From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au> Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v4 01/45] powerpc/kasan: Fix error detection on memory allocation Date: Tue, 19 May 2020 05:48:43 +0000 (UTC) [thread overview] Message-ID: <7cb8ca82042bfc45a5cfe726c921cd7e7eeb12a3.1589866984.git.christophe.leroy@csgroup.eu> (raw) In-Reply-To: <cover.1589866984.git.christophe.leroy@csgroup.eu> In case (k_start & PAGE_MASK) doesn't equal (kstart), 'va' will never be NULL allthough 'block' is NULL Check the return of memblock_alloc() directly instead of the resulting address in the loop. Fixes: 509cd3f2b473 ("powerpc/32: Simplify KASAN init") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- arch/powerpc/mm/kasan/kasan_init_32.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c index cbcad369fcb2..8b15fe09b967 100644 --- a/arch/powerpc/mm/kasan/kasan_init_32.c +++ b/arch/powerpc/mm/kasan/kasan_init_32.c @@ -76,15 +76,14 @@ static int __init kasan_init_region(void *start, size_t size) return ret; block = memblock_alloc(k_end - k_start, PAGE_SIZE); + if (!block) + return -ENOMEM; for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) { pmd_t *pmd = pmd_ptr_k(k_cur); void *va = block + k_cur - k_start; pte_t pte = pfn_pte(PHYS_PFN(__pa(va)), PAGE_KERNEL); - if (!va) - return -ENOMEM; - __set_pte_at(&init_mm, k_cur, pte_offset_kernel(pmd, k_cur), pte, 0); } flush_tlb_kernel_range(k_start, k_end); -- 2.25.0
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Benjamin Herrenschmidt <benh@kernel.crashing.org>, Paul Mackerras <paulus@samba.org>, Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH v4 01/45] powerpc/kasan: Fix error detection on memory allocation Date: Tue, 19 May 2020 05:48:43 +0000 (UTC) [thread overview] Message-ID: <7cb8ca82042bfc45a5cfe726c921cd7e7eeb12a3.1589866984.git.christophe.leroy@csgroup.eu> (raw) In-Reply-To: <cover.1589866984.git.christophe.leroy@csgroup.eu> In case (k_start & PAGE_MASK) doesn't equal (kstart), 'va' will never be NULL allthough 'block' is NULL Check the return of memblock_alloc() directly instead of the resulting address in the loop. Fixes: 509cd3f2b473 ("powerpc/32: Simplify KASAN init") Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- arch/powerpc/mm/kasan/kasan_init_32.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c index cbcad369fcb2..8b15fe09b967 100644 --- a/arch/powerpc/mm/kasan/kasan_init_32.c +++ b/arch/powerpc/mm/kasan/kasan_init_32.c @@ -76,15 +76,14 @@ static int __init kasan_init_region(void *start, size_t size) return ret; block = memblock_alloc(k_end - k_start, PAGE_SIZE); + if (!block) + return -ENOMEM; for (k_cur = k_start & PAGE_MASK; k_cur < k_end; k_cur += PAGE_SIZE) { pmd_t *pmd = pmd_ptr_k(k_cur); void *va = block + k_cur - k_start; pte_t pte = pfn_pte(PHYS_PFN(__pa(va)), PAGE_KERNEL); - if (!va) - return -ENOMEM; - __set_pte_at(&init_mm, k_cur, pte_offset_kernel(pmd, k_cur), pte, 0); } flush_tlb_kernel_range(k_start, k_end); -- 2.25.0
next prev parent reply other threads:[~2020-05-19 5:48 UTC|newest] Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-19 5:48 [PATCH v4 00/45] Use hugepages to map kernel mem on 8xx Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy [this message] 2020-05-19 5:48 ` [PATCH v4 01/45] powerpc/kasan: Fix error detection on memory allocation Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 02/45] powerpc/kasan: Fix issues by lowering KASAN_SHADOW_END Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 03/45] powerpc/kasan: Fix shadow pages allocation failure Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 04/45] powerpc/kasan: Remove unnecessary page table locking Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 05/45] powerpc/kasan: Refactor update of early shadow mappings Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 06/45] powerpc/kasan: Declare kasan_init_region() weak Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 07/45] powerpc/ptdump: Limit size of flags text to 1/2 chars on PPC32 Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-25 5:15 ` Michael Ellerman 2020-05-25 5:15 ` Michael Ellerman 2020-05-25 11:06 ` Christophe Leroy 2020-05-25 11:06 ` Christophe Leroy 2020-05-26 12:53 ` Michael Ellerman 2020-05-26 12:53 ` Michael Ellerman 2020-05-19 5:48 ` [PATCH v4 08/45] powerpc/ptdump: Reorder flags Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 09/45] powerpc/ptdump: Add _PAGE_COHERENT