add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/nfs/callback_xdr.c
..
..
@@ -18,6 +18,7 @@
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 #include "callback.h"
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 #include "internal.h"
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 #include "nfs4session.h"
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+#include "nfs4trace.h"
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22
 
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 #define CB_OP_TAGLEN_MAXSZ		(512)
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 #define CB_OP_HDR_RES_MAXSZ		(2 * 4) // opcode, status
..
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@@ -72,16 +73,6 @@
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 	return xdr_ressize_check(rqstp, p);
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 }
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-static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes)
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-{
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-	__be32 *p;
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-
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-	p = xdr_inline_decode(xdr, nbytes);
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-	if (unlikely(p == NULL))
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-		printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n");
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-	return p;
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-}
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-
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 static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len,
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77
 		const char **str, size_t maxlen)
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 {
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@@ -98,13 +89,13 @@
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 {
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 	__be32 *p;
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-	p = read_buf(xdr, 4);
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+	p = xdr_inline_decode(xdr, 4);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	fh->size = ntohl(*p);
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 	if (fh->size > NFS4_FHSIZE)
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 		return htonl(NFS4ERR_BADHANDLE);
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-	p = read_buf(xdr, fh->size);
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+	p = xdr_inline_decode(xdr, fh->size);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	memcpy(&fh->data[0], p, fh->size);
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@@ -117,11 +108,11 @@
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 	__be32 *p;
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 	unsigned int attrlen;
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110
 
120
-	p = read_buf(xdr, 4);
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+	p = xdr_inline_decode(xdr, 4);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	attrlen = ntohl(*p);
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-	p = read_buf(xdr, attrlen << 2);
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+	p = xdr_inline_decode(xdr, attrlen << 2);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	if (likely(attrlen > 0))
..
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@@ -135,7 +126,7 @@
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 {
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 	__be32 *p;
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-	p = read_buf(xdr, NFS4_STATEID_SIZE);
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+	p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	memcpy(stateid->data, p, NFS4_STATEID_SIZE);
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@@ -156,7 +147,7 @@
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 	status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ);
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 	if (unlikely(status != 0))
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 		return status;
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-	p = read_buf(xdr, 12);
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+	p = xdr_inline_decode(xdr, 12);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	hdr->minorversion = ntohl(*p++);
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@@ -176,7 +167,7 @@
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 static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
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 {
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 	__be32 *p;
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-	p = read_buf(xdr, 4);
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+	p = xdr_inline_decode(xdr, 4);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE_HDR);
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 	*op = ntohl(*p);
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@@ -205,7 +196,7 @@
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 	status = decode_delegation_stateid(xdr, &args->stateid);
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 	if (unlikely(status != 0))
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 		return status;
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-	p = read_buf(xdr, 4);
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+	p = xdr_inline_decode(xdr, 4);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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 	args->truncate = ntohl(*p);
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@@ -227,7 +218,7 @@
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 	__be32 status = 0;
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 	uint32_t iomode;
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-	p = read_buf(xdr, 4 * sizeof(uint32_t));
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+	p = xdr_inline_decode(xdr, 4 * sizeof(uint32_t));
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_BADXDR);
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224
 
