From: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Date: Mon, 3 Jul 2023 14:42:17 +0000 (+0200)
Subject: splice: fsnotify_access(fd)/fsnotify_modify(fd) in vmsplice
X-Git-Tag: v6.6.17~4154^2~33
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7f0f1ea069e52d5a16921abd59377a7da6c25149;p=platform%2Fkernel%2Flinux-rpi.git

splice: fsnotify_access(fd)/fsnotify_modify(fd) in vmsplice

Same logic applies here: this can fill up the pipe and pollers that rely
on getting IN_MODIFY notifications never wake up.

Fixes: 983652c69199 ("splice: report related fsnotify events")
Link: https://lore.kernel.org/linux-fsdevel/jbyihkyk5dtaohdwjyivambb2gffyjs3dodpofafnkkunxq7bu@jngkdxx65pux/t/#u
Link: https://bugs.debian.org/1039488
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Acked-by: Jan Kara <jack@suse.cz>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Message-Id: <8d9ad5acb9c5c1dd2376a2ff5da6ac3183115389.1688393619.git.nabijaczleweli@nabijaczleweli.xyz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
---

diff --git a/fs/splice.c b/fs/splice.c
index 016b0a8..2cb89f5 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1460,6 +1460,9 @@ static long vmsplice_to_user(struct file *file, struct iov_iter *iter,
 		pipe_unlock(pipe);
 	}
 
+	if (ret > 0)
+		fsnotify_access(file);
+
 	return ret;
 }
 
@@ -1489,8 +1492,10 @@ static long vmsplice_to_pipe(struct file *file, struct iov_iter *iter,
 	if (!ret)
 		ret = iter_to_pipe(iter, pipe, buf_flag);
 	pipe_unlock(pipe);
-	if (ret > 0)
+	if (ret > 0) {
 		wakeup_pipe_readers(pipe);
+		fsnotify_modify(file);
+	}
 	return ret;
 }