Wind River Support Network

Description

In the Linux kernel, the following vulnerability has been resolved:  dm: fix a buffer overflow in ioctl processing  Tony Asleson (using Claude) found a buffer overflow in dm-ioctl in the function retrieve_status:  1. The code in retrieve_status checks that the output string fits into    the output buffer and writes the output string there 2. Then, the code aligns the "outptr" variable to the next 8-byte    boundary: 	outptr = align_ptr(outptr); 3. The alignment doesn't check overflow, so outptr could point past the    buffer end 4. The "for" loop is iterated again, it executes: 	remaining = len - (outptr - outbuf); 5. If "outptr" points past "outbuf + len", the arithmetics wraps around    and the variable "remaining" contains unusually high number 6. With "remaining" being high, the code writes more data past the end of    the buffer  Luckily, this bug has no security implications because: 1. Only root can issue device mapper ioctls 2. The commonly used libraries that communicate with device mapper    (libdevmapper and devicemapper-rs) use buffer size that is aligned to    8 bytes - thus, "outptr = align_ptr(outptr)" can't overshoot the input    buffer and the bug can't happen accidentally