Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Mike Rapoport <rppt@linux.ibm.com>
To:     linux-mm@kvack.org
Cc:     Andrew Morton <akpm@linux-foundation.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Christoph Hellwig <hch@lst.de>,
        "David S. Miller" <davem@davemloft.net>,
        Dennis Zhou <dennis@kernel.org>,
        Geert Uytterhoeven <geert@linux-m68k.org>,
        Greentime Hu <green.hu@gmail.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Guan Xuetao <gxt@pku.edu.cn>, Guo Ren <guoren@kernel.org>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Mark Salter <msalter@redhat.com>,
        Matt Turner <mattst88@gmail.com>,
        Max Filippov <jcmvbkbc@gmail.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Michal Simek <monstr@monstr.eu>,
        Paul Burton <paul.burton@mips.com>,
        Petr Mladek <pmladek@suse.com>, Rich Felker <dalias@libc.org>,
        Richard Weinberger <richard@nod.at>,
        Rob Herring <robh+dt@kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Stafford Horne <shorne@gmail.com>,
        Tony Luck <tony.luck@intel.com>,
        Vineet Gupta <vgupta@synopsys.com>,
        Yoshinori Sato <ysato@users.sourceforge.jp>,
        devicetree@vger.kernel.org, kasan-dev@googlegroups.com,
        linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-c6x-dev@linux-c6x.org, linux-ia64@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
        linux-mips@vger.kernel.org, linux-s390@vger.kernel.org,
        linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org,
        linux-um@lists.infradead.org, linux-usb@vger.kernel.org,
        linux-xtensa@linux-xtensa.org, linuxppc-dev@lists.ozlabs.org,
        openrisc@lists.librecores.org, sparclinux@vger.kernel.org,
        uclinux-h8-devel@lists.sourceforge.jp, x86@kernel.org,
        xen-devel@lists.xenproject.org, Mike Rapoport <rppt@linux.ibm.com>
Subject: [PATCH 07/21] memblock: memblock_phys_alloc(): don't panic
Date:   Wed, 16 Jan 2019 15:44:07 +0200
In-Reply-To: <1547646261-32535-1-git-send-email-rppt@linux.ibm.com>
References: <1547646261-32535-1-git-send-email-rppt@linux.ibm.com>
Message-Id: <1547646261-32535-8-git-send-email-rppt@linux.ibm.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Make the memblock_phys_alloc() function an inline wrapper for
memblock_phys_alloc_range() and update the memblock_phys_alloc() callers to
check the returned value and panic in case of error.

Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
---
 arch/arm/mm/init.c                   | 4 ++++
 arch/arm64/mm/mmu.c                  | 2 ++
 arch/powerpc/sysdev/dart_iommu.c     | 3 +++
 arch/s390/kernel/crash_dump.c        | 3 +++
 arch/s390/kernel/setup.c             | 3 +++
 arch/sh/boards/mach-ap325rxa/setup.c | 3 +++
 arch/sh/boards/mach-ecovec24/setup.c | 6 ++++++
 arch/sh/boards/mach-kfr2r09/setup.c  | 3 +++
 arch/sh/boards/mach-migor/setup.c    | 3 +++
 arch/sh/boards/mach-se/7724/setup.c  | 6 ++++++
 arch/xtensa/mm/kasan_init.c          | 3 +++
 include/linux/memblock.h             | 7 ++++++-
 mm/memblock.c                        | 5 -----
 13 files changed, 45 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index b76b90e..15dddfe 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -206,6 +206,10 @@ phys_addr_t __init arm_memblock_steal(phys_addr_t size, phys_addr_t align)
 	BUG_ON(!arm_memblock_steal_permitted);
 
 	phys = memblock_phys_alloc(size, align);
+	if (!phys)
+		panic("Failed to steal %pa bytes at %pS\n",
+		      &size, (void *)_RET_IP_);
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
index b6f5aa5..a74e4be 100644
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@ -104,6 +104,8 @@ static phys_addr_t __init early_pgtable_alloc(void)
 	void *ptr;
 
 	phys = memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate page table page\n");
 
 	/*
 	 * The FIX_{PGD,PUD,PMD} slots may be in active use, but the FIX_PTE
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c
index 25bc25f..b82c9ff 100644
--- a/arch/powerpc/sysdev/dart_iommu.c
+++ b/arch/powerpc/sysdev/dart_iommu.c
@@ -265,6 +265,9 @@ static void allocate_dart(void)
 	 * prefetching into invalid pages and corrupting data
 	 */
 	tmp = memblock_phys_alloc(DART_PAGE_SIZE, DART_PAGE_SIZE);
+	if (!tmp)
+		panic("DART: table allocation failed\n");
+
 	dart_emptyval = DARTMAP_VALID | ((tmp >> DART_PAGE_SHIFT) &
 					 DARTMAP_RPNMASK);
 
