If dladdr returns 0, don't go and use the returned Dl_info, it may contain garbage.
X.Org bug#44315 <https://bugs.freedesktop.org/show_bug.cgi?id=44315> Reported-and-tested-by: Cyril Brulebois <[email protected]> Signed-off-by: Julien Cristau <[email protected]> --- os/backtrace.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/os/backtrace.c b/os/backtrace.c index 58b4b1f..298bf18 100644 --- a/os/backtrace.c +++ b/os/backtrace.c @@ -46,7 +46,11 @@ void xorg_backtrace(void) ErrorF("\nBacktrace:\n"); size = backtrace(array, 64); for (i = 0; i < size; i++) { - dladdr(array[i], &info); + int rc = dladdr(array[i], &info); + if (rc == 0) { + ErrorF("%d: ?? [%p]\n", i, array[i]); + continue; + } mod = (info.dli_fname && *info.dli_fname) ? info.dli_fname : "(vdso)"; if (info.dli_saddr) ErrorF("%d: %s (%s+0x%lx) [%p]\n", i, mod, -- 1.7.7.3 _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
