TO: Masaki Ota <masaki....@jp.alps.com>
CC: Dmitry Torokhov <dmitry.torok...@gmail.com>
tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head: a897436e0e233e84b664bb7f33c4e0d4d3e3bdad
commit: 3db5b9f782b50a309fe0fb89fb890f6b4f66d9ae [9220/10050] Input: ALPS - add
support for SS4 touchpad devices
:::::: branch date: 43 minutes ago
:::::: commit date: 20 hours ago
drivers/input/mouse/alps.c:961 alps_get_mt_count() error: buffer overflow 'mt'
2 <= 3
drivers/input/mouse/alps.c:961 alps_get_mt_count() error: buffer overflow 'mt'
2 <= 3
git remote add next
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
git remote update next
git checkout 3db5b9f782b50a309fe0fb89fb890f6b4f66d9ae
vim +/mt +961 drivers/input/mouse/alps.c
3808843c Yunkang Tang 2014-07-26 945 case V7_PACKET_ID_NEW:
3808843c Yunkang Tang 2014-07-26 946 mt[1].x &= ~0x003F;
3808843c Yunkang Tang 2014-07-26 947 mt[1].x |= (pkt[0] &
0x20);
3808843c Yunkang Tang 2014-07-26 948 mt[1].y |= 0x000F;
3808843c Yunkang Tang 2014-07-26 949 break;
3808843c Yunkang Tang 2014-07-26 950 }
3808843c Yunkang Tang 2014-07-26 951
3808843c Yunkang Tang 2014-07-26 952 mt[0].y = 0x7FF - mt[0].y;
3808843c Yunkang Tang 2014-07-26 953 mt[1].y = 0x7FF - mt[1].y;
3808843c Yunkang Tang 2014-07-26 954 }
3808843c Yunkang Tang 2014-07-26 955
3808843c Yunkang Tang 2014-07-26 956 static int alps_get_mt_count(struct
input_mt_pos *mt)
3808843c Yunkang Tang 2014-07-26 957 {
7091c443 Hans de Goede 2014-12-18 958 int i, fingers = 0;
3808843c Yunkang Tang 2014-07-26 959
7091c443 Hans de Goede 2014-12-18 960 for (i = 0; i < MAX_TOUCHES;
i++) {
7091c443 Hans de Goede 2014-12-18 @961 if (mt[i].x != 0 ||
mt[i].y != 0)
7091c443 Hans de Goede 2014-12-18 962 fingers++;
7091c443 Hans de Goede 2014-12-18 963 }
3808843c Yunkang Tang 2014-07-26 964
7091c443 Hans de Goede 2014-12-18 965 return fingers;
3808843c Yunkang Tang 2014-07-26 966 }
3808843c Yunkang Tang 2014-07-26 967
3808843c Yunkang Tang 2014-07-26 968 static int alps_decode_packet_v7(struct
alps_fields *f,
3808843c Yunkang Tang 2014-07-26 969
unsigned char *p,
:::::: The code at line 961 was first introduced by commit
:::::: 7091c443dda8c6c6d8e70e33452252f9ad3e7814 Input: alps - v7: sometimes a
single touch is reported in mt[1]
:::::: TO: Hans de Goede <hdego...@redhat.com>
:::::: CC: Dmitry Torokhov <dmitry.torok...@gmail.com>
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