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    SubjectRe: "Switch !O_CREAT case to use of do_last()" causes segfault in glibc
    On Sat, Mar 06, 2010 at 05:59:18PM +0000, Al Viro wrote:
    > On Sat, Mar 06, 2010 at 09:43:42AM -0800, walt wrote:
    > > Hi Al,
    > > commit 1f36f774b22a0ceb7dd33eca626746c81a97b6a5
    > > Author: Al Viro <viro@zeniv.linux.org.uk>
    > > Date: Sat Dec 26 10:56:19 2009 -0500
    > >
    > > Switch !O_CREAT case to use of do_last()
    > >
    > > ... and now we have all intents crap well localized
    > >
    > > This commit is triggering a segfault when I try to open a spreadsheet in
    > > openoffice:
    > >
    > > Program received signal SIGSEGV, Segmentation fault.
    > > 0x00007ffff6d13129 in __readdir (dirp=0x0) at ../sysdeps/unix/readdir.c:45
    > > 45 ../sysdeps/unix/readdir.c: No such file or directory.
    > > in ../sysdeps/unix/readdir.c
    > > (gdb) bt
    > > #0 0x00007ffff6d13129 in __readdir (dirp=0x0) at ../sysdeps/unix/readdir.c:45
    > > #1 0x00007ffff1dc58b0 in ?? () from /usr/lib/libicuuc.so.42
    > > #2 0x00007ffff1dc591d in ?? () from /usr/lib/libicuuc.so.42
    > > #3 0x00007ffff1dc5d7e in uprv_tzname_4_2 () from /usr/lib/libicuuc.so.42
    > > #4 0x00007fffd7f73601 in icu_4_2::TimeZone::initDefault() () from /usr/lib/libicui18n.so.42
    > > #5 0x00007fffd7f738c5 in icu_4_2::TimeZone::createDefault() () from /usr/lib/libicui18n.so.42
    > > #6 0x00007fffd7f6e5c9 in icu_4_2::Calendar::createInstance(icu_4_2::Locale const&, UErrorCode&) ()
    > > from /usr/lib/libicui18n.so.42
    >
    > Very interesting. Could you give the relevant parts of strace (or reproduce
    > it with something less monumental than openoffice)?

    _Really_ interesting; it doesn't look like an oops - smells like an attempt
    to do opendir() that fails for some reason, goes unnoticed and resulting
    FILE * (i.e. NULL) is fed to readdir()?

    What does it attempt to open?


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