syzbot


INFO: task hung in rtnetlink_rcv_msg
Status: upstream: reported C repro on 2019/02/22 17:00
Reported-by: syzbot+8218a8a0ff60c19b8eae@syzkaller.appspotmail.com
First crash: 975d, last: 8h02m

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: task hung in addrconf_dad_work (log)
Repro: C syz .config

Fix bisection: the fix commit could be any of (bisect log):
  2618500dd370 arm: dts: mediatek: Update mt7629 dts to reflect the latest dt-binding
  c9b96eb6da2a Merge branch 'Update-MT7629-to-support-PHYLINK-API'
  4e3eff5beafa net: ethernet: mediatek: Fix MT7629 missing GMII mode support
  cab209e571a9 tcp: fix a possible lockdep splat in tcp_done()
  8d045995ed5b Merge branch 'mpls-push-pop-fix'
  b790b5549bdf net: dsa: sja1105: Use the correct style for SPDX License Identifier
  39f13ea2f61b net: avoid potential infinite loop in tc_ctl_action()
  fa4e0f8855fc net/sched: fix corrupted L2 header with MPLS 'push' and 'pop' actions
  28aa7c86c2b4 sched: etf: Fix ordering of packets with same txtime
  dedc5a08da07 net: avoid errors when trying to pop MLPS header on non-MPLS packets
  63dfb7938b13 sctp: change sctp_prot .no_autobind with true
  a03681dd5d1b net: cavium: Use the correct style for SPDX License Identifier
  61c1d33daf7b net: i82596: fix dma_alloc_attr for sni_82596
  b31141d390f1 net: dsa: microchip: Use the correct style for SPDX License Identifier
  539825a53604 davinci_cpdma: make cpdma_chan_split_pool static
  ddc790e92b3a net: ethernet: broadcom: have drivers select DIMLIB as needed
  bad28d889cae net: stmmac: make tc_flow_parsers static
  f913eac8e555 net: Update address for vrf and l3mdev in MAINTAINERS
  92696286f3bb net: bcmgenet: Set phydev->dev_flags only for internal PHYs
  efb86fede98c net: bcmgenet: Fix RGMII_MODE_EN value for GENET v1/2/3
  77b6d09f4ae6 net: usb: sr9800: fix uninitialized local variable
  b0818f80c8c1 blackhole_netdev: fix syzkaller reported issue
  bd74708cd979 Revert "blackhole_netdev: fix syzkaller reported issue"
similar bugs (6):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in rtnetlink_rcv_msg (2) 8 8d06h 87d 0/1 upstream: reported on 2021/07/23 04:37
linux-4.19 INFO: task hung in rtnetlink_rcv_msg 11 340d 662d 0/1 auto-closed as invalid on 2021/03/12 19:03
upstream INFO: task can't die in rtnetlink_rcv_msg 5 376d 385d 17/22 fixed on 2020/11/16 12:12
upstream INFO: task can't die in synchronize_rcu_expedited 1 428d 424d 0/22 auto-closed as invalid on 2020/10/15 13:33
upstream INFO: task can't die in synchronize_rcu_expedited (2) 2 271d 273d 0/22 auto-closed as invalid on 2021/03/21 09:06
upstream INFO: task hung in nl80211_pre_doit 5 255d 332d 0/22 auto-closed as invalid on 2021/05/17 09:21

Sample crash report:

