While starting a user mode linux image I observed this in the user mode linux
syslog with latest git kernel + 3 UML patches on top
linux-v3.10-9292-g621fa28), the UML client is a 32 bit Gentoo Linux (host too
FWIW).
Is this worth to be reported to the LKML even in this early state of a new
kernel release ?
2013-07-13T20:25:48.000+02:00 trinity rpc.statd[999]: Running as root. chown
/var/lib/nfs to choose different user
2013-07-13T20:25:49.000+02:00 trinity sm-notify[1041]: Version 1.2.6 starting
2013-07-13T20:25:49.646+02:00 trinity kernel:
=============================================================================
2013-07-13T20:25:49.646+02:00 trinity kernel: BUG kmalloc-256 (Not tainted):
Poison overwritten
2013-07-13T20:25:49.646+02:00 trinity kernel:
-----------------------------------------------------------------------------
2013-07-13T20:25:49.646+02:00 trinity kernel:
2013-07-13T20:25:49.646+02:00 trinity kernel: Disabling lock debugging due to
kernel taint
2013-07-13T20:25:49.646+02:00 trinity kernel: INFO: 0x483025f8-0x483025fb.
First byte 0xe4 instead of 0x6b
2013-07-13T20:25:49.646+02:00 trinity kernel: INFO: Allocated in
rpc_new_client+0x81/0x3a0 age=0 cpu=0 pid=1048
2013-07-13T20:25:49.646+02:00 trinity kernel: INFO: Freed in
rpc_new_client+0x35a/0x3a0 age=0 cpu=0 pid=1048
2013-07-13T20:25:49.646+02:00 trinity kernel: INFO: Slab 0x0a01d740 objects=13
used=13 fp=0x (null) flags=0x0080
2013-07-13T20:25:49.646+02:00 trinity kernel: INFO: Object 0x483025f0
@offset=1520 fp=0x48302d10
2013-07-13T20:25:49.648+02:00 trinity kernel:
2013-07-13T20:25:49.648+02:00 trinity kernel: Bytes b4 483025e0: 15 04 00 00 2e
91 ff ff 5a 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 483025f0: 6b 6b 6b 6b 6b
6b 6b 6b e4 2b 30 48 6b 6b 6b 6b kkkkkkkk.+0Hkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302600: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302610: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302620: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302630: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302640: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302650: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.648+02:00 trinity kernel: Object 48302660: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 48302670: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 48302680: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 48302690: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 483026a0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 483026b0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 483026c0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 483026d0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:49.650+02:00 trinity kernel: Object 483026e0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
2013-07-13T20:25:49.650+02:00 trinity kernel: Redzone 483026f0: bb bb bb bb
....
2013-07-13T20:25:49.650+02:00 trinity kernel: Padding 48302718: 5a 5a 5a 5a 5a
5a 5a 5a ZZZZZZZZ
2013-07-13T20:25:49.654+02:00 trinity kernel: CPU: 0 PID: 1029 Comm: rpc.idmapd
Tainted: G B 3.10.0-09292-g621fa28 #1
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7a1c 46cf7a48 080f78b0
084ab0f8 483025f0 000005f0 48302d10 0a01d740
2013-07-13T20:25:49.654+02:00 trinity kernel: 483025f8 00000004 483025fb
46cf7a80 080f7e88 084ab1d8 483025f8 483025fb
2013-07-13T20:25:49.654+02:00 trinity kernel: 000000e4 0000006b 0000005a
483025f0 0a01d740 48049c00 48049c00 483025f0 46cf79f0: [<0805fb1f>]
show_stack+0xcf/0x100
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7a14: [<0840345d>]
dump_stack+0x26/0x28
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7a24: [<080f78b0>]
print_trailer+0xe0/0xf0
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7a4c: [<080f7e88>]
check_bytes_and_report+0xa8/0x100
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7a84: [<080f7fb8>]
check_object+0xd8/0x210
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7ac0: [<08401a84>]
alloc_debug_processing+0x7d/0x10e
