diff options
author | Dmitry Vyukov <dvyukov@google.com> | 2017-09-08 16:17:35 -0700 |
---|---|---|
committer | Paul Lawrence <paullawrence@google.com> | 2017-12-18 09:41:57 -0800 |
commit | b67f35bcaea1f2fef36166ac0663b0d3b543ed38 (patch) | |
tree | ca0338ab6d73f0ae3fd27229e45ea9acb6283d4f /kernel/kcov.c | |
parent | 937f71940a639524aa0b3fef56558892efe1ee8a (diff) |
UPSTREAM: kcov: support compat processes
Support compat processes in KCOV by providing compat_ioctl callback.
Compat mode uses the same ioctl callback: we have 2 commands that do not
use the argument and 1 that already checks that the arg does not overflow
INT_MAX. This allows to use KCOV-guided fuzzing in compat processes.
Link: http://lkml.kernel.org/r/20170823100553.55812-1-dvyukov@google.com
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: <syzkaller@googlegroups.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Bug: 64145065
(cherry-picked from 7483e5d420d9d5aa1732c5efb0da59e095a8b24e)
Change-Id:I74b62f01941091649ce6e88b3130e4ca4274a8de
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Diffstat (limited to 'kernel/kcov.c')
-rw-r--r-- | kernel/kcov.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/kcov.c b/kernel/kcov.c index c3fe46193a31..f348bcbea7d2 100644 --- a/kernel/kcov.c +++ b/kernel/kcov.c @@ -270,6 +270,7 @@ static long kcov_ioctl(struct file *filep, unsigned int cmd, unsigned long arg) static const struct file_operations kcov_fops = { .open = kcov_open, .unlocked_ioctl = kcov_ioctl, + .compat_ioctl = kcov_ioctl, .mmap = kcov_mmap, .release = kcov_close, }; |