bump version to 5.15.19-3

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>

Makefile

@@ -6,7 +6,7 @@ KERNEL_PATCHLEVEL=19
 # rebuild packages with new KREL and run 'make abiupdate'
 KREL=2
 
-PKGREL=2
+PKGREL=3
 
 KERNEL_MAJMIN=$(KERNEL_MAJ).$(KERNEL_MIN)
 KERNEL_VER=$(KERNEL_MAJMIN).$(KERNEL_PATCHLEVEL)

debian/changelog

@@ -1,3 +1,10 @@
+pve-kernel (5.15.19-3) bullseye; urgency=medium
+
+  * backport "lib/iov_iter: initialize "flags" in new pipe_buffer"
+    fixing CVE-2022-0847 "dirty pipe"
+
+ -- Proxmox Support Team <support@proxmox.com>  Mon, 07 Mar 2022 16:23:02 +0100
+
 pve-kernel (5.15.19-2) bullseye; urgency=medium
 
   * backport fbdev memory region release improvements

patches/kernel/0014-lib-iov_iter-initialize-flags-in-new-pipe_buffer.patch

@@ -0,0 +1,44 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Max Kellermann <max.kellermann@ionos.com>
+Date: Mon, 21 Feb 2022 11:03:13 +0100
+Subject: [PATCH] lib/iov_iter: initialize "flags" in new pipe_buffer
+
+commit 9d2231c5d74e13b2a0546fee6737ee4446017903 upstream.
+
+The functions copy_page_to_iter_pipe() and push_pipe() can both
+allocate a new pipe_buffer, but the "flags" member initializer is
+missing.
+
+Fixes: 241699cd72a8 ("new iov_iter flavour: pipe-backed")
+To: Alexander Viro <viro@zeniv.linux.org.uk>
+To: linux-fsdevel@vger.kernel.org
+To: linux-kernel@vger.kernel.org
+Cc: stable@vger.kernel.org
+Signed-off-by: Max Kellermann <max.kellermann@ionos.com>
+Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
+---
+ lib/iov_iter.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/lib/iov_iter.c b/lib/iov_iter.c
+index 9ffa7dc197be..fa5827e2e9a3 100644
+--- a/lib/iov_iter.c
++++ b/lib/iov_iter.c
+@@ -449,6 +449,7 @@ static size_t copy_page_to_iter_pipe(struct page *page, size_t offset, size_t by
+ 		return 0;
+ 
+ 	buf->ops = &page_cache_pipe_buf_ops;
++	buf->flags = 0;
+ 	get_page(page);
+ 	buf->page = page;
+ 	buf->offset = offset;
+@@ -564,6 +565,7 @@ static size_t push_pipe(struct iov_iter *i, size_t size,
+ 			break;
+ 
+ 		buf->ops = &default_pipe_buf_ops;
++		buf->flags = 0;
+ 		buf->page = page;
+ 		buf->offset = 0;
+ 		buf->len = min_t(ssize_t, left, PAGE_SIZE);