From: "Eric W. Biederman" <ebied...@xmission.com>
Cc: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Cc: Felipe Balbi <ba...@ti.com>
Acked-by: Serge Hallyn <serge.hal...@canonical.com>
Signed-off-by: Eric W. Biederman <ebied...@xmission.com>
---
drivers/usb/gadget/f_fs.c | 23 ++++++++++++++++-------
init/Kconfig | 1 -
2 files changed, 16 insertions(+), 8 deletions(-)
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c
index 8adc79d..f9ee4e0 100644
--- a/drivers/usb/gadget/f_fs.c
+++ b/drivers/usb/gadget/f_fs.c
@@ -220,8 +220,8 @@ struct ffs_data {
/* File permissions, written once when fs is mounted */
struct ffs_file_perms {
umode_t mode;
- uid_t uid;
- gid_t gid;
+ kuid_t uid;
+ kgid_t gid;
} file_perms;
/*
@@ -1143,10 +1143,19 @@ static int ffs_fs_parse_opts(struct ffs_sb_fill_data
*data, char *opts)
break;
case 3:
- if (!memcmp(opts, "uid", 3))
- data->perms.uid = value;
+ if (!memcmp(opts, "uid", 3)) {
+ data->perms.uid = make_kuid(current_user_ns(),
value);
+ if (!uid_valid(data->perms.uid)) {
+ pr_err("%s: unmapped value: %lu\n",
opts, value);
+ return -EINVAL;
+ }
+ }
else if (!memcmp(opts, "gid", 3))
- data->perms.gid = value;
+ data->perms.gid = make_kgid(current_user_ns(),
value);
+ if (!gid_valid(data->perms.gid)) {
+ pr_err("%s: unmapped value: %lu\n",
opts, value);
+ return -EINVAL;
+ }
else
goto invalid;
break;
@@ -1175,8 +1184,8 @@ ffs_fs_mount(struct file_system_type *t, int flags,
struct ffs_sb_fill_data data = {
.perms = {
.mode = S_IFREG | 0600,
- .uid = 0,
- .gid = 0
+ .uid = GLOBAL_ROOT_UID,
+ .gid = GLOBAL_ROOT_GID,
},
.root_mode = S_IFDIR | 0500,
};
diff --git a/init/Kconfig b/init/Kconfig
index 633bde2..e7e0cc1 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -932,7 +932,6 @@ config UIDGID_CONVERTED
depends on NET_9P = n
# Filesystems
- depends on USB_FUNCTIONFS = n
depends on DEVTMPFS = n
depends on XENFS = n
--
1.7.5.4
--
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