Re: [uml-devel] Fwd: Re: [uml-user] WARNING: at mm/slab_common.c:376 kmalloc_slab+0x33/0x80()

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

On 05/11/2013 02:27 PM, richard -rw- weinberger wrote:
> On Sat, May 11, 2013 at 2:26 PM, richard -rw- weinberger
> <richard.weinberger@gmail.com> wrote:
>> On Sat, May 11, 2013 at 1:01 PM, Sergei Trofimovic>> Toralf, please use the attached patch.
>> Maybe it helps us.
>> In theory we call kmalloc() with at most PAGE_SIZE, which is okay.
> 
> fixing -ENOATTACHMENT...

applying that patch on top of Linus' tree (v3.9-12555-g2dbd3ca) gives :


2013-05-11T15:15:37.166+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 5
2013-05-11T15:15:37.166+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 5
2013-05-11T15:15:37.166+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 12
2013-05-11T15:15:37.166+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 12
2013-05-11T15:15:37.166+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 12
2013-05-11T15:15:37.166+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 12
2013-05-11T15:15:37.000+02:00 trinity haveged: haveged starting up
2013-05-11T15:15:37.000+02:00 trinity haveged: haveged: Completed tot procedure B after 1171643 bytes
2013-05-11T15:15:38.000+02:00 trinity dhcpcd[777]: version 5.6.4 starting
2013-05-11T15:15:38.000+02:00 trinity dhcpcd[777]: ipv6_open: Address family not supported by protocol
2013-05-11T15:15:38.000+02:00 trinity haveged: haveged: Completed tot procedure A after 1035716 bytes
2013-05-11T15:15:38.000+02:00 trinity haveged: haveged: version: 1.5; arch: x86; vendor: GenuineIntel; cores: 1/1, buffer: 128
2013-05-11T15:15:38.000+02:00 trinity haveged: haveged: d_cache: 32K (000020), i_cache: 32K (000020), i_index: 19/40, i_size: 32653/60731
2013-05-11T15:15:38.000+02:00 trinity haveged: haveged: tot tests: BA8, continuous tests: B
2013-05-11T15:15:38.000+02:00 trinity haveged: haveged: Completed continuous procedure B after 1171643 bytes
2013-05-11T15:15:38.000+02:00 trinity dhcpcd[777]: eth0: rebinding lease of 192.168.1.63
2013-05-11T15:15:38.000+02:00 trinity dhcpcd[777]: eth0: acknowledged 192.168.1.63 from 192.168.0.254
2013-05-11T15:15:38.000+02:00 trinity dhcpcd[777]: eth0: checking for 192.168.1.63
2013-05-11T15:15:43.000+02:00 trinity dhcpcd[777]: eth0: leased 192.168.1.63 for infinity
2013-05-11T15:15:43.000+02:00 trinity dhcpcd[777]: forked to background, child pid 811
2013-05-11T15:15:44.000+02:00 trinity cron[855]: (CRON) STARTUP (V5.0)
2013-05-11T15:15:44.944+02:00 trinity kernel: Virtual console 1 assigned device '/dev/pts/6'
2013-05-11T15:16:01.000+02:00 trinity sshd[874]: pam_unix(sshd:session): session opened for user tfoerste by (uid=0)
2013-05-11T15:16:02.827+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 1
2013-05-11T15:16:02.827+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 1
2013-05-11T15:16:02.827+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 25
2013-05-11T15:16:02.827+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 25
2013-05-11T15:16:02.827+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: -14
2013-05-11T15:16:02.827+02:00 trinity kernel: ------------[ cut here ]------------
2013-05-11T15:16:02.827+02:00 trinity kernel: WARNING: at mm/slab_common.c:376 kmalloc_slab+0x33/0x80()
2013-05-11T15:16:02.827+02:00 trinity kernel: CPU: 0 PID: 880 Comm: trinity-child0 Not tainted 3.9.0-12555-g2dbd3ca-dirty #1
2013-05-11T15:16:02.827+02:00 trinity kernel: 40db7da0 40db7dcc 0807bfca 083d3e6c 083d8623 00000178 080e1273 080e1273 
2013-05-11T15:16:02.827+02:00 trinity kernel: ffffffea 000000d0 00001000 40db7ddc 0807c093 00000009 00000000 40db7df0 
2013-05-11T15:16:02.835+02:00 trinity kernel: 080e1273 083d8623 00000178 00000000 40db7e14 080fac7b fffffff2 000000d0 40db7d74:  [<08060cff>] show_stack+0xcf/0x100
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7d98:  [<0835d63a>] dump_stack+0x26/0x28
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7da8:  [<0807bfca>] warn_slowpath_common+0x5a/0x80
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7dd0:  [<0807c093>] warn_slowpath_null+0x23/0x30
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7de0:  [<080e1273>] kmalloc_slab+0x33/0x80
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7df4:  [<080fac7b>] __kmalloc_track_caller+0x1b/0x110
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7e18:  [<080de1a6>] memdup_user+0x26/0x70
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7e34:  [<080de3de>] strndup_user_debug+0x6e/0xb0
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7e58:  [<0811dd48>] copy_mount_string+0x38/0x50
2013-05-11T15:16:02.835+02:00 trinity kernel: 40db7e70:  [<0811e760>] SyS_mount+0x30/0xf0
2013-05-11T15:16:02.842+02:00 trinity kernel: 40db7eac:  [<08062ac2>] handle_syscall+0x82/0xb0
2013-05-11T15:16:02.842+02:00 trinity kernel: 40db7ef4:  [<0807519d>] userspace+0x46d/0x590
2013-05-11T15:16:02.842+02:00 trinity kernel: 40db7fec:  [<0805f7fc>] fork_handler+0x6c/0x70
2013-05-11T15:16:02.842+02:00 trinity kernel: 40db7ffc:  [<00000000>] 0x0
2013-05-11T15:16:02.842+02:00 trinity kernel: 
2013-05-11T15:16:02.842+02:00 trinity kernel: ---[ end trace 06fc96a70dca162e ]---
2013-05-11T15:16:02.842+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: -14
2013-05-11T15:16:02.842+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: -14
2013-05-11T15:16:02.842+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: -14
2013-05-11T15:16:02.842+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 16
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 16
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 1
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 1
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: 70
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: 70
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: strnlen_user() returned: -14
2013-05-11T15:16:02.850+02:00 trinity kernel: strndup_user_debug: calling memdup_user() with length: -14

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

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