[uml-devel] trinity triggers often "WARNING: at mm/mmap.c:2757 exit_mmap+0x164/0x170()"

["Toralf Förster" <toralf.foerster@gmx.de>]

at an UML guest (32 bit stable Gentoo both at host and guest,
host has kernel version 3.9.2, guest has kernel version 3.10-rc1 + 2 patches from -rw-).


The syslog says :

2013-05-12T13:45:38.381+02:00 trinity kernel: ------------[ cut here ]------------
2013-05-12T13:45:38.381+02:00 trinity kernel: WARNING: at mm/mmap.c:2757 exit_mmap+0x164/0x170()
2013-05-12T13:45:38.381+02:00 trinity kernel: CPU: 0 PID: 1193 Comm: trinity-child0 Not tainted 3.10.0-rc1-00002-gcaec151 #5
2013-05-12T13:45:38.381+02:00 trinity kernel: 3f68fd9c 3f68fdc8 0807bfca 083d51bc 083d9a7a 00000ac5 080eb914 080eb914 
2013-05-12T13:45:38.381+02:00 trinity kernel: 000004f0 3f59b8c0 3eaafb3c 3f68fdd8 0807c093 00000009 00000000 3f68fe10 
2013-05-12T13:45:38.381+02:00 trinity kernel: 080eb914 083d9a7a 00000ac5 c0000000 00000000 40716660 3f59b8c0 00000000 3f68fd70:  [<08060d2f>] show_stack+0xcf/0x100
2013-05-12T13:45:38.381+02:00 trinity kernel: 3f68fd94:  [<0835ed99>] dump_stack+0x26/0x28
2013-05-12T13:45:38.381+02:00 trinity kernel: 3f68fda4:  [<0807bfca>] warn_slowpath_common+0x5a/0x80
2013-05-12T13:45:38.381+02:00 trinity kernel: 3f68fdcc:  [<0807c093>] warn_slowpath_null+0x23/0x30
2013-05-12T13:45:38.381+02:00 trinity kernel: 3f68fddc:  [<080eb914>] exit_mmap+0x164/0x170
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68fe14:  [<0807991d>] mmput+0x3d/0xb0
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68fe28:  [<08081086>] do_exit+0x2f6/0x880
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68fe78:  [<080816f9>] do_group_exit+0xa9/0xf0
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68fea0:  [<08081759>] SyS_exit_group+0x19/0x20
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68feac:  [<08062ac2>] handle_syscall+0x82/0xb0
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68fef4:  [<0807519d>] userspace+0x46d/0x590
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68ffec:  [<0805f82c>] fork_handler+0x6c/0x70
2013-05-12T13:45:38.386+02:00 trinity kernel: 3f68fffc:  [<00000000>] 0x0
2013-05-12T13:45:38.386+02:00 trinity kernel: 
2013-05-12T13:45:38.386+02:00 trinity kernel: ---[ end trace ae0a9ee7fbe3a27c ]---


and that's correlated to this trinity log:

...
[1193] [63] getrusage(who=0x39b6c710, ru=0) = -1 (Invalid argument)
[1193] [64] fchmodat(dfd=10, filename="/mnt/n22/v/victims/f08", mode=2) = -1 (Permission denied)
[1193] [65] pipe2(fildes=0, flags=0x80800) = -1 (Bad address)
[1193] [66] setgroups(gidsetsize=4096, grouplist=1) = -1 (Operation not permitted)
[1193] [67] uselib(library=1) = -1 (Bad address)
[1193] [68] sigpending(set=0) = -1 (Bad address)
[1193] [69] readv(fd=9, vec=0x80c59e0, vlen=1) = -1 (Bad file descriptor)
[1193] [70] preadv(fd=9, vec=0x80c5bd8, vlen=3, pos_l=4096, pos_h=0x45ab84d0) = -1 (Illegal seek)
[1193] [71] rmdir(pathname="<D9> <U+0487><D9> <U+0487><D9> <U+0487><D9> <U+0487><D9> <U+0487><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0>
<E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><B8><E0><U+0ABB><EF>ҩ <88><88><D2><D2>
<88><BB><EF>ҩ <88><88><D2><D2>
<88>
<BF>܉̈ҿ̈ҿ
<BF>܉<89><B9>
<BF>܉<89><B9><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89>
<89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><89><B9><B8><E0><E0><AA>̈ҿ̈ҿ̈ҿ<89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0><89><89><B9><B9><E0><E0>
<89><BB><EF>ҩ <88><88><D2><D2>
<88>̈ҿ̈ҿ̈ҿ<B8><E0><E0><AA>T̫̺̳o̬̜ ì̬͎̲̟nv̖̗̻̣̹̕o͖̗̠̜̤k͍͚̹͖̼e̦̗̪͍̪͍ ̬ͅt̕h̠͙̮͕͓e̱̜̗͙̭ ̥͔̫͙̪͍̣͝ḥi̼̦͈̼v̩̟͚̞͎e͈̟̻͙̦̤-m̷̘̝̱í͚̞̦̳n̝̲̯̙̮͞d̴̺̦͕̫ ̗̭̘͎͖r̞͎̜̜͖͎̫͢ep͇r̝̯̝͖͉͎̺e̴s̥e̵̖̳͉͍̩̗n̢͓̪͕̜̰̠̦t̺̞̰i͟n̮̦̖̟g̮͍̱̻͍̜̳ ̳c̖̮̙̣̰̠̩h̷̗͍̖͙̭͇͈a̧͎̯̹̲̺̫ó̭̞̜̣̯͕s̶̤̮̩̘.̨̻̪̖͔  ̳̭̦̭̭̦̞́I̠͍̮n͇̹̪̬v̴͖̭̗̖o̸k̬̤͓͚̠͍i͜n̛̩̹͉̘̹g͙ ̠̥ͅt̰͖͞h̫̼̪e̟̩̝ ̭̠̲̫͔fe̤͇̝̱e͖̮̠̹̭͖͕l͖̲̘͖̠̪i̢̖͎̮̗̯͓̩n̸̰g̙̱̘̗͚̬ͅ ͍o͍͍̩̮͢f̖͓̦̥ ̘͘c̵̫̱̗͚") = -1 (File name too long)
[1019] Random reseed: 212204951
= -1 (Invalid argument)

...

[watchdog] kernel became tainted! Last seed was 212204951
child 1194 exiting
[1018] Watchdog exiting

Ran 85915 syscalls. Successes: 14336  Failures: 71564


-- 
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3

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