Merge tag 's390-6.9-6' of git://git.kernel.org/pub/scm/linux/kernel/g…

…it/s390/linux

Pull s390 fixes from Alexander Gordeev:

 - The function __storage_key_init_range() expects the end address to be
   the first byte outside the range to be initialized. Fix the callers
   that provide the last byte within the range instead.

 - 3270 Channel Command Word (CCW) may contain zero data address in case
   there is no data in the request. Add data availability check to avoid
   erroneous non-zero value as result of virt_to_dma32(NULL) application
   in cases there is no data

 - Add missing CFI directives for an unwinder to restore the return
   address in the vDSO assembler code

 - NUL-terminate kernel buffer when duplicating user space memory region
   on Channel IO (CIO) debugfs write inject

 - Fix wrong format string in zcrypt debug output

 - Return -EBUSY code when a CCA card is temporarily unavailabile

 - Restore a loop that retries derivation of a protected key from a
   secure key in cases the low level reports temporarily unavailability
   with -EBUSY code

* tag 's390-6.9-6' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/paes: Reestablish retry loop in paes
  s390/zcrypt: Use EBUSY to indicate temp unavailability
  s390/zcrypt: Handle ep11 cprb return code
  s390/zcrypt: Fix wrong format string in debug feature printout
  s390/cio: Ensure the copied buf is NUL terminated
  s390/vdso: Add CFI for RA register to asm macro vdso_func
  s390/3270: Fix buffer assignment
  s390/mm: Fix clearing storage keys for huge pages
  s390/mm: Fix storage key clearing for guest huge pages

arch/s390/crypto/paes_s390.c

@@ -125,8 +125,19 @@ struct s390_pxts_ctx {
 static inline int __paes_keyblob2pkey(struct key_blob *kb,
 				     struct pkey_protkey *pk)
 {
-	return pkey_keyblob2pkey(kb->key, kb->keylen,
-				 pk->protkey, &pk->len, &pk->type);
+	int i, ret = -EIO;
+
+	/* try three times in case of busy card */
+	for (i = 0; ret && i < 3; i++) {
+		if (ret == -EBUSY && in_task()) {
+			if (msleep_interruptible(1000))
+				return -EINTR;
+		}
+		ret = pkey_keyblob2pkey(kb->key, kb->keylen,
+					pk->protkey, &pk->len, &pk->type);
+	}
+
+	return ret;
 }
 
 static inline int __paes_convert_key(struct s390_paes_ctx *ctx)

arch/s390/include/asm/dwarf.h

@@ -9,6 +9,7 @@
 #define CFI_DEF_CFA_OFFSET	.cfi_def_cfa_offset
 #define CFI_ADJUST_CFA_OFFSET	.cfi_adjust_cfa_offset
 #define CFI_RESTORE		.cfi_restore
+#define CFI_REL_OFFSET		.cfi_rel_offset
 
 #ifdef CONFIG_AS_CFI_VAL_OFFSET
 #define CFI_VAL_OFFSET		.cfi_val_offset

arch/s390/kernel/vdso64/vdso_user_wrapper.S

@@ -24,8 +24,10 @@ __kernel_\func:
 	CFI_DEF_CFA_OFFSET (STACK_FRAME_OVERHEAD + WRAPPER_FRAME_SIZE)
 	CFI_VAL_OFFSET 15, -STACK_FRAME_OVERHEAD
 	stg	%r14,STACK_FRAME_OVERHEAD(%r15)
+	CFI_REL_OFFSET 14, STACK_FRAME_OVERHEAD
 	brasl	%r14,__s390_vdso_\func
 	lg	%r14,STACK_FRAME_OVERHEAD(%r15)
+	CFI_RESTORE 14
 	aghi	%r15,WRAPPER_FRAME_SIZE
 	CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD
 	CFI_RESTORE 15

arch/s390/mm/gmap.c

@@ -2661,7 +2661,7 @@ static int __s390_enable_skey_hugetlb(pte_t *pte, unsigned long addr,
 		return 0;
 
 	start = pmd_val(*pmd) & HPAGE_MASK;
-	end = start + HPAGE_SIZE - 1;
+	end = start + HPAGE_SIZE;
 	__storage_key_init_range(start, end);
 	set_bit(PG_arch_1, &page->flags);
 	cond_resched();

arch/s390/mm/hugetlbpage.c

@@ -139,7 +139,7 @@ static void clear_huge_pte_skeys(struct mm_struct *mm, unsigned long rste)
 	}
 
 	if (!test_and_set_bit(PG_arch_1, &page->flags))
-		__storage_key_init_range(paddr, paddr + size - 1);
+		__storage_key_init_range(paddr, paddr + size);
 }
 
 void __set_huge_pte_at(struct mm_struct *mm, unsigned long addr,

drivers/s390/char/raw3270.c

@@ -162,7 +162,8 @@ struct raw3270_request *raw3270_request_alloc(size_t size)
 	/*
 	 * Setup ccw.
 	 */
-	rq->ccw.cda = virt_to_dma32(rq->buffer);
+	if (rq->buffer)
+		rq->ccw.cda = virt_to_dma32(rq->buffer);
 	rq->ccw.flags = CCW_FLAG_SLI;
 
 	return rq;
@@ -188,7 +189,8 @@ int raw3270_request_reset(struct raw3270_request *rq)
 		return -EBUSY;
 	rq->ccw.cmd_code = 0;
 	rq->ccw.count = 0;
-	rq->ccw.cda = virt_to_dma32(rq->buffer);
+	if (rq->buffer)
+		rq->ccw.cda = virt_to_dma32(rq->buffer);
 	rq->ccw.flags = CCW_FLAG_SLI;
 	rq->rescnt = 0;
 	rq->rc = 0;

drivers/s390/cio/cio_inject.c

@@ -95,7 +95,7 @@ static ssize_t crw_inject_write(struct file *file, const char __user *buf,
 		return -EINVAL;
 	}
 
