From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f199.google.com (mail-il1-f199.google.com [209.85.166.199]) (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 591017318D for ; Sun, 18 Feb 2024 22:22:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.199 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708294940; cv=none; b=VvkF5kZsGQyyZL9sGwRxmBSqWsBdRhNlzhUfLHPBBPWvQ/9uFAsIvN/oq4IDPuAOqGp8xDfh+KNeIY3lR8xhI7S8oHvUn2Ghr+AEoxLQTRY0icca/HtRAJq7pHWWABXyJIDC9VnJy9AInOicuHrw0XVwTQLv/MDu/IZ5y+T8Dmc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708294940; c=relaxed/simple; bh=hKCkF2Nc02tElu4OZDLKcK7Rpu1cpp/hq4ESd91kik8=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=pYSe4gkU5wm9k91A9IY6k6sHT8Bcbs/DM3brDu18JoxoS9XALFigpLQS14Pr9iZFx5FSn0+v/T8NHhDgQXjh/KyKvjghsBUQ/NpphsQm1NZidj/0AkQjkE8gJ1IHkmEBLFZ14cA7gWsssGtEKt8fTIh6cFPBNN2+fFqHckBAzJY= 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=209.85.166.199 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-f199.google.com with SMTP id e9e14a558f8ab-365035aed34so28324025ab.1 for ; Sun, 18 Feb 2024 14:22:18 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708294937; x=1708899737; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=3ZYk1LMO5y6n5tGB1SFVJxfsyQYKQ7bfwvDflpKRAPI=; b=ijaOdhhF5abTSh5Mgqy2LWpMvtX9jpOoGekPzLKogjsiSQ5mmdd3cfaTYxNLWNhTCh XgYDcjAAd+a6v+MjQvQXd9mivQx7i85+J+jpEuK1tPBxb00vEu6BaLNn93hJOSpL49+H WESx8xs4w9dYdbBOT1DRdiifWA67nywJIXEsq2iXy4Hrmmj2K7NrTkBQRn7C59/b53uF ctk11QLVAO0YmUU8XWQgbefRrXengCkvSCw1mwYQQu2ipO4KqflarVGnebq7riMw8Dju oHQ4gnfPomKl/EmK35kPH3gX9eoCEqxpov12nEsooCQpSBZC4ed3WuBtsc9bR9QqAK5P qs/g== X-Forwarded-Encrypted: i=1; AJvYcCVBlViPsmH0wyTIvtNhqIUrON9oMtjT6U5gijHhQqvk/dQrfsGlWZUPgZfxuyFbnvXnUeDC16c3y+ltfBLeEGebjpXumPCn X-Gm-Message-State: AOJu0Yy35uPVG8PdGdB1BFIAj20lg6TUWzM4Sf4lgwaFYY3xeuN23MdU Jj6E48IaaBjRGHi6TECUzhgrbf5a3EijwLKIgKPTEYqUjLGEHC5hAuceYzsM6izoFsiugu9b4ik t6h2pheY47hwZfvpI7Q4YiNpoX7QbC83v8Xw2a1mkxxVVH3VjIoepdU8= X-Google-Smtp-Source: AGHT+IGJnExPV9Xp6gCG90zK3qSJ71JHKUOQY4H1LWGqTi9yZIMSzgcyvwkAvmwc6Dcuj0xwYH9KNyd3az04FZ7sgm6V8a5CwTTn Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:12cb:b0:365:3086:74f7 with SMTP id i11-20020a056e0212cb00b00365308674f7mr89848ilm.4.1708294937599; Sun, 18 Feb 2024 14:22:17 -0800 (PST) Date: Sun, 18 Feb 2024 14:22:17 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ed666a0611af6818@google.com> Subject: [syzbot] [net?] [bpf?] BUG: unable to handle kernel NULL pointer dereference in dev_map_hash_update_elem From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, davem@davemloft.net, haoluo@google.com, hawk@kernel.org, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martin.lau@linux.dev, netdev@vger.kernel.org, sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com, yonghong.song@linux.dev Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 7e90b5c295ec Merge tag 'trace-tools-v6.8-rc4' of git://git.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1460a080180000 kernel config: https://syzkaller.appspot.com/x/.config?x=f8ee3942159acc92 dashboard link: https://syzkaller.appspot.com/bug?extid=8cd36f6b65f3cafd400a compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 userspace arch: arm Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-7e90b5c2.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/79d91883bc70/vmlinux-7e90b5c2.xz kernel image: https://storage.googleapis.com/syzbot-assets/0dcf5ad6b94a/zImage-7e90b5c2.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+8cd36f6b65f3cafd400a@syzkaller.appspotmail.com 8<--- cut here --- Unable to handle kernel NULL pointer dereference at virtual address 00000014 when read [00000014] *pgd=85006003, *pmd=fe2d5003 Internal error: Oops: 207 [#1] PREEMPT SMP ARM Modules linked in: CPU: 1 PID: 7433 Comm: syz-executor.1 Not tainted 6.8.0-rc4-syzkaller #0 Hardware name: ARM-Versatile Express PC is at __dev_map_hash_lookup_elem kernel/bpf/devmap.c:269 [inline] PC is at __dev_map_hash_update_elem kernel/bpf/devmap.c:972 [inline] PC is at dev_map_hash_update_elem+0x90/0x210 kernel/bpf/devmap.c:1010 LR is at get_lock_parent_ip include/linux/ftrace.h:977 [inline] LR is at preempt_latency_start kernel/sched/core.c:5843 [inline] LR is at