From 2fc4c1fb61cb58d16b50424173a3a58b42ce4044 Mon Sep 17 00:00:00 2001 From: Colin Ian King Date: Wed, 4 Aug 2021 16:09:51 +0100 Subject: Bluetooth: increase BTNAMSIZ to 21 chars to fix potential buffer overflow [ 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: fcb73338ed53 ("Bluetooth: Use %pMR in sprintf/seq_printf instead of batostr") Signed-off-by: Colin Ian King Signed-off-by: Marcel Holtmann Signed-off-by: Sasha Levin --- net/bluetooth/cmtp/cmtp.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/bluetooth/cmtp') diff --git a/net/bluetooth/cmtp/cmtp.h b/net/bluetooth/cmtp/cmtp.h index c32638dddbf9..f6b9dc4e408f 100644 --- a/net/bluetooth/cmtp/cmtp.h +++ b/net/bluetooth/cmtp/cmtp.h @@ -26,7 +26,7 @@ #include #include -#define BTNAMSIZ 18 +#define BTNAMSIZ 21 /* CMTP ioctl defines */ #define CMTPCONNADD _IOW('C', 200, int) -- cgit v1.2.3