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Commit da271403 authored by Tobin C. Harding's avatar Tobin C. Harding Committed by Jonathan Corbet
Browse files

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: default avatarTobin C. Harding <me@tobin.cc>
Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent b3ed2321

Documentation/sysctl/kernel.txt

+2 −1
Original line number Original line Diff line number Diff line
@@ -391,7 +391,8 @@ kptr_restrict: 
This toggle indicates whether restrictions are placed on

This toggle indicates whether restrictions are placed on

exposing kernel addresses via /proc and other interfaces.

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

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

format specifier will be replaced with 0's unless the user has CAP_SYSLOG