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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2006-08-27 10:23:28 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-27 20:01:28 +0200 |
| commit | a2e0b56316fa90e137802fdad6a7c6a9b85c86c3 (patch) | |
| tree | b9ea6534c1e1e1dd6a0e24bdadebc9e4be147590 /Documentation/sysctl/fs.txt | |
| parent | [PATCH] tty: remove bogus call to cdev_del() (diff) | |
| download | linux-a2e0b56316fa90e137802fdad6a7c6a9b85c86c3.tar.xz linux-a2e0b56316fa90e137802fdad6a7c6a9b85c86c3.zip | |
[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.txt | 20 |
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 |