4.4-stable patches

added patches:
	fs-add-the-fsnotify-call-to-vfs_iter_write.patch

diff --git a/queue-4.4/fs-add-the-fsnotify-call-to-vfs_iter_write.patch b/queue-4.4/fs-add-the-fsnotify-call-to-vfs_iter_write.patch
new file mode 100644 (file)
index 0000000..ffdb110
--- /dev/null
+++ b/queue-4.4/fs-add-the-fsnotify-call-to-vfs_iter_write.patch
@@ -0,0 +1,67 @@
+From jdw@amazon.de  Thu Jan 31 16:05:54 2019
+From: Jimmy Durand Wesolowski <jdw@amazon.de>
+Date: Thu, 31 Jan 2019 15:19:39 +0100
+Subject: fs: add the fsnotify call to vfs_iter_write
+To: stable@vger.kernel.org
+Cc: David Woodhouse <dwmw@amazon.co.uk>, Amit Shah <aams@amazon.de>, Stefan Nuernberger <snu@amazon.de>, Frank Becker <becke@amazon.de>, Jimmy Durand Wesolowski <jdw@amazon.de>
+Message-ID: <1548944379-21257-1-git-send-email-jdw@amazon.de>
+
+From: Jimmy Durand Wesolowski <jdw@amazon.de>
+
+A bug has been discovered when redirecting splice output to regular files
+on EXT4 and tmpfs. Other filesystems might be affected.
+This commit fixes the issue for stable series kernel, using one of the
+change introduced during the rewrite and refactoring of vfs_iter_write in
+4.13, specifically in the
+commit abbb65899aec ("fs: implement vfs_iter_write using do_iter_write").
+
+This issue affects v4.4 and v4.9 stable series of kernels.
+
+Without this fix for v4.4 and v4.9 stable, the following upstream commits
+(and their dependencies would need to be backported):
+* commit abbb65899aec ("fs: implement vfs_iter_write using do_iter_write")
+* commit 18e9710ee59c ("fs: implement vfs_iter_read using do_iter_read")
+* commit edab5fe38c2c
+  ("fs: move more code into do_iter_read/do_iter_write")
+* commit 19c735868dd0 ("fs: remove __do_readv_writev")
+* commit 26c87fb7d10d ("fs: remove do_compat_readv_writev")
+* commit 251b42a1dc64 ("fs: remove do_readv_writev")
+
+as well as the following dependencies:
+* commit bb7462b6fd64
+  ("vfs: use helpers for calling f_op->{read,write}_iter()")
+* commit 0f78d06ac1e9
+  ("vfs: pass type instead of fn to do_{loop,iter}_readv_writev()")
+* commit 7687a7a4435f
+  ("vfs: extract common parts of {compat_,}do_readv_writev()")
+
+In order to reduce the changes, this commit uses only the part of
+commit abbb65899aec ("fs: implement vfs_iter_write using do_iter_write")
+that fixes the issue.
+
+This issue and the reproducer can be found on
+https://bugzilla.kernel.org/show_bug.cgi?id=85381
+
+Reported-by: Richard Li <richardpku@gmail.com>
+Reported-by: Chad Miller <millchad@amazon.com>
+Reviewed-by: Stefan Nuernberger <snu@amazon.de>
+Reviewed-by: Frank Becker <becke@amazon.de>
+Signed-off-by: Jimmy Durand Wesolowski <jdw@amazon.de>
+---
+ fs/read_write.c |    4 +++-
+ 1 file changed, 3 insertions(+), 1 deletion(-)
+
+--- a/fs/read_write.c
++++ b/fs/read_write.c
+@@ -363,8 +363,10 @@ ssize_t vfs_iter_write(struct file *file
+       iter->type |= WRITE;
+       ret = file->f_op->write_iter(&kiocb, iter);
+       BUG_ON(ret == -EIOCBQUEUED);
+-      if (ret > 0)
++      if (ret > 0) {
+               *ppos = kiocb.ki_pos;
++              fsnotify_modify(file);
++      }
+       return ret;
+ }
+ EXPORT_SYMBOL(vfs_iter_write);

diff --git a/queue-4.4/series b/queue-4.4/series
index 6cbd3a3f1bbaacbbdd59e32855849fc4625e442f..73d4be3f1b1b5b02ba5502608c0e26446ec2c84c 100644 (file)
--- a/queue-4.4/series
+++ b/queue-4.4/series
@@ -30,3 +30,4 @@ f2fs-read-page-index-before-freeing.patch
 0002-Revert-loop-Get-rid-of-loop_index_mutex.patch
 0003-Revert-loop-Fold-__loop_release-into-loop_release.patch
 s390-smp-fix-calling-smp_call_ipl_cpu-from-ipl-cpu.patch
+fs-add-the-fsnotify-call-to-vfs_iter_write.patch