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================================================================== BUG: KASAN: use-after-free in rds_tcp_kill_sock net/rds/tcp.c:530 [inline] BUG: KASAN: use-after-free in rds_tcp_dev_event+0xc01/0xc90 net/rds/tcp.c:568 Read of size 8 at addr ffff8801cd879200 by task kworker/u4:3/147 CPU: 0 PID: 147 Comm: kworker/u4:3 Not tainted 4.14.0-rc7+ #156 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_address_description+0x73/0x250 mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report+0x25b/0x340 mm/kasan/report.c:409 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 rds_tcp_kill_sock net/rds/tcp.c:530 [inline] rds_tcp_dev_event+0xc01/0xc90 net/rds/tcp.c:568 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x51/0x90 net/core/dev.c:1671 call_netdevice_notifiers net/core/dev.c:1687 [inline] netdev_run_todo+0x437/0xca0 net/core/dev.c:7846 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:106 default_device_exit_batch+0x4b4/0x5d0 net/core/dev.c:8664 ops_exit_list.isra.6+0x100/0x150 net/core/net_namespace.c:145 cleanup_net+0x5c7/0xb50 net/core/net_namespace.c:483 process_one_work+0xbf0/0x1bc0 kernel/workqueue.c:2113 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x35e/0x430 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 Allocated by task 30987: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xad/0xe0 mm/kasan/kasan.c:551 __do_kmalloc_node mm/slab.c:3689 [inline] __kmalloc_node_track_caller+0x47/0x70 mm/slab.c:3703 __kmalloc_reserve.isra.40+0x41/0xd0 net/core/skbuff.c:138 __alloc_skb+0x13b/0x740 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:976 [inline] netlink_dump+0x2ba/0xb90 net/netlink/af_netlink.c:2162 netlink_recvmsg+0x9b6/0x1300 net/netlink/af_netlink.c:1945 sock_recvmsg_nosec net/socket.c:806 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:813 SYSC_recvfrom+0x2d6/0x570 net/socket.c:1802 SyS_recvfrom+0x40/0x50 net/socket.c:1774 entry_SYSCALL_64_fastpath+0x1f/0xbe Freed by task 30987: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x43/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x71/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3503 [inline] kfree+0xca/0x250 mm/slab.c:3820 skb_free_head+0x74/0xb0 net/core/skbuff.c:554 skb_release_data+0x58c/0x790 net/core/skbuff.c:574 skb_release_all+0x4a/0x60 net/core/skbuff.c:631 __kfree_skb net/core/skbuff.c:645 [inline] consume_skb+0x153/0x490 net/core/skbuff.c:705 skb_free_datagram+0x1a/0xe0 net/core/datagram.c:330 netlink_recvmsg+0x5c6/0x1300 net/netlink/af_netlink.c:1941 sock_recvmsg_nosec net/socket.c:806 [inline] sock_recvmsg+0xc9/0x110 net/socket.c:813 SYSC_recvfrom+0x2d6/0x570 net/socket.c:1802 SyS_recvfrom+0x40/0x50 net/socket.c:1774 entry_SYSCALL_64_fastpath+0x1f/0xbe The buggy address belongs to the object at ffff8801cd879200 which belongs to the cache kmalloc-8192 of size 8192 The buggy address is located 0 bytes inside of 8192-byte region [ffff8801cd879200, ffff8801cd87b200) The buggy address belongs to the page: page:ffffea0007361e00 count:1 mapcount:0 mapping:ffff8801cd879200 index:0x0 compound_mapcount: 0 flags: 0x200000000008100(slab|head) raw: 0200000000008100 ffff8801cd879200 0000000000000000 0000000100000001 raw: ffffea0007120720 ffffea0006757420 ffff8801dac02080 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cd879100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8801cd879180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff8801cd879200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cd879280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cd879300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2017/11/01 08:26 | upstream | 287683d027a3 | e775312e | .config | console log | report | ci-upstream-kasan-gce-386 |