| Subject | [PATCH 25/27] Lock down /proc/kcore | From | David Howells <> | Date | Thu, 19 Oct 2017 15:53:42 +0100 |
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Disallow access to /proc/kcore when the kernel is locked down to prevent access to cryptographic data.
Signed-off-by: David Howells <dhowells@redhat.com> ---
fs/proc/kcore.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c index 45629f4b5402..176cf749e650 100644 --- a/fs/proc/kcore.c +++ b/fs/proc/kcore.c @@ -549,6 +549,8 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos) static int open_kcore(struct inode *inode, struct file *filp) { + if (kernel_is_locked_down("/proc/kcore")) + return -EPERM; if (!capable(CAP_SYS_RAWIO)) return -EPERM;
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