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=-5.7 required=3.0 tests=FROM_LOCAL_HEX, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,URIBL_BLOCKED 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 ADB9BC43387 for ; Wed, 2 Jan 2019 13:02:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 71B082075B for ; Wed, 2 Jan 2019 13:02:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729891AbfABNBG (ORCPT ); Wed, 2 Jan 2019 08:01:06 -0500 Received: from mail-it1-f199.google.com ([209.85.166.199]:56639 "EHLO mail-it1-f199.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728419AbfABNBF (ORCPT ); Wed, 2 Jan 2019 08:01:05 -0500 Received: by mail-it1-f199.google.com with SMTP id x3so33029977itb.6 for ; Wed, 02 Jan 2019 05:01:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=hK9B/5cBZKe4Rlvrcua+tl4s4BF94cvUHGg3kc0hZlU=; b=f22NEaiJvqzSOOlg33azbEPwwJOzp6kP96YW9I5wtyzLr3YRCPbsk+P0fjtHM9Fuh3 6SvR9vgN3IG0w1F+p7uggSlqFu4DVkGViZeAHHVDe/0qo9ZDP30vytD3vDJ9TXzvAfE+ N85nedjhDBeoJjz/RmyB6emKMmbohOzmBOnjCpRVB545xL1Ep1AidZAay8cg7mJeGYNx Anu3utVhwIKTL1LS60HExADrjG66O8IQLW2J3LYE0XAEw906kjw1GbZBPmOFwF8faUv2 8OUCyeFUsXWDPaO9gTJY9USEi02a2vC+1bKczAecTvJdu+RcLnvr0b1BOMmDwLElhCzo gyEw== X-Gm-Message-State: AJcUukefpVB1GXht9ALpK2ugPlzs8CSL1a6xX8onFJ80UcQdLB6wPnO+ QD8U/WBpwsO+SscYdWF93S86Oli1VW9wJlmYR+XBx2axguZJ X-Google-Smtp-Source: ALg8bN5Ra43dQjcXwpW17wMW66ko0Dbj5IGXU92XiFif8/2KgIfLGB3kT9V6LobVjujtcagXPbxzWW1xFmCpZZQdLHsQvjP7MrRD MIME-Version: 1.0 X-Received: by 2002:a24:ed8c:: with SMTP id r134mr32293833ith.30.1546434064362; Wed, 02 Jan 2019 05:01:04 -0800 (PST) Date: Wed, 02 Jan 2019 05:01:04 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000133d0a057e793df4@google.com> Subject: KASAN: stack-out-of-bounds Read in corrupted (3) From: syzbot To: crecklin@redhat.com, keescook@chromium.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: 28e8c4bc8eb4 Merge tag 'rtc-4.21' of git://git.kernel.org/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=122355bf400000 kernel config: https://syzkaller.appspot.com/x/.config?x=c2ab9708c613a224 dashboard link: https://syzkaller.appspot.com/bug?extid=2ab493acb9d8329345a3 compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=106e29e7400000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2ab493acb9d8329345a3@syzkaller.appspotmail.com ------------[ cut here ]------------ ================================================================== DEBUG_LOCKS_WARN_ON(current->hardirq_context) ------------[ cut here ]------------ BUG: KASAN: stack-out-of-bounds in debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] BUG: KASAN: stack-out-of-bounds in do_raw_spin_lock+0x303/0x360 kernel/locking/spinlock_debug.c:112 Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'task_struct' (offset 912, size 2)! Read of size 4 at addr ffff8880a9466a44 by task kworker/1:0/7562 WARNING: CPU: 0 PID: -1455013312 at mm/usercopy.c:78 usercopy_warn+0xeb/0x110 mm/usercopy.c:78 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7562 Comm: kworker/1:0 Not tainted 4.20.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp process_srcu Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1db/0x2d0 lib/dump_stack.c:113 print_address_description.cold+0x7c/0x20d mm/kasan/report.c:187 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] do_raw_spin_lock+0x303/0x360 kernel/locking/spinlock_debug.c:112 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0x9d/0xcd kernel/locking/spinlock.c:152 try_to_wake_up+0xb9/0x1480 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 process_timeout+0x31/0x40 kernel/time/timer.c:1732 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:rdtsc arch/x86/include/asm/msr.h:207 [inline] RIP: 0010:rdtsc_ordered arch/x86/include/asm/msr.h:232 [inline] RIP: 0010:delay_tsc+0x4c/0xc0 arch/x86/lib/delay.c:61 Code: e8 0f 31 48 c1 e2 20 48 09 c2 49 89 d4 eb 16 f3 90 bf 01 00 00 00 e8 33 70 68 f9 e8 de 5c a0 fb 44 39 e8 75 36 0f ae e8 0f 31 <48> c1 e2 20 48 89 d3 48 09 c3 48 89 d8 4c 29 e0 4c 39 f0 73 24 bf RSP: 0018:ffff8880891af5a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 