2013-07-13T20:25:49.654+02:00 trinity kernel: 46cf7ae4: [<084023cd>]
__slab_alloc.constprop.74+0x356/0x3a4
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7b70: [<080fae85>]
__kmalloc_track_caller+0x85/0x160
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7b98: [<082c90f3>]
__kmalloc_reserve.isra.47+0x33/0x90
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7bc0: [<082c9276>]
__alloc_skb+0x76/0x210
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7bec: [<082c65a1>]
sock_alloc_send_pskb+0xb1/0x320
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7c34: [<082c683e>]
sock_alloc_send_skb+0x2e/0x30
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7c50: [<08344831>]
unix_stream_sendmsg+0x161/0x3b0
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7ca8: [<082c23be>]
sock_sendmsg+0x7e/0xa0
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7d6c: [<082c378a>]
SyS_sendto+0xea/0x120
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7e44: [<082c37f6>]
SyS_send+0x36/0x40
2013-07-13T20:25:49.656+02:00 trinity kernel: 46cf7e64: [<082c4247>]
SyS_socketcall+0x167/0x300
2013-07-13T20:25:49.658+02:00 trinity kernel: 46cf7eac: [<080618e2>]
handle_syscall+0x82/0xb0
2013-07-13T20:25:49.658+02:00 trinity kernel: 46cf7ef4: [<08073d6d>]
userspace+0x46d/0x590
2013-07-13T20:25:49.658+02:00 trinity kernel: 46cf7fec: [<0805e65c>]
fork_handler+0x6c/0x70
2013-07-13T20:25:49.658+02:00 trinity kernel: 46cf7ffc: [<00000000>] 0x0
2013-07-13T20:25:49.658+02:00 trinity kernel:
2013-07-13T20:25:49.658+02:00 trinity kernel: FIX kmalloc-256: Restoring
0x483025f8-0x483025fb=0x6b
2013-07-13T20:25:49.658+02:00 trinity kernel:
2013-07-13T20:25:49.658+02:00 trinity kernel: FIX kmalloc-256: Marking all
objects used
2013-07-13T20:25:50.019+02:00 trinity kernel:
=============================================================================
2013-07-13T20:25:50.019+02:00 trinity kernel: BUG kmalloc-256 (Tainted: G B
): Poison overwritten
2013-07-13T20:25:50.019+02:00 trinity kernel:
-----------------------------------------------------------------------------
2013-07-13T20:25:50.019+02:00 trinity kernel:
2013-07-13T20:25:50.019+02:00 trinity kernel: INFO: 0x46e0d398-0x46e0d39b.
First byte 0x34 instead of 0x6b
2013-07-13T20:25:50.019+02:00 trinity kernel: INFO: Allocated in
rpc_new_client+0x81/0x3a0 age=3 cpu=0 pid=1050
2013-07-13T20:25:50.019+02:00 trinity kernel: INFO: Freed in
rpc_new_client+0x35a/0x3a0 age=3 cpu=0 pid=1050
2013-07-13T20:25:50.019+02:00 trinity kernel: INFO: Slab 0x09ff38a0 objects=13
used=13 fp=0x (null) flags=0x0080
2013-07-13T20:25:50.019+02:00 trinity kernel: INFO: Object 0x46e0d390
@offset=912 fp=0x46e0dd10
2013-07-13T20:25:50.019+02:00 trinity kernel:
2013-07-13T20:25:50.020+02:00 trinity kernel: Bytes b4 46e0d380: 00 00 00 00 00
00 00 00 5a 5a 5a 5a 5a 5a 5a 5a ........ZZZZZZZZ
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d390: 6b 6b 6b 6b 6b
6b 6b 6b 34 d1 e0 46 6b 6b 6b 6b kkkkkkkk4..Fkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d3a0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d3b0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d3c0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d3d0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d3e0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d3f0: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d400: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.020+02:00 trinity kernel: Object 46e0d410: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d420: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d430: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d440: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d450: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d460: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d470: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk
2013-07-13T20:25:50.021+02:00 trinity kernel: Object 46e0d480: 6b 6b 6b 6b 6b
6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk.
