net: hso: fix NULL-deref on disconnect regression
commit 2ad5692db72874f02b9ad551d26345437ea4f7f3 upstream.
Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device
unregistration") fixed the racy minor allocation reported by syzbot, but
introduced an unconditional NULL-pointer dereference on every disconnect
Specifically, the serial device table must no longer be accessed after
the minor has been released by hso_serial_tty_unregister().
Fixes: 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration")
Cc: Anirudh Rayabharam <firstname.lastname@example.org>
Reported-by: Leonardo Antoniazzi <email@example.com>
Signed-off-by: Johan Hovold <firstname.lastname@example.org>
Reviewed-by: Anirudh Rayabharam <email@example.com>
Signed-off-by: David S. Miller <firstname.lastname@example.org>
Signed-off-by: Greg Kroah-Hartman <email@example.com>
1 file changed