debian/patches/extra/0002-Fix-off-by-one-error-constructing-mount-options.patch

   1 From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
   2 From: srd424 <srd424@users.noreply.github.com>
   3 Date: Sun, 3 Jul 2022 10:21:30 +0100
   4 Subject: [PATCH] Fix off-by-one error constructing mount options
   5
   6 This fixes a really subtle off-by-one error constructing overlay mount options if rootfs options are provided and modern overlayfs (i.e. requiring a workdir) is used. We need to allow for the extra "," required to separate the extra options when computing the length!
   7
   8 Signed-off-by: srd424 <srd424@users.noreply.github.com>
   9 ---
  10  src/lxc/storage/overlay.c | 2 +-
  11  1 file changed, 1 insertion(+), 1 deletion(-)
  12
  13 diff --git a/src/lxc/storage/overlay.c b/src/lxc/storage/overlay.c
  14 index f8094fada..0c3fa1220 100644
  15 --- a/src/lxc/storage/overlay.c
  16 +++ b/src/lxc/storage/overlay.c
  17 @@ -445,7 +445,7 @@ int ovl_mount(struct lxc_storage *bdev)
  18                                upper, lower, mntdata);
  19
  20                 len2 = strlen(lower) + strlen(upper) + strlen(work) +
  21 -                      strlen("upperdir=,lowerdir=,workdir=") +
  22 +                      strlen("upperdir=,lowerdir=,workdir=,") +
  23                        strlen(mntdata) + 1;
  24                 options_work = must_realloc(NULL, len2);
  25                 ret2 = snprintf(options, len2,