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 0BEBC1A7241 for ; Tue, 3 Sep 2024 13:13:27 +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=1725369209; cv=none; b=SrEcOcId51q0WaiWbcNu6nfgFMhSAwG1jSj49rX8utFl2Nzxmq0LIOtGfrtF+lppERFRwzUS8TaP5TDUe1zXcY3HYffLI0dwf1sPqWQAwgtvDnf+fY0wKmRP3TsNaF7w9cGUg+QHoN9e45o6mXBn7dWOe3g+Zs18pyPLDCmJ7ik= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725369209; c=relaxed/simple; bh=Zpc+3nFvZNhC8+ppISj1MxWrUoORCFZOEitUinuAibo=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; 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List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6638:8624:b0:4c0:a8a5:81f5 with SMTP id 8926c6da1cb9f-4d017e9b260mr767715173.4.1725369207171; Tue, 03 Sep 2024 06:13:27 -0700 (PDT) Date: Tue, 03 Sep 2024 06:13:27 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000b341bb062136d2d9@google.com> Subject: [syzbot] [mptcp?] KASAN: slab-use-after-free Read in __timer_delete_sync From: syzbot To: davem@davemloft.net, edumazet@google.com, geliang@kernel.org, kuba@kernel.org, linux-kernel@vger.kernel.org, martineau@kernel.org, matttbe@kernel.org, mptcp@lists.linux.dev, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 1934261d8974 Merge tag 'input-for-v6.11-rc5' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=146be1db980000 kernel config: https://syzkaller.appspot.com/x/.config?x=996585887acdadb3 dashboard link: https://syzkaller.appspot.com/bug?extid=f3a31fb909db9b2a5c4d compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11229d09980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d02c28e8dbf3/disk-1934261d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/464d0e233034/vmlinux-1934261d.xz kernel image: https://storage.googleapis.com/syzbot-assets/8735d78fb16a/bzImage-1934261d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f3a31fb909db9b2a5c4d@syzkaller.appspotmail.com ================================================================== BUG: KASAN: slab-use-after-free in lock_release+0x151/0xa30 kernel/locking/lockdep.c:5772 Read of size 8 at addr ffff888076a77758 by task kworker/0:0/8 CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.11.0-rc5-syzkaller-00219-g1934261d8974 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: events mptcp_worker Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 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 lock_release+0x151/0xa30 kernel/locking/lockdep.c:5772 __timer_delete_sync+0x157/0x310 kernel/time/timer.c:1648 del_timer_sync include/linux/timer.h:185 [inline] sk_stop_timer_sync+0x1c/0x90 net/core/sock.c:3454 mptcp_pm_del_add_timer+0x18d/0x250 net/mptcp/pm_netlink.c:345 mptcp_incoming_options+0x158d/0x2570 net/mptcp/options.c:1166 tcp_data_queue+0xf5/0x76c0 net/ipv4/tcp_input.c:5206 tcp_rcv_established+0xfba/0x2020 net/ipv4/tcp_input.c:6230 tcp_v4_do_rcv+0x96d/0xc70 net/ipv4/tcp_ipv4.c:1911 tcp_v4_rcv+0x2dc0/0x37f0 net/ipv4/tcp_ipv4.c:2346 ip_protocol_deliver_rcu+0x22e/0x440 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x341/0x5f0 net/ipv4/ip_input.c:233 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 NF_HOOK+0x3a4/0x450 include/linux/netfilter.h:314 __netif_receive_skb_one_core net/core/dev.c:5661 [inline] __netif_receive_skb+0x2bf/0x650 net/core/dev.c:5775 process_backlog+0x662/0x15b0 net/core/dev.c:6108 __napi_poll+0xcb/0x490 net/core/dev.c:6772 napi_poll net/core/dev.c:6841 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6963 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 do_softirq+0x11b/0x1e0 kernel/softirq.c:455 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382 mptcp_pm_send_ack net/mptcp/pm_netlink.c:496 [inline] mptcp_pm_nl_addr_send_ack+0x3ec/0x4e0 net/mptcp/pm_netlink.c:785 mptcp_pm_nl_work+0x18e8/0x1fc0 net/mptcp/pm_netlink.c:924 mptcp_worker+0x12f/0x1440 net/mptcp/protocol.c:2759 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 5379: 