main/musl: fix for getmntent

fixes #5703

2 files changed, 71 insertions, 1 deletions

diff --git a/main/musl/0001-use-dynamic-buffer-for-getmntent.patch b/main/musl/0001-use-dynamic-buffer-for-getmntent.patch
new file mode 100644
index 0000000000..12feaa8266
--- /dev/null
+++ b/main/musl/0001-use-dynamic-buffer-for-getmntent.patch
@@ -0,0 +1,66 @@
+From c0dd2db34a8a5d51699406a90a4f87cb3129d5a1 Mon Sep 17 00:00:00 2001
+From: Natanael Copa <ncopa@alpinelinux.org>
+Date: Thu, 8 Sep 2016 09:06:22 +0200
+Subject: [PATCH] use dynamic buffer for getmntent
+
+overlayfs may have fairly long lines so we use getline to allocate a
+buffer dynamically. The buffer will be allocated on first use, expand as
+needed, but will never be free'ed.
+
+Downstream bug: http://bugs.alpinelinux.org/issues/5703
+
+Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
+---
+ src/misc/mntent.c | 16 ++++++++++++----
+ 1 file changed, 12 insertions(+), 4 deletions(-)
+
+diff --git a/src/misc/mntent.c b/src/misc/mntent.c
+index a16d652..722a030 100644
+--- a/src/misc/mntent.c
++++ b/src/misc/mntent.c
+@@ -3,6 +3,11 @@
+ #include <mntent.h>
+ #include <errno.h>
+ 
++static char *internal_buf = NULL;
++static size_t internal_bufsize = 0;
++
++#define SENTINEL (char *)&internal_buf
++
+ FILE *setmntent(const char *name, const char *mode)
+ {
+        return fopen(name, mode);
+@@ -16,13 +21,17 @@ int endmntent(FILE *f)
+ 
+ struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen)
+ {
+-       int cnt, n[8];
++       int cnt, n[8], use_internal = (linebuf == SENTINEL);
+ 
+        mnt->mnt_freq = 0;
+        mnt->mnt_passno = 0;
+ 
+        do {
+-               fgets(linebuf, buflen, f);
++               if (use_internal) {
++                       getline(&internal_buf, &internal_bufsize, f);
++                       linebuf = internal_buf;
++               } else
++                       fgets(linebuf, buflen, f);
+                if (feof(f) || ferror(f)) return 0;
+                if (!strchr(linebuf, '\n')) {
+                        fscanf(f, "%*[^\n]%*[\n]");
+@@ -49,9 +58,8 @@ struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int bufle
+ 
+ struct mntent *getmntent(FILE *f)
+ {
+-       static char linebuf[256];
+        static struct mntent mnt;
+-       return getmntent_r(f, &mnt, linebuf, sizeof linebuf);
++       return getmntent_r(f, &mnt, SENTINEL, 0);
+ }
+ 
+ int addmntent(FILE *f, const struct mntent *mnt)
+-- 
+2.10.0
+
diff --git a/main/musl/APKBUILD b/main/musl/APKBUILD
index e010239e6d..02c68e4832 100644
--- a/main/musl/APKBUILD
+++ b/main/musl/APKBUILD
@@ -2,7 +2,7 @@
 # Maintainer: Timo Teräs <timo.teras@iki.fi>
 pkgname=musl
 pkgver=1.1.14
-pkgrel=11
+pkgrel=12
 pkgdesc="the musl c library (libc) implementation"
 url="http://www.musl-libc.org/"
 arch="all"
@@ -33,6 +33,7 @@ source="http://www.musl-libc.org/releases/musl-$pkgver.tar.gz
         0019-fix-misordered-syscall-arguments-for-posix_fadvise-o.patch
         0020-improve-abort-fallback-behavior-when-raising-SIGABRT.patch
         0021-fix-asctime-day-month-names-not-to-vary-by-locale.patch
+        0001-use-dynamic-buffer-for-getmntent.patch
 
