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* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-21  9:06 hansyao
  0 siblings, 0 replies; 10+ messages in thread
From: hansyao @ 2021-01-21  9:06 UTC (permalink / raw)
  To: yao_hang
  Cc: Tianjia Zhang, Tobias Markus, David Howells,
	Toke Høiland-Jørgensen, João Fonseca,
	Jarkko Sakkinen, stable, Linus Torvalds

From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
Tested-by: João Fonseca <jpedrofonseca@ua.pt>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 crypto/asymmetric_keys/public_key.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908ad58c..788a4ba1e2e7 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;
-- 
2.29.2


^ permalink raw reply related	[flat|nested] 10+ messages in thread
* Re: [PATCH] X.509: Fix crash caused by NULL pointer
  2021-01-22 12:19  Tan Zhongjun
@ 2021-01-22 13:03 ` Greg KH
  0 siblings, 0 replies; 10+ messages in thread
From: Greg KH @ 2021-01-22 13:03 UTC (permalink / raw)
  To:  Tan Zhongjun
  Cc: tanzhongjun, Tianjia Zhang, Tobias Markus, David Howells,
	Toke Høiland-Jørgensen, João Fonseca,
	Jarkko Sakkinen, stable, Linus Torvalds

On Fri, Jan 22, 2021 at 08:19:15PM +0800,  Tan Zhongjun wrote:
> From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
> 
> On the following call path, `sig->pkey_algo` is not assigned
> in asymmetric_key_verify_signature(), which causes runtime
> crash in public_key_verify_signature().
> 
>   keyctl_pkey_verify
>     asymmetric_key_verify_signature
>       verify_signature
>         public_key_verify_signature
> 
> This patch simply check this situation and fixes the crash
> caused by NULL pointer.
> 
> Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
> Reported-by: Tobias Markus <tobias@markus-regensburg.de>
> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
> Signed-off-by: David Howells <dhowells@redhat.com>
> Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
> Tested-by: João Fonseca <jpedrofonseca@ua.pt>
> Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
> Cc: stable@vger.kernel.org # v5.10+
> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
> Signed-off-by: george.tan <tanzhongjun@yulong.com>
> ---
>  crypto/asymmetric_keys/public_key.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 

Why send this to us again?  Is it needed somewhere we have not already
applied it to?

thanks,

greg k-h

^ permalink raw reply	[flat|nested] 10+ messages in thread
* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-22 12:24  Tan Zhongjun
  0 siblings, 0 replies; 10+ messages in thread
From:  Tan Zhongjun @ 2021-01-22 12:24 UTC (permalink / raw)
  To: tanzhongjun
  Cc: Tianjia Zhang, Tobias Markus, David Howells,
	Toke Høiland-Jørgensen, João Fonseca,
	Jarkko Sakkinen, stable, Linus Torvalds

From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
Tested-by: João Fonseca <jpedrofonseca@ua.pt>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: george.tan <tanzhongjun@yulong.com>
---
 crypto/asymmetric_keys/public_key.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908..788a4ba 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;
-- 
1.9.1



^ permalink raw reply related	[flat|nested] 10+ messages in thread
* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-22 12:19  Tan Zhongjun
  2021-01-22 13:03 ` Greg KH
  0 siblings, 1 reply; 10+ messages in thread
From:  Tan Zhongjun @ 2021-01-22 12:19 UTC (permalink / raw)
  To: tanzhongjun
  Cc: Tianjia Zhang, Tobias Markus, David Howells,
	Toke Høiland-Jørgensen, João Fonseca,
	Jarkko Sakkinen, stable, Linus Torvalds

From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
Tested-by: João Fonseca <jpedrofonseca@ua.pt>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: george.tan <tanzhongjun@yulong.com>
---
 crypto/asymmetric_keys/public_key.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908..788a4ba 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;
-- 
1.9.1