2013-07-13T20:25:50.021+02:00 trinity kernel: Redzone 46e0d490: bb bb bb bb
....
2013-07-13T20:25:50.021+02:00 trinity kernel: Padding 46e0d4b8: 5a 5a 5a 5a 5a
5a 5a 5a ZZZZZZZZ
2013-07-13T20:25:50.021+02:00 trinity kernel: CPU: 0 PID: 1029 Comm: rpc.idmapd
Tainted: G B 3.10.0-09292-g621fa28 #1
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7a1c 46cf7a48 080f78b0
084ab0f8 46e0d390 00000390 46e0dd10 09ff38a0
2013-07-13T20:25:50.022+02:00 trinity kernel: 46e0d398 00000004 46e0d39b
46cf7a80 080f7e88 084ab1d8 46e0d398 46e0d39b
2013-07-13T20:25:50.022+02:00 trinity kernel: 00000034 0000006b 0000005a
46e0d390 09ff38a0 48049c00 48049c00 46e0d390 46cf79f0: [<0805fb1f>]
show_stack+0xcf/0x100
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7a14: [<0840345d>]
dump_stack+0x26/0x28
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7a24: [<080f78b0>]
print_trailer+0xe0/0xf0
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7a4c: [<080f7e88>]
check_bytes_and_report+0xa8/0x100
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7a84: [<080f7fb8>]
check_object+0xd8/0x210
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7ac0: [<08401a84>]
alloc_debug_processing+0x7d/0x10e
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7ae4: [<084023cd>]
__slab_alloc.constprop.74+0x356/0x3a4
2013-07-13T20:25:50.022+02:00 trinity kernel: 46cf7b70: [<080fae85>]
__kmalloc_track_caller+0x85/0x160
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7b98: [<082c90f3>]
__kmalloc_reserve.isra.47+0x33/0x90
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7bc0: [<082c9276>]
__alloc_skb+0x76/0x210
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7bec: [<082c65a1>]
sock_alloc_send_pskb+0xb1/0x320
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7c34: [<082c683e>]
sock_alloc_send_skb+0x2e/0x30
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7c50: [<08344831>]
unix_stream_sendmsg+0x161/0x3b0
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7ca8: [<082c23be>]
sock_sendmsg+0x7e/0xa0
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7d6c: [<082c378a>]
SyS_sendto+0xea/0x120
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7e44: [<082c37f6>]
SyS_send+0x36/0x40
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7e64: [<082c4247>]
SyS_socketcall+0x167/0x300
2013-07-13T20:25:50.023+02:00 trinity kernel: 46cf7eac: [<080618e2>]
handle_syscall+0x82/0xb0
2013-07-13T20:25:50.025+02:00 trinity kernel: 46cf7ef4: [<08073d6d>]
userspace+0x46d/0x590
2013-07-13T20:25:50.025+02:00 trinity kernel: 46cf7fec: [<0805e65c>]
fork_handler+0x6c/0x70
2013-07-13T20:25:50.025+02:00 trinity kernel: 46cf7ffc: [<00000000>] 0x0
2013-07-13T20:25:50.025+02:00 trinity kernel:
2013-07-13T20:25:50.025+02:00 trinity kernel: FIX kmalloc-256: Restoring
0x46e0d398-0x46e0d39b=0x6b
2013-07-13T20:25:50.025+02:00 trinity kernel:
2013-07-13T20:25:50.025+02:00 trinity kernel: FIX kmalloc-256: Marking all
objects used
2013-07-13T20:25:50.000+02:00 trinity dhcpcd[970]: eth0: sending IPv6 Router
Solicitation
2013-07-13T20:25:52.000+02:00 trinity cron[1113]: (CRON) STARTUP (V5.0)
2
--
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
------------------------------------------------------------------------------
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