2.6.35.4-28.fc14.i686.PAE tainted ?

[Michał Piotrowski]

Hi,

2010/10/5 J B <jb.1234abcd at gmail.com>:
> Hi,
> can anybody explain it ?
>
> After fresh Fedora install (from Fedora repo only) I found in
> "/var/log/messages" records as:
>
> Oct  1 07:08:26 ns kernel: ------------[ cut here ]------------
> Oct  1 07:08:26 ns kernel: WARNING: at lib/dma-debug.c:791
> check_unmap+0x7a/0x59b()
> Oct  1 07:08:26 ns kernel: Hardware name: EP45-DQ6
> Oct  1 07:08:26 ns kernel: dl2k 0000:09:00.0: DMA-API: device driver
> tries to free an invalid DMA memory address
> Oct  1 07:08:26 ns kernel: Modules linked in: bluetooth rfkill
> nf_nat_ftp nf_conntrack_ftp iptable_nat nf_nat xt_u32 ipt_LOG xt_limit
> uinput iTCO_wdt i2c_i801 iTCO_vendor_support r8169 mii i2c_core dl2k
> microcode raid1 [last unloaded: hwmon_vid]
> Oct  1 07:08:26 ns kernel: Pid: 2454, comm: ip Tainted: G        W
> 2.6.35.4-28.fc14.i686.PAE #1
> Oct  1 07:08:26 ns kernel: Call Trace:
> Oct  1 07:08:26 ns kernel: [<c0441f39>] warn_slowpath_common+0x6a/0x7f
> Oct  1 07:08:26 ns kernel: [<c05dfbc6>] ? check_unmap+0x7a/0x59b
> Oct  1 07:08:26 ns kernel: [<c0441fc1>] warn_slowpath_fmt+0x2b/0x2f
> Oct  1 07:08:26 ns kernel: [<c05dfbc6>] check_unmap+0x7a/0x59b
> Oct  1 07:08:26 ns kernel: [<c0467ae1>] ?
> print_lock_contention_bug+0x11/0xa8
> Oct  1 07:08:26 ns kernel: [<c0467dad>] ? lock_acquired+0x235/0x23d
> Oct  1 07:08:26 ns kernel: [<c05daf43>] ? debug_object_deactivate+0x28/0x92
> Oct  1 07:08:26 ns kernel: [<c05e0195>] debug_dma_unmap_page+0x5a/0x62
> Oct  1 07:08:26 ns kernel: [<f7e6b2d5>] pci_unmap_single+0x58/0x63 [dl2k]
> Oct  1 07:08:26 ns kernel: [<f7e6cd5c>] rio_close+0x9e/0x114 [dl2k]
> Oct  1 07:08:26 ns kernel: [<c075058a>] __dev_close+0x70/0x85
> Oct  1 07:08:26 ns kernel: [<c07519d9>] __dev_change_flags+0x98/0x10d
> Oct  1 07:08:26 ns kernel: [<c0751abe>] dev_change_flags+0x18/0x44
> Oct  1 07:08:26 ns kernel: [<c075a44f>] do_setlink+0x253/0x52e
> Oct  1 07:08:26 ns kernel: [<c0467ae1>] ?
> print_lock_contention_bug+0x11/0xa8
> Oct  1 07:08:26 ns kernel: [<c0467dad>] ? lock_acquired+0x235/0x23d
> Oct  1 07:08:26 ns kernel: [<c04d0bf9>] ? handle_mm_fault+0x342/0x8f4
> Oct  1 07:08:26 ns kernel: [<c075af7a>] rtnl_newlink+0x218/0x3a6
> Oct  1 07:08:26 ns kernel: [<c075ae18>] ? rtnl_newlink+0xb6/0x3a6
> Oct  1 07:08:26 ns kernel: [<c0467dad>] ? lock_acquired+0x235/0x23d
> Oct  1 07:08:26 ns kernel: [<c075a0f0>] ? rtnl_lock+0x14/0x16
> Oct  1 07:08:26 ns kernel: [<c075a0f0>] ? rtnl_lock+0x14/0x16
> Oct  1 07:08:26 ns kernel: [<c07e3e85>] ? __mutex_lock_common+0x2d0/0x2da
