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BUG: KCSAN: data-race in random_recv_done / virtio_read

write to 0xffff888100a3d0cc of 4 bytes by interrupt on cpu 1:
 random_recv_done+0x58/0x80 drivers/char/hw_random/virtio-rng.c:45
 vring_interrupt+0x15d/0x180 drivers/virtio/virtio_ring.c:2163
 __handle_irq_event_percpu+0x93/0x480 kernel/irq/handle.c:158
 handle_irq_event_percpu kernel/irq/handle.c:198 [inline]
 handle_irq_event+0x9a/0x150 kernel/irq/handle.c:215
 handle_edge_irq+0x18e/0x5f0 kernel/irq/chip.c:822
 generic_handle_irq_desc include/linux/irqdesc.h:158 [inline]
 handle_irq arch/x86/kernel/irq.c:231 [inline]
 __common_interrupt+0x60/0x100 arch/x86/kernel/irq.c:250
 common_interrupt+0x9a/0xc0 arch/x86/kernel/irq.c:240
 asm_common_interrupt+0x1e/0x40
 __sanitizer_cov_trace_pc+0x46/0x60 kernel/kcov.c:205
 sctp_v4_cmp_addr+0x66/0xb0 net/sctp/protocol.c:304
 sctp_bind_addr_state+0x7c/0x100 net/sctp/bind_addr.c:407
 sctp_copy_local_addr_list+0x176/0x230 net/sctp/protocol.c:162
 sctp_copy_one_addr+0x7d/0x3f0 net/sctp/bind_addr.c:460
 sctp_bind_addr_copy+0x11e/0x280 net/sctp/bind_addr.c:68
 sctp_assoc_set_bind_addr_from_ep+0xbc/0xd0 net/sctp/associola.c:1592
 sctp_connect_new_asoc+0x1cb/0x3a0 net/sctp/socket.c:1092
 __sctp_connect+0x416/0xa80 net/sctp/socket.c:1194
 sctp_connect net/sctp/socket.c:4808 [inline]
 sctp_inet_connect+0xe1/0x100 net/sctp/socket.c:4823
 __sys_connect_file net/socket.c:1896 [inline]
 __sys_connect+0x197/0x1b0 net/socket.c:1913
 __do_sys_connect net/socket.c:1923 [inline]
 __se_sys_connect net/socket.c:1920 [inline]
 __x64_sys_connect+0x3d/0x50 net/socket.c:1920
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae

write to 0xffff888100a3d0cc of 4 bytes by task 7674 on cpu 0:
 request_entropy drivers/char/hw_random/virtio-rng.c:56 [inline]
 copy_data drivers/char/hw_random/virtio-rng.c:74 [inline]
 virtio_read+0x1a0/0x450 drivers/char/hw_random/virtio-rng.c:92
 rng_get_data drivers/char/hw_random/core.c:192 [inline]
 rng_dev_read+0x1b4/0x630 drivers/char/hw_random/core.c:229
 loop_rw_iter+0x257/0x350
 io_iter_do_read fs/io_uring.c:3507 [inline]
 io_read fs/io_uring.c:3562 [inline]
 io_issue_sqe+0x5070/0x53b0 fs/io_uring.c:6675
 io_wq_submit_work+0x1c5/0x370 fs/io_uring.c:6840
 io_worker_handle_work+0x4ca/0xbd0 fs/io-wq.c:576
 io_wqe_worker+0x1bc/0x4f0 fs/io-wq.c:632
 ret_from_fork+0x1f/0x30

value changed: 0x00000040 -> 0x00000000

Reported by Kernel Concurrency Sanitizer on:
CPU: 0 PID: 7674 Comm: iou-wrk-7673 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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