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authorAlexey Dobriyan <adobriyan@gmail.com>2006-08-27 01:23:28 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-08-27 11:01:28 -0700
commita2e0b56316fa90e137802fdad6a7c6a9b85c86c3 (patch)
treeb9ea6534c1e1e1dd6a0e24bdadebc9e4be147590 /Documentation/sysctl/fs.txt
parentcc36e7f124da139a819ad316c39d9dbcb5ba1897 (diff)
[PATCH] Fix docs for fs.suid_dumpable
Sergey Vlasov noticed that there is not kernel.suid_dumpable, but fs.suid_dumpable. How KERN_SETUID_DUMPABLE ended up in fs_table[]? Hell knows... Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'Documentation/sysctl/fs.txt')
-rw-r--r--Documentation/sysctl/fs.txt20
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/sysctl/fs.txt b/Documentation/sysctl/fs.txt
index 0b62c62142cf..5c3a51905969 100644
--- a/Documentation/sysctl/fs.txt
+++ b/Documentation/sysctl/fs.txt
@@ -25,6 +25,7 @@ Currently, these files are in /proc/sys/fs:
- inode-state
- overflowuid
- overflowgid
+- suid_dumpable
- super-max
- super-nr
@@ -131,6 +132,25 @@ The default is 65534.
==============================================================
+suid_dumpable:
+
+This value can be used to query and set the core dump mode for setuid
+or otherwise protected/tainted binaries. The modes are
+
+0 - (default) - traditional behaviour. Any process which has changed
+ privilege levels or is execute only will not be dumped
+1 - (debug) - all processes dump core when possible. The core dump is
+ owned by the current user and no security is applied. This is
+ intended for system debugging situations only. Ptrace is unchecked.
+2 - (suidsafe) - any binary which normally would not be dumped is dumped
+ readable by root only. This allows the end user to remove
+ such a dump but not access it directly. For security reasons
+ core dumps in this mode will not overwrite one another or
+ other files. This mode is appropriate when adminstrators are
+ attempting to debug problems in a normal environment.
+
+==============================================================
+
super-max & super-nr:
These numbers control the maximum number of superblocks, and