From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f70.google.com (mail-io1-f70.google.com [209.85.166.70]) (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 71E2A11C83 for ; Sat, 4 May 2024 10:21:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.70 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714818085; cv=none; b=Omz8MlSNmyX+fDx4AxdHX33AN2p96i2ywmEunYo5iUilUT3eSYm1FSf7SwK/q2lJzMAoB3MJGCCVP0xiwkM8Mh1JWMsbQqqDUotA/fcK2QskqZ9+WNbM5l/3buvrJcyP4bW5GOFn27aZYZKJZTlQpFNpN2SDfFioAUpr9sX5AkY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714818085; c=relaxed/simple; bh=cBA8x8fOwo00ICBO/mY2Xz9sJ+/8GFPnrUE4hgLj2PA=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=plMRNKU8fi5bJzz5acgD6Da+VHZ0citXiPUkBqgh5bFiMlI4ptQjrsyiRT04cZxcDiKMVpkf7A9Hjcorlh0IFvx4mjPang3wrH+AFqDvPA0mQUaqBjrVtDEh5ugsAGaSghy0NvhVeSNwRvD+Yov48t7Dl0DAQAFicsjp6COQgMU= 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=209.85.166.70 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-f70.google.com with SMTP id ca18e2360f4ac-7dee81b7e97so51470439f.3 for ; Sat, 04 May 2024 03:21:23 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1714818082; x=1715422882; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=aM8nxrdqTrmhaDBzQpTqKBGgBDB2k8pSRetXT9GNHFA=; b=iLHWgznBVnR691ej7sSOt9x4eogzstL2kTdyo8Dbs98zmSz6khmneyUjwFKPRl2Ngn n340YDJpfoKoqbo6+9Soqh8C5QYVPGIlUCK1BjJB+LMxvW6mDj3AzJ2oMvH2k4fv+kUK OZUq3DtgWpzBuxjYbAwhfGQJFkrdpNzojzfLNPvEOLk8iZ9SIse1oDnPtGxjprTtgwG9 kvL3djpwJXPZMRTLp2I8ddqDIStwW+JOJ2bAD7KgM2DtAUN5OzO4JPxeEezBP5Yy9ru8 9ttEieJ/AvsWtU3M3MIFFQSBFQRrDaX47KUaaYC8CGj7Xfg/dzQ5kaODnt1vb72YnXRW RB2g== X-Forwarded-Encrypted: i=1; AJvYcCUjKanf50noImQQ+nOWz1M7x7KWpokceuoPrTmmGdmwdRZpukklAnzQsImZQkwgw0EEVKBvkEY82bALZdH5ML6RUOjd X-Gm-Message-State: AOJu0YwaJtpaDHh6AnONwuH1iZtlwk1nGOE5dQLk/dHIVXnS1c3zM/Gr pXMzG6QBv23Ci/u78Yc/NHJD3cjFpv+13f8P6+QoBgxghB2TzeYa3MN86+18EArYAvxUBH8KUjx PmnFWy3HUbl01+XKlbJU2R9hn8dUPWW6OexfyZMvhLo2c6Qe6LPa7Zj0= X-Google-Smtp-Source: AGHT+IF3ruQHv9nM+a2/JmuYgwc/Xc4fXzFeReeG9K6uoc39hS7Ii9gleqlXbFBo9fS4apMFtIpuPQGgncaKMOmM8jwQbzEGI0MJ Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:4387:b0:487:591e:6df3 with SMTP id bo7-20020a056638438700b00487591e6df3mr172683jab.2.1714818082672; Sat, 04 May 2024 03:21:22 -0700 (PDT) Date: Sat, 04 May 2024 03:21:22 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ac237d06179e3237@google.com> Subject: [syzbot] [bpf?] KASAN: slab-use-after-free Read in htab_map_alloc (2) From: syzbot To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org, daniel@iogearbox.net, eddyz87@gmail.com, haoluo@google.com, john.fastabend@gmail.com, jolsa@kernel.org, kpsingh@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: 2506f6229bd0 Merge branch 'net-dsa-adjust_link-removal' git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=11ac64ef180000 kernel config: https://syzkaller.appspot.com/x/.config?x=15dda165e1d20cf1 dashboard link: https://syzkaller.appspot.com/bug?extid=061f58eec3bde7ee8ffa compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/fc61e6a6e169/disk-2506f622.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/3ed6cc1ccbe5/vmlinux-2506f622.xz kernel image: https://storage.googleapis.com/syzbot-assets/c6ea42464245/bzImage-2506f622.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+061f58eec3bde7ee8ffa@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 Read of size 8 at addr ffff88805fe2c298 by task syz-executor.1/5906 CPU: 1 PID: 5906 Comm: syz-executor.1 Not tainted 6.9.0-rc5-syzkaller-01473-g2506f6229bd0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 lockdep_register_key+0x253/0x3f0 kernel/locking/lockdep.c:1225 htab_map_alloc+0x9b/0xe60 kernel/bpf/hashtab.c:506 map_create+0x90c/0x1200 kernel/bpf/syscall.c:1333 __sys_bpf+0x6d1/0x810 kernel/bpf/syscall.c:5659 __do_sys_bpf kernel/bpf/syscall.c:5784 [inline] __se_sys_bpf kernel/bpf/syscall.c:5782 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5782 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7781e7dea9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f7782c720c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f7781fabf80 RCX: 00007f7781e7dea9 RDX: 0000000000000048 RSI: 0000000020000140 RDI: 0100000000000000 RBP: 00007f7781eca4a4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f7781fabf80 R15: 00007ffe14057dd8 