3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: "J. Bruce Fields" <bfields@xxxxxxxxxx> commit 427d6c6646d868fbd3094e7e2e1644d480cd9204 upstream. Someone noticed exportfs happily accepted exports that would later be rejected when mountd tried to give them to the kernel. Fix this. This is a regression from 4c1e1b34d5c800ad3ac9a7e2805b0bea70ad2278 "nfsd: Store ex_anon_uid and ex_anon_gid as kuids and kgids". Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx> Reported-by: Yin.JianHong <jiyin@xxxxxxxxxx> Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/nfsd/export.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) --- a/fs/nfsd/export.c +++ b/fs/nfsd/export.c @@ -536,16 +536,12 @@ static int svc_export_parse(struct cache if (err) goto out3; exp.ex_anon_uid= make_kuid(&init_user_ns, an_int); - if (!uid_valid(exp.ex_anon_uid)) - goto out3; /* anon gid */ err = get_int(&mesg, &an_int); if (err) goto out3; exp.ex_anon_gid= make_kgid(&init_user_ns, an_int); - if (!gid_valid(exp.ex_anon_gid)) - goto out3; /* fsid */ err = get_int(&mesg, &an_int); @@ -583,6 +579,17 @@ static int svc_export_parse(struct cache exp.ex_uuid); if (err) goto out4; + /* + * For some reason exportfs has been passing down an + * invalid (-1) uid & gid on the "dummy" export which it + * uses to test export support. To make sure exportfs + * sees errors from check_export we therefore need to + * delay these checks till after check_export: + */ + if (!uid_valid(exp.ex_anon_uid)) + goto out4; + if (!gid_valid(exp.ex_anon_gid)) + goto out4; } expp = svc_export_lookup(&exp); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html