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Bluetooth: increase BTNAMSIZ to 21 chars to fix potential buffer overflow

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[ Upstream commit 713baf3dae8f45dc8ada4ed2f5fdcbf94a5c274d ]

An earlier commit replaced using batostr to using %pMR sprintf for the
construction of session->name. Static analysis detected that this new
method can use a total of 21 characters (including the trailing '\0')
so we need to increase the BTNAMSIZ from 18 to 21 to fix potential
buffer overflows.

Addresses-Coverity: ("Out-of-bounds write")
Fixes: fcb73338ed ("Bluetooth: Use %pMR in sprintf/seq_printf instead of batostr")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Colin Ian King 2021-08-04 16:09:51 +01:00 • committed by Greg Kroah-Hartman
commit 5537dc810b
1 changed files with 1 additions and 1 deletions
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2
net/bluetooth/cmtp/cmtp.h
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@ -26,7 +26,7 @@
#include <linux/types.h>
#include <net/bluetooth/bluetooth.h>
#define BTNAMSIZ 18
#define BTNAMSIZ 21
/* CMTP ioctl defines */
#define CMTPCONNADD _IOW('C', 200, int)