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authorPavel Skripkin <paskripkin@gmail.com>2022-01-07 01:57:16 +0300
committerJakub Kicinski <kuba@kernel.org>2022-01-10 03:35:50 +0300
commitd668769eb9c52b150753f1653f7f5a0aeb8239d2 (patch)
treed7187210c707f5b0b4d76aee6c9fa484629310bf /drivers/net/amt.c
parent6f022c2ddbcefaee79502ce5386dfe351d457070 (diff)
downloadlinux-d668769eb9c52b150753f1653f7f5a0aeb8239d2.tar.xz
net: mcs7830: handle usb read errors properly
Syzbot reported uninit value in mcs7830_bind(). The problem was in missing validation check for bytes read via usbnet_read_cmd(). usbnet_read_cmd() internally calls usb_control_msg(), that returns number of bytes read. Code should validate that requested number of bytes was actually read. So, this patch adds missing size validation check inside mcs7830_get_reg() to prevent uninit value bugs Reported-and-tested-by: syzbot+003c0a286b9af5412510@syzkaller.appspotmail.com Fixes: 2a36d7083438 ("USB: driver for mcs7830 (aka DeLOCK) USB ethernet adapter") Signed-off-by: Pavel Skripkin <paskripkin@gmail.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Link: https://lore.kernel.org/r/20220106225716.7425-1-paskripkin@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/amt.c')
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