=====================================================
BUG: KMSAN: uninit-value in aio_rw_done fs/aio.c:1524 [inline]
BUG: KMSAN: uninit-value in aio_write+0x899/0x950 fs/aio.c:1605
 aio_rw_done fs/aio.c:1524 [inline]
 aio_write+0x899/0x950 fs/aio.c:1605
 io_submit_one+0x1e91/0x3be0 fs/aio.c:2024
 __do_sys_io_submit fs/aio.c:2083 [inline]
 __se_sys_io_submit+0x29d/0x790 fs/aio.c:2053
 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2053
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Uninit was created at:
 slab_post_alloc_hook+0x12d/0xb50 mm/slab.h:774
 slab_alloc_node mm/slub.c:3452 [inline]
 __kmem_cache_alloc_node+0x514/0x920 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc+0x11d/0x3b0 mm/slab_common.c:980
 kmalloc_array include/linux/slab.h:636 [inline]
 bcm_tx_setup+0x81a/0x29f0 net/can/bcm.c:930
 bcm_sendmsg+0x3aa/0xd00 net/can/bcm.c:1351
 sock_sendmsg_nosec net/socket.c:722 [inline]
 sock_sendmsg net/socket.c:745 [inline]
 sock_write_iter+0x4ac/0x660 net/socket.c:1136
 call_write_iter include/linux/fs.h:1851 [inline]
 aio_write+0x63a/0x950 fs/aio.c:1605
 io_submit_one+0x1e91/0x3be0 fs/aio.c:2024
 __do_sys_io_submit fs/aio.c:2083 [inline]
 __se_sys_io_submit+0x29d/0x790 fs/aio.c:2053
 __x64_sys_io_submit+0x92/0xd0 fs/aio.c:2053
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

CPU: 1 PID: 5574 Comm: syz-executor.0 Not tainted 6.3.0-rc1-syzkaller-00010-ge61893130d87-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
=====================================================