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Fix IPC buffer size check

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pjht 2019-09-01 13:01:37 -05:00
parent 148900a832
commit f8160bb3ee
1 changed files with 2 additions and 1 deletions
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3
kernel/cpu/i386/mailboxes.c
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@ -65,10 +65,11 @@ void kernel_mailbox_get_msg(uint32_t box, Message* recv_msg, uint32_t buffer_sz)
recv_msg->from=mailbox.msg_store[mailbox.rd].from;
recv_msg->to=mailbox.msg_store[mailbox.rd].to;
recv_msg->size=mailbox.msg_store[mailbox.rd].size;
if (buffer_sz>mailbox.msg_store[mailbox.rd].size) {
if (buffer_sz<mailbox.msg_store[mailbox.rd].size) {
recv_msg->size=mailbox.msg_store[mailbox.rd].size;
recv_msg->from=0;
serial_printf("Box %d attempted to get the message from box %d, but the buffer was too small.\n",box,mailbox.msg_store[mailbox.rd].from);
serial_printf("The message size is %d, and the buffer size is %d.\n",mailbox.msg_store[mailbox.rd].size,buffer_sz);
mailboxes[box]=mailbox;
return;
}