From patchwork Tue Apr 7 03:11:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11477449 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6884B92A for ; Tue, 7 Apr 2020 03:11:30 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2D3E22082D for ; Tue, 7 Apr 2020 03:11:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="pU7vJvQy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D3E22082D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C4DC98E0091; Mon, 6 Apr 2020 23:11:28 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id BFE658E0062; Mon, 6 Apr 2020 23:11:28 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B3EA08E0091; Mon, 6 Apr 2020 23:11:28 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0107.hostedemail.com [216.40.44.107]) by kanga.kvack.org (Postfix) with ESMTP id 96F678E0062 for ; Mon, 6 Apr 2020 23:11:28 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 6387D180AD807 for ; Tue, 7 Apr 2020 03:11:28 +0000 (UTC) X-FDA: 76679583456.21.note34_cd13b5adb42b X-Spam-Summary: 2,0,0,b59d67920e5f8d39,d41d8cd98f00b204,akpm@linux-foundation.org,,RULES_HIT:41:69:355:379:800:960:966:967:973:988:989:1260:1263:1345:1359:1381:1431:1437:1535:1543:1711:1730:1747:1777:1792:2196:2199:2393:2525:2559:2563:2682:2685:2859:2902:2915:2933:2937:2939:2942:2945:2947:2951:2954:3022:3138:3139:3140:3141:3142:3354:3865:3867:3872:3934:3936:3938:3941:3944:3947:3950:3953:3956:3959:4250:4321:4385:5007:6261:6653:7514:7576:7974:8599:9025:9545:10004:10913:11026:11473:11658:11914:12043:12048:12296:12297:12517:12519:12555:12679:12683:12696:12737:12783:12986:14096:14181:14721:21080:21451:21627:21796:21939:21990:30012:30036:30054:30069,0,RBL:198.145.29.99:@linux-foundation.org:.lbl8.mailshell.net-64.100.201.201 62.2.0.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:2,LUA_SUMMARY:none X-HE-Tag: note34_cd13b5adb42b X-Filterd-Recvd-Size: 5077 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf12.hostedemail.com (Postfix) with ESMTP for ; Tue, 7 Apr 2020 03:11:27 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1A15E2082D; Tue, 7 Apr 2020 03:11:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1586229087; bh=P7ZxomeEYK8EoYnLJhAdyD86FInaCC0PlEO5UYZ/n1w=; h=Date:From:To:Subject:In-Reply-To:From; b=pU7vJvQy1EluExvvw6art50GhglkSYF0QEFuFah4KTy1vadIPutdXY+vuj/S8x+3t Ag+ePXqDW7Kud3U8Ey/LvUUVesMWh0qvU8Teuz8c5KdVfzWGrm7mQ2EJLk/uGDZpWF BSk1wLLEK6Xlooe5qY5ID8sXpHKDaQClakNbXD9U= Date: Mon, 06 Apr 2020 20:11:26 -0700 From: Andrew Morton To: adobriyan@gmail.com, akpm@linux-foundation.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org Subject: [patch 139/166] fs/binfmt_elf.c: delete "loc" variable Message-ID: <20200407031126.6z2h97L99%akpm@linux-foundation.org> In-Reply-To: <20200406200254.a69ebd9e08c4074e41ddebaf@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Alexey Dobriyan Subject: fs/binfmt_elf.c: delete "loc" variable "loc" variable became just a wrapper for PT_INTERP ELF header after main ELF header was moved to "bprm->buf". Delete it. Link: http://lkml.kernel.org/r/20200219184847.GA4871@avx2 Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton --- fs/binfmt_elf.c | 32 +++++++++++++++----------------- 1 file changed, 15 insertions(+), 17 deletions(-) --- a/fs/binfmt_elf.c~elf-delete-loc-variable +++ a/fs/binfmt_elf.c @@ -699,15 +699,13 @@ static int load_elf_binary(struct linux_ unsigned long reloc_func_desc __maybe_unused = 0; int executable_stack = EXSTACK_DEFAULT; struct elfhdr *elf_ex = (struct elfhdr *)bprm->buf; - struct { - struct elfhdr interp_elf_ex; - } *loc; + struct elfhdr *interp_elf_ex; struct arch_elf_state arch_state = INIT_ARCH_ELF_STATE; struct mm_struct *mm; struct pt_regs *regs; - loc = kmalloc(sizeof(*loc), GFP_KERNEL); - if (!loc) { + interp_elf_ex = kmalloc(sizeof(*interp_elf_ex), GFP_KERNEL); + if (!interp_elf_ex) { retval = -ENOMEM; goto out_ret; } @@ -772,8 +770,8 @@ static int load_elf_binary(struct linux_ would_dump(bprm, interpreter); /* Get the exec headers */ - retval = elf_read(interpreter, &loc->interp_elf_ex, - sizeof(loc->interp_elf_ex), 0); + retval = elf_read(interpreter, interp_elf_ex, + sizeof(*interp_elf_ex), 0); if (retval < 0) goto out_free_dentry; @@ -807,25 +805,25 @@ out_free_interp: if (interpreter) { retval = -ELIBBAD; /* Not an ELF interpreter */ - if (memcmp(loc->interp_elf_ex.e_ident, ELFMAG, SELFMAG) != 0) + if (memcmp(interp_elf_ex->e_ident, ELFMAG, SELFMAG) != 0) goto out_free_dentry; /* Verify the interpreter has a valid arch */ - if (!elf_check_arch(&loc->interp_elf_ex) || - elf_check_fdpic(&loc->interp_elf_ex)) + if (!elf_check_arch(interp_elf_ex) || + elf_check_fdpic(interp_elf_ex)) goto out_free_dentry; /* Load the interpreter program headers */ - interp_elf_phdata = load_elf_phdrs(&loc->interp_elf_ex, + interp_elf_phdata = load_elf_phdrs(interp_elf_ex, interpreter); if (!interp_elf_phdata) goto out_free_dentry; /* Pass PT_LOPROC..PT_HIPROC headers to arch code */ elf_ppnt = interp_elf_phdata; - for (i = 0; i < loc->interp_elf_ex.e_phnum; i++, elf_ppnt++) + for (i = 0; i < interp_elf_ex->e_phnum; i++, elf_ppnt++) switch (elf_ppnt->p_type) { case PT_LOPROC ... PT_HIPROC: - retval = arch_elf_pt_proc(&loc->interp_elf_ex, + retval = arch_elf_pt_proc(interp_elf_ex, elf_ppnt, interpreter, true, &arch_state); if (retval) @@ -840,7 +838,7 @@ out_free_interp: * the exec syscall. */ retval = arch_check_elf(elf_ex, - !!interpreter, &loc->interp_elf_ex, + !!interpreter, interp_elf_ex, &arch_state); if (retval) goto out_free_dentry; @@ -1056,7 +1054,7 @@ out_free_interp: } if (interpreter) { - elf_entry = load_elf_interp(&loc->interp_elf_ex, + elf_entry = load_elf_interp(interp_elf_ex, interpreter, load_bias, interp_elf_phdata); if (!IS_ERR((void *)elf_entry)) { @@ -1065,7 +1063,7 @@ out_free_interp: * adjustment */ interp_load_addr = elf_entry; - elf_entry += loc->interp_elf_ex.e_entry; + elf_entry += interp_elf_ex->e_entry; } if (BAD_ADDR(elf_entry)) { retval = IS_ERR((void *)elf_entry) ? @@ -1154,7 +1152,7 @@ out_free_interp: start_thread(regs, elf_entry, bprm->p); retval = 0; out: - kfree(loc); + kfree(interp_elf_ex); out_ret: return retval;