coredump: call do_unlinkat directly instead of sys_unlink

And stop messing with the address limit.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 1 insertions, 6 deletions

diff --git a/fs/coredump.c b/fs/coredump.c
index 0eec03696707..cd72a4ca0cec 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -679,16 +679,11 @@ void do_coredump(const siginfo_t *siginfo)
                  * privs and don't want to unlink another user's coredump.
                  */
                 if (!need_suid_safe) {
-                        mm_segment_t old_fs;
-
-                        old_fs = get_fs();
-                        set_fs(KERNEL_DS);
                         /*
                          * If it doesn't exist, that's fine. If there's some
                          * other problem, we'll catch it at the filp_open().
                          */
-                        (void) sys_unlink((const char __user *)cn.corename);
-                        set_fs(old_fs);
+                        do_unlinkat(AT_FDCWD, getname_kernel(cn.corename));
                 }
 
                 /*