From 71b6a2b7a2d9d71cff26b39a941b0f7191bcea42 Mon Sep 17 00:00:00 2001 From: Colin Watson Date: Thu, 6 Jan 2011 11:09:17 +0000 Subject: [PATCH] * grub-core/kern/emu/getroot.c (find_root_device_from_mountinfo): Fix prefix check to handle the case where dir ends with a slash (most significantly, "/" itself). Reported by: Michael Vogt. --- ChangeLog | 7 +++++++ grub-core/kern/emu/getroot.c | 6 +++++- 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/ChangeLog b/ChangeLog index 0159aab3d..a6d62da6c 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,10 @@ +2011-01-06 Colin Watson + + * grub-core/kern/emu/getroot.c (find_root_device_from_mountinfo): + Fix prefix check to handle the case where dir ends with a slash + (most significantly, "/" itself). + Reported by: Michael Vogt. + 2011-01-05 Vladimir Serbinenko Run terminfo_cls on initing terminfo output to clear the screen and diff --git a/grub-core/kern/emu/getroot.c b/grub-core/kern/emu/getroot.c index 5356685e9..aedef9e0e 100644 --- a/grub-core/kern/emu/getroot.c +++ b/grub-core/kern/emu/getroot.c @@ -135,8 +135,12 @@ find_root_device_from_mountinfo (const char *dir) continue; /* only a subtree is mounted */ enc_path_len = strlen (enc_path); + /* Check that enc_path is a prefix of dir. The prefix must either be + the entire string, or end with a slash, or be immediately followed + by a slash. */ if (strncmp (dir, enc_path, enc_path_len) != 0 || - (dir[enc_path_len] && dir[enc_path_len] != '/')) + (enc_path_len && dir[enc_path_len - 1] != '/' && + dir[enc_path_len] && dir[enc_path_len] != '/')) continue; /* This is a parent of the requested directory. /proc/self/mountinfo