From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 65B36C4321D for ; Fri, 17 Aug 2018 17:17:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 15B3A21A39 for ; Fri, 17 Aug 2018 17:17:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="oYiFV/5/" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 15B3A21A39 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727993AbeHQUVr (ORCPT ); Fri, 17 Aug 2018 16:21:47 -0400 Received: from mail-ua1-f68.google.com ([209.85.222.68]:41195 "EHLO mail-ua1-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726888AbeHQUVq (ORCPT ); Fri, 17 Aug 2018 16:21:46 -0400 Received: by mail-ua1-f68.google.com with SMTP id h1-v6so6130744uao.8; Fri, 17 Aug 2018 10:17:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:reply-to:from:date:message-id:subject:to:cc; bh=/6G56r5YHBe2OBvIZgMZ2iGTeX4rr6xZ5DGTpDV03qM=; b=oYiFV/5/a4gwKzf9ZVjYPL6GFq+mq7u6ac/Tz57iq/bgdiIEylbqnjKHZfptk/PaHt 8TzD2rMwug2cKhO60eCEffV/RgSH/bvbncXy3OA6p82kXvZOd0sE6PoPYoKp7Nf67yRn XV8JZMsliMFQtKSxtUfXkmDGquLQJhk2/2d2757vvTETayQn9WbtO83W5gLhPwCZXO59 PgxGey0E00sE4+7YS6GWkjQvce87lg69Pi4lwbzPkaQIOqs7x07HuNQxXAc9m2byA2Yu h/OGQQxFn7+z1l9xd3nFMWw4LEBPhZDKO3EGrKDTwMeh8Qb6mA8Uw/Ba8qcJEOeT3iYt o5UQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:reply-to:from:date:message-id :subject:to:cc; bh=/6G56r5YHBe2OBvIZgMZ2iGTeX4rr6xZ5DGTpDV03qM=; b=t0BZdumhOaE/kpXtDRde77cONu9osCj49gaR6Ghdi7mEV73QDSBW9jFH5f7QjiQpfx zyyqzdnX4x9qthuKsjaihqlcPMDr1T/LHFjxCV8Fa22u+i3z70i9uEx1d31CEOoxsTKE TsomykCTYmWAoOEN1jtywZj10kOo7L/xN/ov5Fr5uewMMBALUMx4SO8k69WLv4XZ7Cke 2v3XMYWc8PTkesh07MEvHCHpWsCW35pmf2P6HV1lin7Liq0aSX+wEgtsKTNEj/JlJ1Mm ZfIluly4m96lwCktpjX+uBBIECkqIcxQBNVLwjVoISOpB/RINFyB6GEnCJdmxNYdcYYt nnvA== X-Gm-Message-State: AOUpUlFfX77GPdRqOq3kz9nxqtuumOdE5hLdoDs5KeAyx+FwoKhYPg56 TauDlaLQlWynfpNyVO1mWkhiNePiiV+zB4lzOYo1yuQScw== X-Google-Smtp-Source: AA+uWPwBcR7ySBJRkNOdLdzjQ1ahWybAmlbcV8z2BIaNcHYj+p3c4b1CTYeY/cmjrrbc8JeVbu+e3vabS2VOJ+xcqjI= X-Received: by 2002:ab0:51d2:: with SMTP id h18-v6mr23665657uaa.165.1534526254756; Fri, 17 Aug 2018 10:17:34 -0700 (PDT) MIME-Version: 1.0 Received: by 2002:a67:e915:0:0:0:0:0 with HTTP; Fri, 17 Aug 2018 10:17:14 -0700 (PDT) Reply-To: whiteheadm@acm.org From: tedheadster Date: Fri, 17 Aug 2018 13:17:14 -0400 Message-ID: Subject: Allocation failure with subsequent kernel crash To: Linux Kernel Mailing List , netdev Cc: Ingo Molnar , Thomas Gleixner , ast@kernel.org, daniel@iogearbox.net Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org I have been trying to bisect this crash but I have not found a reliable reproducer. My best guess is that it was introduced after the 4.14 release. This is a 32 bit kernel. It is odd in that it first generates a memory allocation failure, and then quickly crashes with a succeeding bug. I'm including the netdev group since there is a lot of BPF stacktrace. [ 