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| author | Chen Gang <gang.chen@asianux.com> | 2013-02-21 16:43:06 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-02-21 17:22:20 -0800 |
| commit | 7fe5e04292e71af34ae171b88caa2a139e0b6125 (patch) | |
| tree | 5bae0bf98e77442626c61ad57d3121440d599f09 /kernel/sys.c | |
| parent | 242260fb858e99674289484bc2bfe3b41f9c4cbb (diff) | |
| download | lwn-7fe5e04292e71af34ae171b88caa2a139e0b6125.tar.gz lwn-7fe5e04292e71af34ae171b88caa2a139e0b6125.zip | |
sys_prctl(): arg2 is unsigned long which is never < 0
arg2 will never < 0, for its type is 'unsigned long'
Also, use the provided macros.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Reported-by: Cyrill Gorcunov <gorcunov@openvz.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/sys.c')
| -rw-r--r-- | kernel/sys.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/sys.c b/kernel/sys.c index 265b37690421..83261059676c 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -47,6 +47,7 @@ #include <linux/syscalls.h> #include <linux/kprobes.h> #include <linux/user_namespace.h> +#include <linux/binfmts.h> #include <linux/kmsg_dump.h> /* Move somewhere else to avoid recompiling? */ @@ -2026,7 +2027,8 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3, error = get_dumpable(me->mm); break; case PR_SET_DUMPABLE: - if (arg2 < 0 || arg2 > 1) { + if (arg2 != SUID_DUMP_DISABLE && + arg2 != SUID_DUMP_USER) { error = -EINVAL; break; } |