Allocated by task 5593: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc_node_track_caller+0x24e/0x4e0 mm/slub.c:3986 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:597 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:666 alloc_skb include/linux/skbuff.h:1308 [inline] alloc_skb_with_frags+0xc3/0x770 net/core/skbuff.c:6455 sock_alloc_send_pskb+0x91a/0xa60 net/core/sock.c:2794 sock_alloc_send_skb include/net/sock.h:1766 [inline] llc_ui_sendmsg+0x48d/0xf80 net/llc/af_llc.c:971 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_sendmsg+0x134/0x200 net/socket.c:768 splice_to_socket+0xa13/0x10b0 fs/splice.c:889 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11e/0x220 fs/splice.c:1164 splice_direct_to_actor+0x58e/0xc90 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x28c/0x3e0 fs/splice.c:1233 do_sendfile+0x56d/0xdc0 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5593: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kfree+0x153/0x3a0 mm/slub.c:4390 skb_kfree_head net/core/skbuff.c:1033 [inline] skb_free_head net/core/skbuff.c:1045 [inline] skb_release_data+0x676/0x880 net/core/skbuff.c:1072 skb_release_all net/core/skbuff.c:1137 [inline] __kfree_skb net/core/skbuff.c:1151 [inline] kfree_skb_reason+0x1a3/0x3b0 net/core/skbuff.c:1187 llc_ui_sendmsg+0xb03/0xf80 net/llc/af_llc.c:1000 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_sendmsg+0x134/0x200 net/socket.c:768 splice_to_socket+0xa13/0x10b0 fs/splice.c:889 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0x11e/0x220 fs/splice.c:1164 splice_direct_to_actor+0x58e/0xc90 fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x28c/0x3e0 fs/splice.c:1233 do_sendfile+0x56d/0xdc0 fs/read_write.c:1295 __do_sys_sendfile64 fs/read_write.c:1362 [inline] __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1348 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805fe2c000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 664 bytes inside of freed 2048-byte region [ffff88805fe2c000, ffff88805fe2c800) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5fe28 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff80000000840(slab|head|node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000840 ffff888015042000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 head: 00fff80000000840 ffff888015042000 dead000000000100 dead000000000122 head: 0000000000000000 0000000000080008 00000001ffffffff 0000000000000000 head: 00fff80000000003 ffffea00017f8a01 dead000000000122 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5095, tgid 21395662 (syz-executor.0), ts 5095, free_ts 13812911031 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page+0x5f/0x160 mm/slub.c:2175 allocate_slab mm/slub.c:2338 [inline] new_slab+0x84/0x2f0 mm/slub.c:2391 ___slab_alloc+0xc73/0x1260 mm/slub.c:3525 __slab_alloc mm/slub.c:3610 [inline] __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmalloc_trace+0x269/0x360 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] rtnl_newlink+0xf2/0x20a0 net/core/rtnetlink.c:3723 rtnetlink_rcv_msg+0x89b/0x10d0 net/core/rtnetlink.c:6594 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8e1/0xcb0 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 __sys_sendto+0x3a4/0x4f0 net/socket.c:2191 __do_sys_sendto net/socket.c:2203 [inline] __se_sys_sendto net/socket.c:2199 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2199 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x986/0xab0 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 free_contig_range+0x9e/0x160 mm/page_alloc.c:6572 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1036 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1416 do_one_initcall+0x248/0x880 init/main.c:1245 do_initcall_level+0x157/0x210 init/main.c:1307 do_initcalls+0x3f/0x80 init/main.c:1323 kernel_init_freeable+0x435/0x5d0 init/main.c:1555 kernel_init+0x1d/0x2b0 init/main.c:1444 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88805fe2c180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805fe2c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805fe2c280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805fe2c300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805fe2c380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb 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