Bug 6145

Summary:	kernel.suid_dumpable sysctl is really fs.suid_dumpable
Product:	Process Management	Reporter:	Sergey Vlasov (vsu)
Component:	Other	Assignee:	Diego Calleja (diegocg)
Status:	CLOSED CODE_FIX
Severity:	normal
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.14, 2.6.16-rc5	Subsystem:
Regression:	---	Bisected commit-id:

Description Sergey Vlasov 2006-03-01 08:45:19 UTC

The sysctl option to enable core dumps for suid processes is described in
Documentation/sysctl/kernel.txt as kernel.suid_dumpable; however, it does not work:

$ /sbin/sysctl kernel.suid_dumpable
error: "kernel.suid_dumpable" is an unknown key
$ cat /proc/sys/kernel/suid_dumpable
cat: /proc/sys/kernel/suid_dumpable: No such file or directory

Source inspection has shown that the option was really placed under "fs":

$ /sbin/sysctl fs.suid_dumpable
fs.suid_dumpable = 0
$ cat /proc/sys/fs/suid_dumpable
0

However, both the documentation and include/linux/sysctl.h imply that the option
was intented to be placed under "kernel" (the numeric ID is named
KERN_SETUID_DUMPABLE).

How this should be fixed?  Should the sysctl option be moved from "fs" to
"kernel" (to agree with the documentation), or should the documentation and
numeric ID be changed to match the current implementation?

Comment 1 Andrew Morton 2006-03-01 12:52:42 UTC

We'd need to fix the documentation.  mail me a patch ;)

Comment 2 Alexey Dobriyan 2006-08-27 21:51:31 UTC

Fixed in mainline.