Crashes (191):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/09/22 12:10 upstream 92477dd1faa6 169724fe .config log report syz C INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2019/02/17 08:10 upstream 64c0133eb88a f42dee6d .config log report syz C
ci-upstream-kasan-gce-smack-root 2019/02/17 07:52 upstream 64c0133eb88a f42dee6d .config log report syz C
ci-upstream-net-this-kasan-gce 2019/02/16 09:43 net 24f0a48743a2 f42dee6d .config log report syz C
ci-upstream-net-kasan-gce 2020/10/06 07:58 net-next c2568c8c9e63 1880b4a9 .config log report syz C
ci-upstream-net-kasan-gce 2019/02/16 15:27 net-next bb015f2216fe f42dee6d .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2021/01/06 23:52 linux-next 7e4525a4232f c104d4a3 .config log report syz C
ci-upstream-linux-next-kasan-gce-root 2019/02/16 09:44 linux-next 7a92eb7cc1dc f42dee6d .config log report syz C
ci-upstream-kasan-gce-root 2021/09/30 20:43 upstream 02d5e016800d 1d849ab4 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/29 19:28 upstream 02d5e016800d be530f6c .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/29 16:40 upstream 02d5e016800d be530f6c .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/29 05:22 upstream a4e6f95a891a d82cb927 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/27 19:04 upstream 5816b3e6577e 78494d16 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/26 04:41 upstream a5e0aceabef6 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/26 03:01 upstream a5e0aceabef6 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/25 10:22 upstream 7d42e9818258 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/24 07:17 upstream f9e36107ec70 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/23 08:41 upstream cf1d2c3e7e2f 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce 2021/09/22 15:37 upstream 92477dd1faa6 169724fe .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/22 02:19 upstream 92477dd1faa6 169724fe .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/21 16:46 upstream d9fb678414c0 169724fe .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/21 01:06 upstream e4e737bb5c17 af796c18 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/20 20:04 upstream e4e737bb5c17 af796c18 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/20 18:28 upstream e4e737bb5c17 af796c18 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/19 13:27 upstream d4d016caa4b8 70b76c1d .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/18 22:35 upstream 93ff9f13be91 70b76c1d .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/18 11:14 upstream 4357f03d6611 70b76c1d .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/18 09:49 upstream 4357f03d6611 70b76c1d .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/18 04:54 upstream ddf21bd8ab98 70b76c1d .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/17 15:09 upstream bdb575f87217 5b989942 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/17 14:01 upstream bdb575f87217 5b989942 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/17 01:12 upstream ff1ffd71d5f0 aae492f2 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/16 20:29 upstream ff1ffd71d5f0 aae492f2 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce 2021/09/16 12:49 upstream b7213ffa0e58 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/16 05:23 upstream b7213ffa0e58 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/15 23:49 upstream b7213ffa0e58 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/15 12:54 upstream 3ca706c189db 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/15 10:29 upstream 3ca706c189db 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/15 00:00 upstream 1619b69edce1 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/14 16:29 upstream d0ee23f9d78b 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/14 00:04 upstream d0ee23f9d78b 58d09404 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-smack-root 2021/09/13 20:24 upstream 6880fa6c5660 3ce60af8 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/13 16:17 upstream 6880fa6c5660 3ce60af8 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/13 05:35 upstream f306b90c69ce 5ae8508a .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/13 00:55 upstream f306b90c69ce 5ae8508a .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/12 21:26 upstream f306b90c69ce 5ae8508a .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/11 15:44 upstream 926de8c4326c 5ae8508a .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-selinux-root 2021/09/11 06:31 upstream 926de8c4326c 5ae8508a .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-root 2021/09/11 04:02 upstream 926de8c4326c 5ae8508a .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-386 2021/09/30 04:19 upstream 02d5e016800d be530f6c .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-386 2021/09/29 14:52 upstream a4e6f95a891a be530f6c .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-386 2021/09/28 23:01 upstream d33bec7b3dfa d82cb927 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-386 2021/09/25 23:12 upstream a5e0aceabef6 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-386 2021/09/22 21:57 upstream cf1d2c3e7e2f 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce-386 2021/09/14 15:14 upstream d0ee23f9d78b 07e953c1 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-net-this-kasan-gce 2021/09/20 06:23 net e30cd812dffa 70b76c1d .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-bpf-kasan-gce 2021/06/28 22:55 bpf d6765985a42a 9d2ab5df .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-net-kasan-gce 2021/10/18 15:16 net-next d40dfa0cebd8 0c5d9412 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-net-kasan-gce 2021/10/18 14:13 net-next d40dfa0cebd8 0c5d9412 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-net-kasan-gce 2021/10/18 12:51 net-next d40dfa0cebd8 0c5d9412 .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-net-kasan-gce 2021/09/23 00:21 net-next 428168f99517 8cac236e .config log report info INFO: task hung in rtnetlink_rcv_msg
ci-upstream-kasan-gce 2021/01/07 16:12 upstream 71c061d24438 c104d4a3 .config log report info
ci-qemu-upstream 2019/11/30 13:21 upstream 81b6b96475ac 3a75be00 .config log report
ci-upstream-linux-next-kasan-gce-root 2021/09/20 13:15 linux-next 1f77990c4b79 70b76c1d .config log report info INFO: task can't die in synchronize_rcu_expedited
ci-upstream-linux-next-kasan-gce-root 2021/09/20 07:59 linux-next 9004fd387338 70b76c1d .config log report info INFO: task can't die in synchronize_rcu_expedited
ci-upstream-linux-next-kasan-gce-root 2021/09/16 13:22 linux-next 368847b165bb 07e953c1 .config log report info INFO: task can't die in synchronize_rcu_expedited
ci-upstream-linux-next-kasan-gce-root 2021/09/15 16:57 linux-next 70ced02f322f 07e953c1 .config log report info INFO: task can't die in rtnetlink_rcv_msg
ci-upstream-linux-next-kasan-gce-root 2021/09/12 00:01 linux-next aa14a3016182 5ae8508a .config log report info INFO: task can't die in synchronize_rcu_expedited