Mesa (master): util/build-id: check dlpi_name before strstr call
Tapani Pälli
tpalli at kemper.freedesktop.org
Fri Mar 17 05:36:36 UTC 2017
Module: Mesa
Branch: master
Commit: 70d25cae8b9769d155eb8cabf4095f2b36d9265f
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=70d25cae8b9769d155eb8cabf4095f2b36d9265f
Author: Tapani Pälli <tapani.palli at intel.com>
Date: Thu Mar 16 08:10:57 2017 +0200
util/build-id: check dlpi_name before strstr call
According to dl_iterate_phdr man page first object visited is the
main program where dlpi_name is an empty string. This fixes segfault
on Android when using build-id as identifier.
Fixes: d4fa083e11f ("util: Add utility build-id code.")
Signed-off-by: Tapani Pälli <tapani.palli at intel.com>
Reviewed-by: Plamena Manolova <plamena.manolova at intel.com>
Reviewed-by: Emil Velikov <emil.velikov at collabora.com>
Reviewed-by: Matt Turner <mattst88 at gmail.com>
---
src/util/build_id.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/util/build_id.c b/src/util/build_id.c
index c53e71ddfd..898a15f2b3 100644
--- a/src/util/build_id.c
+++ b/src/util/build_id.c
@@ -55,6 +55,12 @@ build_id_find_nhdr_callback(struct dl_phdr_info *info, size_t size, void *data_)
{
struct callback_data *data = data_;
+ /* The first object visited by callback is the main program.
+ * Android's libc returns a NULL pointer for the first executable.
+ */
+ if (info->dlpi_name == NULL)
+ return 0;
+
char *ptr = strstr(info->dlpi_name, data->filename);
if (ptr == NULL || ptr[strlen(data->filename)] != '\0')
return 0;
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