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(parent: 0950902) | 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 15:27:25 +0000 (08:27 -0700)
commit63959b0e2174f0006f2cdbc7fb06c09b033a0920
tree030c6d484d9f0262129bd86f97b6326e2d9d9cfbtree | snapshot
parent0950902e1cf419d6fa060ed5f59e7cecd2400028commit | 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
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