[PATCH v2 2/3] splice: fsnotify_modify(fd) in vmsplice

[Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx>]

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
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@xxxxxxxxxxxxxxxxxx>
---
 fs/splice.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/splice.c b/fs/splice.c
index 94fae24f9d54..a18274209dc1 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1447,6 +1447,9 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov,
 	else
 		error = vmsplice_to_user(f.file, &iter, flags);
 
+	if (error > 0)
+		fsnotify_modify(f.file);
+
 	kfree(iov);
 out_fdput:
 	fdput(f);
-- 
2.39.2

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