00000000f513364d RBX: 00000201f5133563 RCX: ffffffff838fb3ca RDX: 0000000000000201 RSI: ffffffff838fb3d8 RDI: 0000000000000005 RBP: ffff8880891af5c0 R08: ffff88808f0ec240 R09: fffffbfff16af64d R10: ffff8880891af710 R11: ffffffff8b57b267 R12: 00000201f51326c9 R13: 0000000000000001 R14: 0000000000002ced R15: ffffffff8b57aec0 __delay arch/x86/lib/delay.c:161 [inline] __const_udelay+0x5f/0x80 arch/x86/lib/delay.c:175 try_check_zero+0x352/0x5c0 kernel/rcu/srcutree.c:730 srcu_advance_state kernel/rcu/srcutree.c:1167 [inline] process_srcu+0x642/0x1400 kernel/rcu/srcutree.c:1261 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 CPU: 0 PID: -1455013312 Comm: Not tainted 4.20.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Allocated by task 2839968544: Call Trace: BUG: unable to handle kernel paging request at ffffffff8cf07580 #PF error: [normal kernel read fault] PGD 9871067 P4D 9871067 PUD 9872063 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 7562 Comm: kworker/1:0 Not tainted 4.20.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: rcu_gp process_srcu RIP: 0010:depot_fetch_stack+0x10/0x30 lib/stackdepot.c:202 Code: 36 0f 23 fe e9 20 fe ff ff 48 89 df e8 29 0f 23 fe e9 f1 fd ff ff 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 80 31 f4 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 RSP: 0018:ffff8880ae707640 EFLAGS: 00010006 RAX: 00000000001f8880 RBX: ffff8880a9467a44 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880ae707648 RDI: 0000000000003ff0 RBP: ffff8880ae707670 R08: 000000000000001d R09: ffffed1015ce3ef9 R10: ffffed1015ce3ef8 R11: ffff8880ae71f7c7 R12: ffffea0002a51980 R13: ffff8880a9466a44 R14: ffff8880aa13d900 R15: ffff8880a9467a40 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8cf07580 CR3: 0000000099fe2000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: describe_object mm/kasan/report.c:158 [inline] print_address_description.cold+0x16a/0x20d mm/kasan/report.c:194 kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317 __asan_report_load4_noabort+0x14/0x20 mm/kasan/generic_report.c:134 debug_spin_lock_before kernel/locking/spinlock_debug.c:83 [inline] do_raw_spin_lock+0x303/0x360 kernel/locking/spinlock_debug.c:112 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:117 [inline] _raw_spin_lock_irqsave+0x9d/0xcd kernel/locking/spinlock.c:152 try_to_wake_up+0xb9/0x1480 kernel/sched/core.c:1965 wake_up_process+0x10/0x20 kernel/sched/core.c:2129 process_timeout+0x31/0x40 kernel/time/timer.c:1732 call_timer_fn+0x254/0x900 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1362 [inline] __run_timers+0x6fc/0xd50 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30b/0xb11 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1b7/0x760 arch/x86/kernel/apic/apic.c:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:rdtsc arch/x86/include/asm/msr.h:207 [inline] RIP: 0010:rdtsc_ordered arch/x86/include/asm/msr.h:232 [inline] RIP: 0010:delay_tsc+0x4c/0xc0 arch/x86/lib/delay.c:61 Code: e8 0f 31 48 c1 e2 20 48 09 c2 49 89 d4 eb 16 f3 90 bf 01 00 00 00 e8 33 70 68 f9 e8 de 5c a0 fb 44 39 e8 75 36 0f ae e8 0f 31 <48> c1 e2 20 48 89 d3 48 09 c3 48 89 d8 4c 29 e0 4c 39 f0 73 24 bf RSP: 0018:ffff8880891af5a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 00000000f513364d RBX: 00000201f5133563 RCX: ffffffff838fb3ca RDX: 0000000000000201 RSI: ffffffff838fb3d8 RDI: 0000000000000005 RBP: ffff8880891af5c0 R08: ffff88808f0ec240 R09: fffffbfff16af64d R10: ffff8880891af710 R11: ffffffff8b57b267 R12: 00000201f51326c9 R13: 0000000000000001 R14: 0000000000002ced R15: ffffffff8b57aec0 __delay arch/x86/lib/delay.c:161 [inline] __const_udelay+0x5f/0x80 arch/x86/lib/delay.c:175 try_check_zero+0x352/0x5c0 kernel/rcu/srcutree.c:730 srcu_advance_state kernel/rcu/srcutree.c:1167 [inline] process_srcu+0x642/0x1400 kernel/rcu/srcutree.c:1261 process_one_work+0xd0c/0x1ce0 kernel/workqueue.c:2153 worker_thread+0x143/0x14a0 kernel/workqueue.c:2296 kthread+0x357/0x430 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Modules linked in: CR2: ffffffff8cf07580 ---[ end trace 7f399f30ebf94723 ]--- RIP: 