X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Fexec.c;h=282240afe99e5e223b1732c4c1b58245d90618d8;hb=64bd4b693f2d0b59673086e9c510068d5ad47cee;hp=4ccaaa4b13b229ec17456789ead9aad76c8078bf;hpb=86533e80e0a20ed1a676f9eeb2dde0fa5ff23276;p=linux-2.6

diff --git a/fs/exec.c b/fs/exec.c
index 4ccaaa4b13..282240afe9 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)