^ permalink raw reply related	[flat|nested] 10+ messages in thread
* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-19  0:13 David Howells
  0 siblings, 0 replies; 10+ messages in thread
From: David Howells @ 2021-01-19  0:13 UTC (permalink / raw)
  To: torvalds
  Cc: Tobias Markus, Tianjia Zhang, dhowells, keyrings, linux-crypto,
	linux-security-module, stable, linux-kernel


From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
Tested-by: João Fonseca <jpedrofonseca@ua.pt>
Cc: stable@vger.kernel.org # v5.10+
---

 crypto/asymmetric_keys/public_key.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908ad58c..788a4ba1e2e7 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;


^ permalink raw reply related	[flat|nested] 10+ messages in thread
* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-13 13:06 David Howells
  0 siblings, 0 replies; 10+ messages in thread
From: David Howells @ 2021-01-13 13:06 UTC (permalink / raw)
  To: torvalds
  Cc: Tobias Markus, Tianjia Zhang, dhowells, keyrings, linux-crypto,
	linux-security-module, stable, linux-kernel

From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
---

 crypto/asymmetric_keys/public_key.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908ad58c..788a4ba1e2e7 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;



^ permalink raw reply related	[flat|nested] 10+ messages in thread
* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-13 13:03 David Howells
  0 siblings, 0 replies; 10+ messages in thread
From: David Howells @ 2021-01-13 13:03 UTC (permalink / raw)
  To: torvalds
  Cc: stable, Tobias Markus, Tianjia Zhang, dhowells, keyrings,
	linux-crypto, linux-security-module, linux-kernel

From: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Cc: stable@vger.kernel.org # v5.10+
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-and-tested-by: Toke Høiland-Jørgensen <toke@redhat.com>
---

 crypto/asymmetric_keys/public_key.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908ad58c..788a4ba1e2e7 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;



^ permalink raw reply related	[flat|nested] 10+ messages in thread
* Re: [PATCH] X.509: Fix crash caused by NULL pointer
  2021-01-07 10:58 ` David Howells
@ 2021-01-13  3:02   ` Tianjia Zhang
  0 siblings, 0 replies; 10+ messages in thread
From: Tianjia Zhang @ 2021-01-13  3:02 UTC (permalink / raw)
  To: David Howells
  Cc: Herbert Xu, David S. Miller, Gilad Ben-Yossef, Tobias Markus,
	Tee Hao Wei, keyrings, linux-crypto, linux-kernel, stable



On 1/7/21 6:58 PM, David Howells wrote:
> Tianjia Zhang <tianjia.zhang@linux.alibaba.com> wrote:
> 
>> On the following call path, `sig->pkey_algo` is not assigned
>> in asymmetric_key_verify_signature(), which causes runtime
>> crash in public_key_verify_signature().
>>
>>    keyctl_pkey_verify
>>      asymmetric_key_verify_signature
>>        verify_signature
>>          public_key_verify_signature
>>
>> This patch simply check this situation and fixes the crash
>> caused by NULL pointer.
>>
>> Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
>> Cc: stable@vger.kernel.org # v5.10+
>> Reported-by: Tobias Markus <tobias@markus-regensburg.de>
>> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
> 
> Looks reasonable:
> 
> Acked-by: David Howells <dhowells@redhat.com>
> 
> I wonder, though, if cert_sig_digest_update() should be obtained by some sort
> of function pointer.  It doesn't really seem to belong in this file.  But this
> is a separate issue.
> 
> David
> 

Yes, this is indeed the logic of the SM2 module. I have tried to 
dynamically load and obtain the pointer of this function through 
`request_module` before, but this method still does not seem very 
suitable. Here are some unfinished codes I tried before:

https://github.com/uudiin/linux/commit/55bca48c6282415d94c53a7692622d544da99342

It would be great if you have some good experience to share with me, I 
will continue to try to optimize this code.

