diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2015-03-01 10:11:05 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-04-19 10:10:51 +0200 |
| commit | 391f1c610abe2db94c3e5c7ae20528ebf9ed682f (patch) | |
| tree | 972cb70cca828fb609efba31a56107cedbe1e4d3 | |
| parent | 94efa6abf172d13d70c167388f327f4b5cee7e02 (diff) | |
console: Fix console name size mismatch
commit 30a22c215a0007603ffc08021f2e8b64018517dd upstream.
commit 6ae9200f2cab7 ("enlarge console.name") increased the storage
for the console name to 16 bytes, but not the corresponding
struct console_cmdline::name storage. Console names longer than
8 bytes cause read beyond end-of-string and failure to match
console; I'm not sure if there are other unexpected consequences.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | kernel/printk.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/printk.c b/kernel/printk.c index f7aff4bd5454..fd0154a57d6e 100644 --- a/kernel/printk.c +++ b/kernel/printk.c @@ -107,7 +107,7 @@ static struct console *exclusive_console; */ struct console_cmdline { - char name[8]; /* Name of the driver */ + char name[16]; /* Name of the driver */ int index; /* Minor dev. to use */ char *options; /* Options for the driver */ #ifdef CONFIG_A11Y_BRAILLE_CONSOLE @@ -2290,6 +2290,8 @@ void register_console(struct console *newcon) */ for (i = 0; i < MAX_CMDLINECONSOLES && console_cmdline[i].name[0]; i++) { + BUILD_BUG_ON(sizeof(console_cmdline[i].name) != + sizeof(newcon->name)); if (strcmp(console_cmdline[i].name, newcon->name) != 0) continue; if (newcon->index >= 0 && |