From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f200.google.com (mail-il1-f200.google.com [209.85.166.200]) (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 79E75341646 for ; Thu, 4 Sep 2025 18:08:58 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.200 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757009340; cv=none; b=kcKaDosYu+A1aJ9C/Vv8H8xCEc2UM57gl8elWg5skL9xy28o6dBgCzOucW+GKS4gQ2gC9sfM04TKnvpBy/Drc9gLKYXv23j5AonM56GkNz3phZvmHUJBdXOj73/0zYHLTKtgk2/oAFIZIXQVHzRkp3RZG08Ak9ShfmOMrrlEkjA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757009340; c=relaxed/simple; bh=6Ph8xSjy9WXYTEvvT8h/a37jTJLfY5M6n6ZWTIg9Ksc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To:Cc: Content-Type; b=GjwHKI8zV5gQUrpDRbYNXTIhqpIfL9+/RCHcfX5nGYbSwQo7Yrkdf+JkFZOWqEesewMo8M55NSR0uc0jt6A3WLrsJdFKzTa2lhkmZt5hHgX3xiZQL+vuOHa5SRPPvmmlc1Ex8P4C0f1j/hufPwB4Zrl4a9Qwe+GSvvXg0tYIJxw= 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=209.85.166.200 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-f200.google.com with SMTP id e9e14a558f8ab-3ed0f07fca2so16077375ab.0 for ; Thu, 04 Sep 2025 11:08:58 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1757009337; x=1757614137; h=cc:to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=f0agGiPnZbnYPb8vc4IQFaCcTHMOWq1oT47RqpjAUkw=; b=Z2rQDVHzaCbf/E/dotSKzjakhjqrY4R5qUhexnW4P2IqdOQJBVc/ZAqNEDhk3EWIZI lrhQw1JyuA3pOnfaCZrtVr0P2R317D9Xk/4fr2UpuYRIFjYrv+jKTsyNp8gFJfVSzvtx H1Y8o3E4wLHy7W5HlWLt4s+BKMDLfYu7nxEMi5eI0dciC/6Kd4DdYL6U5R72uyYjWgZc 5f52kdwyoapSYIi4z4Vp0XhcU2mSTPvVe6WFQbkcndvP/ROyd8E8wmmfhrWo82CrFkR7 iYxk4A7a1BSC4Q4aTeP4n8jkZIqWa5vDQSNjWNngO4cOYZO3TVPHxpgrLh5mA4p0lK5O tN/w== X-Forwarded-Encrypted: i=1; AJvYcCVzoK07aq77ZfLmdnmXgV0A/aRMJlpOoJmZCV0IgLziWOo2l94D87UZ4de/95VgzIv79LM=@vger.kernel.org X-Gm-Message-State: AOJu0YxVAL/ojQy9TXfUQkvFUCZ8AmwxrEkDUri4QPZlpF8Wd28ECVZM hG0NIA5me5266HcNL68N6mqG3Qqqk9eRl4qaJj3Pu0sZyUUOuxA9i1wtgSg5cj6N2UKCfVYlSl9 tiPxinnks9HGzTYRO5jLENwZg6QK6DaNM+75LDDF8waGu7OdTJe8SSzpp97A= X-Google-Smtp-Source: AGHT+IH/fK/WZ+kwKGJ90N1g7HISJurlUwX+eTV9eW0mRbR8aCgl20lOU2P1oRc4chrA6VmnOuOZxo8o8/8cGlqN9+3cPnhLo85e Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:b22:b0:3f2:a7ef:bd88 with SMTP id e9e14a558f8ab-3f3ffda32femr290258005ab.5.1757009337703; Thu, 04 Sep 2025 11:08:57 -0700 (PDT) Date: Thu, 04 Sep 2025 11:08:57 -0700 In-Reply-To: X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <68b9d5b9.050a0220.192772.000d.GAE@google.com> Subject: [syzbot ci] Re: bpf: Support non-linear skbs for BPF_PROG_TEST_RUN From: syzbot ci To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, paul.chaignon@gmail.com Cc: syzbot@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot ci has tested the following series [v1] bpf: Support non-linear skbs for BPF_PROG_TEST_RUN https://lore.kernel.org/all/cover.1756983951.git.paul.chaignon@gmail.com * [PATCH bpf-next 1/4] bpf: Refactor cleanup of bpf_prog_test_run_skb * [PATCH bpf-next 2/4] bpf: Craft non-linear skbs in BPF_PROG_TEST_RUN * [PATCH bpf-next 3/4] selftests/bpf: Support non-linear flag in test loader * [PATCH bpf-next 4/4] selftests/bpf: Test direct packet access on non-linear skbs and found the following issue: kernel BUG in bpf_prog_test_run_skb Full