possible deadlock in tty_port_close_start
Status: upstream: reported C repro on 2020/02/13 04:57
First crash: 251d, last: 44d

Cause bisection: the cause commit could be any of (bisect log):

  9211bfbff80a netfilter: add missing IS_ENABLED(CONFIG_BRIDGE_NETFILTER) checks to header-file.
  47e640af2e49 netfilter: add missing IS_ENABLED(CONFIG_NF_TABLES) check to header-file.
  a1b2f04ea527 netfilter: add missing includes to a number of header-files.
  0abc8bf4f284 netfilter: add missing IS_ENABLED(CONFIG_NF_CONNTRACK) checks to some header-files.
  bd96b4c75675 netfilter: inline four headers files into another one.
  43dd16efc7f2 netfilter: nf_tables: store data in offload context registers
  78458e3e08cd netfilter: add missing IS_ENABLED(CONFIG_NETFILTER) checks to some header-files.
  20a9379d9a03 netfilter: remove "#ifdef __KERNEL__" guards from some headers.
  bd8699e9e292 netfilter: nft_bitwise: add offload support
  2a475c409fe8 kbuild: remove all netfilter headers from header-test blacklist.
  7e59b3fea2a2 netfilter: remove unnecessary spaces
  1b90af292e71 ipvs: Improve robustness to the ipvs sysctl
  5785cf15fd74 netfilter: nf_tables: add missing prototypes.
  0a30ba509fde netfilter: nf_nat_proto: make tables static
  e84fb4b3666d netfilter: conntrack: use shared sysctl constants
  105333435b4f netfilter: connlabels: prefer static lock initialiser
  8c0bb7873815 netfilter: synproxy: rename mss synproxy_options field
  c162610c7db2 Merge git://

Fix bisection: failed (bisect log)
similar bugs (2):
Kernel Title Repro Bisected Count Last Reported Patched Status
linux-4.19 possible deadlock in tty_port_close_start 16 11d 258d 0/1 upstream: reported on 2020/02/05 23:51
linux-4.14 possible deadlock in tty_port_close_start 17 21d 248d 0/1 upstream: reported on 2020/02/15 19:33

Sample crash report:

Crashes (14):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Maintainers
ci-qemu-upstream 2020/06/13 18:52 upstream 435faf5c dbce178a .config log report syz C,,
ci-upstream-kasan-gce-root 2020/02/17 14:42 upstream 11a48a5a 2b411596 .config log report syz C,,
ci-upstream-kasan-gce-root 2020/09/06 23:37 upstream dd9fb9bb abf9ba4f .config log report,,
ci-upstream-kasan-gce-selinux-root 2020/08/20 10:50 upstream 7eac66d0 ed282a3a .config log report,,
ci-upstream-kasan-gce-root 2020/07/28 02:35 upstream 92ed3019 cb93dc6a .config log report,,
ci-upstream-kasan-gce-root 2020/06/18 05:18 upstream 7ae77150 b9f3810b .config log report,,
ci-upstream-kasan-gce-root 2020/06/02 03:38 upstream 9bf9511e a0331e89 .config log report,,
ci-upstream-kasan-gce-selinux-root 2020/05/30 19:59 upstream 86852175 6f3e1c7c .config log report,,
ci-upstream-kasan-gce-root 2020/03/27 14:14 upstream f3e69428 7d95711b .config log report,,
ci-upstream-kasan-gce-root 2020/02/28 13:35 upstream f8788d86 59b57593 .config log report,,
ci-upstream-kasan-gce-root 2020/02/12 23:17 upstream f2850dd5 84f4fc8a .config log report,,
ci-upstream-linux-next-kasan-gce-root 2020/09/01 01:50 linux-next b36c9697 d5a3ae1f .config log report,,
ci-upstream-linux-next-kasan-gce-root 2020/08/12 12:40 linux-next bc09acc9 bb3e5fe6 .config log report,,
ci-upstream-linux-next-kasan-gce-root 2020/02/20 00:52 linux-next 1d7f85df b690a6e3 .config log report,,