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-rw-r--r--Documentation/sysctl/kernel.txt20
1 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index 35159176997..9f11d36a8c1 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -49,6 +49,7 @@ show up in /proc/sys/kernel:
- shmmax [ sysv ipc ]
- shmmni
- stop-a [ SPARC only ]
+- suid_dumpable
- sysrq ==> Documentation/sysrq.txt
- tainted
- threads-max
@@ -300,6 +301,25 @@ kernel. This value defaults to SHMMAX.
==============================================================
+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.
+
+==============================================================
+
tainted:
Non-zero if the kernel has been tainted. Numeric values, which