"journalctl --list-boots" hangs with endless loop of mmap() and munmap()

Solution Unverified - Updated -

Issue

  • "journalctl --list-boots" hangs with endless loop of mmap() and munmap().
  • strace:
66407 14:08:47.931034 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 50, 0x3dd7000) = 0x7fc205a0a000 <0.000018>
66407 14:08:47.931148 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 32, 0x19ac000) = 0x7fc20520a000 <0.000016>
66407 14:08:47.931438 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 32, 0x2bf5000) = 0x7fc204a0a000 <0.000017>
66407 14:08:47.931495 mmap(NULL, 4243456, PROT_READ, MAP_SHARED, 32, 0x33f4000) = 0x7fc2045fe000 <0.000016>
66407 14:08:47.931582 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 35, 0x1908000) = 0x7fc203dfe000 <0.000016>
66407 14:08:47.931629 munmap(0x7fc20d0d5000, 8388608) = 0 <0.000026>
66407 14:08:47.931756 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 45, 0x23eb000) = 0x7fc20d0d5000 <0.000017>
66407 14:08:47.931804 munmap(0x7fc20c8d5000, 8388608) = 0 <0.000021>
66407 14:08:47.931866 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 46, 0x2f3d000) = 0x7fc20c8d5000 <0.000017>
66407 14:08:47.931915 munmap(0x7fc20c20a000, 7122944) = 0 <0.000017>
66407 14:08:47.932001 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 10, 0x919000) = 0x7fc2035fe000 <0.000017>
66407 14:08:47.932049 munmap(0x7fc20920a000, 8388608) = 0 <0.000018>
66407 14:08:47.932104 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 10, 0x1c58000) = 0x7fc20920a000 <0.000015>
66407 14:08:47.932150 munmap(0x7fc20aa0a000, 8388608) = 0 <0.000037>
[..]
66407 14:21:43.808058 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 46, 0x28ed000) = 0x7fc1ffb3f000 <0.000008>
66407 14:21:43.808080 munmap(0x7fc209cc9000, 8388608) = 0 <0.000008>
66407 14:21:43.808107 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 50, 0x3af1000) = 0x7fc209cc9000 <0.000007>
66407 14:21:43.808130 munmap(0x7fc20c8d5000, 8388608) = 0 <0.000008>
66407 14:21:43.808158 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 6, 0x17d5000) = 0x7fc20c8d5000 <0.000008>
66407 14:21:43.808182 munmap(0x7fc20320a000, 8388608) = 0 <0.000008>
66407 14:21:43.808217 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 22, 0xad2000) = 0x7fc20320a000 <0.000007>
66407 14:21:43.808240 munmap(0x7fc20c0d5000, 8388608) = 0 <0.000008>
66407 14:21:43.808264 mmap(NULL, 8388608, PROT_READ, MAP_SHARED, 22, 0x2bca000) = 0x7fc20c0d5000 <0.000007>

Environment

  • Red Hat Enterprise Linux (RHEL) 7
  • systemd
  • multiple systemd versions, i.e. systemd-219-30.el7_3.6.x86_64 upgraded from an earlier version

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