flag Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 10/45] powerpc/ptdump: Display size of BATs Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 11/45] powerpc/ptdump: Standardise display of BAT flags Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 12/45] powerpc/ptdump: Properly handle non standard page size Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 13/45] powerpc/ptdump: Handle hugepd at PGD level Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 14/45] powerpc/32s: Don't warn when mapping RO data ROX Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-25 5:40 ` Michael Ellerman 2020-05-25 5:40 ` Michael Ellerman 2020-05-19 5:48 ` [PATCH v4 15/45] powerpc/mm: Allocate static page tables for fixmap Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:48 ` [PATCH v4 16/45] powerpc/mm: Fix conditions to perform MMU specific management by blocks on PPC32 Christophe Leroy 2020-05-19 5:48 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 17/45] powerpc/mm: PTE_ATOMIC_UPDATES is only for 40x Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 18/45] powerpc/mm: Refactor pte_update() on nohash/32 Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 19/45] powerpc/mm: Refactor pte_update() on book3s/32 Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 20/45] powerpc/mm: Standardise __ptep_test_and_clear_young() params between PPC32 and PPC64 Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 21/45] powerpc/mm: Standardise pte_update() prototype " Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 22/45] powerpc/mm: Create a dedicated pte_update() for 8xx Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 23/45] powerpc/mm: Reduce hugepd size for 8M hugepages on 8xx Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 24/45] powerpc/8xx: Drop CONFIG_8xx_COPYBACK option Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 25/45] powerpc/8xx: Prepare handlers for _PAGE_HUGE for 512k pages Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 26/45] powerpc/8xx: Manage 512k huge pages as standard pages Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 27/45] powerpc/8xx: Only 8M pages are hugepte pages now Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 28/45] powerpc/8xx: MM_SLICE is not needed anymore Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 29/45] powerpc/8xx: Move PPC_PIN_TLB options into 8xx Kconfig Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 30/45] powerpc/8xx: Add function to set pinned TLBs Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 31/45] powerpc/8xx: Don't set IMMR map anymore at boot Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 32/45] powerpc/8xx: Always pin TLBs at startup Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 33/45] powerpc/8xx: Drop special handling of Linear and IMMR mappings in I/D TLB handlers Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 34/45] powerpc/8xx: Remove now unused TLB miss functions Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 35/45] powerpc/8xx: Move DTLB perf handling closer Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 36/45] powerpc/mm: Don't be too strict with _etext alignment on PPC32 Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 37/45] powerpc/8xx: Refactor kernel address boundary comparison Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 38/45] powerpc/8xx: Add a function to early map kernel via huge pages Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 39/45] powerpc/8xx: Map IMMR with a huge page Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 40/45] powerpc/8xx: Map linear memory with huge pages Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 41/45] powerpc/8xx: Allow STRICT_KERNEL_RwX with pinned TLB Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 42/45] powerpc/8xx: Allow large TLBs with DEBUG_PAGEALLOC Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 43/45] powerpc/8xx: Implement dedicated kasan_init_region() Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 44/45] powerpc/32s: Allow mapping with BATs with DEBUG_PAGEALLOC Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-05-19 5:49 ` [PATCH v4 45/45] powerpc/32s: Implement dedicated kasan_init_region() Christophe Leroy 2020-05-19 5:49 ` Christophe Leroy 2020-06-09 5:28 ` [PATCH v4 00/45] Use hugepages to map kernel mem on 8xx Michael Ellerman
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