From: Tobin C. Harding Date: Tue, 19 Dec 2017 21:17:16 +0000 (+1100) Subject: doc: update kptr_restrict documentation X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=da271403a894f1139b3a49fca8fa19585902890e;p=openwrt%2Fstaging%2Fblogic.git 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 --- 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