From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f80.google.com (mail-io1-f80.google.com [209.85.166.80]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CAD8B78F2F for ; Mon, 19 May 2025 10:23:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.80 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747650215; cv=none; b=FrE/Ug4AlWvwFvsvxpSpCmcZN/CuQmGdrj4RPDaYLEG/6KzfX+iBfCI055TlgTxpplDCSO2UwuispA9RgIkhuMmZhObQK5r4AsE7cjvdlYYBXs6mVyGA1k9aOlpb5oJcQ0eTnvrGZF3iwSoWJxntV4jczY2wVJaU8Hl1Mqt/P7o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747650215; c=relaxed/simple; bh=TNWOOmFdKh5Te0IVVwVug5wyjYdt6ZQ3zVv0lDeecH4=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=PgEFW7MFX3ukaNUm+pRNZ7WF53b0RM29nwF01KpjM3vHsRmRw3APt8g46PEkn2OPrBo5OMYyKU/H4koAeAoGXQswWIKAVip7TzRtXSCnEpQ79fEsIIh/PshvAytB/UHfQixFRMpVO65ao83FjPec5XbzQIwgh1D35RxesHN7mQY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.80 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-io1-f80.google.com with SMTP id ca18e2360f4ac-85b3a6c37e2so425844139f.0 for ; Mon, 19 May 2025 03:23:33 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747650213; x=1748255013; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=UxjA/skpsZ6ve4Eq9tzitS6uxtwllVmaQFjM+/pknUU=; b=lyUYY2C+9cxlyPn6QZM7xE32fAXztahn4m/Uv+TN7gk5alRsHKMQam5orfxddv4tsS OePDE2kkPrpuF3ldO1GzJNPaHn5LyA0GFRdUHf6iWBxurVsgsrXVSMBnXbWAS5thqxdL 7QzB0OQ8MACp81Af36jodaIRVOaa4zoW7Kou5IYzV6RcAh52YrqGk54DS6EziAQNRbTC MffHcHGpxRy8a2cc5utwG+DcCdOhVRUqhW7ajnKTuwPsA4Sbt/1muHawhR9DiSMZEHse /hte+vDej+traU/j0QYuT13SBldOWEOWJbHO+rlALlzsnxwsN7plG09k1W24OtLRMT9p 5RDA== X-Forwarded-Encrypted: i=1; AJvYcCVygGwxTOn1EQQJl+xDRC4W8AtyHvzqIcaEIOCwVVPGlbeMvoNQvmqy+8m0B7aaOJ4/71HIGF/5N/laphI=@vger.kernel.org X-Gm-Message-State: AOJu0YwWJ4J70ceO8rCe/JI6x+DalA1za6I4QPY8Q6G5eo/P6fnC/Ju4 mZkvGEg6kxqZBRsAy/ljbU+a0u8hYvxRwR9UP65Eh5MnEGhdXOgtdkUmFAoCo7uWlfWap+Ec9od 0BFmEa05l0I8b8xcz8YcXv8rZX3iwBjlXMNU8jiLFKZ0ffrCyC1vCcrt8ufU= X-Google-Smtp-Source: AGHT+IGz54PQorwCHO4ZTXZfYi3B6zUxW5Jlae9hRcYrqwnUlQVxe05FQm557HufLDHLz5GMlvCQpgViKJwt6uqb0GqnNmJHCSDT Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6602:3a0a:b0:86a:93c:5571 with SMTP id ca18e2360f4ac-86a2317c56cmr1550801339f.1.1747650212909; Mon, 19 May 2025 03:23:32 -0700 (PDT) Date: Mon, 19 May 2025 03:23:32 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <682b06a4.a70a0220.3849cf.00b2.GAE@google.com> Subject: [syzbot] [net?] general protection fault in ip6_ins_rt From: syzbot To: davem@davemloft.net, dsahern@kernel.org, edumazet@google.com, horms@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c94d59a126cb Merge tag 'trace-v6.15-rc6' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=100ddcd4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=7819b10245b63b3d dashboard link: https://syzkaller.appspot.com/bug?extid=ce95bbc882771b5d81f7 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: i386 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c94d59a1.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c62247a68f8a/vmlinux-c94d59a1.xz kernel image: https://storage.googleapis.com/syzbot-assets/4e1db4893db7/bzImage-c94d59a1.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ce95bbc882771b5d81f7@syzkaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 0 UID: 0 PID: 1136 Comm: kworker/u32:5 Not tainted 6.15.0-rc6-syzkaller-00085-gc94d59a126cb #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:199 Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 0e 29 4d 09 66 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc90006d8f818 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000030 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b6c0863 RDI: dffffc0000000006 RBP: 0000000000000030 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8b6c0863 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880977ea000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbf9f52c6b0 CR3: 0000000065999000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __kasan_check_byte+0x13/0x50 mm/kasan/common.c:556 kasan_check_byte include/linux/kasan.h:399 [inline] lock_acquire kernel/locking/lockdep.c:5840 [inline] lock_acquire+0xfc/0x350 kernel/locking/lockdep.c:5823 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:126 [inline] _raw_spin_lock_bh+0x33/0x40 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:356 [inline] __ip6_ins_rt net/ipv6/route.c:1350 [inline] ip6_ins_rt+0xa1/0x110 net/ipv6/route.c:1361 __ipv6_ifa_notify+0xa6b/0xd60 net/ipv6/addrconf.c:6286 ipv6_ifa_notify net/ipv6/addrconf.c:6325 [inline] addrconf_dad_completed+0x19a/0x10d0 net/ipv6/addrconf.c:4324 addrconf_dad_work+0x84d/0x14e0 net/ipv6/addrconf.c:4272 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 kthread+0x3c5/0x780 kernel/kthread.c:464 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x15/0x30 mm/kasan/generic.c:199 Code: 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ef 03 48 01 c7 <0f> b6 07 3c 07 0f 96 c0 e9 0e 29 4d 09 66 66 2e 0f 1f 84 00 00 00 RSP: 0018:ffffc90006d8f818 EFLAGS: 00010286 RAX: dffffc0000000000 RBX: 0000000000000030 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8b6c0863 RDI: dffffc0000000006 RBP: 0000000000000030 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8b6c0863 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880977ea000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fbf9f52c6b0 CR3: 0000000065999000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 0f 1f 00 nopl (%rax) 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 66 0f 1f 00 nopw (%rax) 19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 20: fc ff df 23: 48 c1 ef 03 shr $0x3,%rdi 27: 48 01 c7 add %rax,%rdi * 2a: 0f b6 07 movzbl (%rdi),%eax <-- trapping instruction 2d: 3c 07 cmp $0x7,%al 2f: 0f 96 c0 setbe %al 32: e9 0e 29 4d 09 jmp 0x94d2945 37: 66 data16 38: 66 data16 39: 2e cs 3a: 0f .byte 0xf 3b: 1f (bad) 3c: 84 00 test %al,(%rax) --- This report 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 issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup