treewide: add checks for the return value of memblock_alloc*()

Add check for the return value of memblock_alloc*() functions and call
panic() in case of error.  The panic message repeats the one used by
panicing memblock allocators with adjustment of parameters to include
only relevant ones.

The replacement was mostly automated with semantic patches like the one
below with manual massaging of format strings.

  @@
  expression ptr, size, align;
  @@
  ptr = memblock_alloc(size, align);
  + if (!ptr)
  + 	panic("%s: Failed to allocate %lu bytes align=0x%lx\n", __func__, size, align);

[anders.roxell@linaro.org: use '%pa' with 'phys_addr_t' type]
  Link: http://lkml.kernel.org/r/20190131161046.21886-1-anders.roxell@linaro.org
[rppt@linux.ibm.com: fix format strings for panics after memblock_alloc]
  Link: http://lkml.kernel.org/r/1548950940-15145-1-git-send-email-rppt@linux.ibm.com
[rppt@linux.ibm.com: don't panic if the allocation in sparse_buffer_init fails]
  Link: http://lkml.kernel.org/r/20190131074018.GD28876@rapoport-lnx
[akpm@linux-foundation.org: fix xtensa printk warning]
Link: http://lkml.kernel.org/r/1548057848-15136-20-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Guo Ren <ren_guo@c-sky.com>		[c-sky]
Acked-by: Paul Burton <paul.burton@mips.com>		[MIPS]
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>	[s390]
Reviewed-by: Juergen Gross <jgross@suse.com>		[Xen]
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Acked-by: Max Filippov <jcmvbkbc@gmail.com>		[xtensa]
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christophe Leroy <christophe.leroy@c-s.fr>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Dennis Zhou <dennis@kernel.org>
Cc: Greentime Hu <green.hu@gmail.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Guo Ren <guoren@kernel.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Richard Weinberger <richard@nod.at>
Cc: Rich Felker <dalias@libc.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Rob Herring <robh@kernel.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Stafford Horne <shorne@gmail.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

3 files changed, 23 insertions, 1 deletions

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index d7920f3e76c6..2c642af526ce 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -378,6 +378,10 @@ static void __init setup_lowcore_dat_off(void)
 	 */
 	BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * PAGE_SIZE);
 	lc = memblock_alloc_low(sizeof(*lc), sizeof(*lc));
+	if (!lc)
+		panic("%s: Failed to allocate %zu bytes align=%zx\n",
+		      __func__, sizeof(*lc), sizeof(*lc));
+
 	lc->restart_psw.mask = PSW_KERNEL_BITS;
 	lc->restart_psw.addr = (unsigned long) restart_int_handler;
 	lc->external_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_MCHECK;
@@ -419,6 +423,9 @@ static void __init setup_lowcore_dat_off(void)
 	 * all CPUs in cast *one* of them does a PSW restart.
 	 */
 	restart_stack = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+	if (!restart_stack)
+		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+		      __func__, THREAD_SIZE, THREAD_SIZE);
 	restart_stack += STACK_INIT_OFFSET;
 
 	/*
@@ -495,6 +502,9 @@ static void __init setup_resources(void)
 
 	for_each_memblock(memory, reg) {
 		res = memblock_alloc(sizeof(*res), 8);
+		if (!res)
+			panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+			      __func__, sizeof(*res), 8);
 		res->flags = IORESOURCE_BUSY | IORESOURCE_SYSTEM_RAM;
 
 		res->name = "System RAM";
@@ -509,6 +519,9 @@ static void __init setup_resources(void)
 				continue;
 			if (std_res->end > res->end) {
 				sub_res = memblock_alloc(sizeof(*sub_res), 8);
+				if (!sub_res)
+					panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+					      __func__, sizeof(*sub_res), 8);
 				*sub_res = *std_res;
 				sub_res->end = res->end;
 				std_res->start = res->end + 1;
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 5e3cccc408b8..3fe1c77c361b 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -658,7 +658,7 @@ void __init smp_save_dump_cpus(void)
 	/* Allocate a page as dumping area for the store status sigps */
 	page = memblock_phys_alloc_range(PAGE_SIZE, PAGE_SIZE, 0, 1UL << 31);
 	if (!page)
-		panic("ERROR: Failed to allocate %x bytes below %lx\n",
+		panic("ERROR: Failed to allocate %lx bytes below %lx\n",
 		      PAGE_SIZE, 1UL << 31);
 
 	/* Set multi-threading state to the previous system. */
@@ -770,6 +770,9 @@ void __init smp_detect_cpus(void)
 
 	/* Get CPU information */
 	info = memblock_alloc(sizeof(*info), 8);
+	if (!info)
+		panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+		      __func__, sizeof(*info), 8);
 	smp_get_core_info(info, 1);
 	/* Find boot CPU type */
 	if (sclp.has_core_type) {
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 8992b04c0ade..8964a3f60aad 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -520,6 +520,9 @@ static void __init alloc_masks(struct sysinfo_15_1_x *info,
 	nr_masks = max(nr_masks, 1);
 	for (i = 0; i < nr_masks; i++) {
 		mask->next = memblock_alloc(sizeof(*mask->next), 8);
+		if (!mask->next)
+			panic("%s: Failed to allocate %zu bytes align=0x%x\n",
+			      __func__, sizeof(*mask->next), 8);
 		mask = mask->next;
 	}
 }
@@ -538,6 +541,9 @@ void __init topology_init_early(void)
 	if (!MACHINE_HAS_TOPOLOGY)
 		goto out;
 	tl_info = memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+	if (!tl_info)
+		panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+		      __func__, PAGE_SIZE, PAGE_SIZE);
 	info = tl_info;
 	store_topology(info);
 	pr_info("The CPU configuration topology of the machine is: %d %d %d %d %d %d / %d\n",