1 files changed, 6 insertions, 0 deletions

diff --git a/fs/exec.c b/fs/exec.c
index 4ccaaa4b13b2..282240afe99e 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1780,6 +1780,12 @@ 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)