| From | gregkh@linuxfou ... | Subject | [PATCH 5.11 214/306] usbip: fix vudc to check for stream socket | Date | Mon, 15 Mar 2021 14:54:37 +0100 |
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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
From: Shuah Khan <skhan@linuxfoundation.org>
commit 6801854be94fe8819b3894979875ea31482f5658 upstream.
Fix usbip_sockfd_store() to validate the passed in file descriptor is a stream socket. If the file descriptor passed was a SOCK_DGRAM socket, sock_recvmsg() can't detect end of stream.
Cc: stable@vger.kernel.org Suggested-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org> Link: https://lore.kernel.org/r/387a670316002324113ac7ea1e8b53f4085d0c95.1615171203.git.skhan@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/usb/usbip/vudc_sysfs.c | 9 +++++++++ 1 file changed, 9 insertions(+)
--- a/drivers/usb/usbip/vudc_sysfs.c +++ b/drivers/usb/usbip/vudc_sysfs.c @@ -138,6 +138,13 @@ static ssize_t usbip_sockfd_store(struct goto unlock_ud; } + if (socket->type != SOCK_STREAM) { + dev_err(dev, "Expecting SOCK_STREAM - found %d", + socket->type); + ret = -EINVAL; + goto sock_err; + } + udc->ud.tcp_socket = socket; spin_unlock_irq(&udc->ud.lock); @@ -177,6 +184,8 @@ static ssize_t usbip_sockfd_store(struct return count; +sock_err: + sockfd_put(socket); unlock_ud: spin_unlock_irq(&udc->ud.lock); unlock:
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