{"id":1029,"date":"2010-10-22T19:39:42","date_gmt":"2010-10-22T16:39:42","guid":{"rendered":"http:\/\/www.void.gr\/kargig\/blog\/?p=1029"},"modified":"2010-11-23T21:36:40","modified_gmt":"2010-11-23T19:36:40","slug":"investigating-sigabrt-problems-on-debian","status":"publish","type":"post","link":"https:\/\/www.void.gr\/kargig\/blog\/2010\/10\/22\/investigating-sigabrt-problems-on-debian\/","title":{"rendered":"Investigating SIGABRT problems on Debian"},"content":{"rendered":"

3 days ago, after a Debian(squeeze\/sid) upgrade on my laptop some programs started not to open. Specifically, pidgin and google-chrome were crashing while trying to open them. When I started them from a terminal the output was this:
\n

kargig@laptop:~%pidgin\n[1]    3853 abort      pidgin\nkargig@laptop:~%google-chrome\n[1]    3882 abort      google-chrome\n<\/code2><\/pre><\/p>\n
The first thing I checked was the updated packages, whether there was some culprit.
\nThe upgraded packages included among others:
\n
[UPGRADE] libk5crypto3 1.8.3+dfsg-1 -> 1.8.3+dfsg-2\n[UPGRADE] libkrb5-3 1.8.3+dfsg-1 -> 1.8.3+dfsg-2\n[UPGRADE] libkrb5support0 1.8.3+dfsg-1 -> 1.8.3+dfsg-2\n[UPGRADE] libnspr4-0d 4.8.4-2 -> 4.8.6-1\n[UPGRADE] libnss3-1d 3.12.6-3 -> 3.12.8-1\n[UPGRADE] linux-base 2.6.32-23 -> 2.6.32-25\n[UPGRADE] linux-headers-2.6.32-5-686-bigmem 2.6.32-23 -> 2.6.32-25\n[UPGRADE] linux-headers-2.6.32-5-common 2.6.32-23 -> 2.6.32-25\n[UPGRADE] linux-image-2.6.32-5-686-bigmem 2.6.32-23 -> 2.6.32-25\n[UPGRADE] linux-libc-dev 2.6.32-23 -> 2.6.32-25\n[UPGRADE] xserver-xorg-video-intel 2:2.9.1-4 -> 2:2.12.0+shadow-2\n<\/code2><\/pre><\/p>\n
My first point of checking was the xserver-xorg-video package. I started searching the Debian bug tracking system<\/a> for references of crashes with abort. Nothing. Then I tried to check the other “suspicious” packages with abort crash reports on the bug tracker…still nothing.
\nIt was time for strace<\/a>.
\n
kargig@laptop:~%strace pidgin\n...\n[snip]\n...\nopen("\/usr\/lib\/nss\/libfreebl3.so", O_RDONLY) = 14\nread(14, "\\177ELF\\1\\1\\1\\0\\0\\0\\0\\0\\0\\0\\0\\0\\3\\0\\3\\0\\1\\0\\0\\0\\0\\30\\0\\0004\\0\\0\\0"..., 512) = 512\nfstat64(14, {st_mode=S_IFREG|0644, st_size=253328, ...}) = 0\nmmap2(NULL, 268988, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 14, 0) = 0xb58e3000\nmmap2(0xb5920000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 14, 0x3d) = 0xb5920000\nmmap2(0xb5921000, 15036, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0xb5921000\nclose(14)                               = 0\nopen("\/etc\/ld.so.cache", O_RDONLY)      = 14\nfstat64(14, {st_mode=S_IFREG|0644, st_size=79200, ...}) = 0\nmmap2(NULL, 79200, PROT_READ, MAP_PRIVATE, 14, 0) = 0xb5ab7000\nclose(14)                               = 0\naccess("\/etc\/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)\nopen("\/usr\/lib\/swiftfox\/libnspr4.so", O_RDONLY) = 14\nread(14, "\\177ELF\\1\\1\\1\\0\\0\\0\\0\\0\\0\\0\\0\\0\\3\\0\\3\\0\\1\\0\\0\\0P\\227\\0\\0004\\0\\0\\0"..., 512) = 512\nfstat64(14, {st_mode=S_IFREG|0755, st_size=251136, ...}) = 0\nclose(14)                               = 0\nmunmap(0xb5ab7000, 79200)               = 0\nrt_sigprocmask(SIG_UNBLOCK, [ABRT], NULL, 8) = 0\ntgkill(4027, 4027, SIGABRT)             = 0\n--- SIGABRT (Aborted) @ 0 (0) ---\n+++ killed by SIGABRT +++\n[1]    4026 abort      strace pidgin<\/code2><\/pre><\/p>\n
What immediately caught my eye was this line inside the output:
\nopen(\"\/usr\/lib\/swiftfox\/libnspr4.so\", O_RDONLY) = 14<\/code>
\nI have a 3rd party package called swiftfox<\/a> installed, but why was pidgin trying to use this package’s library instead of the system one ?
