[Bug 591989] [NEW] BUG: scheduling while atomic: swapper/0/0x10000100 - ppp over irda serial

[Simon Eatough]

Public bug reported:

ubuntu 10.04 lucid running kernel 2.6.32.22-generic
When running  a ppp over irda serial connection between two machines I get the following kernel bug message:-

 BUG: scheduling while atomic: swapper/0/0x10000100
[ 1331.351203] Modules linked in: ircomm_tty irnet ircomm ppp_deflate zlib_deflate bsd_comp ppp_async nfsd lockd nfs_acl auth_rpcgss sunrpc exportfs irtty_sir sir_dev irda crc_ccitt fbcon tileblit font bitblit softcursor vga16fb vgastate snd_via82xx gameport snd_ac97_codec ac97_bus snd_pcm snd_timer snd_page_alloc snd_mpu401_uart nouveau ttm snd_rawmidi snd_seq_device drm_kms_helper drm ppdev snd psmouse via686a via_agp i2c_algo_bit parport_pc lp serio_raw i2c_viapro soundcore agpgart parport shpchp ne2k_pci pata_via 8390
[ 1331.351332] 
[ 1331.351345] Pid: 0, comm: swapper Not tainted (2.6.32-22-generic #36-Ubuntu) Product Name 
[ 1331.351356] EIP: 0060:[<c012982a>] EFLAGS: 00000246 CPU: 0
[ 1331.351377] EIP is at native_safe_halt+0xa/0x10
[ 1331.351385] EAX: c075e000 EBX: c07a0104 ECX: 00000000 EDX: 00000000
[ 1331.351394] ESI: 00000000 EDI: c0761000 EBP: c075ff7c ESP: c075ff7c
[ 1331.351403]  DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
[ 1331.351411] CR0: 8005003b CR2: 0a082808 CR3: 1afe0000 CR4: 000002d0
[ 1331.351420] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000
[ 1331.351427] DR6: ffff0ff0 DR7: 00000400
[ 1331.351434] Call Trace:
[ 1331.351455]  [<c010a750>] default_idle+0x40/0x90
[ 1331.351467]  [<c01021d4>] cpu_idle+0x94/0xd0
[ 1331.351492]  [<c05791b8>] rest_init+0x58/0x60
[ 1331.351511]  [<c07a38ec>] start_kernel+0x351/0x357
[ 1331.351523]  [<c07a33c7>] ? unknown_bootoption+0x0/0x19e
[ 1331.351535]  [<c07a30aa>] i386_start_kernel+0xaa/0xb1


The message is repeated every time the machine is pinged. 
This appears to be related to the irda stack, running ppp over serial works ok.

Thanks 
Simon.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New

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BUG: scheduling while atomic: swapper/0/0x10000100  - ppp over irda serial 
https://bugs.launchpad.net/bugs/591989
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