Re: buffer overflows in the tty flip buffer in 2.6.17

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Mockern napsal(a):
When data is received from the hardware, it needs to be placed into the tty device's flip buffer. This can be done with the following bit of code:


for (i = 0; i < data_size; ++i) {
        if (tty->flip.count >= TTY_FLIPBUF_SIZE)
                tty_flip_buffer_push(tty);
        tty_insert_flip_char(tty, data[i], 0);
}
tty_flip_buffer_push(tty);

size = tty_buffer_request_room(tty, data_size);
tty_insert_flip_string(tty, data, min(data_size, size));
tty_flip_buffer_push(tty);
+ cope with size < data_size (some data_size -= size with 3 lines above in do {} while (data_size))

regards,
--
http://www.fi.muni.cz/~xslaby/            Jiri Slaby
faculty of informatics, masaryk university, brno, cz
e-mail: jirislaby gmail com, gpg pubkey fingerprint:
B674 9967 0407 CE62 ACC8  22A0 32CC 55C3 39D4 7A7E

Hnus <[email protected]> is an alias for /dev/null
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux