syzbot


INFO: task hung in addrconf_dad_work
Status: upstream: reported C repro on 2019/02/16 10:20
Reported-by: syzbot+f4290c15a8ab6dee87c9@syzkaller.appspotmail.com
First crash: 1072d, last: 4d21h

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: INFO: task hung in rtnl_lock (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 (5):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-414 INFO: task hung in addrconf_dad_work 1 636d 636d 0/1 auto-closed as invalid on 2019/10/25 08:37
android-49 INFO: task hung in addrconf_dad_work 1 923d 923d 0/3 auto-closed as invalid on 2019/02/22 20:09
linux-4.19 INFO: task hung in addrconf_dad_work 1 558d 558d 0/1 auto-closed as invalid on 2019/12/24 18:36
linux-4.19 INFO: task hung in addrconf_dad_work (2) C error 12 49d 349d 0/1 upstream: reported C repro on 2020/03/22 17:39
linux-4.14 INFO: task hung in addrconf_dad_work C 1 10d 130d 0/1 upstream: reported C repro on 2020/10/27 17:48

Sample crash report:

Crashes (146):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/01/14 14:13 upstream 65f0d241 269d24e8 .config log report syz C
ci-upstream-kasan-gce 2020/11/21 23:58 upstream 27bba9c5 68068804 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/02/16 10:13 upstream 5ded5871 f42dee6d .config log report syz C
ci-upstream-kasan-gce-386 2020/11/22 12:27 upstream a349e4c6 0d27f508 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/12/15 12:14 net 7f376f19 97183ed7 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/10/02 14:04 net bb13a800 9602ddf4 .config log report syz C
ci-upstream-net-kasan-gce 2020/12/15 17:54 net-next 7bca5021 97183ed7 .config log report syz C
ci-upstream-net-kasan-gce 2020/12/06 02:37 net-next bcd684aa 50503117 .config log report syz C
ci-upstream-net-kasan-gce 2020/10/07 14:45 net-next 9faebeb2 1880b4a9 .config log report syz C
ci-upstream-net-kasan-gce 2020/10/07 00:44 net-next 8b0308fe 1880b4a9 .config log report syz C
ci-upstream-net-this-kasan-gce 2020/10/11 07:18 net 7b50ee3d 4a77ae0b .config log report syz
ci-upstream-kasan-gce-root 2021/02/12 14:46 upstream dcc0b490 a5f86b15 .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-kasan-gce 2021/01/30 04:26 upstream bec4c296 fc9fd31e .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-kasan-gce-root 2021/01/30 00:56 upstream bec4c296 fc9fd31e .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-kasan-gce-root 2021/01/29 22:07 upstream bec4c296 fc9fd31e .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-kasan-gce 2021/01/27 00:59 upstream 13391c60 55a7d4df .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-kasan-gce-root 2021/01/19 04:45 upstream 1e2a199f 63631df1 .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-net-this-kasan-gce 2021/03/02 06:09 net 73f476aa 183afb6c .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-net-this-kasan-gce 2021/02/11 11:53 net 1bcc51ac a52ee10a .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-net-this-kasan-gce 2021/02/04 02:08 net a4dc7eee 624dad51 .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-net-kasan-gce 2021/01/31 00:17 net-next 14e8e0f6 fc9fd31e .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-net-kasan-gce 2021/01/18 16:06 net-next 213b97b1 63631df1 .config log report info INFO: task hung in addrconf_dad_work
ci-upstream-kasan-gce 2021/01/14 09:19 upstream 65f0d241 269d24e8 .config log report info
ci-upstream-kasan-gce-root 2021/01/02 13:31 upstream eda809ae 79264ae3 .config log report info
ci-upstream-kasan-gce-root 2020/12/30 21:35 upstream f6e1ea19 ecb8c012 .config log report info
ci-upstream-kasan-gce 2020/12/30 07:52 upstream 139711f0 0fa352f2 .config log report info
ci-upstream-kasan-gce 2020/12/20 10:17 upstream 467f8165 04201c06 .config log report info