> Oct  1 07:08:26 ns kernel: [<c0467dad>] ? lock_acquired+0x235/0x23d
> Oct  1 07:08:26 ns kernel: [<c075ad62>] ? rtnl_newlink+0x0/0x3a6
> Oct  1 07:08:26 ns kernel: [<c075abb7>] rtnetlink_rcv_msg+0x19c/0x1ab
> Oct  1 07:08:26 ns kernel: [<c075aa1b>] ? rtnetlink_rcv_msg+0x0/0x1ab
> Oct  1 07:08:26 ns kernel: [<c076a19a>] netlink_rcv_skb+0x37/0x78
> Oct  1 07:08:26 ns kernel: [<c075a112>] rtnetlink_rcv+0x20/0x27
> Oct  1 07:08:26 ns kernel: [<c0769d7b>] netlink_unicast+0xc6/0x121
> Oct  1 07:08:26 ns kernel: [<c076a004>] netlink_sendmsg+0x22e/0x23b
> Oct  1 07:08:26 ns kernel: [<c0740d65>] __sock_sendmsg+0x56/0x5f
> Oct  1 07:08:26 ns kernel: [<c0741056>] sock_sendmsg+0x98/0xac
> Oct  1 07:08:26 ns kernel: [<c04ce553>] ? might_fault+0x4c/0x86
> Oct  1 07:08:26 ns kernel: [<c0469b00>] ? lock_release+0x17f/0x186
> Oct  1 07:08:26 ns kernel: [<c07497a1>] ? copy_from_user+0xd/0xf
> Oct  1 07:08:26 ns kernel: [<c0749ad7>] ? verify_iovec+0x43/0x70
> Oct  1 07:08:26 ns kernel: [<c0742b45>] sys_sendmsg+0x182/0x1e6
> Oct  1 07:08:26 ns kernel: [<c0467ae1>] ?
> print_lock_contention_bug+0x11/0xa8
> Oct  1 07:08:26 ns kernel: [<c0467dad>] ? lock_acquired+0x235/0x23d
> Oct  1 07:08:26 ns kernel: [<c04cec8e>] ? __do_fault+0x206/0x396
> Oct  1 07:08:26 ns kernel: [<c04cedf2>] ? __do_fault+0x36a/0x396
> Oct  1 07:08:26 ns kernel: [<c0469bb8>] ? lock_acquire+0xb1/0xbc
> Oct  1 07:08:26 ns kernel: [<c04ce553>] ? might_fault+0x4c/0x86
> Oct  1 07:08:26 ns kernel: [<c0469b00>] ? lock_release+0x17f/0x186
> Oct  1 07:08:26 ns kernel: [<c0742f43>] sys_socketcall+0x168/0x1a8
> Oct  1 07:08:26 ns kernel: [<c05d5d74>] ? trace_hardirqs_on_thunk+0xc/0x10
> Oct  1 07:08:26 ns kernel: [<c04089df>] sysenter_do_call+0x12/0x38
> Oct  1 07:08:26 ns kernel: ---[ end trace a70d91368aa35943 ]---
>
> Oops itself is probably suited for bug report, but what isn't clear for
> me is line
> Oct  1 07:08:26 ns kernel: Pid: 2454, comm: ip Tainted: G        W
> 2.6.35.4-28.fc14.i686.PAE #1
>
> Which module caused that kernel is tainted? I suppose Fedora contains
> only open SW including kernel modules, isn't then there something wrong?

>From kernel doc

"  1: 'G' if all modules loaded have a GPL or compatible license, 'P' if
     any proprietary module has been loaded.  Modules without a
     MODULE_LICENSE or with a MODULE_LICENSE that is not recognised by
     insmod as GPL compatible are assumed to be proprietary.
"

" 10: 'W' if a warning has previously been issued by the kernel.
     (Though some warnings may set more specific taint flags.)
"

Regards,
Michal