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pstore: Use scnprintf() in pstore_mkfile() 

No guarantees that the names will not exceed the
name buffer with future adjustments.

Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Mark Salyzyn 2015-01-06 11:18:24 -08:00 committed by Tony Luck
parent eaa27f34e9
commit dbaffde764
1 changed files with 13 additions and 10 deletions
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23
fs/pstore/inode.c
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@ -338,32 +338,35 @@ int pstore_mkfile(enum pstore_type_id type, char *psname, u64 id, int count,
switch (type) {
case PSTORE_TYPE_DMESG:
sprintf(name, "dmesg-%s-%lld%s", psname, id,
compressed ? ".enc.z" : "");
scnprintf(name, sizeof(name), "dmesg-%s-%lld%s",
psname, id, compressed ? ".enc.z" : "");
break;
case PSTORE_TYPE_CONSOLE:
sprintf(name, "console-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "console-%s-%lld", psname, id);
break;
case PSTORE_TYPE_FTRACE:
sprintf(name, "ftrace-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "ftrace-%s-%lld", psname, id);
break;
case PSTORE_TYPE_MCE:
sprintf(name, "mce-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "mce-%s-%lld", psname, id);
break;
case PSTORE_TYPE_PPC_RTAS:
sprintf(name, "rtas-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "rtas-%s-%lld", psname, id);
break;
case PSTORE_TYPE_PPC_OF:
sprintf(name, "powerpc-ofw-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "powerpc-ofw-%s-%lld",
psname, id);
break;
case PSTORE_TYPE_PPC_COMMON:
sprintf(name, "powerpc-common-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "powerpc-common-%s-%lld",
psname, id);
break;
case PSTORE_TYPE_UNKNOWN:
sprintf(name, "unknown-%s-%lld", psname, id);
scnprintf(name, sizeof(name), "unknown-%s-%lld", psname, id);
break;
default:
sprintf(name, "type%d-%s-%lld", type, psname, id);
scnprintf(name, sizeof(name), "type%d-%s-%lld",
type, psname, id);
break;
}