\n
# ldconfig -p | grep nspr4\nldconfig -p | grep nspr4\n  libnspr4.so.0d (libc6) => \/usr\/lib\/libnspr4.so.0d\n  libnspr4.so (libc6) => \/usr\/lib\/swiftfox\/libnspr4.so\n  libnspr4.so (libc6) => \/usr\/lib\/libnspr4.so<\/code2><\/pre><\/p>\n
So the system package libnspr4-0d<\/a> has installed its files in \/usr\/lib\/libnspr4.so.0d<\/em> and has also placed a symlink from \/usr\/lib\/libnspr4.so<\/em> to \/usr\/lib\/libnspr4.so.0d<\/em>. For some reason though the \/usr\/lib\/swiftfox\/libnspr4.so<\/em> appears before \/usr\/lib\/libnspr4.so<\/em> in the cache output for the libnspr4.so<\/strong> library.
\nChecking out \/etc\/ld.so.conf.d\/<\/em> directory, there was a moz.conf<\/em> file containing the path “\/usr\/lib\/swiftfox\/<\/em>“.
\nAn “ldconfig -v<\/em>” confirmed the finding:
\n
\/usr\/local\/lib:\n\/usr\/lib\/swiftfox:\n        libnssckbi.so -> libnssckbi.so\n        libssl3.so -> libssl3.so\n        libsqlite3.so -> libsqlite3.so\n        libnssutil3.so -> libnssutil3.so\n        libnss3.so -> libnss3.so\n        libnspr4.so -> libnspr4.so\n        libsmime3.so -> libsmime3.so\n        libmozjs.so -> libmozjs.so\n        libsoftokn3.so -> libsoftokn3.so\n        libplc4.so -> libplc4.so\n        libxul.so -> libxul.so\n        libplds4.so -> libplds4.so\n        libxpcom.so -> libxpcom.so\n        libnssdbm3.so -> libnssdbm3.so\n        libfreebl3.so -> libfreebl3.so\n\/lib:\n        libnss_compat.so.2 -> libnss_compat-2.11.2.so\n        libselinux.so.1 -> libselinux.so.1\n...\n[snip]\n...\n<\/code2><\/pre><\/p>\n
Moving \/usr\/lib\/swiftfox\/libnspr4.so to some other location allowed applications like pidgin and google-chrome to start normally (and swiftfox still runs properly).<\/p>\n
I guess that was my punishment for using 3rd party packages on Debian…<\/p>\n
*UPDATE 23\/11\/2010*
\nGoogle chrome was crashing with some https:\/\/ sites with SIGABRT. After further investigation I had to delete \/usr\/lib\/swiftfox\/libnssutil3.so<\/em> as well.<\/p>\n","protected":false},"excerpt":{"rendered":"
3 days ago, after a Debian(squeeze\/sid) upgrade on my laptop some programs started not to open. Specifically, pidgin and google-chrome were crashing while trying to open them. When I started them from a terminal the output was this: kargig@laptop:~%pidgin [1]    3853 abort      pidgin kargig@laptop:~%google-chrome [1]    3882 abort      google-chrome The first thing I checked was the updated packages, whether there […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ep_exclude_from_search":false,"footnotes":""},"categories":[3],"tags":[307,286,33,306,310,309,595,305,308,311,126],"class_list":["post-1029","post","type-post","status-publish","format-standard","hentry","category-linux","tag-abort","tag-crash","tag-debian","tag-google-chrome","tag-ldconfig","tag-libraries","tag-linux","tag-pidgin","tag-sigabrt","tag-strace","tag-swiftfox"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t