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| author | Tobin C. Harding <me@tobin.cc> | 2017-12-19 22:17:16 +0100 |
|---|---|---|
| committer | Jonathan Corbet <corbet@lwn.net> | 2017-12-21 21:39:27 +0100 |
| commit | da271403a894f1139b3a49fca8fa19585902890e (patch) | |
| tree | f8cb14c69db67ebf16d6807bd36bd88008b793ba | |
| parent | doc: convert printk-formats.txt to rst (diff) | |
| download | linux-da271403a894f1139b3a49fca8fa19585902890e.tar.xz linux-da271403a894f1139b3a49fca8fa19585902890e.zip | |
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 <me@tobin.cc>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
| -rw-r--r-- | Documentation/sysctl/kernel.txt | 3 |
1 files changed, 2 insertions, 1 deletions
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 |