From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-186.mta0.migadu.com (out-186.mta0.migadu.com [91.218.175.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 58980262D14 for ; Fri, 27 Jun 2025 23:10:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.218.175.186 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751065855; cv=none; b=ppHdrJRsmqVP0CPyHzzjOhEbO8FUCg/p8/ZqOTMQGD4NqvDUsn5WFauBU/ICN2p2FZ/bfwXJf3b8g4fs8gT4reN7onKty/A/ZtLycos0nB+mtN+t+4f9KkqtS3/MNCjxtfTewvdslL8XJfDTTJI6+dNRxbcJHm6Tb4Ti1BstR4g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751065855; c=relaxed/simple; bh=LpFM7L8AHpBWBjCFaSLD4sn+R7RxcGe4IQ2vW+3wuN4=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=m8p678yUTOMMNoSjNOjPFat2pyLcSAS5ln9/rmidwagq4iIpT829P/+YPpzXmCOIutzJ9Fu6wmCRQuiBzoVHadhVlZUCf06sKynBkUYKcX3neSw47B7uTOK8qM+BZB1us/K41nT4Unwno2d6r4iqVJ+7Z9GnoefB07PnlFO/h58= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=KzNpiuSk; arc=none smtp.client-ip=91.218.175.186 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="KzNpiuSk" Message-ID: <1109aeb9-1e64-4052-b733-dd4af62019b7@linux.dev> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1751065849; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=CPCe6Tcr4w/qutC4mIds2r6y/+g1SeYgO+CKCZrb6HI=; b=KzNpiuSkfJh9cXqTtNOrAOURSzChir6c4+hxtQ97bnMQ2NTE8GIh8Bnp+eO+Bkg/4WD/u4 REZ1O8HQajiCJFp6N9t82et7zg1aYCA35h/SSy/A2E3xK1oMeKuIKWre0rtUNF//15UUHS xio1pyFelznABzT7yurv3hSyxf4SbG8= Date: Fri, 27 Jun 2025 16:10:45 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Subject: Re: [syzbot] [rdma?] WARNING in rxe_skb_tx_dtor To: syzbot , linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com References: <685f030b.a00a0220.3efde.0002.GAE@google.com> Content-Language: en-US X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. From: "Yanjun.Zhu" In-Reply-To: <685f030b.a00a0220.3efde.0002.GAE@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Migadu-Flow: FLOW_OUT #syz test: https://github.com/zhuyj/linux.git v6.16_fix_rxe_skb_tx_dtor On 6/27/25 1:46 PM, syzbot wrote: > Hello, > > syzbot has tested the proposed patch but the reproducer is still triggering an issue: > general protection fault in rxe_skb_tx_dtor > > Oops: general protection fault, probably for non-canonical address 0xe000bc000000006c: 0000 [#1] SMP KASAN NOPTI > KASAN: maybe wild-memory-access in range [0x0006000000000360-0x0006000000000367] > CPU: 0 UID: 0 PID: 1039 Comm: kworker/u4:7 Not tainted 6.16.0-rc3-syzkaller-gc0e71fcff378 #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: rxe_wq do_work > RIP: 0010:rxe_skb_tx_dtor+0x78/0x240 drivers/infiniband/sw/rxe/rxe_net.c:364 > Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 72 65 81 f9 4d 8b 36 4d 85 f6 0f 84 c3 00 00 00 4d 8d be 60 03 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 77 01 00 00 41 8b 2f 31 ff 89 ee e8 bf > RSP: 0018:ffffc900000079e8 EFLAGS: 00010206 > RAX: 0000c0000000006c RBX: ffff8880122848c0 RCX: ffff8880330a8000 > RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8880122848c0 > RBP: 0000000000000000 R08: ffffffff8fa10ef7 R09: 1ffffffff1f421de > R10: dffffc0000000000 R11: ffffffff88a26c60 R12: dffffc0000000000 > R13: dffffc0000000000 R14: 0006000000000000 R15: 0006000000000360 > FS: 0000000000000000(0000) GS:ffff88808d250000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fb0aec28fc8 CR3: 000000004f814000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > > skb_release_head_state+0x101/0x250 net/core/skbuff.c:1139 > napi_consume_skb+0xd2/0x1e0 net/core/skbuff.c:-1 > e1000_unmap_and_free_tx_resource drivers/net/ethernet/intel/e1000/e1000_main.c:1972 [inline] > e1000_clean_tx_irq drivers/net/ethernet/intel/e1000/e1000_main.c:3864 [inline] > e1000_clean+0x49d/0x2b00 drivers/net/ethernet/intel/e1000/e1000_main.c:3805 > __napi_poll+0xc7/0x480 net/core/dev.c:7414 > napi_poll net/core/dev.c:7478 [inline] > net_rx_action+0x707/0xe30 net/core/dev.c:7605 > handle_softirqs+0x286/0x870 kernel/softirq.c:579 > do_softirq+0xec/0x180 kernel/softirq.c:480 > > > __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407 > local_bh_enable include/linux/bottom_half.h:33 [inline] > __neigh_event_send+0x9b/0x1560 net/core/neighbour.c:1194 > neigh_event_send_probe include/net/neighbour.h:463 [inline] > neigh_event_send include/net/neighbour.h:469 [inline] > neigh_resolve_output+0x198/0x750 net/core/neighbour.c:1496 > neigh_output include/net/neighbour.h:539 [inline] > ip6_finish_output2+0x11fb/0x16a0 net/ipv6/ip6_output.c:141 > __ip6_finish_output net/ipv6/ip6_output.c:-1 [inline] > ip6_finish_output+0x234/0x7d0 net/ipv6/ip6_output.c:226 > rxe_send drivers/infiniband/sw/rxe/rxe_net.c:390 [inline] > rxe_xmit_packet+0x79e/0xa30 drivers/infiniband/sw/rxe/rxe_net.c:449 > rxe_requester+0x1fea/0x3d20 drivers/infiniband/sw/rxe/rxe_req.c:805 > rxe_sender+0x16/0x50 drivers/infiniband/sw/rxe/rxe_req.c:839 > do_task drivers/infiniband/sw/rxe/rxe_task.c:127 [inline] > do_work+0x1b1/0x6c0 drivers/infiniband/sw/rxe/rxe_task.c:187 > process_one_work kernel/workqueue.c:3238 [inline] > process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 > worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 > kthread+0x70e/0x8a0 kernel/kthread.c:464 > ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 > ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 > > Modules linked in: > ---[ end trace 0000000000000000 ]--- > RIP: 0010:rxe_skb_tx_dtor+0x78/0x240 drivers/infiniband/sw/rxe/rxe_net.c:364 > Code: 03 42 80 3c 28 00 74 08 4c 89 f7 e8 72 65 81 f9 4d 8b 36 4d 85 f6 0f 84 c3 00 00 00 4d 8d be 60 03 00 00 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 77 01 00 00 41 8b 2f 31 ff 89 ee e8 bf > RSP: 0018:ffffc900000079e8 EFLAGS: 00010206 > RAX: 0000c0000000006c RBX: ffff8880122848c0 RCX: ffff8880330a8000 > RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8880122848c0 > RBP: 0000000000000000 R08: ffffffff8fa10ef7 R09: 1ffffffff1f421de > R10: dffffc0000000000 R11: ffffffff88a26c60 R12: dffffc0000000000 > R13: dffffc0000000000 R14: 0006000000000000 R15: 0006000000000360 > FS: 0000000000000000(0000) GS:ffff88808d250000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007fb0aec28fc8 CR3: 000000004f814000 CR4: 0000000000352ef0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > ---------------- > Code disassembly (best guess): > 0: 03 42 80 add -0x80(%rdx),%eax > 3: 3c 28 cmp $0x28,%al > 5: 00 74 08 4c add %dh,0x4c(%rax,%rcx,1) > 9: 89 f7 mov %esi,%edi > b: e8 72 65 81 f9 call 0xf9816582 > 10: 4d 8b 36 mov (%r14),%r14 > 13: 4d 85 f6 test %r14,%r14 > 16: 0f 84 c3 00 00 00 je 0xdf > 1c: 4d 8d be 60 03 00 00 lea 0x360(%r14),%r15 > 23: 4c 89 f8 mov %r15,%rax > 26: 48 c1 e8 03 shr $0x3,%rax > * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction > 2f: 84 c0 test %al,%al > 31: 0f 85 77 01 00 00 jne 0x1ae > 37: 41 8b 2f mov (%r15),%ebp > 3a: 31 ff xor %edi,%edi > 3c: 89 ee mov %ebp,%esi > 3e: e8 .byte 0xe8 > 3f: bf .byte 0xbf > > > Tested on: > > commit: c0e71fcf RDNA/rxe: Fix rxe_skb_tx_dtor problem > git tree: https://github.com/zhuyj/linux.git v6.16_fix_rxe_skb_tx_dtor > console output: https://syzkaller.appspot.com/x/log.txt?x=13d9708c580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=79da270cec5ffd65 > dashboard link: https://syzkaller.appspot.com/bug?extid=8425ccfb599521edb153 > compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 > > Note: no patches were applied.