From da271403a894f1139b3a49fca8fa19585902890e Mon Sep 17 00:00:00 2001 From: "Tobin C. Harding" Date: Wed, 20 Dec 2017 08:17:16 +1100 Subject: doc: update kptr_restrict documentation Recently the behaviour of printk specifier %pK was changed. The documentation does not currently mirror this. Update documentation for sysctl kptr_restrict. Signed-off-by: Tobin C. Harding Signed-off-by: Jonathan Corbet --- Documentation/sysctl/kernel.txt | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'Documentation/sysctl') diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index 63663039acb7..412314eebda6 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -391,7 +391,8 @@ kptr_restrict: This toggle indicates whether restrictions are placed on exposing kernel addresses via /proc and other interfaces. -When kptr_restrict is set to (0), the default, there are no restrictions. +When kptr_restrict is set to 0 (the default) the address is hashed before +printing. (This is the equivalent to %p.) When kptr_restrict is set to (1), kernel pointers printed using the %pK format specifier will be replaced with 0's unless the user has CAP_SYSLOG -- cgit v1.2.3-58-ga151