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From: rppt@linux.ibm.com (Mike Rapoport)
To: linux-snps-arc@lists.infradead.org
Subject: [PATCH v2 15/21] sparc: add checks for the return value of memblock_alloc*()
Date: Mon, 21 Jan 2019 10:04:02 +0200
Message-ID: <1548057848-15136-16-git-send-email-rppt@linux.ibm.com> (raw)
In-Reply-To: <1548057848-15136-1-git-send-email-rppt@linux.ibm.com>

Add panic() calls if memblock_alloc*() returns NULL.

Most of the changes are simply addition of

        if(!ptr)
                panic();

statements after the calls to memblock_alloc*() variants.

Exceptions are pcpu_populate_pte() and kernel_map_range() that were
slightly refactored to accommodate the change.

Signed-off-by: Mike Rapoport <rppt at linux.ibm.com>
Acked-by: David S. Miller <davem at davemloft.net>
---
 arch/sparc/kernel/prom_32.c  |  2 ++
 arch/sparc/kernel/setup_64.c |  6 ++++++
 arch/sparc/kernel/smp_64.c   | 12 ++++++++++++
 arch/sparc/mm/init_64.c      | 11 +++++++++++
 arch/sparc/mm/srmmu.c        |  8 ++++++++
 5 files changed, 39 insertions(+)

diff --git a/arch/sparc/kernel/prom_32.c b/arch/sparc/kernel/prom_32.c
index e7126ca..869b16c 100644
--- a/arch/sparc/kernel/prom_32.c
+++ b/arch/sparc/kernel/prom_32.c
@@ -33,6 +33,8 @@ void * __init prom_early_alloc(unsigned long size)
 	void *ret;
 
 	ret = memblock_alloc(size, SMP_CACHE_BYTES);
+	if (!ret)
+		panic("%s: Failed to allocate %lu bytes\n", __func__, size);
 
 	prom_early_allocated += size;
 
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index 51c4d12..fd2182a 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -624,8 +624,14 @@ void __init alloc_irqstack_bootmem(void)
 
 		softirq_stack[i] = memblock_alloc_node(THREAD_SIZE,
 						       THREAD_SIZE, node);
+		if (!softirq_stack[i])
+			panic("%s: Failed to allocate %lu bytes align=%lx nid=%d\n",
+			      __func__, THREAD_SIZE, THREAD_SIZE, node);
 		hardirq_stack[i] = memblock_alloc_node(THREAD_SIZE,
 						       THREAD_SIZE, node);
+		if (!hardirq_stack[i])
+			panic("%s: Failed to allocate %lu bytes align=%lx nid=%d\n",
+			      __func__, THREAD_SIZE, THREAD_SIZE, node);
 	}
 }
 
diff --git a/arch/sparc/kernel/smp_64.c b/arch/sparc/kernel/smp_64.c
index f45d876..a8275fe 100644
--- a/arch/sparc/kernel/smp_64.c
+++ b/arch/sparc/kernel/smp_64.c
@@ -1628,6 +1628,8 @@ static void __init pcpu_populate_pte(unsigned long addr)
 		pud_t *new;
 
 		new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+		if (!new)
+			goto err_alloc;
 		pgd_populate(&init_mm, pgd, new);
 	}
 
@@ -1636,6 +1638,8 @@ static void __init pcpu_populate_pte(unsigned long addr)
 		pmd_t *new;
 
 		new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+		if (!new)
+			goto err_alloc;
 		pud_populate(&init_mm, pud, new);
 	}
 
@@ -1644,8 +1648,16 @@ static void __init pcpu_populate_pte(unsigned long addr)
 		pte_t *new;
 
 		new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+		if (!new)
+			goto err_alloc;
 		pmd_populate_kernel(&init_mm, pmd, new);
 	}
+
+	return;
+
+err_alloc:
+	panic("%s: Failed to allocate %lu bytes align=%lx from=%lx\n",
+	      __func__, PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
 }
 
 void __init setup_per_cpu_areas(void)
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index ef340e8..f2d70ff 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -1809,6 +1809,8 @@ static unsigned long __ref kernel_map_range(unsigned long pstart,
 
 			new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE,
 						  PAGE_SIZE);
+			if (!new)
+				goto err_alloc;
 			alloc_bytes += PAGE_SIZE;
 			pgd_populate(&init_mm, pgd, new);
 		}
@@ -1822,6 +1824,8 @@ static unsigned long __ref kernel_map_range(unsigned long pstart,
 			}
 			new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE,
 						  PAGE_SIZE);
+			if (!new)
+				goto err_alloc;
 			alloc_bytes += PAGE_SIZE;
 			pud_populate(&init_mm, pud, new);
 		}
@@ -1836,6 +1840,8 @@ static unsigned long __ref kernel_map_range(unsigned long pstart,
 			}
 			new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE,
 						  PAGE_SIZE);
+			if (!new)
+				goto err_alloc;
 			alloc_bytes += PAGE_SIZE;
 			pmd_populate_kernel(&init_mm, pmd, new);
 		}
@@ -1855,6 +1861,11 @@ static unsigned long __ref kernel_map_range(unsigned long pstart,
 	}
 
 	return alloc_bytes;
+
+err_alloc:
+	panic("%s: Failed to allocate %lu bytes align=%lx from=%lx\n",
+	      __func__, PAGE_SIZE, PAGE_SIZE, PAGE_SIZE);
+	return -ENOMEM;
 }
 
 static void __init flush_all_kernel_tsbs(void)
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index a400ec3..aaebbc0 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -305,11 +305,17 @@ static void __init srmmu_nocache_init(void)
 
