From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932392AbdJXPKr (ORCPT ); Tue, 24 Oct 2017 11:10:47 -0400 Received: from mail-io0-f171.google.com ([209.85.223.171]:43767 "EHLO mail-io0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932331AbdJXPK2 (ORCPT ); Tue, 24 Oct 2017 11:10:28 -0400 X-Google-Smtp-Source: ABhQp+Qk1837RPOUAjUbO3xjpY8Vu1ruznFl8rQqMt/nLWe4Ghhf0uDXqbp5a6VsHTov4ofMNVBR7dqhpxPOweclfJA= MIME-Version: 1.0 In-Reply-To: <001a114a958ce46160055c4c4f66@google.com> References: <001a114a958ce46160055c4c4f66@google.com> From: Dmitry Vyukov Date: Tue, 24 Oct 2017 17:10:06 +0200 Message-ID: Subject: Re: kernel BUG at net/key/af_key.c:LINE! To: syzbot Cc: David Miller , Herbert Xu , LKML , netdev , Steffen Klassert , syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 24, 2017 at 5:08 PM, syzbot wrote: > Hello, > > syzkaller hit the following crash on > 02a2b05395dde2f49e7777b67b51a5fbc6606943 > git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/master > compiler: gcc (GCC) 7.1.1 20170620 > .config is attached > Raw console output is attached. > C reproducer is attached > syzkaller reproducer is attached. See https://goo.gl/kgGztJ > for information about syzkaller reproducers This also happened on more recent commits, including net-next 833e0e2f24fd0525090878f71e129a8a4cb8bf78 (Oct 10) with similar signature: ------------[ cut here ]------------ kernel BUG at net/key/af_key.c:2068! invalid opcode: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 11011 Comm: syz-executor1 Not tainted 4.14.0-rc4+ #80 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d4ecc1c0 task.stack: ffff8801c13f8000 RIP: 0010:pfkey_xfrm_policy2msg+0x209c/0x22b0 net/key/af_key.c:2068 RSP: 0018:ffff8801c13ff4b0 EFLAGS: 00010212 RAX: 0000000000010000 RBX: ffff8801ceaa828c RCX: ffffc90001f3c000 RDX: 0000000000000599 RSI: ffffffff8444c4fc RDI: ffff8801ceaa812c RBP: ffff8801c13ff588 R08: 0000000000000001 R09: ffff8801d55dbb40 R10: 000000000000001b R11: ffffed003aabb782 R12: ffff8801ceaa8148 R13: ffff8801ceaa8040 R14: 0000000000000008 R15: 0000000000000001 FS: 00007fc611208700(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000ff0 CR3: 00000001a13b6000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dump_sp+0x14f/0x510 net/key/af_key.c:2669 xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1015 pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2692 pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299 pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2719 pfkey_process+0x60b/0x720 net/key/af_key.c:2809 pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3648 sock_sendmsg_nosec net/socket.c:633 [inline] sock_sendmsg+0xca/0x110 net/socket.c:643 sock_write_iter+0x320/0x5e0 net/socket.c:912 call_write_iter include/linux/fs.h:1770 [inline] new_sync_write fs/read_write.c:468 [inline] __vfs_write+0x68a/0x970 fs/read_write.c:481 vfs_write+0x18f/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x4520a9 RSP: 002b:00007fc611207c08 EFLAGS: 00000216 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000718000 RCX: 00000000004520a9 RDX: 0000000000000010 RSI: 0000000020000ff0 RDI: 0000000000000019 RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000216 R12: 00000000004bf3b0 R13: 00000000ffffffff R14: 0000000000000005 R15: 0000000000000029 Code: ff ff 48 89 95 58 ff ff ff 89 8d 70 ff ff ff e8 fb 70 5e fd 48 8b 95 58 ff ff ff 8b 8d 70 ff ff ff e9 04 e3 ff ff e8 74 4c 29 fd <0f> 0b be 02 00 00 00 4c 89 f7 e8 15 72 5e fd e9 6f e3 ff ff 48 RIP: pfkey_xfrm_policy2msg+0x209c/0x22b0 net/key/af_key.c:2068 