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@@ -245,14 +236,14 @@
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 		if (unlikely(status != 0))
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 			return status;
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-		p = read_buf(xdr, 2 * sizeof(uint64_t));
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+		p = xdr_inline_decode(xdr, 2 * sizeof(uint64_t));
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 		if (unlikely(p == NULL))
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 			return htonl(NFS4ERR_BADXDR);
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 		p = xdr_decode_hyper(p, &args->cbl_range.offset);
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 		p = xdr_decode_hyper(p, &args->cbl_range.length);
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 		return decode_layout_stateid(xdr, &args->cbl_stateid);
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 	} else if (args->cbl_recall_type == RETURN_FSID) {
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-		p = read_buf(xdr, 2 * sizeof(uint64_t));
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+		p = xdr_inline_decode(xdr, 2 * sizeof(uint64_t));
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 		if (unlikely(p == NULL))
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 			return htonl(NFS4ERR_BADXDR);
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 		p = xdr_decode_hyper(p, &args->cbl_fsid.major);
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@@ -273,7 +264,7 @@
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 	__be32 status = 0;
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 	/* Num of device notifications */
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-	p = read_buf(xdr, sizeof(uint32_t));
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+	p = xdr_inline_decode(xdr, sizeof(uint32_t));
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 	if (unlikely(p == NULL)) {
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 		status = htonl(NFS4ERR_BADXDR);
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 		goto out;
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@@ -281,10 +272,6 @@
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 	n = ntohl(*p++);
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 	if (n == 0)
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 		goto out;
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-	if (n > ULONG_MAX / sizeof(*args->devs)) {
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-		status = htonl(NFS4ERR_BADXDR);
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-		goto out;
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-	}
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275
 
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 	args->devs = kmalloc_array(n, sizeof(*args->devs), GFP_KERNEL);
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 	if (!args->devs) {
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@@ -296,7 +283,8 @@
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 	for (i = 0; i < n; i++) {
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 		struct cb_devicenotifyitem *dev = &args->devs[i];
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285
 
299
-		p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE);
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+		p = xdr_inline_decode(xdr, (4 * sizeof(uint32_t)) +
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+				      NFS4_DEVICEID4_SIZE);
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 		if (unlikely(p == NULL)) {
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 			status = htonl(NFS4ERR_BADXDR);
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 			goto err;
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@@ -327,7 +315,7 @@
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 		p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
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 		if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) {
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-			p = read_buf(xdr, sizeof(uint32_t));
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+			p = xdr_inline_decode(xdr, sizeof(uint32_t));
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 			if (unlikely(p == NULL)) {
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 				status = htonl(NFS4ERR_BADXDR);
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 				goto err;
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@@ -359,7 +347,7 @@
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 {
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 	__be32 *p;
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-	p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN);
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+	p = xdr_inline_decode(xdr, NFS4_MAX_SESSIONID_LEN);
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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353
 
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@@ -379,13 +367,13 @@
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 		goto out;
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381
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 	status = htonl(NFS4ERR_RESOURCE);
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-	p = read_buf(xdr, sizeof(uint32_t));
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+	p = xdr_inline_decode(xdr, sizeof(uint32_t));
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 	if (unlikely(p == NULL))
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 		goto out;
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373
 
386
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 	rc_list->rcl_nrefcalls = ntohl(*p++);
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 	if (rc_list->rcl_nrefcalls) {
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-		p = read_buf(xdr,
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+		p = xdr_inline_decode(xdr,
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 			     rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
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 		if (unlikely(p == NULL))
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 			goto out;
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@@ -418,7 +406,7 @@
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 	if (status)
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 		return status;
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408
 
421
-	p = read_buf(xdr, 5 * sizeof(uint32_t));
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+	p = xdr_inline_decode(xdr, 5 * sizeof(uint32_t));
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 	if (unlikely(p == NULL))
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 		return htonl(NFS4ERR_RESOURCE);
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412
 
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@@ -461,7 +449,7 @@
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 	uint32_t bitmap[2];
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450
 	__be32 *p, status;
463
451
 
464
-	p = read_buf(xdr, 4);
452
+	p = xdr_inline_decode(xdr, 4);
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453
 	if (unlikely(p == NULL))
466
454
 		return htonl(NFS4ERR_BADXDR);
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 	args->craa_objs_to_keep = ntohl(*p++);
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@@ -480,7 +468,7 @@
480
468
 	struct cb_recallslotargs *args = argp;
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469
 	__be32 *p;
482
470
 
483
-	p = read_buf(xdr, 4);
471
+	p = xdr_inline_decode(xdr, 4);
484
472
 	if (unlikely(p == NULL))
485
473
 		return htonl(NFS4ERR_BADXDR);
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 	args->crsa_target_highest_slotid = ntohl(*p++);
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@@ -492,14 +480,14 @@
492
480
 	__be32		*p;
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481
 	unsigned int	len;
494
482
 