42.512745] systemd: vmalloc: allocation failure: 0 bytes, mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) [ 42.526396] CPU: 0 PID: 1 Comm: systemd Not tainted 4.14.0.bisect-4.k5-tsc-desktop+ #168 [ 42.535878] Hardware name: AX5TC/AX5TC, BIOS 4.51 PG 03/23/98 [ 42.540944] Call Trace: [ 42.550334] dump_stack+0x16/0x18 [ 42.558519] warn_alloc+0xa3/0x10b [ 42.563844] __vmalloc_node_range+0x170/0x17d [ 42.574293] __vmalloc_node+0x35/0x3a [ 42.586454] ? bpf_check+0x52/0x2c64 [ 42.594504] vzalloc+0x21/0x23 [ 42.602499] ? bpf_check+0x52/0x2c64 [ 42.614418] bpf_check+0x52/0x2c64 [ 42.622623] ? slob_page_alloc+0x130/0x177 [ 42.642524] ? vmap_page_range_noflush+0xe/0x109 [ 42.655415] ? slob_page_alloc+0x130/0x177 [ 42.666466] ? native_io_delay+0x8/0x2e [ 42.674455] ? tk_clock_read+0xa/0xd [ 42.685808] ? timekeeping_get_ns+0x10/0x70 [ 42.688097] ? ktime_get_with_offset+0x49/0x66 [ 42.702478] bpf_prog_load+0x2fc/0x442 [ 42.710467] ? bpf_prog_load+0x2fc/0x442 [ 42.722474] ? bpf_prog_array_alloc+0x1b/0x24 [ 42.734478] ? bpf_prog_array_alloc+0x1b/0x24 [ 42.746532] ? compute_effective_progs+0x5c/0xb7 [ 42.758492] ? css_next_descendant_pre+0xa/0x43 [ 42.766488] ? cap_capable+0xa/0x5d [ 42.778457] ? security_capable+0x2d/0x40 [ 42.786537] ? __copy_from_user_ll_nocache_nozero+0xb/0x37 [ 42.799175] ? __copy_user_ll+0xd/0xf [ 42.810492] ? security_bpf+0xc/0x3b [ 42.816807] SyS_bpf+0x7f7/0xd79 [ 42.822333] ? __rcu_read_unlock+0x9/0x4b [ 42.834457] ? mntput_no_expire+0x28/0x119 [ 42.842525] do_int80_syscall_32+0x45/0x57 [ 42.854449] ? do_int80_syscall_32+0x45/0x57 [ 42.866486] entry_INT80_32+0x27/0x27 [ 42.878299] EIP: 0xb7a95082 [ 42.881808] EFLAGS: 00000246 CPU: 0 [ 42.886454] EAX: ffffffda EBX: 00000005 ECX: bfe76e40 EDX: 00000048 [ 42.902452] ESI: 00000040 EDI: 00000000 EBP: 00a8a458 ESP: bfe76e0c [ 42.918413] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 42.932627] Mem-Info: [ 42.936616] active_anon:845 inactive_anon:31 isolated_anon:0 [ 42.936616] active_file:4364 inactive_file:9478 isolated_file:0 [ 42.936616] unevictable:0 dirty:428 writeback:0 unstable:0 [ 42.936616] slab_reclaimable:0 slab_unreclaimable:0 [ 42.936616] mapped:4966 shmem:54 pagetables:46 bounce:0 [ 42.936616] free:47214 free_pcp:25 free_cma:0 [ 42.946479] Node 0 active_anon:3380kB inactive_anon:124kB active_file:17456kB inactive_file:37912kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:19928kB dirty:1720kB writeback:0kB shmem:216kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no [ 42.958503] Normal free:188856kB min:2012kB low:2512kB high:3012kB active_anon:3380kB inactive_anon:124kB active_file:17456kB inactive_file:37912kB unevictable:0kB writepending:1732kB present:261756kB managed:254168kB mlocked:0kB kernel_stack:328kB pagetables:184kB bounce:0kB free_pcp:100kB local_pcp:100kB free_cma:0kB [ 42.970387] lowmem_reserve[]: 0 0 [ 