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(parent: d4698d3) | patch
vfs: fix vmplice_to_user()
authorMiklos Szeredi <mszeredi@suse.cz>
Tue, 27 May 2014 14:41:16 +0000 (16:41 +0200)
committerAl Viro <viro@zeniv.linux.org.uk>
Wed, 28 May 2014 05:54:52 +0000 (01:54 -0400)
commit7ab4a7114bab35bda7ec7340dae71ce0c1cb66f0
tree625ca1eb1d708ea7ceccba35362ee6ffa1daf9datree | snapshot
parentd4698d38efaad20f09e82fefaae44d7f0678d1a0commit | diff
vfs: fix vmplice_to_user()

Commit f130464180c9 "switch vmsplice_to_user() to copy_page_to_iter()" in
v3.15-rc1 broke vmsplice(2).

This patch fixes two bugs:

 - count is not initialized to a proper value, which resulted in no data
   being copied

 - if rw_copy_check_uvector() returns negative then the iov might be leaked.

Tested OK.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
fs/splice.c diff | blob | history
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