreleased'), (500, 'unstable')
Architecture: sparc64
Kernel: Linux 6.16.11+deb14-sparc64 (UP)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages xdelta3 depends on:
ii libc6 2.41-12
ii liblzma5 5.8.1-2
xdelta3 recommends no packages.
xdelta3 suggests no packages.
-- no debconf information
Attachment:
xdelta3-sigbus-sparc64.tgz
Description: application/gzip