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* grub-core/kern/emu/getroot.c (find_root_device_from_mountinfo):

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Fix prefix check to handle the case where dir ends with a slash
(most significantly, "/" itself).
Reported by: Michael Vogt.
This commit is contained in:
Colin Watson 2011-01-06 11:09:17 +00:00
parent b3f8d28ad0
commit 71b6a2b7a2
2 changed files with 12 additions and 1 deletions
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6
grub-core/kern/emu/getroot.c
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@ -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