0010:depot_fetch_stack+0x10/0x30 lib/stackdepot.c:202 Code: 36 0f 23 fe e9 20 fe ff ff 48 89 df e8 29 0f 23 fe e9 f1 fd ff ff 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 80 31 f4 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 RSP: 0018:ffff8880ae707640 EFLAGS: 00010006 RAX: 00000000001f8880 RBX: ffff8880a9467a44 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880ae707648 RDI: 0000000000003ff0 RBP: ffff8880ae707670 R08: 000000000000001d R09: ffffed1015ce3ef9 R10: ffffed1015ce3ef8 R11: ffff8880ae71f7c7 R12: ffffea0002a51980 R13: ffff8880a9466a44 R14: ffff8880aa13d900 R15: ffff8880a9467a40 FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff8cf07580 CR3: 0000000099fe2000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Shutting down cpus with NMI usercopy: Kernel memory overwrite attempt detected to SLAB object 'sighand_cache' (offset 2320, size 2)! ------------[ cut here ]------------ kernel BUG at mm/usercopy.c:102! WARNING: CPU: 0 PID: -1455013312 at kernel/rcu/tree_plugin.h:414 __rcu_read_lock+0x75/0x90 kernel/rcu/tree_plugin.h:416 Modules linked in: CPU: 0 PID: -1455013312 Comm: Tainted: G D 4.20.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__rcu_read_lock+0x75/0x90 kernel/rcu/tree_plugin.h:414 Code: 00 48 8d bb 70 03 00 00 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 14 81 bb 70 03 00 00 ff ff ff 3f 7f 03 5b 5d c3 <0f> 0b 5b 5d c3 e8 61 db 59 00 eb e5 e8 5a db 59 00 eb aa 0f 1f 84 RSP: 0018:ffff8880a9463850 EFLAGS: 00010012 RAX: 0000000000000000 RBX: ffff8880a9464240 RCX: ffffffff816b545f RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880a94645b0 RBP: ffff8880a9463858 R08: ffff8880a9464240 R09: 0000000000000004 R10: ffffed1015cc3ef8 R11: ffff8880ae61f7c7 R12: 0000000000000000 R13: 0000000000000008 R14: ffff8880a94638d0 R15: ffff8880a94639d8 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1524df3169 CR3: 000000008509b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: irq event stamp: 2321324489 hardirqs last enabled at (2170814927): [] 0xffffed101528c974 hardirqs last disabled at (2321324489): [] vprintk_emit+0x169/0x960 kernel/printk/printk.c:1911 softirqs last enabled at (0): [] gue6_err+0x0/0x6b0 net/ipv6/fou6.c:86 softirqs last disabled at (1): [<0000000000000001>] 0x1 ---[ end trace 7f399f30ebf94724 ]--- invalid opcode: 0000 [#2] PREEMPT SMP KASAN CPU: 0 PID: -1455013312 Comm: Tainted: G D W 4.20.0+ #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:usercopy_abort+0xbd/0xbf mm/usercopy.c:102 Code: c0 e8 0d 0b b2 ff 48 8b 55 c0 49 89 d9 4d 89 f0 ff 75 c8 4c 89 e1 4c 89 ee 48 c7 c7 00 27 55 88 ff 75 d0 41 57 e8 5d 4b 98 ff <0f> 0b e8 e2 0a b2 ff e8 dd af f5 ff 8b 95 20 ff ff ff 4c 89 e1 31 RSP: 0018:ffff8880a9463a80 EFLAGS: 00010086 RAX: 0000000000000068 RBX: ffffffff88494720 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8167d666 RDI: ffffed101528c742 RBP: ffff8880a9463ad8 R08: 0000000000000068 R09: ffffed1015cc3ef9 R10: ffffed1015cc3ef8 R11: ffff8880ae61f7c7 R12: ffffffff893bcfb5 R13: ffffffff88552560 R14: ffffffff885524a0 R15: ffffffff88552460 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1524df3169 CR3: 000000008509b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: ---[ end trace 7f399f30ebf94725 ]--- RIP: 0010:depot_fetch_stack+0x10/0x30 lib/stackdepot.c:202 Code: 36 0f 23 fe e9 20 fe ff ff 48 89 df e8 29 0f 23 fe e9 f1 fd ff ff 90 90 90 90 89 f8 c1 ef 11 25 ff ff 1f 00 81 e7 f0 3f 00 00 <48> 03 3c c5 80 31 f4 8b 8b 47 0c 48 83 c7 18 c7 46 10 00 00 00 00 RSP: 0018:ffff8880ae707640 EFLAGS: 00010006 RAX: 00000000001f8880 RBX: ffff8880a9467a44 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff8880ae707648 RDI: 0000000000003ff0 RBP: ffff8880ae707670 R08: 000000000000001d R09: ffffed1015ce3ef9 R10: ffffed1015ce3ef8 R11: ffff8880ae71f7c7 R12: ffffea0002a51980 R13: ffff8880a9466a44 R14: ffff8880aa13d900 R15: ffff8880a9467a40 FS: 0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1524df3169 CR3: 000000008509b000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This bug is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches