phy: renesas: rcar-gen3-usb2: Fix sysfs interface of "role"
commit 4bd5ead82d4b877ebe41daf95f28cda53205b039 upstream. Since the role_store() uses strncmp(), it's possible to refer out-of-memory if the sysfs data size is smaller than strlen("host"). This patch fixes it by using sysfs_streq() instead of strncmp(). Reported-by: NPavel Machek <pavel@denx.de> Fixes: 9bb86777 ("phy: rcar-gen3-usb2: add sysfs for usb role swap") Cc: <stable@vger.kernel.org> # v4.10+ Signed-off-by: NYoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be> Acked-by: NPavel Machek <pavel@denx.de> Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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