CVE-2022-48945

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

media: vivid: fix compose size exceed boundary

syzkaller found a bug:

BUG: unable to handle page fault for address: ffffc9000a3b1000 #PF: supervisor write access in kernel mode #PF: errorcode(0x0002) - not-present page PGD 100000067 P4D 100000067 PUD 10015f067 PMD 1121ca067 PTE 0 Oops: 0002 [#1] PREEMPT SMP CPU: 0 PID: 23489 Comm: vivid-000-vid-c Not tainted 6.1.0-rc1+ #512 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:memcpyerms+0x6/0x10 [...] Call Trace: <TASK> ? tpgfillplanebuffer+0x856/0x15b0 vividfillbuff+0x8ac/0x1110 vividthreadvidcaptick+0x361/0xc90 vividthreadvidcap+0x21a/0x3a0 kthread+0x143/0x180 retfrom_fork+0x1f/0x30 </TASK>

This is because we forget to check boundary after adjust compose->height int V4L2SELTGTCROP case. Add v4l2rectmapinside() to fix this problem for this case.