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index 97eae38..f96a585 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -61,6 +61,9 @@ struct save_area * __init save_area_alloc(bool is_boot_cpu)
 	struct save_area *sa;
 
 	sa = (void *) memblock_phys_alloc(sizeof(*sa), 8);
+	if (!sa)
+		panic("Failed to allocate save area\n");
+
 	if (is_boot_cpu)
 		list_add(&sa->list, &dump_save_areas);
 	else
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 72dd23e..da48397 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -968,6 +968,9 @@ static void __init setup_randomness(void)
 
 	vmms = (struct sysinfo_3_2_2 *) memblock_phys_alloc(PAGE_SIZE,
 							    PAGE_SIZE);
+	if (!vmms)
+		panic("Failed to allocate memory for sysinfo structure\n");
+
 	if (stsi(vmms, 3, 2, 2) == 0 && vmms->count)
 		add_device_randomness(&vmms->vm, sizeof(vmms->vm[0]) * vmms->count);
 	memblock_free((unsigned long) vmms, PAGE_SIZE);
diff --git a/arch/sh/boards/mach-ap325rxa/setup.c b/arch/sh/boards/mach-ap325rxa/setup.c
index d7ceab6..08a0cc9 100644
--- a/arch/sh/boards/mach-ap325rxa/setup.c
+++ b/arch/sh/boards/mach-ap325rxa/setup.c
@@ -558,6 +558,9 @@ static void __init ap325rxa_mv_mem_reserve(void)
 	phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 
diff --git a/arch/sh/boards/mach-ecovec24/setup.c b/arch/sh/boards/mach-ecovec24/setup.c
index a3901806..fd264a6 100644
--- a/arch/sh/boards/mach-ecovec24/setup.c
+++ b/arch/sh/boards/mach-ecovec24/setup.c
@@ -1481,11 +1481,17 @@ static void __init ecovec_mv_mem_reserve(void)
 	phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU0 memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 	ceu0_dma_membase = phys;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU1 memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 	ceu1_dma_membase = phys;
diff --git a/arch/sh/boards/mach-kfr2r09/setup.c b/arch/sh/boards/mach-kfr2r09/setup.c
index 55bdf4a..ebe90d06 100644
--- a/arch/sh/boards/mach-kfr2r09/setup.c
+++ b/arch/sh/boards/mach-kfr2r09/setup.c
@@ -632,6 +632,9 @@ static void __init kfr2r09_mv_mem_reserve(void)
 	phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 
diff --git a/arch/sh/boards/mach-migor/setup.c b/arch/sh/boards/mach-migor/setup.c
index ba7eee6..1adff09 100644
--- a/arch/sh/boards/mach-migor/setup.c
+++ b/arch/sh/boards/mach-migor/setup.c
@@ -631,6 +631,9 @@ static void __init migor_mv_mem_reserve(void)
 	phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 
diff --git a/arch/sh/boards/mach-se/7724/setup.c b/arch/sh/boards/mach-se/7724/setup.c
index 4696e10..201631a 100644
--- a/arch/sh/boards/mach-se/7724/setup.c
+++ b/arch/sh/boards/mach-se/7724/setup.c
@@ -966,11 +966,17 @@ static void __init ms7724se_mv_mem_reserve(void)
 	phys_addr_t size = CEU_BUFFER_MEMORY_SIZE;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU0 memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 	ceu0_dma_membase = phys;
 
 	phys = memblock_phys_alloc(size, PAGE_SIZE);
+	if (!phys)
+		panic("Failed to allocate CEU1 memory\n");
+
 	memblock_free(phys, size);
 	memblock_remove(phys, size);
 	ceu1_dma_membase = phys;
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c
index 48dbb03..4852848 100644
--- a/arch/xtensa/mm/kasan_init.c
+++ b/arch/xtensa/mm/kasan_init.c
@@ -54,6 +54,9 @@ static void __init populate(void *start, void *end)
 			phys_addr_t phys =
 				memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE);
 
+			if (!phys)
+				panic("Failed to allocate page table page\n");
+
 			set_pte(pte + j, pfn_pte(PHYS_PFN(phys), PAGE_KERNEL));
 		}
 	}
diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index 66dfdb3..7883c74 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -374,7 +374,12 @@ phys_addr_t memblock_phys_alloc_range(phys_addr_t size, phys_addr_t align,
 phys_addr_t memblock_phys_alloc_nid(phys_addr_t size, phys_addr_t align, int nid);
 phys_addr_t memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid);
 
-phys_addr_t memblock_phys_alloc(phys_addr_t size, phys_addr_t align);
+static inline phys_addr_t memblock_phys_alloc(phys_addr_t size,
+					      phys_addr_t align)
+{
+	return memblock_phys_alloc_range(size, align, 0,
+					 MEMBLOCK_ALLOC_ACCESSIBLE);
+}
 
 void *memblock_alloc_try_nid_raw(phys_addr_t size, phys_addr_t align,
 				 phys_addr_t min_addr, phys_addr_t max_addr,
diff --git a/mm/memblock.c b/mm/memblock.c
index 8aabb1b..461e40a3 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -1382,11 +1382,6 @@ phys_addr_t __init memblock_alloc_base(phys_addr_t size, phys_addr_t align, phys
 	return alloc;
 }
 
-phys_addr_t __init memblock_phys_alloc(phys_addr_t size, phys_addr_t align)
-{
-	return memblock_alloc_base(size, align, MEMBLOCK_ALLOC_ACCESSIBLE);
-}
-
 phys_addr_t __init memblock_phys_alloc_try_nid(phys_addr_t size, phys_addr_t align, int nid)
 {
 	phys_addr_t res = memblock_phys_alloc_nid(size, align, nid);
-- 
2.7.4