ci-upstream-kasan-gce-root 2020/12/07 03:35 upstream e6585a49 c521566d .config log report info
ci-upstream-kasan-gce-root 2020/12/06 21:25 upstream e6585a49 c521566d .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/24 15:22 upstream f11901ed a1839e81 .config log report info
ci-upstream-kasan-gce 2020/10/15 00:00 upstream b5fc7a89 fc7735a2 .config log report info
ci-upstream-kasan-gce-root 2020/10/07 03:07 upstream c85fb28b 1880b4a9 .config log report info
ci-upstream-kasan-gce-selinux-root 2020/10/06 13:05 upstream 7575fdda 1880b4a9 .config log report info
ci-upstream-kasan-gce 2020/10/01 02:56 upstream 02de58b2 8516f6d3 .config log report info
ci-upstream-kasan-gce 2020/09/30 08:04 upstream ccc1d052 5abc3f1a .config log report info
ci-upstream-kasan-gce-386 2020/12/18 01:27 upstream d64c6f96 04201c06 .config log report info
ci-upstream-net-this-kasan-gce 2021/01/10 04:37 net c49243e8 2c1f2513 .config log report info
ci-upstream-net-this-kasan-gce 2020/12/06 16:08 net edd2410b f12ba0c5 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/18 15:57 net f355a55f fea47c01 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/07 11:49 net d91dc434 1880b4a9 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/06 20:05 net 7575fdda 1880b4a9 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/06 00:54 net 4296adc3 1880b4a9 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/03 05:39 net ab0faf5f 2653fa43 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/02 20:25 net ef9da46d 4969d6ca .config log report info
ci-upstream-net-this-kasan-gce 2020/10/02 16:20 net ef9da46d 4969d6ca .config log report info
ci-upstream-net-this-kasan-gce 2020/10/02 04:38 net bb13a800 9602ddf4 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/01 13:12 net a59cf619 a9767fb2 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/01 10:02 net a59cf619 a9767fb2 .config log report info
ci-upstream-net-this-kasan-gce 2020/10/01 02:26 net 2b3e981a 8516f6d3 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/30 14:52 net 2b3e981a 8516f6d3 .config log report info
ci-upstream-net-this-kasan-gce 2020/09/30 03:56 net c92a7982 5abc3f1a .config log report info
ci-upstream-bpf-kasan-gce 2019/10/18 23:20 bpf 11875ba7 8c88c9c1 .config log report
ci-upstream-net-kasan-gce 2021/01/16 19:52 net-next 9ab7e76a 65a7a854 .config log report info
ci-upstream-net-kasan-gce 2021/01/08 07:08 net-next 2e423387 c104d4a3 .config log report info
ci-upstream-net-kasan-gce 2021/01/04 01:08 net-next 3db1a3fa 79264ae3 .config log report info
ci-upstream-net-kasan-gce 2020/12/13 01:37 net-next 00f7763a bca53db9 .config log report info
ci-upstream-net-kasan-gce 2020/11/10 07:41 net-next a3ce2b10 64069d48 .config log report info
ci-upstream-net-kasan-gce 2020/10/31 08:00 net-next 1fb74191 18e33098 .config log report info
ci-upstream-net-kasan-gce 2020/10/31 06:19 net-next 1fb74191 18e33098 .config log report info
ci-upstream-net-kasan-gce 2020/10/15 07:12 net-next d25e2e93 fc7735a2 .config log report info
ci-upstream-net-kasan-gce 2020/10/07 01:17 net-next 8b0308fe 1880b4a9 .config log report info
ci-upstream-net-kasan-gce 2020/10/06 21:36 net-next 8b0308fe 1880b4a9 .config log report info
ci-upstream-bpf-next-kasan-gce 2019/10/10 07:23 bpf-next 25bfef43 c4b9981b .config log report
ci-upstream-net-kasan-gce 2018/03/30 16:13 net-next 18845557 d47f0ed6 .config log report
ci-upstream-linux-next-kasan-gce-root 2020/12/29 21:22 linux-next d7a03a44 80910769 .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/11/17 19:42 linux-next 7c8ca812 bd2a760b .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/10/02 22:12 linux-next 2172e358 4969d6ca .config log report info
ci-upstream-linux-next-kasan-gce-root 2020/10/01 16:45 linux-next d3929409 a9767fb2 .config log report info