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(unknown [172.20.15.234]) by mail.kylinos.cn (NSMail) with ESMTPA id 67E86E000EB9; Wed, 17 Jan 2024 17:00:20 +0800 (CST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: dd89ad63-b516-11ee-98f2-6d05b1d4d9a1 X-UUID: ee76e0f9ed9346d98d9002f4e6f06742-20240117 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:60c887b3-2dea-43c2-9bf1-1657082d5671,IP:10, URL:0,TC:0,Content:-25,EDM:0,RT:0,SF:-3,FILE:0,BULK:0,RULE:Release_Ham,ACT ION:release,TS:-18 X-CID-INFO: VERSION:1.1.35,REQID:60c887b3-2dea-43c2-9bf1-1657082d5671,IP:10,UR L:0,TC:0,Content:-25,EDM:0,RT:0,SF:-3,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-18 X-CID-META: VersionHash:5d391d7,CLOUDID:16dc588e-e2c0-40b0-a8fe-7c7e47299109,B ulkID:2401171700272YDODMF1,BulkQuantity:0,Recheck:0,SF:19|44|101|66|38|24| 100|17|102,TC:nil,Content:0,EDM:-3,IP:-2,URL:11|1,File:nil,Bulk:nil,QS:nil ,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_FAS,TF_CID_SPAM_FSD,TF_CID_SPAM_FSI, TF_CID_SPAM_ULN X-UUID: ee76e0f9ed9346d98d9002f4e6f06742-20240117 X-ns-mid: postfix-65A79728-755627552 From: Kunwu Chan To: jgross@suse.com, boris.ostrovsky@oracle.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, Kunwu Chan , kernel test robot Subject: [PATCH v2] x86/xen: Add some null pointer checking to smp.c Date: Wed, 17 Jan 2024 17:00:18 +0800 Message-Id: <20240117090018.152031-1-chentao@kylinos.cn> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 kasprintf() returns a pointer to dynamically allocated memory which can be NULL upon failure. Ensure the allocation was successful by checking the pointer validity. Signed-off-by: Kunwu Chan Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202401161119.iof6BQsf-lkp@intel.com/ --- v2: Initial rc and return errno in error paths --- arch/x86/xen/smp.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c index 4b0d6fff88de..0ea4f1b2ab21 100644 --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -61,10 +61,14 @@ void xen_smp_intr_free(unsigned int cpu) int xen_smp_intr_init(unsigned int cpu) { - int rc; + int rc = 0; char *resched_name, *callfunc_name, *debug_name; resched_name = kasprintf(GFP_KERNEL, "resched%d", cpu); + if (!resched_name) { + rc = -ENOMEM; + goto fail; + } per_cpu(xen_resched_irq, cpu).name = resched_name; rc = bind_ipi_to_irqhandler(XEN_RESCHEDULE_VECTOR, cpu, @@ -77,6 +81,10 @@ int xen_smp_intr_init(unsigned int cpu) per_cpu(xen_resched_irq, cpu).irq = rc; callfunc_name = kasprintf(GFP_KERNEL, "callfunc%d", cpu); + if (!callfunc_name) { + rc = -ENOMEM; + goto fail; + } per_cpu(xen_callfunc_irq, cpu).name = callfunc_name; rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_VECTOR, cpu, @@ -90,6 +98,10 @@ int xen_smp_intr_init(unsigned int cpu) if (!xen_fifo_events) { debug_name = kasprintf(GFP_KERNEL, "debug%d", cpu); + if (!debug_name) { + rc = -ENOMEM; + goto fail; + } per_cpu(xen_debug_irq, cpu).name = debug_name; rc = bind_virq_to_irqhandler(VIRQ_DEBUG, cpu, xen_debug_interrupt, @@ -101,6 +113,10 @@ int xen_smp_intr_init(unsigned int cpu) } callfunc_name = kasprintf(GFP_KERNEL, "callfuncsingle%d", cpu); + if (!callfunc_name) { + rc = -ENOMEM; + goto fail; + } per_cpu(xen_callfuncsingle_irq, cpu).name = callfunc_name; rc = bind_ipi_to_irqhandler(XEN_CALL_FUNCTION_SINGLE_VECTOR, cpu,