Best regards,
Tianjia

^ permalink raw reply	[flat|nested] 10+ messages in thread
* Re: [PATCH] X.509: Fix crash caused by NULL pointer
  2021-01-07  9:28 Tianjia Zhang
@ 2021-01-07 10:58 ` David Howells
  2021-01-13  3:02   ` Tianjia Zhang
  0 siblings, 1 reply; 10+ messages in thread
From: David Howells @ 2021-01-07 10:58 UTC (permalink / raw)
  To: Tianjia Zhang
  Cc: dhowells, Herbert Xu, David S. Miller, Gilad Ben-Yossef,
	Tobias Markus, Tee Hao Wei, keyrings, linux-crypto, linux-kernel,
	stable

Tianjia Zhang <tianjia.zhang@linux.alibaba.com> wrote:

> On the following call path, `sig->pkey_algo` is not assigned
> in asymmetric_key_verify_signature(), which causes runtime
> crash in public_key_verify_signature().
> 
>   keyctl_pkey_verify
>     asymmetric_key_verify_signature
>       verify_signature
>         public_key_verify_signature
> 
> This patch simply check this situation and fixes the crash
> caused by NULL pointer.
> 
> Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
> Cc: stable@vger.kernel.org # v5.10+
> Reported-by: Tobias Markus <tobias@markus-regensburg.de>
> Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>

Looks reasonable:

Acked-by: David Howells <dhowells@redhat.com>

I wonder, though, if cert_sig_digest_update() should be obtained by some sort
of function pointer.  It doesn't really seem to belong in this file.  But this
is a separate issue.

David


^ permalink raw reply	[flat|nested] 10+ messages in thread
* [PATCH] X.509: Fix crash caused by NULL pointer
@ 2021-01-07  9:28 Tianjia Zhang
  2021-01-07 10:58 ` David Howells
  0 siblings, 1 reply; 10+ messages in thread
From: Tianjia Zhang @ 2021-01-07  9:28 UTC (permalink / raw)
  To: David Howells, Herbert Xu, David S. Miller, Gilad Ben-Yossef,
	Tobias Markus, Tee Hao Wei, keyrings, linux-crypto, linux-kernel,
	stable
  Cc: Tianjia Zhang

On the following call path, `sig->pkey_algo` is not assigned
in asymmetric_key_verify_signature(), which causes runtime
crash in public_key_verify_signature().

  keyctl_pkey_verify
    asymmetric_key_verify_signature
      verify_signature
        public_key_verify_signature

This patch simply check this situation and fixes the crash
caused by NULL pointer.

Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification")
Cc: stable@vger.kernel.org # v5.10+
Reported-by: Tobias Markus <tobias@markus-regensburg.de>
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
---
 crypto/asymmetric_keys/public_key.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c
index 8892908ad58c..788a4ba1e2e7 100644
--- a/crypto/asymmetric_keys/public_key.c
+++ b/crypto/asymmetric_keys/public_key.c
@@ -356,7 +356,8 @@ int public_key_verify_signature(const struct public_key *pkey,
 	if (ret)
 		goto error_free_key;
 
-	if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) {
+	if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 &&
+	    sig->data_size) {
 		ret = cert_sig_digest_update(sig, tfm);
 		if (ret)
 			goto error_free_key;
-- 
2.19.1.3.ge56e4f7


^ permalink raw reply related	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2021-01-22 13:17 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-01-21  9:06 [PATCH] X.509: Fix crash caused by NULL pointer hansyao
  -- strict thread matches above, loose matches on Subject: below --
2021-01-22 12:24  Tan Zhongjun
2021-01-22 12:19  Tan Zhongjun
2021-01-22 13:03 ` Greg KH
2021-01-19  0:13 David Howells
2021-01-13 13:06 David Howells
2021-01-13 13:03 David Howells
2021-01-07  9:28 Tianjia Zhang
2021-01-07 10:58 ` David Howells
2021-01-13  3:02   ` Tianjia Zhang

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