CVE-2022-49094

In the Linux kernel, the following vulnerability has been resolved:

net/tls: fix slab-out-of-bounds bug in decrypt_internal

The memory size of tlsctx->rx.iv for AES128-CCM is 12 setting in tlssetswoffload(). The return value of cryptoaeadivsize() for "ccm(aes)" is 16. So memcpy() require 16 bytes from 12 bytes memory space will trigger slab-out-of-bounds bug as following:

================================================================== BUG: KASAN: slab-out-of-bounds in decrypt_internal+0x385/0xc40 [tls] Read of size 16 at addr ffff888114e84e60 by task tls/10911

Call Trace: <TASK> dumpstacklvl+0x34/0x44 printreport.cold+0x5e/0x5db ? decryptinternal+0x385/0xc40 [tls] kasanreport+0xab/0x120 ? decryptinternal+0x385/0xc40 [tls] kasancheckrange+0xf9/0x1e0 memcpy+0x20/0x60 decryptinternal+0x385/0xc40 [tls] ? tlsgetrec+0x2e0/0x2e0 [tls] ? processrxlist+0x1a5/0x420 [tls] ? tlssetupfromiter.constprop.0+0x2e0/0x2e0 [tls] decryptskbupdate+0x9d/0x400 [tls] tlsswrecvmsg+0x3c8/0xb50 [tls]

Allocated by task 10911: kasansavestack+0x1e/0x40 __kasankmalloc+0x81/0xa0 tlsset_swoffload+0x2eb/0xa20 [tls] tlssetsockopt+0x68c/0x700 [tls] _syssetsockopt+0xfe/0x1b0

Replace the cryptoaeadivsize() with prot->ivsize + prot->saltsize when memcpy() iv value in TLS13_VERSION scenario.