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commit260a9ad944upstream. The "ext->key_len" is a u16 that comes from the user. If it's over SCM_KEY_LEN (32) that could lead to memory corruption. Fixes:e0d369d1d9("[PATCH] ieee82011: Added WE-18 support to default wireless extension handler") Cc: stable@vger.kernel.org Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Stanislav Yakovlev <stas.yakovlev@gmail.com> Signed-off-by: Kalle Valo <kvalo@codeaurora.org> Link: https://lore.kernel.org/r/YHaoA1i+8uT4ir4h@mwanda Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>