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===================================================== BUG: KMSAN: use-after-free in veth_xmit+0x2da/0xb70 drivers/net/veth.c:254 CPU: 1 PID: 932 Comm: kworker/u4:19 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 veth_xmit+0x2da/0xb70 drivers/net/veth.c:254 __netdev_start_xmit include/linux/netdevice.h:4524 [inline] netdev_start_xmit include/linux/netdevice.h:4538 [inline] xmit_one net/core/dev.c:3470 [inline] dev_hard_start_xmit+0x531/0xab0 net/core/dev.c:3486 __dev_queue_xmit+0x37de/0x4220 net/core/dev.c:4063 dev_queue_xmit+0x4b/0x60 net/core/dev.c:4096 batadv_send_skb_packet+0x59b/0x8c0 net/batman-adv/send.c:108 batadv_send_broadcast_skb+0x76/0x90 net/batman-adv/send.c:127 batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:393 [inline] batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:419 [inline] batadv_iv_send_outstanding_bat_ogm_packet+0x97e/0xd50 net/batman-adv/bat_iv_ogm.c:1706 process_one_work+0x1555/0x1f40 kernel/workqueue.c:2264 worker_thread+0xef6/0x2450 kernel/workqueue.c:2410 kthread+0x4b5/0x4f0 kernel/kthread.c:256 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:353 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:144 [inline] kmsan_internal_poison_shadow+0x66/0xd0 mm/kmsan/kmsan.c:127 kmsan_slab_free+0x6e/0xb0 mm/kmsan/kmsan_hooks.c:107 slab_free_freelist_hook mm/slub.c:1477 [inline] slab_free mm/slub.c:3040 [inline] kfree+0x565/0x30a0 mm/slub.c:3993 __netdev_name_node_alt_destroy net/core/dev.c:322 [inline] netdev_name_node_alt_destroy+0x587/0x690 net/core/dev.c:334 rtnl_alt_ifname net/core/rtnetlink.c:3518 [inline] rtnl_linkprop+0x939/0xc00 net/core/rtnetlink.c:3567 rtnl_dellinkprop+0x9d/0xb0 net/core/rtnetlink.c:3588 rtnetlink_rcv_msg+0x1153/0x1570 net/core/rtnetlink.c:5438 netlink_rcv_skb+0x451/0x650 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x50/0x60 net/core/rtnetlink.c:5456 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0xf9e/0x1100 net/netlink/af_netlink.c:1328 netlink_sendmsg+0x1246/0x14d0 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x12b6/0x1350 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x451/0x5f0 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg+0x97/0xb0 net/socket.c:2437 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2437 do_syscall_64+0xb8/0x160 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x44/0xa9 =====================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2020/03/16 05:32 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | 749688d2 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2020/03/16 05:31 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | 749688d2 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2020/03/10 16:51 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | 35f53e45 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2020/03/07 16:53 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | 2e9971bb | .config | console log | report | ci-upstream-kmsan-gce | |||||
2020/03/01 13:22 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | c88c7b75 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2020/02/29 22:21 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | 59b57593 | .config | console log | report | ci-upstream-kmsan-gce | |||||
2020/03/16 05:36 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | 749688d2 | .config | console log | report | ci-upstream-kmsan-gce-386 | |||||
2020/03/05 08:34 | https://github.com/google/kmsan.git master | 8bbbc5cf3dca | c88c7b75 | .config | console log | report | ci-upstream-kmsan-gce-386 |