-	buffer = vmemdup_user(buf, lbuf);
+	buffer = memdup_user_nul(buf, lbuf);
 	if (IS_ERR(buffer))
 		return -ENOMEM;
 

drivers/s390/crypto/zcrypt_ccamisc.c

@@ -658,7 +658,7 @@ int cca_sec2protkey(u16 cardnr, u16 domain,
 			       (int)prepcblk->ccp_rtcode,
 			       (int)prepcblk->ccp_rscode);
 		if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
-			rc = -EAGAIN;
+			rc = -EBUSY;
 		else
 			rc = -EIO;
 		goto out;
@@ -1263,7 +1263,7 @@ int cca_cipher2protkey(u16 cardnr, u16 domain, const u8 *ckey,
 			       (int)prepcblk->ccp_rtcode,
 			       (int)prepcblk->ccp_rscode);
 		if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
-			rc = -EAGAIN;
+			rc = -EBUSY;
 		else
 			rc = -EIO;
 		goto out;
@@ -1426,7 +1426,7 @@ int cca_ecc2protkey(u16 cardnr, u16 domain, const u8 *key,
 			       (int)prepcblk->ccp_rtcode,
 			       (int)prepcblk->ccp_rscode);
 		if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
-			rc = -EAGAIN;
+			rc = -EBUSY;
 		else
 			rc = -EIO;
 		goto out;

drivers/s390/crypto/zcrypt_ep11misc.c

@@ -556,13 +556,29 @@ static int check_reply_pl(const u8 *pl, const char *func)
 	pl += 2;
 	ret = *((u32 *)pl);
 	if (ret != 0) {
-		ZCRYPT_DBF_ERR("%s return value 0x%04x != 0\n", func, ret);
+		ZCRYPT_DBF_ERR("%s return value 0x%08x != 0\n", func, ret);
 		return -EIO;
 	}
 
 	return 0;
 }
 
+/* Check ep11 reply cprb, return 0 or suggested errno value. */
+static int check_reply_cprb(const struct ep11_cprb *rep, const char *func)
+{
+	/* check ep11 reply return code field */
+	if (rep->ret_code) {
+		ZCRYPT_DBF_ERR("%s ep11 reply ret_code=0x%08x\n", __func__,
+			       rep->ret_code);
+		if (rep->ret_code == 0x000c0003)
+			return -EBUSY;
+		else
+			return -EIO;
+	}
+
+	return 0;
+}
+
 /*
  * Helper function which does an ep11 query with given query type.
  */
@@ -627,6 +643,12 @@ static int ep11_query_info(u16 cardnr, u16 domain, u32 query_type,
 		goto out;
 	}
 
+	/* check ep11 reply cprb */
+	rc = check_reply_cprb(rep, __func__);
+	if (rc)
+		goto out;
+
+	/* check payload */
 	rc = check_reply_pl((u8 *)rep_pl, __func__);
 	if (rc)
 		goto out;
@@ -877,6 +899,12 @@ static int _ep11_genaeskey(u16 card, u16 domain,
 		goto out;
 	}
 
+	/* check ep11 reply cprb */
+	rc = check_reply_cprb(rep, __func__);
+	if (rc)
+		goto out;
+
+	/* check payload */
 	rc = check_reply_pl((u8 *)rep_pl, __func__);
 	if (rc)
 		goto out;
@@ -1028,6 +1056,12 @@ static int ep11_cryptsingle(u16 card, u16 domain,
 		goto out;
 	}
 
+	/* check ep11 reply cprb */
+	rc = check_reply_cprb(rep, __func__);
+	if (rc)
+		goto out;
+
+	/* check payload */
 	rc = check_reply_pl((u8 *)rep_pl, __func__);
 	if (rc)
 		goto out;
@@ -1185,6 +1219,12 @@ static int _ep11_unwrapkey(u16 card, u16 domain,
 		goto out;
 	}
 
+	/* check ep11 reply cprb */
+	rc = check_reply_cprb(rep, __func__);
+	if (rc)
+		goto out;
+
+	/* check payload */
 	rc = check_reply_pl((u8 *)rep_pl, __func__);
 	if (rc)
 		goto out;
@@ -1339,6 +1379,12 @@ static int _ep11_wrapkey(u16 card, u16 domain,
 		goto out;
 	}
 
+	/* check ep11 reply cprb */
+	rc = check_reply_cprb(rep, __func__);
+	if (rc)
+		goto out;
+
+	/* check payload */
 	rc = check_reply_pl((u8 *)rep_pl, __func__);
 	if (rc)
 		goto out;