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| author | Brian Norris <computersforpeace@gmail.com> | 2014-12-10 01:39:18 -0800 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-12-15 13:46:20 -0500 |
| commit | 1d240d370290445e08a35917700776db60ffe831 (patch) | |
| tree | a1325823a3e5b0e4a999260d4cf27356a98168b8 /drivers/net/wireless/brcm80211/brcmsmac/main.c | |
| parent | 8670d4d603794e643601707e9222df49a2430840 (diff) | |
| download | lwn-1d240d370290445e08a35917700776db60ffe831.tar.gz lwn-1d240d370290445e08a35917700776db60ffe831.zip | |
brcmsmac: don't leak kernel memory via printk()
Debug code prints the fifo name via custom dev_warn() wrappers. The
fifo_names array is only non-zero when debugging is manually enabled,
which is all well and good. However, it's *not* good that this array
uses zero-length arrays in the non-debug case, and so it doesn't
actually have any memory allocated to it. This means that as far as we
know, fifo_names[i] actually points to garbage memory.
I've seen this in my log:
[ 4601.205511] brcmsmac bcma0:1: wl0: brcms_c_d11hdrs_mac80211: �GeL txop exceeded phylen 137/256 dur 1602/1504
So let's give this array space enough to fill it with a NULL byte.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Brett Rudley <brudley@broadcom.com>
Cc: Arend van Spriel <arend@broadcom.com>
Cc: "Franky (Zhenhui) Lin" <frankyl@broadcom.com>
Cc: Hante Meuleman <meuleman@broadcom.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: linux-wireless@vger.kernel.org
Cc: brcm80211-dev-list@broadcom.com
Cc: netdev@vger.kernel.org
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/brcm80211/brcmsmac/main.c')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmsmac/main.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmsmac/main.c b/drivers/net/wireless/brcm80211/brcmsmac/main.c index a104d7ac3796..eb8584a9c49a 100644 --- a/drivers/net/wireless/brcm80211/brcmsmac/main.c +++ b/drivers/net/wireless/brcm80211/brcmsmac/main.c @@ -316,7 +316,7 @@ static const u16 xmtfifo_sz[][NFIFO] = { static const char * const fifo_names[] = { "AC_BK", "AC_BE", "AC_VI", "AC_VO", "BCMC", "ATIM" }; #else -static const char fifo_names[6][0]; +static const char fifo_names[6][1]; #endif #ifdef DEBUG |