report is available here: https://ci.syzbot.org/series/94d30edd-8375-4788-b43c-b4f85290f7e8 *** kernel BUG in bpf_prog_test_run_skb tree: bpf-next URL: https://kernel.googlesource.com/pub/scm/linux/kernel/git/bpf/bpf-next.git base: c9110e6f7237f4a314e2b87b75a8a158b9877a7b arch: amd64 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 config: https://ci.syzbot.org/builds/f23c9149-2bb8-4751-96fa-a1ef3b28cee2/config syz repro: https://ci.syzbot.org/findings/4d88c169-3df8-4aac-b20a-ff80d8b2eff5/syz_repro ------------[ cut here ]------------ kernel BUG at arch/x86/mm/physaddr.c:23! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 1 UID: 0 PID: 6005 Comm: syz.2.19 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 RIP: 0010:__phys_addr+0x17b/0x180 arch/x86/mm/physaddr.c:23 Code: 50 cf fa 8d 48 89 de 4c 89 f2 e8 10 9a 8a 03 e9 4d ff ff ff e8 66 25 4b 00 90 0f 0b e8 5e 25 4b 00 90 0f 0b e8 56 25 4b 00 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc90002c0fba8 EFLAGS: 00010293 RAX: ffffffff817486fa RBX: 000000007ffffff9 RCX: ffff888107c99cc0 RDX: 0000000000000000 RSI: 000000007ffffff9 RDI: 000000001fffffff RBP: 00000000fffffff9 R08: ffffffff8fa38037 R09: 1ffffffff1f47006 R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000 R13: 0000000000000000 R14: 000000007ffffff9 R15: dffffc0000000000 FS: 00007fae773f76c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31a63fff CR3: 000000001f48c000 CR4: 00000000000006f0 Call Trace: virt_to_folio include/linux/mm.h:1180 [inline] kfree+0x77/0x440 mm/slub.c:4871 bpf_prog_test_run_skb+0xceb/0x16e0 net/bpf/test_run.c:1179 bpf_prog_test_run+0x2c7/0x340 kernel/bpf/syscall.c:4590 __sys_bpf+0x581/0x870 kernel/bpf/syscall.c:6047 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fae7658ebe9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fae773f7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fae767c5fa0 RCX: 00007fae7658ebe9 RDX: 0000000000000050 RSI: 0000200000000080 RDI: 000000000000000a RBP: 00007fae76611e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fae767c6038 R14: 00007fae767c5fa0 R15: 00007ffe5431da58 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__phys_addr+0x17b/0x180 arch/x86/mm/physaddr.c:23 Code: 50 cf fa 8d 48 89 de 4c 89 f2 e8 10 9a 8a 03 e9 4d ff ff ff e8 66 25 4b 00 90 0f 0b e8 5e 25 4b 00 90 0f 0b e8 56 25 4b 00 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 RSP: 0018:ffffc90002c0fba8 EFLAGS: 00010293 RAX: ffffffff817486fa RBX: 000000007ffffff9 RCX: ffff888107c99cc0 RDX: 0000000000000000 RSI: 000000007ffffff9 RDI: 000000001fffffff RBP: 00000000fffffff9 R08: ffffffff8fa38037 R09: 1ffffffff1f47006 R10: dffffc0000000000 R11: fffffbfff1f47007 R12: 0000000000000000 R13: 0000000000000000 R14: 000000007ffffff9 R15: dffffc0000000000 FS: 00007fae773f76c0(0000) GS:ffff8881a3c1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b31a63fff CR3: 000000001f48c000 CR4: 00000000000006f0 *** If these findings have caused you to resend the series or submit a separate fix, please add the following tag to your commit message: Tested-by: syzbot@syzkaller.appspotmail.com --- This report is generated by a bot. It may contain errors. syzbot ci engineers can be reached at syzkaller@googlegroups.com.