commit
7bc2b55a5c030685b399bb65b6baa9ccc3d1f167 upstream.
We need to put an upper bound on "user_len" so the memcpy() doesn't
overflow.
Reported-by: Marco Grassi <marco.gra@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
[bwh: Backported to 3.2:
- Adjust context
- Use literal 1032 insetad of ARCMSR_API_DATA_BUFLEN]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
unsigned char *ver_addr;
case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
unsigned char *ver_addr;
- int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex;
+ uint32_t user_len;
+ int32_t my_empty_len, wqbuf_firstindex, wqbuf_lastindex;
uint8_t *pQbuffer, *ptmpuserbuffer;
ver_addr = kmalloc(1032, GFP_ATOMIC);
uint8_t *pQbuffer, *ptmpuserbuffer;
ver_addr = kmalloc(1032, GFP_ATOMIC);
}
ptmpuserbuffer = ver_addr;
user_len = pcmdmessagefld->cmdmessage.Length;
}
ptmpuserbuffer = ver_addr;
user_len = pcmdmessagefld->cmdmessage.Length;
+ if (user_len > 1032) {
+ retvalue = ARCMSR_MESSAGE_FAIL;
+ kfree(ver_addr);
+ goto message_out;
+ }
memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
wqbuf_lastindex = acb->wqbuf_lastindex;
wqbuf_firstindex = acb->wqbuf_firstindex;
memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len);
wqbuf_lastindex = acb->wqbuf_lastindex;
wqbuf_firstindex = acb->wqbuf_firstindex;