diff options
| author | Dmitry Vyukov <dvyukov@google.com> | 2017-09-08 16:17:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-09-08 18:26:51 -0700 |
| commit | 7483e5d420d9d5aa1732c5efb0da59e095a8b24e (patch) | |
| tree | 65184563486601b0ef131c00a24793dc4c721fa8 | |
| parent | 229cf16d3c8ac2e9b082c223fd0e619dc8f62cc1 (diff) | |
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>
| -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 cd771993f96f..3f693a0f6f3e 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, }; |