releases/5.0.19/fuse-honor-rlimit_fsize-in-fuse_file_fallocate.patch

   1 From 0cbade024ba501313da3b7e5dd2a188a6bc491b5 Mon Sep 17 00:00:00 2001
   2 From: Liu Bo <bo.liu@linux.alibaba.com>
   3 Date: Thu, 18 Apr 2019 04:04:41 +0800
   4 Subject: fuse: honor RLIMIT_FSIZE in fuse_file_fallocate
   5
   6 From: Liu Bo <bo.liu@linux.alibaba.com>
   7
   8 commit 0cbade024ba501313da3b7e5dd2a188a6bc491b5 upstream.
   9
  10 fstests generic/228 reported this failure that fuse fallocate does not
  11 honor what 'ulimit -f' has set.
  12
  13 This adds the necessary inode_newsize_ok() check.
  14
  15 Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com>
  16 Fixes: 05ba1f082300 ("fuse: add FALLOCATE operation")
  17 Cc: <stable@vger.kernel.org> # v3.5
  18 Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
  19 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  20
  21 ---
  22  fs/fuse/file.c |    7 +++++++
  23  1 file changed, 7 insertions(+)
  24
  25 --- a/fs/fuse/file.c
  26 +++ b/fs/fuse/file.c
  27 @@ -2987,6 +2987,13 @@ static long fuse_file_fallocate(struct f
  28                 }
  29         }
  30
  31 +       if (!(mode & FALLOC_FL_KEEP_SIZE) &&
  32 +           offset + length > i_size_read(inode)) {
  33 +               err = inode_newsize_ok(inode, offset + length);
  34 +               if (err)
  35 +                       return err;
  36 +       }
  37 +
  38         if (!(mode & FALLOC_FL_KEEP_SIZE))
  39                 set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
  40