From 692f127447d399db21c2e93026d4d2b0ac1839d1 Mon Sep 17 00:00:00 2001 From: "Richard W.M. Jones" Date: Sat, 13 Nov 2010 14:49:37 +0000 Subject: [PATCH] inspect: Refuse to parse /etc/fstab if it is huge. --- src/inspect.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/src/inspect.c b/src/inspect.c index 3c4c619..d0041c8 100644 --- a/src/inspect.c +++ b/src/inspect.c @@ -629,6 +629,14 @@ static int check_fstab (guestfs_h *g, struct inspect_fs *fs) { int r; + int64_t size; + + /* Security: Refuse to do this if /etc/fstab is huge. */ + size = guestfs_filesize (g, "/etc/fstab"); + if (size == -1 || size > 100000) { + error (g, _("size of /etc/fstab unreasonable (%" PRIi64 " bytes)"), size); + return -1; + } /* XXX What if !feature_available (g, "augeas")? */ if (guestfs_aug_init (g, "/", 16|32) == -1) -- 1.8.3.1