* strace.c (startup_child): initgroups is unsafe in a vfork child
because it parses /etc/group. Unfortunately it's not obvious what to
do instead.
Signed-off-by: Jamie Lokier <ja...@shareable.org>
---
strace.c | 4 +++-
1 files changed, 3 insertions(+), 1 deletions(-)
diff --git a/strace.c b/strace.c
index 40f8907..726738b 100644
--- a/strace.c
+++ b/strace.c
@@ -620,7 +620,9 @@ startup_child (char **argv)
* lose privileges on setuid.
*/
if (username != NULL) {
- if (initgroups(username, run_gid) < 0) {
+ /* initgroups is not safe in a vfork child. */
+ if (!strace_vforked
+ && initgroups(username, run_gid) < 0) {
perror("initgroups");
exit(1);
}
--
1.7.0.4
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