preempt_count_add+0x12c/0x150 kernel/sched/core.c:5868 pc : [<803e5ed8>] lr : [<8027b2b4>] psr: 60000093 sp : dfaf1da8 ip : dfaf1d68 fp : dfaf1de4 r10: 00000001 r9 : 84658000 r8 : 84e58110 r7 : 00000001 r6 : a0000013 r5 : 84e58000 r4 : ffffffff r3 : 00000001 r2 : 00000010 r1 : 00000000 r0 : a0000013 Flags: nZCv IRQs off FIQs on Mode SVC_32 ISA ARM Segment none Control: 30c5387d Table: 83e1be00 DAC: 00000000 Register r0 information: non-slab/vmalloc memory Register r1 information: NULL pointer Register r2 information: zero-size pointer Register r3 information: non-paged memory Register r4 information: non-paged memory Register r5 information: slab kmalloc-cg-512 start 84e58000 pointer offset 0 size 512 Register r6 information: non-slab/vmalloc memory Register r7 information: non-paged memory Register r8 information: slab kmalloc-cg-512 start 84e58000 pointer offset 272 size 512 Register r9 information: slab net_namespace start 84658000 pointer offset 0 size 3264 Register r10 information: non-paged memory Register r11 information: 2-page vmalloc region starting at 0xdfaf0000 allocated at kernel_clone+0xac/0x3c8 kernel/fork.c:2902 Register r12 information: 2-page vmalloc region starting at 0xdfaf0000 allocated at kernel_clone+0xac/0x3c8 kernel/fork.c:2902 Process syz-executor.1 (pid: 7433, stack limit = 0xdfaf0000) Stack: (0xdfaf1da8 to 0xdfaf2000) 1da0: dfaf1dc4 ffffffff 00000000 caa92d0f dfaf1de4 84e58000 1dc0: 824aeaf0 86a45440 86a45c80 84f14000 00000004 84e58000 dfaf1e14 dfaf1de8 1de0: 8038c070 803e5e54 00000001 00000000 80883e10 84e580b8 84f14001 84f14000 1e00: dfaf1ec8 86a45440 dfaf1e6c dfaf1e18 8038cff8 8038be80 00000001 00000000 1e20: 00000000 00000004 20000280 00000004 00000000 86a45c80 200002c0 00000000 1e40: dfaf1e6c 00000000 00000020 dfaf1ea0 00000002 200002c0 00000020 00000000 1e60: dfaf1f8c dfaf1e70 80392a58 8038cdb0 00000000 00000000 20000013 83f0d400 1e80: dfaf1ee0 dfaf1fb0 dfaf1ea4 dfaf1e98 80883e10 dfaf1ee0 dfaf1fb0 80200288 1ea0: 200002c0 00000000 00000008 00000000 00000008 8041ad38 00000000 00000000 1ec0: 00000000 00000000 00000003 00000000 20000240 00000000 20000280 00000000 1ee0: 00000001 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1f20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1f40: 00000000 00000000 00000000 00000000 00000000 00000000 80203134 caa92d0f 1f60: 8261c978 00000000 00000000 0014c2c8 00000182 80200288 83f0d400 00000182 1f80: dfaf1fa4 dfaf1f90 80394e5c 803927e8 200002c0 00000000 00000000 dfaf1fa8 1fa0: 80200060 80394e3c 00000000 00000000 00000002 200002c0 00000020 00000000 1fc0: 00000000 00000000 0014c2c8 00000182 7ec5132e 7ec5132f 003d0f00 76b440fc 1fe0: 76b43f08 76b43ef8 000167e8 00050bb0 60000010 00000002 00000000 00000000 Backtrace: [<803e5e48>] (dev_map_hash_update_elem) from [<8038c070>] (bpf_map_update_value+0x1fc/0x2d4 kernel/bpf/syscall.c:202) r10:84e58000 r9:00000004 r8:84f14000 r7:86a45c80 r6:86a45440 r5:824aeaf0 r4:84e58000 [<8038be74>] (bpf_map_update_value) from [<8038cff8>] (map_update_elem+0x254/0x460 kernel/bpf/syscall.c:1553) r8:86a45440 r7:dfaf1ec8 r6:84f14000 r5:84f14001 r4:84e580b8 [<8038cda4>] (map_update_elem) from [<80392a58>] (__sys_bpf+0x27c/0x2104 kernel/bpf/syscall.c:5445) r10:00000000 r9:00000020 r8:200002c0 r7:00000002 r6:dfaf1ea0 r5:00000020 r4:00000000 [<803927dc>] (__sys_bpf) from [<80394e5c>] (__do_sys_bpf kernel/bpf/syscall.c:5561 [inline]) [<803927dc>] (__sys_bpf) from [<80394e5c>] (sys_bpf+0x2c/0x48 kernel/bpf/syscall.c:5559) r10:00000182 r9:83f0d400 r8:80200288 r7:00000182 r6:0014c2c8 r5:00000000 r4:00000000 [<80394e30>] (sys_bpf) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xdfaf1fa8 to 0xdfaf1ff0) 1fa0: 00000000 00000000 00000002 200002c0 00000020 00000000 1fc0: 00000000 00000000 0014c2c8 00000182 7ec5132e 7ec5132f 003d0f00 76b440fc 1fe0: 76b43f08 76b43ef8 000167e8 00050bb0 Code: e595210c e1a06000 e2433001 e003300a (e7924103) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: e595210c ldr r2, [r5, #268] @ 0x10c 4: e1a06000 mov r6, r0 8: e2433001 sub r3, r3, #1 c: e003300a and r3, r3, sl * 10: e7924103 ldr r4, [r2, r3, lsl #2] <-- trapping instruction --- This report is generated by a bot. 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