diff options
| author | Greg Banks <gnb@sgi.com> | 2007-02-21 00:14:36 +0100 |
|---|---|---|
| committer | Adrian Bunk <bunk@stusta.de> | 2007-02-21 00:14:36 +0100 |
| commit | 0d1335f51d535fa036c5cddccd1779cab5f2f143 (patch) | |
| tree | 4c9b4b606e3b443428b876f47da5b2be88128802 /fs/nfsd | |
| parent | af8f3558878c9894b8ed08d9273c6357aca313aa (diff) | |
Fix a free-wrong-pointer bug in nfs/acl server (CVE-2007-0772)
Due to type confusion, when an nfsacl verison 2 'ACCESS' request
finishes and tries to clean up, it calls fh_put on entiredly the
wrong thing and this can cause an oops.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs2acl.c | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c index fc95c4df6693..c318b6fc8187 100644 --- a/fs/nfsd/nfs2acl.c +++ b/fs/nfsd/nfs2acl.c @@ -287,13 +287,20 @@ static int nfsaclsvc_release_getacl(struct svc_rqst *rqstp, u32 *p, return 1; } -static int nfsaclsvc_release_fhandle(struct svc_rqst *rqstp, u32 *p, - struct nfsd_fhandle *resp) +static int nfsaclsvc_release_attrstat(struct svc_rqst *rqstp, u32 *p, + struct nfsd_attrstat *resp) { fh_put(&resp->fh); return 1; } +static int nfsaclsvc_release_access(struct svc_rqst *rqstp, u32 *p, + struct nfsd3_accessres *resp) +{ + fh_put(&resp->fh); + return 1; +} + #define nfsaclsvc_decode_voidargs NULL #define nfsaclsvc_encode_voidres NULL #define nfsaclsvc_release_void NULL @@ -322,9 +329,9 @@ struct nfsd3_voidargs { int dummy; }; static struct svc_procedure nfsd_acl_procedures2[] = { PROC(null, void, void, void, RC_NOCACHE, ST), PROC(getacl, getacl, getacl, getacl, RC_NOCACHE, ST+1+2*(1+ACL)), - PROC(setacl, setacl, attrstat, fhandle, RC_NOCACHE, ST+AT), - PROC(getattr, fhandle, attrstat, fhandle, RC_NOCACHE, ST+AT), - PROC(access, access, access, fhandle, RC_NOCACHE, ST+AT+1), + PROC(setacl, setacl, attrstat, attrstat, RC_NOCACHE, ST+AT), + PROC(getattr, fhandle, attrstat, attrstat, RC_NOCACHE, ST+AT), + PROC(access, access, access, access, RC_NOCACHE, ST+AT+1), }; struct svc_version nfsd_acl_version2 = { |