Merge branch 'atm-fix-uninit-and-mem-accounting-leak-in-vcc_sendmsg'

Kuniyuki Iwashima says:

====================
atm: Fix uninit and mem accounting leak in vcc_sendmsg().

Patch 1 fixes uninit issue reported by KMSAN, and patch 2 fixes
another issue found by Simon Horman during review for v1 patch.

v1: https://lore.kernel.org/20250613055700.415596-1-kuni1840@gmail.com
====================

Link: https://patch.msgid.link/20250616182147.963333-1-kuni1840@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>