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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-06-14 01:19:23 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-09-21 03:12:51 -0700 |
| commit | b9b73f7c4d45d69289aa16620b04430068dd3941 (patch) | |
| tree | 4556d632d3958b45e30de3ace80ef688fc216850 /drivers/usb/gadget/f_fs.c | |
| parent | 32d639c66e04149d490093f8b4b49cb922bfe294 (diff) | |
| download | linux-stable-b9b73f7c4d45d69289aa16620b04430068dd3941.tar.gz linux-stable-b9b73f7c4d45d69289aa16620b04430068dd3941.tar.bz2 linux-stable-b9b73f7c4d45d69289aa16620b04430068dd3941.zip | |
userns: Convert usb functionfs to use kuid/kgid where appropriate
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Felipe Balbi <balbi@ti.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'drivers/usb/gadget/f_fs.c')
| -rw-r--r-- | drivers/usb/gadget/f_fs.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/drivers/usb/gadget/f_fs.c b/drivers/usb/gadget/f_fs.c index 8adc79d1b402..f9ee4e08a4a8 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, }; |