diff options
author | J. Bruce Fields <bfields@fieldses.org> | 2006-03-21 04:23:11 (GMT) |
---|---|---|
committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-21 04:23:11 (GMT) |
commit | 9e57b302cf0f27063184196def620f39ca7a5fc6 (patch) | |
tree | 3b154f314dfad8c4350af10b87ab7f4759df3f6d /net/sunrpc | |
parent | 7a1218a277c45cba1fb8d7089407a1769c645c43 (diff) | |
download | linux-fsl-qoriq-9e57b302cf0f27063184196def620f39ca7a5fc6.tar.xz |
SUNRPC,RPCSEC_GSS: remove unnecessary kmalloc of a checksum
Remove unnecessary kmalloc of temporary space to hold the md5 result; it's
small enough to just put on the stack.
This code may be called to process rpc's necessary to perform writes, so
there's a potential deadlock whenever we kmalloc() here. After this a
couple kmalloc()'s still remain, to be removed soon.
This also fixes a rare double-free on error noticed by coverity.
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'net/sunrpc')
-rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_seal.c | 6 | ||||
-rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_unseal.c | 4 | ||||
-rw-r--r-- | net/sunrpc/auth_gss/gss_krb5_wrap.c | 10 | ||||
-rw-r--r-- | net/sunrpc/auth_gss/gss_spkm3_seal.c | 5 | ||||
-rw-r--r-- | net/sunrpc/auth_gss/gss_spkm3_unseal.c | 4 |
5 files changed, 12 insertions, 17 deletions
diff --git a/net/sunrpc/auth_gss/gss_krb5_seal.c b/net/sunrpc/auth_gss/gss_krb5_seal.c index d0dfdfd..58f9721 100644 --- a/net/sunrpc/auth_gss/gss_krb5_seal.c +++ b/net/sunrpc/auth_gss/gss_krb5_seal.c @@ -76,7 +76,8 @@ gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text, { struct krb5_ctx *ctx = gss_ctx->internal_ctx_id; s32 checksum_type; - struct xdr_netobj md5cksum = {.len = 0, .data = NULL}; + char cksumdata[16]; + struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata}; unsigned char *ptr, *krb5_hdr, *msg_start; s32 now; @@ -133,8 +134,6 @@ gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text, BUG(); } - kfree(md5cksum.data); - if ((krb5_make_seq_num(ctx->seq, ctx->initiate ? 0 : 0xff, ctx->seq_send, krb5_hdr + 16, krb5_hdr + 8))) goto out_err; @@ -143,6 +142,5 @@ gss_get_mic_kerberos(struct gss_ctx *gss_ctx, struct xdr_buf *text, return ((ctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE); out_err: - kfree(md5cksum.data); return GSS_S_FAILURE; } diff --git a/net/sunrpc/auth_gss/gss_krb5_unseal.c b/net/sunrpc/auth_gss/gss_krb5_unseal.c index db055fd..0828cf6 100644 --- a/net/sunrpc/auth_gss/gss_krb5_unseal.c +++ b/net/sunrpc/auth_gss/gss_krb5_unseal.c @@ -79,7 +79,8 @@ gss_verify_mic_kerberos(struct gss_ctx *gss_ctx, int signalg; int sealalg; s32 checksum_type; - struct xdr_netobj md5cksum = {.len = 0, .data = NULL}; + char cksumdata[16]; + struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata}; s32 now; int direction; s32 seqnum; @@ -176,6 +177,5 @@ gss_verify_mic_kerberos(struct gss_ctx *gss_ctx, ret = GSS_S_COMPLETE; out: - kfree(md5cksum.data); return ret; } diff --git a/net/sunrpc/auth_gss/gss_krb5_wrap.c b/net/sunrpc/auth_gss/gss_krb5_wrap.c index af777cf..346133e 100644 --- a/net/sunrpc/auth_gss/gss_krb5_wrap.c +++ b/net/sunrpc/auth_gss/gss_krb5_wrap.c @@ -121,7 +121,8 @@ gss_wrap_kerberos(struct gss_ctx *ctx, int offset, { struct krb5_ctx *kctx = ctx->internal_ctx_id; s32 checksum_type; - struct xdr_netobj md5cksum = {.len = 0, .data = NULL}; + char cksumdata[16]; + struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata}; int blocksize = 0, plainlen; unsigned char *ptr, *krb5_hdr, *msg_start; s32 now; @@ -205,8 +206,6 @@ gss_wrap_kerberos(struct gss_ctx *ctx, int offset, BUG(); } - kfree(md5cksum.data); - /* XXX would probably be more efficient to compute checksum * and encrypt at the same time: */ if ((krb5_make_seq_num(kctx->seq, kctx->initiate ? 0 : 0xff, @@ -221,7 +220,6 @@ gss_wrap_kerberos(struct gss_ctx *ctx, int offset, return ((kctx->endtime < now) ? GSS_S_CONTEXT_EXPIRED : GSS_S_COMPLETE); out_err: - if (md5cksum.data) kfree(md5cksum.data); return GSS_S_FAILURE; } @@ -232,7 +230,8 @@ gss_unwrap_kerberos(struct gss_ctx *ctx, int offset, struct xdr_buf *buf) int signalg; int sealalg; s32 checksum_type; - struct xdr_netobj md5cksum = {.len = 0, .data = NULL}; + char cksumdata[16]; + struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata}; s32 now; int direction; s32 seqnum; @@ -358,6 +357,5 @@ gss_unwrap_kerberos(struct gss_ctx *ctx, int offset, struct xdr_buf *buf) ret = GSS_S_COMPLETE; out: - if (md5cksum.data) kfree(md5cksum.data); return ret; } diff --git a/net/sunrpc/auth_gss/gss_spkm3_seal.c b/net/sunrpc/auth_gss/gss_spkm3_seal.c index 86fbf7c..18c7862 100644 --- a/net/sunrpc/auth_gss/gss_spkm3_seal.c +++ b/net/sunrpc/auth_gss/gss_spkm3_seal.c @@ -57,7 +57,8 @@ spkm3_make_token(struct spkm3_ctx *ctx, { s32 checksum_type; char tokhdrbuf[25]; - struct xdr_netobj md5cksum = {.len = 0, .data = NULL}; + char cksumdata[16]; + struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata}; struct xdr_netobj mic_hdr = {.len = 0, .data = tokhdrbuf}; int tokenlen = 0; unsigned char *ptr; @@ -115,13 +116,11 @@ spkm3_make_token(struct spkm3_ctx *ctx, dprintk("RPC: gss_spkm3_seal: SPKM_WRAP_TOK not supported\n"); goto out_err; } - kfree(md5cksum.data); /* XXX need to implement sequence numbers, and ctx->expired */ return GSS_S_COMPLETE; out_err: - kfree(md5cksum.data); token->data = NULL; token->len = 0; return GSS_S_FAILURE; diff --git a/net/sunrpc/auth_gss/gss_spkm3_unseal.c b/net/sunrpc/auth_gss/gss_spkm3_unseal.c index 96851b0..8537f58 100644 --- a/net/sunrpc/auth_gss/gss_spkm3_unseal.c +++ b/net/sunrpc/auth_gss/gss_spkm3_unseal.c @@ -56,7 +56,8 @@ spkm3_read_token(struct spkm3_ctx *ctx, { s32 code; struct xdr_netobj wire_cksum = {.len =0, .data = NULL}; - struct xdr_netobj md5cksum = {.len = 0, .data = NULL}; + char cksumdata[16]; + struct xdr_netobj md5cksum = {.len = 0, .data = cksumdata}; unsigned char *ptr = (unsigned char *)read_token->data; unsigned char *cksum; int bodysize, md5elen; @@ -120,7 +121,6 @@ spkm3_read_token(struct spkm3_ctx *ctx, /* XXX: need to add expiration and sequencing */ ret = GSS_S_COMPLETE; out: - kfree(md5cksum.data); kfree(wire_cksum.data); return ret; } |