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lockdown: Print current->comm in restriction messages

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Print the content of current->comm in messages generated by lockdown to
indicate a restriction that was hit.  This makes it a bit easier to find
out what caused the message.

The message now patterned something like:

        Lockdown: <comm>: <what> is restricted; see man kernel_lockdown.7

Signed-off-by: David Howells <[email protected]>
Signed-off-by: Matthew Garrett <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Signed-off-by: James Morris <[email protected]>
This commit is contained in:
Matthew Garrett 2019-08-19 17:18:05 -07:00 • committed by James Morris
commit b602614a81
2 changed files with 9 additions and 4 deletions
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5
fs/proc/kcore.c
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@ -548,11 +548,12 @@ static int open_kcore(struct inode *inode, struct file *filp)
{
int ret = security_locked_down(LOCKDOWN_KCORE);
if (ret)
return ret;
if (!capable(CAP_SYS_RAWIO))
return -EPERM;
if (ret)
return ret;
filp->private_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!filp->private_data)
return -ENOMEM;