pjht/os
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix IPC buffer size check

Browse Source
This commit is contained in:
pjht 2019-09-01 13:01:37 -05:00
parent 148900a832
commit f8160bb3ee
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
kernel/cpu/i386/mailboxes.c
View File

@ -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->from=mailbox.msg_store[mailbox.rd].from;
recv_msg->to=mailbox.msg_store[mailbox.rd].to; recv_msg->to=mailbox.msg_store[mailbox.rd].to;
recv_msg->size=mailbox.msg_store[mailbox.rd].size; 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->size=mailbox.msg_store[mailbox.rd].size;
recv_msg->from=0; 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("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; mailboxes[box]=mailbox;
return; return;
} }