From 91021bbf5cd38700312445e71a6cb1f1811c480c Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 17 Dec 2007 21:17:56 +0100 Subject: [PATCH] vfs: coredumping fix (CVE-2007-6206) vfs: coredumping fix patch c46f739dd39db3b07ab5deb4e3ec81e1c04a91af in mainline fix: http://bugzilla.kernel.org/show_bug.cgi?id=3043 only allow coredumping to the same uid that the coredumping task runs under. Signed-off-by: Ingo Molnar Acked-by: Alan Cox Acked-by: Christoph Hellwig Acked-by: Al Viro Signed-off-by: Linus Torvalds Cc: maximilian attems Signed-off-by: Greg Kroah-Hartman --- fs/exec.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/exec.c b/fs/exec.c index 3da429d42b200..224e973514bb6 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1561,6 +1561,12 @@ int do_coredump(long signr, int exit_code, struct pt_regs * regs) but keep the previous behaviour for now. */ if (!ispipe && !S_ISREG(inode->i_mode)) goto close_fail; + /* + * Dont allow local users get cute and trick others to coredump + * into their pre-created files: + */ + if (inode->i_uid != current->fsuid) + goto close_fail; if (!file->f_op) goto close_fail; if (!file->f_op->write) -- 2.47.2