From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (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 CD5CC33CF for ; Sun, 31 Dec 2023 11:04:26 +0000 (UTC) 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-il1-f198.google.com with SMTP id e9e14a558f8ab-35ffefe1f5cso61976095ab.1 for ; Sun, 31 Dec 2023 03:04:26 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1704020666; x=1704625466; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=kYkYEvGx30RFSFP8frLy+6pEGVc4qdRv1fh1EKzCoMI=; 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syzkaller Message-ID: <0000000000007c85f5060dcc3a28@google.com> Subject: [syzbot] [net?] general protection fault in qdisc_create From: syzbot To: davem@davemloft.net, edumazet@google.com, jhs@mojatatu.com, jiri@resnulli.us, kuba@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, pctammela@mojatatu.com, syzkaller-bugs@googlegroups.com, victor@mojatatu.com, xiyou.wangcong@gmail.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c2b2ee36250d bridge: cfm: fix enum typo in br_cc_ccm_tx_pa.. git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=15812036e80000 kernel config: https://syzkaller.appspot.com/x/.config?x=a4e9ca8e3c104d2a dashboard link: https://syzkaller.appspot.com/bug?extid=84339b9e7330daae4d66 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13535445e80000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15fed8f6e80000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/7344dc892eab/disk-c2b2ee36.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b5d04995c162/vmlinux-c2b2ee36.xz kernel image: https://storage.googleapis.com/syzbot-assets/9558856ab7f4/bzImage-c2b2ee36.xz The issue was bisected to: commit 913b47d3424e7d99eaf34b798c47dfa840c64a08 Author: Victor Nogueira Date: Tue Dec 19 18:16:19 2023 +0000 net/sched: Introduce tc block netdev tracking infra bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11992409e80000 final oops: https://syzkaller.appspot.com/x/report.txt?x=13992409e80000 console output: https://syzkaller.appspot.com/x/log.txt?x=15992409e80000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+84339b9e7330daae4d66@syzkaller.appspotmail.com Fixes: 913b47d3424e ("net/sched: Introduce tc block netdev tracking infra") general protection fault, probably for non-canonical address 0xdffffc0000000009: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000048-0x000000000000004f] CPU: 1 PID: 5061 Comm: syz-executor323 Not tainted 6.7.0-rc6-syzkaller-01658-gc2b2ee36250d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:qdisc_block_add_dev net/sched/sch_api.c:1190 [inline] RIP: 0010:qdisc_create+0x69e/0x1430 net/sched/sch_api.c:1390 Code: ea 03 80 3c 02 00 0f 85 50 0c 00 00 4c 8b 6d 08 49 8d 45 48 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0f 0c 00 00 31 d2 be f2 ff 00 00 48 89 df 41 ff RSP: 0018:ffffc9000398f420 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88802688c800 RCX: ffffffff888dbd56 RDX: 0000000000000009 RSI: ffffffff888db6fe RDI: ffffffff8f19bde8 RBP: ffffffff8f19bde0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804fd64000 R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8f19bde0 FS: 0000555556ef3380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001248 CR3: 0000000027f71000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tc_modify_qdisc+0x4d5/0x1c30 net/sched/sch_api.c:1788 rtnetlink_rcv_msg+0x3c7/0xe00 net/core/rtnetlink.c:6615 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2543 netlink_unicast_kernel net/netlink/af_netlink.c:1341 [inline] netlink_unicast+0x53b/0x810 net/netlink/af_netlink.c:1367 netlink_sendmsg+0x8b7/0xd70 net/netlink/af_netlink.c:1908 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0xd5/0x180 net/socket.c:745 ____sys_sendmsg+0x6ac/0x940 net/socket.c:2584 ___sys_sendmsg+0x135/0x1d0 net/socket.c:2638 __sys_sendmsg+0x117/0x1e0 net/socket.c:2667 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f9733a8a8b9 Code: 48 83 c4 28 c3 e8 27 18 00 00 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd50d7c048 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f9733a8a8b9 RDX: 0000000000000000 RSI: 0000000020005840 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffd50d7c0c0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd50d7c248 R14: 0000000000000001 R15: 0000000000000001 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:qdisc_block_add_dev net/sched/sch_api.c:1190 [inline] RIP: 0010:qdisc_create+0x69e/0x1430 net/sched/sch_api.c:1390 Code: ea 03 80 3c 02 00 0f 85 50 0c 00 00 4c 8b 6d 08 49 8d 45 48 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 0f 0c 00 00 31 d2 be f2 ff 00 00 48 89 df 41 ff RSP: 0018:ffffc9000398f420 EFLAGS: 00010206 RAX: dffffc0000000000 RBX: ffff88802688c800 RCX: ffffffff888dbd56 RDX: 0000000000000009 RSI: ffffffff888db6fe RDI: ffffffff8f19bde8 RBP: ffffffff8f19bde0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff88804fd64000 R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8f19bde0 FS: 0000555556ef3380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020001248 CR3: 0000000027f71000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 03 80 3c 02 00 0f add 0xf00023c(%rax),%eax 6: 85 50 0c test %edx,0xc(%rax) 9: 00 00 add %al,(%rax) b: 4c 8b 6d 08 mov 0x8(%rbp),%r13 f: 49 8d 45 48 lea 0x48(%r13),%rax 13: 48 89 c2 mov %rax,%rdx 16: 48 89 44 24 18 mov %rax,0x18(%rsp) 1b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 22: fc ff df 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 0f 85 0f 0c 00 00 jne 0xc42 33: 31 d2 xor %edx,%edx 35: be f2 ff 00 00 mov $0xfff2,%esi 3a: 48 89 df mov %rbx,%rdi 3d: 41 rex.B 3e: ff .byte 0xff --- 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. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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