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Message-Id: <1356778810-20879-1-git-send-email-avagin@openvz.org> Date: Sat, 29 Dec 2012 15:00:10 +0400 From: Andrey Vagin <avagin@...nvz.org> To: linux-kernel@...r.kernel.org Cc: Andrey Vagin <avagin@...nvz.org>, Andrew Morton <akpm@...ux-foundation.org>, Kees Cook <keescook@...omium.org>, Cyrill Gorcunov <gorcunov@...nvz.org>, Serge Hallyn <serge.hallyn@...onical.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, Eric Paris <eparis@...hat.com>, James Morris <jmorris@...ei.org> Subject: [PATCH] prctl: fix validation of an address The address should be bigger than dac_mmap_min_addr, because a process with CAP_RAWIO can map a vma bellow mmap_min_addr. Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: Kees Cook <keescook@...omium.org> Cc: Cyrill Gorcunov <gorcunov@...nvz.org> Cc: Serge Hallyn <serge.hallyn@...onical.com> Cc: "Eric W. Biederman" <ebiederm@...ssion.com> Cc: Eric Paris <eparis@...hat.com> Cc: James Morris <jmorris@...ei.org> Signed-off-by: Andrey Vagin <avagin@...nvz.org> --- kernel/sys.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sys.c b/kernel/sys.c index 265b376..e0e1bbd 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -1868,7 +1868,7 @@ static int prctl_set_mm(int opt, unsigned long addr, if (opt == PR_SET_MM_EXE_FILE) return prctl_set_mm_exe_file(mm, (unsigned int)addr); - if (addr >= TASK_SIZE || addr < mmap_min_addr) + if (addr >= TASK_SIZE || addr < dac_mmap_min_addr) return -EINVAL; error = -EINVAL; -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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