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9p: use copy of the options value instead of original 

v9fs_parse_options function uses strsep which modifies the value of the
v9ses->options field. That modified value is later passed to the function
that creates the transport potentially making the transport creation
function to fail.

This patch creates a copy of v9ses->option field that v9fs_parse_options
function uses instead of the original value.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Latchesar Ionkov 2007-11-06 08:02:53 -06:00 committed by Eric Van Hensbergen
parent dda6b022f3
commit 8999e04f3b
1 changed files with 4 additions and 2 deletions
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6
fs/9p/v9fs.c
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@ -82,7 +82,7 @@ static match_table_t tokens = {
static void v9fs_parse_options(struct v9fs_session_info *v9ses)
{
char *options = v9ses->options;
char *options;
substring_t args[MAX_OPT_ARGS];
char *p;
int option;
@ -96,9 +96,10 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
v9ses->cache = 0;
v9ses->trans = v9fs_default_trans();
if (!options)
if (!v9ses->options)
return;
options = kstrdup(v9ses->options, GFP_KERNEL);
while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
@ -169,6 +170,7 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
continue;
}
}
kfree(options);
}
/**