42.978444] Normal: 26*4kB (U) 34*8kB (UM) 10*16kB (UM) 5*32kB (U) 4*64kB (U) 4*128kB (U) 4*256kB (UM) 0*512kB 2*1024kB (U) 0*2048kB 45*4096kB (M) = 188856kB [ 42.986472] 13897 total pagecache pages [ 42.998400] 0 pages in swap cache [ 43.007903] Swap cache stats: add 0, delete 0, find 0/0 [ 43.010200] Free swap = 0kB [ 43.013762] Total swap = 0kB [ 43.024725] 65439 pages RAM [ 43.034360] 0 pages HighMem/MovableOnly [ 43.046385] 1897 pages reserved [ 43.054521] BUG: unable to handle kernel NULL pointer dereference at 00000004 [ 43.058026] IP: free_used_maps+0xe/0x2a [ 43.058026] *pde = 00000000 [ 43.058026] Oops: 0000 [#1] PREEMPT [ 43.058026] Modules linked in: uhci_hcd ehci_pci ehci_hcd usbcore 3c59x i2c_piix4 i2c_core mii usb_common autofs4 [ 43.058026] CPU: 0 PID: 1 Comm: systemd Not tainted 4.14.0.bisect-4.k5-tsc-desktop+ #168 [ 43.058026] Hardware name: AX5TC/AX5TC, BIOS 4.51 PG 03/23/98 [ 43.058026] task: c00177c0 task.stack: c0032000 [ 43.058026] EIP: free_used_maps+0xe/0x2a [ 43.058026] EFLAGS: 00010246 CPU: 0 [ 43.058026] EAX: 00000000 EBX: 00000000 ECX: cfdf60b0 EDX: cff95274 [ 43.058026] ESI: 00000000 EDI: 00000008 EBP: c0033e50 ESP: c0033e48 [ 43.058026] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068 [ 43.058026] CR0: 80050033 CR2: 00000004 CR3: 0034b000 CR4: 00000010 [ 43.058026] Call Trace: [ 43.058026] bpf_prog_load+0x3ce/0x442 [ 43.058026] ? bpf_prog_array_alloc+0x1b/0x24 [ 43.058026] ? bpf_prog_array_alloc+0x1b/0x24 [ 43.058026] ? compute_effective_progs+0x5c/0xb7 [ 43.058026] ? css_next_descendant_pre+0xa/0x43 [ 43.058026] ? cap_capable+0xa/0x5d [ 43.058026] ? security_capable+0x2d/0x40 [ 43.058026] ? __copy_from_user_ll_nocache_nozero+0xb/0x37 [ 43.058026] ? __copy_user_ll+0xd/0xf [ 43.058026] ? security_bpf+0xc/0x3b [ 43.058026] SyS_bpf+0x7f7/0xd79 [ 43.058026] ? __rcu_read_unlock+0x9/0x4b [ 43.058026] ? mntput_no_expire+0x28/0x119 [ 43.058026] do_int80_syscall_32+0x45/0x57 [ 43.058026] ? do_int80_syscall_32+0x45/0x57 [ 43.058026] entry_INT80_32+0x27/0x27 [ 43.058026] EIP: 0xb7a95082 [ 43.058026] EFLAGS: 00000246 CPU: 0 [ 43.058026] EAX: ffffffda EBX: 00000005 ECX: bfe76e40 EDX: 00000048 [ 43.058026] ESI: 00000040 EDI: 00000000 EBP: 00a8a458 ESP: bfe76e0c [ 43.058026] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 43.058026] Code: 89 43 30 89 43 34 c7 43 38 40 8c 07 c1 8d 4b 2c b8 01 00 00 00 e8 7b d4 fa ff 5b 5d c3 55 89 e5 56 53 e8 e4 6d f9 ff 31 db 89 c6 <39> 5e 04 8b 46 38 76 0b 8b 04 98 43 e8 9b ff ff ff eb ed e8 5b [ 43.058026] EIP: free_used_maps+0xe/0x2a SS:ESP: 0068:c0033e48 [ 43.058026] CR2: 0000000000000004 [ 43.070394] ---[ end trace 76c4354246d4bc3b ]--- [ 43.154492] systemd: 35 output lines suppressed due to ratelimiting [ 43.172970] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 [ 43.172970] [ 43.174034] Kernel Offset: disabled [ 43.174034] Rebooting in 45 seconds..