]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
kernel/sys.c: avoid copying possible padding bytes in copy_to_user
authorJoe Perches <joe@perches.com>
Thu, 5 Dec 2019 00:50:53 +0000 (16:50 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 5 Dec 2019 03:44:12 +0000 (19:44 -0800)
commit5e1aada08cd19ea652b2d32a250501d09b02ff2e
treeb0722199d6d1f1b432a237e47f02cbb150f89dfa
parentef70eff9dea66f38f8c2c2dcc7fe4b7a2bbb4921
kernel/sys.c: avoid copying possible padding bytes in copy_to_user

Initialization is not guaranteed to zero padding bytes so use an
explicit memset instead to avoid leaking any kernel content in any
possible padding bytes.

Link: http://lkml.kernel.org/r/dfa331c00881d61c8ee51577a082d8bebd61805c.camel@perches.com
Signed-off-by: Joe Perches <joe@perches.com>
Cc: Dan Carpenter <error27@gmail.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/sys.c