495
-	p = read_buf(xdr, 12);
483
+	p = xdr_inline_decode(xdr, 12);
496
484
 	if (unlikely(p == NULL))
497
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 		return htonl(NFS4ERR_BADXDR);
498
486
 
499
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 	p = xdr_decode_hyper(p, &args->cbnl_owner.clientid);
500
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 	len = be32_to_cpu(*p);
501
489
 
502
-	p = read_buf(xdr, len);
490
+	p = xdr_inline_decode(xdr, len);
503
491
 	if (unlikely(p == NULL))
504
492
 		return htonl(NFS4ERR_BADXDR);
505
493
 
..
..
@@ -537,7 +525,7 @@
537
525
 	__be32 *p;
538
526
 
539
527
 	/* skip the always zero field */
540
-	p = read_buf(xdr, 4);
528
+	p = xdr_inline_decode(xdr, 4);
541
529
 	if (unlikely(!p))
542
530
 		goto out;
543
531
 	p++;
..
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@@ -577,7 +565,7 @@
577
565
 		return status;
578
566
 
579
567
 	/* decode status */
580
-	p = read_buf(xdr, 4);
568
+	p = xdr_inline_decode(xdr, 4);
581
569
 	if (unlikely(!p))
582
570
 		goto out;
583
571
 	args->error = ntohl(*p++);
..
..
@@ -636,7 +624,7 @@
636
624
 	return 0;
637
625
 }
638
626
 
639
-static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec *time)
627
+static __be32 encode_attr_time(struct xdr_stream *xdr, const struct timespec64 *time)
640
628
 {
641
629
 	__be32 *p;
642
630
 
..
..
@@ -648,14 +636,14 @@
648
636
 	return 0;
649
637
 }
650
638
 
651
-static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
639
+static __be32 encode_attr_ctime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec64 *time)
652
640
 {
653
641
 	if (!(bitmap[1] & FATTR4_WORD1_TIME_METADATA))
654
642
 		return 0;
655
643
 	return encode_attr_time(xdr,time);
656
644
 }
657
645
 
658
-static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec *time)
646
+static __be32 encode_attr_mtime(struct xdr_stream *xdr, const uint32_t *bitmap, const struct timespec64 *time)
659
647
 {
660
648
 	if (!(bitmap[1] & FATTR4_WORD1_TIME_MODIFY))
661
649
 		return 0;
..
..
@@ -943,10 +931,11 @@
943
931
 	};
944
932
 	unsigned int nops = 0;
945
933
 
946
-	xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
934
+	xdr_init_decode(&xdr_in, &rqstp->rq_arg,
935
+			rqstp->rq_arg.head[0].iov_base, NULL);
947
936
 
948
937
 	p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
949
-	xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
938
+	xdr_init_encode(&xdr_out, &rqstp->rq_res, p, NULL);
950
939
 
951
940
 	status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
952
941
 	if (status == htonl(NFS4ERR_RESOURCE))
..
..
@@ -954,9 +943,13 @@
954
943
 
955
944
 	if (hdr_arg.minorversion == 0) {
956
945
 		cps.clp = nfs4_find_client_ident(SVC_NET(rqstp), hdr_arg.cb_ident);
957
-		if (!cps.clp || !check_gss_callback_principal(cps.clp, rqstp)) {
958
-			if (cps.clp)
959
-				nfs_put_client(cps.clp);
946
+		if (!cps.clp) {
947
+			trace_nfs_cb_no_clp(rqstp->rq_xid, hdr_arg.cb_ident);
948
+			goto out_invalidcred;
949
+		}
950
+		if (!check_gss_callback_principal(cps.clp, rqstp)) {
951
+			trace_nfs_cb_badprinc(rqstp->rq_xid, hdr_arg.cb_ident);
952
+			nfs_put_client(cps.clp);
960
953
 			goto out_invalidcred;
961
954
 		}
962
955
 	}