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(parent: 79abf50) | patch
TTY: ttyprintk, don't touch behind tty->write_buf
authorJiri Slaby <jslaby@suse.cz>
Tue, 7 Aug 2012 19:47:39 +0000 (21:47 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Sun, 7 Oct 2012 15:39:31 +0000 (08:39 -0700)
commit10b96fa9ff7a3607bb39548025cbad3009f7d587
tree6304a74501aaebab94bc0f4239c7b295299e9414tree | snapshot
parent79abf5039669ff6761d785d78b0c1767811b70aecommit | diff
TTY: ttyprintk, don't touch behind tty->write_buf

commit ee8b593affdf893012e57f4c54a21984d1b0d92e upstream.

If a user provides a buffer larger than a tty->write_buf chunk and
passes '\r' at the end of the buffer, we touch an out-of-bound memory.

Add a check there to prevent this.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Samo Pogacnik <samo_pogacnik@t-2.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/char/ttyprintk.c diff | blob | history
Linux kernel for KaRo TX COM modules