 	srmmu_nocache_pool = memblock_alloc(srmmu_nocache_size,
 					    SRMMU_NOCACHE_ALIGN_MAX);
+	if (!srmmu_nocache_pool)
+		panic("%s: Failed to allocate %lu bytes align=0x%x\n",
+		      __func__, srmmu_nocache_size, SRMMU_NOCACHE_ALIGN_MAX);
 	memset(srmmu_nocache_pool, 0, srmmu_nocache_size);
 
 	srmmu_nocache_bitmap =
 		memblock_alloc(BITS_TO_LONGS(bitmap_bits) * sizeof(long),
 			       SMP_CACHE_BYTES);
+	if (!srmmu_nocache_bitmap)
+		panic("%s: Failed to allocate %zu bytes\n", __func__,
+		      BITS_TO_LONGS(bitmap_bits) * sizeof(long));
 	bit_map_init(&srmmu_nocache_map, srmmu_nocache_bitmap, bitmap_bits);
 
 	srmmu_swapper_pg_dir = __srmmu_get_nocache(SRMMU_PGD_TABLE_SIZE, SRMMU_PGD_TABLE_SIZE);
@@ -468,6 +474,8 @@ static void __init sparc_context_init(int numctx)
 
 	size = numctx * sizeof(struct ctx_list);
 	ctx_list_pool = memblock_alloc(size, SMP_CACHE_BYTES);
+	if (!ctx_list_pool)
+		panic("%s: Failed to allocate %lu bytes\n", __func__, size);
 
 	for (ctx = 0; ctx < numctx; ctx++) {
 		struct ctx_list *clist;
-- 
2.7.4

  parent reply index

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-21  8:03 [PATCH v2 00/21] Refine memblock API rppt
2019-01-21  8:03 ` [PATCH v2 01/21] openrisc: prefer memblock APIs returning virtual address rppt
2019-01-27  3:07   ` shorne
2019-01-21  8:03 ` [PATCH v2 02/21] powerpc: use memblock functions " rppt
2019-01-29  9:52   ` mpe
2019-01-21  8:03 ` [PATCH v2 03/21] memblock: replace memblock_alloc_base(ANYWHERE) with memblock_phys_alloc rppt
2019-01-21  8:03 ` [PATCH v2 04/21] memblock: drop memblock_alloc_base_nid() rppt
2019-01-21  8:03 ` [PATCH v2 05/21] memblock: emphasize that memblock_alloc_range() returns a physical address rppt
2019-01-21  8:03 ` [PATCH v2 06/21] memblock: memblock_phys_alloc_try_nid(): don't panic rppt
2019-01-25 17:45   ` catalin.marinas
2019-01-25 19:32     ` rppt
2019-01-29  9:56   ` mpe
2019-01-29  9:58     ` mpe
2019-01-21  8:03 ` [PATCH v2 07/21] memblock: memblock_phys_alloc(): " rppt
2019-01-21  8:03 ` [PATCH v2 08/21] memblock: drop __memblock_alloc_base() rppt
2019-01-21  8:03 ` [PATCH v2 09/21] memblock: drop memblock_alloc_base() rppt
2019-01-29 10:29   ` mpe
2019-01-21  8:03 ` [PATCH v2 10/21] memblock: refactor internal allocation functions rppt
2019-02-03  9:39   ` mpe
2019-02-03 10:04     ` rppt
2019-01-21  8:03 ` [PATCH v2 11/21] memblock: make memblock_find_in_range_node() and choose_memblock_flags() static rppt
2019-01-21  8:03 ` [PATCH v2 12/21] arch: use memblock_alloc() instead of memblock_alloc_from(size, align, 0) rppt
2019-01-21  8:04 ` [PATCH v2 13/21] arch: don't memset(0) memory returned by memblock_alloc() rppt
2019-01-21  8:04 ` [PATCH v2 14/21] ia64: add checks for the return value of memblock_alloc*() rppt
2019-01-21  8:04 ` rppt [this message]
2019-01-21  8:04 ` [PATCH v2 16/21] mm/percpu: " rppt
2019-01-21  8:04 ` [PATCH v2 17/21] init/main: " rppt
2019-01-21  8:04 ` [PATCH v2 18/21] swiotlb: " rppt
2019-01-21  8:04 ` [PATCH v2 19/21] treewide: " rppt
2019-01-21  8:39   ` geert
2019-01-21 17:18   ` robh
2019-01-31  6:07   ` christophe.leroy
2019-01-31  6:41     ` rppt
2019-01-31  6:44       ` christophe.leroy
2019-01-31  7:07         ` christophe.leroy
2019-01-31  7:14           ` rppt
2019-01-31 15:23   ` jcmvbkbc
2019-01-21  8:04 ` [PATCH v2 20/21] memblock: memblock_alloc_try_nid: don't panic rppt
2019-01-21  8:04 ` [PATCH v2 21/21] memblock: drop memblock_alloc_*_nopanic() variants rppt
2019-01-30 13:38   ` pmladek
2019-09-24 17:52 ` [PATCH v2 00/21] Refine memblock API aford173
2019-09-25 12:12   ` festevam
2019-09-25 12:17     ` aford173
2019-09-25 15:17       ` festevam
2019-09-26 13:09         ` aford173
2019-09-26 16:04           ` rppt
2019-09-26 19:35             ` aford173
2019-09-28  7:33               ` rppt
2019-09-29 13:33                 ` aford173
2019-10-02  0:14                   ` aford173
2019-10-02  7:36                     ` rppt
2019-10-02 11:14                       ` aford173

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