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mount: handle a case when a source argument is empty (v2)

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For example:
mount -t tmpfs "" test

v2: don't leak memory

Reported-by: Ross Boucher <boucher@gmail.com>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
This commit is contained in:
Andrey Vagin
2015-07-17 17:40:22 +03:00
committed by Pavel Emelyanov
parent 18034bb642
commit 34cb65ce5d
1 changed files with 8 additions and 1 deletions
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9
proc_parse.c
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@@ -1024,8 +1024,15 @@ static int parse_mountinfo_ent(char *str, struct mount_info *new, char **fsname)
str += n;
ret = sscanf(str, "%ms %ms %ms", fsname, &new->source, &opt);
if (ret != 3)
if (ret == 2) {
/* src may be empty */
opt = new->source;
new->source = xstrdup("");
if (new->source == NULL)
goto err;
} else if (ret != 3)
goto err;
/*
* The kernel reports "subtypes" sometimes and the valid
* type-vs-subtype delimiter is the dot symbol. We disregard