linux-kernel - [PATCH -mm 2/3] ELF, coredump: delete duplicated overflow check

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Message-ID: <20191222144009.GB24341@avx2>
Date:   Sun, 22 Dec 2019 17:40:09 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     akpm@...ux-foundation.org
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH -mm 2/3] ELF, coredump: delete duplicated overflow check

array_size() macro will do overflow check anyway.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 fs/binfmt_elf.c |    2 --
 1 file changed, 2 deletions(-)

--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -2257,8 +2257,6 @@ static int elf_core_dump(struct coredump_params *cprm)
 
 	dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
 
-	if (segs - 1 > ULONG_MAX / sizeof(*vma_filesz))
-		goto end_coredump;
 	vma_filesz = kvmalloc(array_size(sizeof(*vma_filesz), (segs - 1)),
 			      GFP_KERNEL);
 	if (ZERO_OR_NULL_PTR(vma_filesz))