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| author | Cyrill Gorcunov <gorcunov@openvz.org> | 2012-03-15 15:17:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-15 17:03:03 -0700 |
| commit | 79f0713d403c800db9d89134e2fd7f846e68d6ee (patch) | |
| tree | 0c59c69742d70080f08d3c42febdf51b8db236ad | |
| parent | 9bbad7da76b3dd578fb55c862624366a8c9ccd22 (diff) | |
| download | op-kernel-dev-79f0713d403c800db9d89134e2fd7f846e68d6ee.zip op-kernel-dev-79f0713d403c800db9d89134e2fd7f846e68d6ee.tar.gz | |
prctl: use CAP_SYS_RESOURCE for PR_SET_MM option
CAP_SYS_ADMIN is already overloaded left and right, so to have more
fine-grained access control use CAP_SYS_RESOURCE here.
The CAP_SYS_RESOUCE is chosen because this prctl option allows a current
process to adjust some fields of memory map descriptor which rather
represents what the process owns: pointers to code, data, stack
segments, command line, auxiliary vector data and etc.
Suggested-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Kees Cook <keescook@chromium.org>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | kernel/sys.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 4070153..888d227 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1706,7 +1706,7 @@ static int prctl_set_mm(int opt, unsigned long addr, if (arg4 | arg5) return -EINVAL; - if (!capable(CAP_SYS_ADMIN)) + if (!capable(CAP_SYS_RESOURCE)) return -EPERM; if (addr >= TASK_SIZE) |