         ldconfig
         __stack_chk_fail_local.c
@@ -161,6 +162,7 @@ f34ce9786c13ae945a4dff0c6f3436af  0018-in-performing-dns-lookups-check-result-fr
 1220568cdbac3e61faf6d6104029aefb  0019-fix-misordered-syscall-arguments-for-posix_fadvise-o.patch
 252d72f8100f0661e7f335da4ac195e6  0020-improve-abort-fallback-behavior-when-raising-SIGABRT.patch
 c08825383e41e5dbcd3ffdfd2062dd47  0021-fix-asctime-day-month-names-not-to-vary-by-locale.patch
+c6b8732eea4642112c56f45ff00e356a  0001-use-dynamic-buffer-for-getmntent.patch
 830d01f7821b978df770b06db3790921  ldconfig
 0df687757221bbb0fc1aa67f1bd646f9  __stack_chk_fail_local.c
 57ef2c63b9ec6a2041694ace97d4ffa2  getconf.c
@@ -188,6 +190,7 @@ da4935744d9d6b60f06a9e6af9badd3c239d13cba204c9a10007b23fd10d6275  0017-fix-misal
 54454457d7e25e01624a2ebd96b01d8c53448e410f69106d3d62bafacfddcc48  0019-fix-misordered-syscall-arguments-for-posix_fadvise-o.patch
 03c776222b65ab374c8659d61f905a9618c460994d70bb9b80655ba6a668c1d4  0020-improve-abort-fallback-behavior-when-raising-SIGABRT.patch
 d157100aeed5b0866eb6d50288f63f26ea9900f1d4c7b8a1492294c912b5cc19  0021-fix-asctime-day-month-names-not-to-vary-by-locale.patch
+e1671e2436954f2eec0d2f49dd53e9e66ff0106c9c017a7ff69d35bdb7051055  0001-use-dynamic-buffer-for-getmntent.patch
 b4a2c06db38742e8c42c3c9838b285a7d8cdac6c091ff3df5ff9a15f1e41b9c7  ldconfig
 299a7d75a09de3e2e11e7fb4acc3182e4a14e868093d2f30938fce9bfcff13da  __stack_chk_fail_local.c
 d87d0cbb3690ae2c5d8cc218349fd8278b93855dd625deaf7ae50e320aad247c  getconf.c
@@ -215,6 +218,7 @@ a497943a0bc3752027467e21988e402eeab9ad2a7f37bc43cdbd05f6b45677e9cc72a200143f0b4f
 99857974627729664d0f4c3427e0d5e8843a07deb77c7ef7381e060eacb629fab926ab18d966a1d55ab4b032ef812363e74d549c03941c0982bd950e27294a18  0019-fix-misordered-syscall-arguments-for-posix_fadvise-o.patch
 b8c50dbb33fa9cd8ae40b97f9662bedfc6fce4272e1e34b11daf14847b99e9a2bdc2dd9916329c0a407945e21d0070e8306e3ed2d1f857fc83ca64d430e4623a  0020-improve-abort-fallback-behavior-when-raising-SIGABRT.patch
 1a74d5f5e0f6f2fe6029ed0f18b4603f80c990f19aa13d83c5d1f40f032b2ffb3819aae13ae1f96415bb08571774eec164e71d09028f2a5db4ae9b77e48cafe7  0021-fix-asctime-day-month-names-not-to-vary-by-locale.patch
+a25ff6c640fed110c124f2b12920111befa832202b906649e1d21613dda32b55bada0d59b310f4af2d4ae27c9ce2c92079ba1c919b4898c002f271c7a0c04878  0001-use-dynamic-buffer-for-getmntent.patch
 8d3a2d5315fc56fee7da9abb8b89bb38c6046c33d154c10d168fb35bfde6b0cf9f13042a3bceee34daf091bc409d699223735dcf19f382eeee1f6be34154f26f  ldconfig
 062bb49fa54839010acd4af113e20f7263dde1c8a2ca359b5fb2661ef9ed9d84a0f7c3bc10c25dcfa10bb3c5a4874588dff636ac43d5dbb3d748d75400756d0b  __stack_chk_fail_local.c
 0d80f37b34a35e3d14b012257c50862dfeb9d2c81139ea2dfa101d981d093b009b9fa450ba27a708ac59377a48626971dfc58e20a3799084a65777a0c32cbc7d  getconf.c