CVE-2023-53344 can: bcm: bcm_tx_setup(): fix KMSAN uninit-value in vfs_write

In the Linux kernel, the following vulnerability has been resolved: can: bcm: bcmtxsetup: fix KMSAN uninit-value in vfswrite Syzkaller reported the following issue: ===================================================== BUG: KMSAN: uninit-value in aiorwdone fs/aio.c:1520 inline BUG: KMSAN:...