linux

iv/linux

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Ivan Vecera f1db1b8055 kernfs: fix regression in kernfs_fop_write caused by wrong type

commit ba87977a49 upstream.

Commit b7ce40cff0 ("kernfs: cache atomic_write_len in
kernfs_open_file") changes type of local variable 'len' from ssize_t
to size_t. This change caused that the *ppos value is updated also
when the previous write callback failed.

Mentioned snippet:
...
len = ops->write(...); <- return value can be negative
...
if (len > 0)           <- true here in this case
        *ppos += len;
...

Fixes: b7ce40cff0 ("kernfs: cache atomic_write_len in kernfs_open_file")
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-02-16 20:09:42 +01:00

dir.c

kernfs: implement kernfs_path_len()

2015-08-18 15:49:15 -07:00

file.c

kernfs: fix regression in kernfs_fop_write caused by wrong type

2018-02-16 20:09:42 +01:00

inode.c

kernfs: Add support for always empty directories.

2015-07-01 10:36:43 -05:00

Kconfig

kernfs: add CONFIG_KERNFS