diff options
Diffstat (limited to 'gnu/packages/patches/glib-CVE-2021-27219-08.patch')
| -rw-r--r-- | gnu/packages/patches/glib-CVE-2021-27219-08.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/gnu/packages/patches/glib-CVE-2021-27219-08.patch b/gnu/packages/patches/glib-CVE-2021-27219-08.patch new file mode 100644 index 0000000000..2c021ad317 --- /dev/null +++ b/gnu/packages/patches/glib-CVE-2021-27219-08.patch @@ -0,0 +1,94 @@ +From ba8ca443051f93a74c0d03d62e70402036f967a5 Mon Sep 17 00:00:00 2001 +From: Philip Withnall <pwithnall@endlessos.org> +Date: Thu, 4 Feb 2021 13:58:32 +0000 +Subject: [PATCH 08/11] gkeyfilesettingsbackend: Handle long keys when + converting paths + +Previously, the code in `convert_path()` could not handle keys longer +than `G_MAXINT`, and would overflow if that was exceeded. + +Convert the code to use `gsize` and `g_memdup2()` throughout, and +change from identifying the position of the final slash in the string +using a signed offset `i`, to using a pointer to the character (and +`strrchr()`). This allows the slash to be at any position in a +`G_MAXSIZE`-long string, without sacrificing a bit of the offset for +indicating whether a slash was found. + +Signed-off-by: Philip Withnall <pwithnall@endlessos.org> +Helps: #2319 +--- + gio/gkeyfilesettingsbackend.c | 21 ++++++++++----------- + 1 file changed, 10 insertions(+), 11 deletions(-) + +diff --git a/gio/gkeyfilesettingsbackend.c b/gio/gkeyfilesettingsbackend.c +index cd5765afd..25b057672 100644 +--- a/gio/gkeyfilesettingsbackend.c ++++ b/gio/gkeyfilesettingsbackend.c +@@ -33,6 +33,7 @@ + #include "gfilemonitor.h" + #include "gsimplepermission.h" + #include "gsettingsbackendinternal.h" ++#include "gstrfuncsprivate.h" + #include "giomodule-priv.h" + #include "gportalsupport.h" + +@@ -145,8 +146,8 @@ convert_path (GKeyfileSettingsBackend *kfsb, + gchar **group, + gchar **basename) + { +- gint key_len = strlen (key); +- gint i; ++ gsize key_len = strlen (key); ++ const gchar *last_slash; + + if (key_len < kfsb->prefix_len || + memcmp (key, kfsb->prefix, kfsb->prefix_len) != 0) +@@ -155,38 +156,36 @@ convert_path (GKeyfileSettingsBackend *kfsb, + key_len -= kfsb->prefix_len; + key += kfsb->prefix_len; + +- for (i = key_len; i >= 0; i--) +- if (key[i] == '/') +- break; ++ last_slash = strrchr (key, '/'); + + if (kfsb->root_group) + { + /* if a root_group was specified, make sure the user hasn't given + * a path that ghosts that group name + */ +- if (i == kfsb->root_group_len && memcmp (key, kfsb->root_group, i) == 0) ++ if (last_slash != NULL && (last_slash - key) == kfsb->root_group_len && memcmp (key, kfsb->root_group, last_slash - key) == 0) + return FALSE; + } + else + { + /* if no root_group was given, ensure that the user gave a path */ +- if (i == -1) ++ if (last_slash == NULL) + return FALSE; + } + + if (group) + { +- if (i >= 0) ++ if (last_slash != NULL) + { +- *group = g_memdup (key, i + 1); +- (*group)[i] = '\0'; ++ *group = g_memdup2 (key, (last_slash - key) + 1); ++ (*group)[(last_slash - key)] = '\0'; + } + else + *group = g_strdup (kfsb->root_group); + } + + if (basename) +- *basename = g_memdup (key + i + 1, key_len - i); ++ *basename = g_memdup2 (last_slash + 1, key_len - (last_slash - key)); + + return TRUE; + } +-- +2.30.1 + |