This is a note to let you know that I've just added the patch titled
io_uring/fs: consider link->flags when getting path for LINKAT
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
io_uring-fs-consider-link-flags-when-getting-path-for-linkat.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 8479063f1fbee201a8739130e816cc331b675838 Mon Sep 17 00:00:00 2001
From: Charles Mirabile <cmirabil@xxxxxxxxxx>
Date: Mon, 20 Nov 2023 05:55:45 -0500
Subject: io_uring/fs: consider link->flags when getting path for LINKAT
From: Charles Mirabile <cmirabil@xxxxxxxxxx>
commit 8479063f1fbee201a8739130e816cc331b675838 upstream.
In order for `AT_EMPTY_PATH` to work as expected, the fact
that the user wants that behavior needs to make it to `getname_flags`
or it will return ENOENT.
Fixes: cf30da90bc3a ("io_uring: add support for IORING_OP_LINKAT")
Cc: <stable@xxxxxxxxxxxxxxx>
Link: https://github.com/axboe/liburing/issues/995
Signed-off-by: Charles Mirabile <cmirabil@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231120105545.1209530-1-cmirabil@xxxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
io_uring/io_uring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -4049,7 +4049,7 @@ static int io_linkat_prep(struct io_kioc
newf = u64_to_user_ptr(READ_ONCE(sqe->addr2));
lnk->flags = READ_ONCE(sqe->hardlink_flags);
- lnk->oldpath = getname(oldf);
+ lnk->oldpath = getname_uflags(oldf, lnk->flags);
if (IS_ERR(lnk->oldpath))
return PTR_ERR(lnk->oldpath);
Patches currently in stable-queue which might be from cmirabil@xxxxxxxxxx are
queue-5.15/io_uring-fs-consider-link-flags-when-getting-path-for-linkat.patch
