The patch titled
Subject: swiotlb: add checks for the return value of memblock_alloc*()
has been added to the -mm tree. Its filename is
swiotlb-add-checks-for-the-return-value-of-memblock_alloc.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/swiotlb-add-checks-for-the-return-value-of-memblock_alloc.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/swiotlb-add-checks-for-the-return-value-of-memblock_alloc.patch
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*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: swiotlb: add checks for the return value of memblock_alloc*()
Add panic() calls if memblock_alloc() returns NULL.
The panic() format duplicates the one used by memblock itself and in order
to avoid explosion with long parameters list replace open coded allocation
size calculations with a local variable.
Link: http://lkml.kernel.org/r/1548057848-15136-19-git-send-email-rppt@xxxxxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Christophe Leroy <christophe.leroy@xxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Dennis Zhou <dennis@xxxxxxxxxx>
Cc: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: Greentime Hu <green.hu@xxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Guan Xuetao <gxt@xxxxxxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: Guo Ren <ren_guo@xxxxxxxxx> [c-sky]
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Juergen Gross <jgross@xxxxxxxx> [Xen]
Cc: Mark Salter <msalter@xxxxxxxxxx>
Cc: Matt Turner <mattst88@xxxxxxxxx>
Cc: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Paul Burton <paul.burton@xxxxxxxx>
Cc: Petr Mladek <pmladek@xxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Rich Felker <dalias@xxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Stafford Horne <shorne@xxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Vineet Gupta <vgupta@xxxxxxxxxxxx>
Cc: Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/dma/swiotlb.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
--- a/kernel/dma/swiotlb.c~swiotlb-add-checks-for-the-return-value-of-memblock_alloc
+++ a/kernel/dma/swiotlb.c
@@ -191,6 +191,7 @@ void __init swiotlb_update_mem_attribute
int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
{
unsigned long i, bytes;
+ size_t alloc_size;
bytes = nslabs << IO_TLB_SHIFT;
@@ -203,12 +204,18 @@ int __init swiotlb_init_with_tbl(char *t
* to find contiguous free memory regions of size up to IO_TLB_SEGSIZE
* between io_tlb_start and io_tlb_end.
*/
- io_tlb_list = memblock_alloc(
- PAGE_ALIGN(io_tlb_nslabs * sizeof(int)),
- PAGE_SIZE);
- io_tlb_orig_addr = memblock_alloc(
- PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t)),
- PAGE_SIZE);
+ alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(int));
+ io_tlb_list = memblock_alloc(alloc_size, PAGE_SIZE);
+ if (!io_tlb_list)
+ panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+ __func__, alloc_size, PAGE_SIZE);
+
+ alloc_size = PAGE_ALIGN(io_tlb_nslabs * sizeof(phys_addr_t));
+ io_tlb_orig_addr = memblock_alloc(alloc_size, PAGE_SIZE);
+ if (!io_tlb_orig_addr)
+ panic("%s: Failed to allocate %lu bytes align=0x%lx\n",
+ __func__, alloc_size, PAGE_SIZE);
+
for (i = 0; i < io_tlb_nslabs; i++) {
io_tlb_list[i] = IO_TLB_SEGSIZE - OFFSET(i, IO_TLB_SEGSIZE);
io_tlb_orig_addr[i] = INVALID_PHYS_ADDR;
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are
powerpc-prefer-memblock-apis-returning-virtual-address.patch
microblaze-prefer-memblock-api-returning-virtual-address.patch
sh-prefer-memblock-apis-returning-virtual-address.patch
openrisc-simplify-pte_alloc_one_kernel.patch
arch-simplify-several-early-memory-allocations.patch
arm-s390-unicore32-remove-oneliner-wrappers-for-memblock_alloc.patch
openrisc-prefer-memblock-apis-returning-virtual-address.patch
memblock-replace-memblock_alloc_baseanywhere-with-memblock_phys_alloc.patch
memblock-drop-memblock_alloc_base_nid.patch
memblock-emphasize-that-memblock_alloc_range-returns-a-physical-address.patch
memblock-memblock_phys_alloc_try_nid-dont-panic.patch
memblock-memblock_phys_alloc-dont-panic.patch
memblock-drop-__memblock_alloc_base.patch
memblock-drop-memblock_alloc_base.patch
memblock-refactor-internal-allocation-functions.patch
memblock-make-memblock_find_in_range_node-and-choose_memblock_flags-static.patch
arch-use-memblock_alloc-instead-of-memblock_alloc_fromsize-align-0.patch
arch-dont-memset0-memory-returned-by-memblock_alloc.patch
ia64-add-checks-for-the-return-value-of-memblock_alloc.patch
sparc-add-checks-for-the-return-value-of-memblock_alloc.patch
mm-percpu-add-checks-for-the-return-value-of-memblock_alloc.patch
init-main-add-checks-for-the-return-value-of-memblock_alloc.patch
swiotlb-add-checks-for-the-return-value-of-memblock_alloc.patch
treewide-add-checks-for-the-return-value-of-memblock_alloc.patch
memblock-memblock_alloc_try_nid-dont-panic.patch
memblock-drop-memblock_alloc__nopanic-variants.patch
