From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Tom Lendacky <thomas.lendacky@amd.com>,
Gary R Hook <gary.hook@amd.com>,
Herbert Xu <herbert@gondor.apana.org.au>
Subject: [PATCH 4.18 11/22] crypto: ccp - Check for NULL PSP pointer at module unload
Date: Thu, 16 Aug 2018 20:45:27 +0200 [thread overview]
Message-ID: <20180816171556.956609959@linuxfoundation.org> (raw)
In-Reply-To: <20180816171556.502583508@linuxfoundation.org>
4.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Tom Lendacky <thomas.lendacky@amd.com>
commit afb31cd2d1a1bc3ca055fb2519ec4e9ab969ffe0 upstream.
Should the PSP initialization fail, the PSP data structure will be
freed and the value contained in the sp_device struct set to NULL.
At module unload, psp_dev_destroy() does not check if the pointer
value is NULL and will end up dereferencing a NULL pointer.
Add a pointer check of the psp_data field in the sp_device struct
in psp_dev_destroy() and return immediately if it is NULL.
Cc: <stable@vger.kernel.org> # 4.16.x-
Fixes: 2a6170dfe755 ("crypto: ccp: Add Platform Security Processor (PSP) device support")
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Gary R Hook <gary.hook@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/crypto/ccp/psp-dev.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -856,6 +856,9 @@ void psp_dev_destroy(struct sp_device *s
{
struct psp_device *psp = sp->psp_data;
+ if (!psp)
+ return;
+
if (psp->sev_misc)
kref_put(&misc_dev->refcount, sev_exit);
next prev parent reply other threads:[~2018-08-16 18:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-16 18:45 [PATCH 4.18 00/22] 4.18.2-stable review Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 01/22] x86/l1tf: Fix build error seen if CONFIG_KVM_INTEL is disabled Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 02/22] x86: i8259: Add missing include file Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 03/22] x86/hyper-v: Check for VP_INVAL in hyperv_flush_tlb_others() Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 04/22] x86/platform/UV: Mark memblock related init code and data correctly Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 05/22] x86/mm/pti: Clear Global bit more aggressively Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 06/22] xen/pv: Call get_cpu_address_sizes to set x86_virt/phys_bits Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 07/22] x86/mm: Disable ioremap free page handling on x86-PAE Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 08/22] kbuild: verify that $DEPMOD is installed Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 09/22] crypto: ccree - fix finup Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 10/22] crypto: ccree - fix iv handling Greg Kroah-Hartman
2018-08-16 18:45 ` Greg Kroah-Hartman [this message]
2018-08-16 18:45 ` [PATCH 4.18 12/22] crypto: ccp - Fix command completion detection race Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 13/22] crypto: x86/sha256-mb - fix digest copy in sha256_mb_mgr_get_comp_job_avx2() Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 14/22] crypto: vmac - require a block cipher with 128-bit block size Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 15/22] crypto: vmac - separate tfm and request context Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 16/22] crypto: blkcipher - fix crash flushing dcache in error path Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 17/22] crypto: ablkcipher " Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 18/22] crypto: skcipher - fix aligning block size in skcipher_copy_iv() Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 19/22] crypto: skcipher - fix crash flushing dcache in error path Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 20/22] Bluetooth: hidp: buffer overflow in hidp_process_report Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 21/22] ioremap: Update pgtable free interfaces with addr Greg Kroah-Hartman
2018-08-16 18:45 ` [PATCH 4.18 22/22] x86/mm: Add TLB purge to free pmd/pte page interfaces Greg Kroah-Hartman
2018-08-17 17:18 ` [PATCH 4.18 00/22] 4.18.2-stable review Guenter Roeck
2018-08-17 17:25 ` Greg Kroah-Hartman
2018-08-18 14:21 ` Rafael David Tinoco
2018-08-18 15:22 ` Greg Kroah-Hartman
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