[PATCH] fs/coredump: open coredump file in O_WRONLY instead of O_RDWR

[Vladimir Sementsov-Ogievskiy]

This makes it possible to make stricter apparmor profile and don't
allow the program to read any coredump in the system.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@xxxxxxxxxxxxxx>
---
 fs/coredump.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/coredump.c b/fs/coredump.c
index 5df1e6e1eb2b..8f263a389175 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -646,7 +646,7 @@ void do_coredump(const kernel_siginfo_t *siginfo)
 	} else {
 		struct mnt_idmap *idmap;
 		struct inode *inode;
-		int open_flags = O_CREAT | O_RDWR | O_NOFOLLOW |
+		int open_flags = O_CREAT | O_WRONLY | O_NOFOLLOW |
 				 O_LARGEFILE | O_EXCL;
 
 		if (cprm.limit < binfmt->min_coredump)
-- 
2.34.1