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(parent: f06fb54) | 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>
Fri, 10 Aug 2012 20:29:57 +0000 (13:29 -0700)
commitee8b593affdf893012e57f4c54a21984d1b0d92e
treef1c00109d602344142a66ecfa2bca504ce2387bdtree | snapshot
parentf06fb543c1d0cbd721250b72ee1244178a38aa9dcommit | diff
TTY: ttyprintk, don't touch behind tty->write_buf

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: stable@vger.kernel.org (everything maintained past v2.6.37)
Cc: Samo Pogacnik <samo_pogacnik@t-2.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/char/ttyprintk.c diff | blob | history
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