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] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4189 kmalloc_noprof include/linux/slab.h:681 [inline] mptcp_pm_alloc_anno_list+0x14e/0x390 net/mptcp/pm_netlink.c:370 mptcp_pm_create_subflow_or_signal_addr+0x1920/0x22c0 net/mptcp/pm_netlink.c:586 mptcp_nl_add_subflow_or_signal_addr net/mptcp/pm_netlink.c:1356 [inline] mptcp_pm_nl_add_addr_doit+0x1276/0x1b80 net/mptcp/pm_netlink.c:1428 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5379: 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+0xe0/0x150 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:2252 [inline] slab_free mm/slub.c:4473 [inline] kfree+0x149/0x360 mm/slub.c:4594 remove_anno_list_by_saddr+0x156/0x190 net/mptcp/pm_netlink.c:1466 mptcp_pm_remove_addrs_and_subflows net/mptcp/pm_netlink.c:1687 [inline] mptcp_nl_remove_addrs_list net/mptcp/pm_netlink.c:1718 [inline] mptcp_pm_nl_flush_addrs_doit+0x664/0xd60 net/mptcp/pm_netlink.c:1759 genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline] genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2680 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888076a77700 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 88 bytes inside of freed 192-byte region [ffff888076a77700, ffff888076a777c0) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76a77 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xfdffffff(slab) raw: 00fff00000000000 ffff88801ac413c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 00000001fdffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x352800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 5373, tgid 5372 (syz.0.20), ts 69219069347, free_ts 69201611728 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2321 allocate_slab+0x5a/0x2f0 mm/slub.c:2484 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_node_noprof+0x286/0x440 mm/slub.c:4164 kmalloc_array_node_noprof include/linux/slab.h:788 [inline] alloc_slab_obj_exts mm/slub.c:1976 [inline] account_slab mm/slub.c:2447 [inline] allocate_slab+0xb6/0x2f0 mm/slub.c:2502 new_slab mm/slub.c:2537 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723 __slab_alloc+0x58/0xa0 mm/slub.c:3813 __slab_alloc_node mm/slub.c:3866 [inline] slab_alloc_node mm/slub.c:4025 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4044 reqsk_alloc_noprof net/ipv4/inet_connection_sock.c:920 [inline] inet_reqsk_alloc+0xa8/0x800 net/ipv4/inet_connection_sock.c:951 tcp_conn_request+0x252/0x34a0 net/ipv4/tcp_input.c:7179 tcp_rcv_state_process+0x1bd7/0x4570 net/ipv4/tcp_input.c:6716 tcp_v4_do_rcv+0x77d/0xc70 net/ipv4/tcp_ipv4.c:1934 page last free pid 5372 tgid 5372 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612 __slab_free+0x31b/0x3d0 mm/slub.c:4384 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3988 [inline] slab_alloc_node mm/slub.c:4037 [inline] __do_kmalloc_node mm/slub.c:4157 [inline] __kmalloc_noprof+0x1a6/0x400 mm/slub.c:4170 kmalloc_noprof include/linux/slab.h:685 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] tomoyo_encode2 security/tomoyo/realpath.c:45 [inline] tomoyo_encode+0x26f/0x540 security/tomoyo/realpath.c:80 tomoyo_path_perm+0x3ca/0x740 security/tomoyo/file.c:831 tomoyo_path_symlink+0xde/0x120 security/tomoyo/tomoyo.c:212 security_path_symlink+0xe3/0x140 security/security.c:1876 do_symlinkat+0x136/0x3a0 fs/namei.c:4592 __do_sys_symlinkat fs/namei.c:4610 [inline] __se_sys_symlinkat fs/namei.c:4607 [inline] __x64_sys_symlinkat+0x95/0xb0 fs/namei.c:4607 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888076a77600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888076a77680: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888076a77700: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888076a77780: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888076a77800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== --- 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. 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