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Message-Id: <20201112184327.19431-1-ericonr@disroot.org>
Date: Thu, 12 Nov 2020 15:43:27 -0300
From: Érico Nogueira <ericonr@...root.org>
To: musl@...ts.openwall.com
Cc: Érico Rolim <ericonr@...root.org>
Subject: [PATCH] fix segfault in lutimes when tv argument is NULL
From: Érico Rolim <ericonr@...root.org>
calling lutimes with tv=0 is valid if the applications wants to set the
timestamps to the current time. short-circuit the function to call
utimensat with times=0 directly if tv == 0.
---
Bug reported on IRC by nmeum
src/legacy/lutimes.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/legacy/lutimes.c b/src/legacy/lutimes.c
index 2e5502d1..22176230 100644
--- a/src/legacy/lutimes.c
+++ b/src/legacy/lutimes.c
@@ -5,6 +5,7 @@
int lutimes(const char *filename, const struct timeval tv[2])
{
+ if (!tv) return utimensat(AT_FDCWD, filename, 0, AT_SYMLINK_NOFOLLOW);
struct timespec times[2];
times[0].tv_sec = tv[0].tv_sec;
times[0].tv_nsec = tv[0].tv_usec * 1000;
--
2.29.2
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