possible deadlock in proc_pid_personality
Status: upstream: reported syz repro on 2020/03/06 22:45
First crash: 154d, last: 144d

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: fixed by (bisect log):

commit 2db9dbf71bf98d02a0bf33e798e5bfd2a9944696
Author: Bernd Edlinger <>
Date: Fri Mar 20 20:27:24 2020 +0000

  proc: Use new infrastructure to fix deadlocks in execve

similar bugs (1):
Kernel Title Repro Bisected Count Last Reported Patched Status
linux-4.19 possible deadlock in proc_pid_personality 3 6d18h 44d 0/1 upstream: reported on 2020/06/24 20:24

Sample crash report:

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro Maintainers
ci-upstream-kasan-gce-smack-root 2020/03/06 19:01 upstream 63623fd4 c88c7b75 .config log report syz,,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/03/16 14:26 upstream fb33c651 749688d2 .config log report,,,,,,,,
ci-upstream-kasan-gce-smack-root 2020/03/06 16:55 upstream 63623fd4 c88c7b75 .config log report,,,,,,,,,