RSP: ffff8801c13ff4b0 ---[ end trace 3103e09d7f60a307 ]--- > ------------[ cut here ]------------ > kernel BUG at net/key/af_key.c:2068! > invalid opcode: 0000 [#1] SMP KASAN > Dumping ftrace buffer: > (ftrace buffer empty) > Modules linked in: > CPU: 0 PID: 3024 Comm: syzkaller790413 Not tainted 4.14.0-rc2+ #16 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > task: ffff8801cddc8100 task.stack: ffff8801c0a88000 > RIP: 0010:pfkey_xfrm_policy2msg+0x209c/0x22b0 net/key/af_key.c:2068 > RSP: 0018:ffff8801c0a8f318 EFLAGS: 00010297 > RAX: ffff8801cddc8100 RBX: ffff8801cea778cc RCX: 0000000000000000 > RDX: 0000000000000000 RSI: 000000000000204e RDI: ffff8801cea7776c > RBP: ffff8801c0a8f3f0 R08: 0000000000000001 R09: ffff8801d0b66dc0 > R10: 000000000000001b R11: ffffed003a16cdd2 R12: ffff8801cea77788 > R13: ffff8801cea77680 R14: 0000000000000008 R15: 0000000000000001 > FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000ecf1fb40 > CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 > CR2: 0000000020002ff0 CR3: 00000001d4b3c000 CR4: 00000000001406f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > dump_sp+0x14f/0x510 net/key/af_key.c:2669 > xfrm_policy_walk+0x2f1/0xa30 net/xfrm/xfrm_policy.c:1015 > pfkey_dump_sp+0x42/0x50 net/key/af_key.c:2692 > pfkey_do_dump+0xaa/0x3f0 net/key/af_key.c:299 > pfkey_spddump+0x1a0/0x210 net/key/af_key.c:2719 > pfkey_process+0x60b/0x720 net/key/af_key.c:2809 > pfkey_sendmsg+0x4d6/0x9f0 net/key/af_key.c:3648 > sock_sendmsg_nosec net/socket.c:633 [inline] > sock_sendmsg+0xca/0x110 net/socket.c:643 > sock_write_iter+0x320/0x5e0 net/socket.c:912 > call_write_iter include/linux/fs.h:1770 [inline] > new_sync_write fs/read_write.c:468 [inline] > __vfs_write+0x68a/0x970 fs/read_write.c:481 > vfs_write+0x18f/0x510 fs/read_write.c:543 > SYSC_write fs/read_write.c:588 [inline] > SyS_write+0xef/0x220 fs/read_write.c:580 > do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline] > do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391 > entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 > RIP: 0023:0xf7f39c79 > RSP: 002b:00000000ecf1f1ec EFLAGS: 00000297 ORIG_RAX: 0000000000000004 > RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000020002ff0 > RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > Code: ff ff 48 89 95 58 ff ff ff 89 8d 70 ff ff ff e8 ab 90 5f fd 48 8b 95 > 58 ff ff ff 8b 8d 70 ff ff ff e9 04 e3 ff ff e8 54 d2 2a fd <0f> 0b be 02 00 > 00 00 4c 89 f7 e8 c5 91 5f fd e9 6f e3 ff ff 48 > RIP: pfkey_xfrm_policy2msg+0x209c/0x22b0 net/key/af_key.c:2068 RSP: > ffff8801c0a8f318 > ---[ end trace 5d48d18d4a6d272b ]--- > > > --- > This bug is generated by a dumb bot. It may contain errors. > See https://goo.gl/tpsmEJ for details. > Direct all questions to syzkaller@googlegroups.com. > > syzbot will keep track of this bug report. > Once a fix for this bug is committed, please reply to this email with: > #syz fix: exact-commit-title > To mark this as a duplicate of another syzbot report, please reply with: > #syz dup: exact-subject-of-another-report > If it's a one-off invalid bug report, please reply with: > #syz invalid > Note: if the crash happens again, it will cause creation of a new bug > report. > > -- > You received this message because you are subscribed to the Google Groups > "syzkaller-bugs" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to syzkaller-bugs+unsubscribe@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/syzkaller-bugs/001a114a958ce46160055c4c4f66%40google.com. > For more options, visit https://groups.google.com/d/optout.