This is a note to let you know that I've just added the patch titled

staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()

to my staging git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git in the staging-testing branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will be merged to the staging-next branch sometime soon, after it passes testing, and the merge window is open.

If you have any questions about this process, please let me know.

From bc10916e890948d8927a5c8c40fb5dc44be5e1b8 Mon Sep 17 00:00:00 2001 From: Denis Efremov denis.e.efremov@oracle.com Date: Wed, 18 May 2022 11:00:52 +0400 Subject: staging: r8188eu: prevent ->Ssid overflow in rtw_wx_set_scan()

This code has a check to prevent read overflow but it needs another check to prevent writing beyond the end of the ->Ssid[] array.

Fixes: 2b42bd58b321 ("staging: r8188eu: introduce new os_dep dir for RTL8188eu driver") Cc: stable stable@vger.kernel.org Signed-off-by: Denis Efremov denis.e.efremov@oracle.com Link: https://lore.kernel.org/r/20220518070052.108287-1-denis.e.efremov@oracle.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/staging/r8188eu/os_dep/ioctl_linux.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/r8188eu/os_dep/ioctl_linux.c b/drivers/staging/r8188eu/os_dep/ioctl_linux.c index a802c1e7b456..9c1f576e067a 100644 --- a/drivers/staging/r8188eu/os_dep/ioctl_linux.c +++ b/drivers/staging/r8188eu/os_dep/ioctl_linux.c @@ -1131,9 +1131,11 @@ static int rtw_wx_set_scan(struct net_device *dev, struct iw_request_info *a, break; } sec_len = *(pos++); len -= 1; - if (sec_len > 0 && sec_len <= len) { + if (sec_len > 0 && + sec_len <= len && + sec_len <= 32) { ssid[ssid_index].SsidLength = sec_len; - memcpy(ssid[ssid_index].Ssid, pos, ssid[ssid_index].SsidLength); + memcpy(ssid[ssid_index].Ssid, pos, sec_len); ssid_index++; } pos += sec_len;