On Mon, 2006-12-11 at 14:10 -0800, Andrew Morton wrote: > > pktcdvd: writer pktcdvd0 mapped to sr0 > > ------------[ cut here ]------------ > > kernel BUG at drivers/scsi/scsi_lib.c:1118! > > invalid opcode: 0000 [#1] > > Modules linked in: pktcdvd snd_seq_oss snd_seq_midi_event snd_seq bonding > > snd_pcm_oss snd_mixer_oss af_packet snd_ens1371 gameport snd_rawmidi snd_seq_device > > snd_ac97_codec snd_ac97_bus snd_pcm via686a snd_timer snd_page_alloc w83781d > > snd soundcore hwmon_vid i2c_isa i2c_viapro binfmt_misc loop nls_iso8859_15 nls_ > > cp850 vfat fat reiserfs via_agp agpgart lp parport_pc parport 8250 serial_core > > pcspkr rtc ohci1394 ieee1394 uhci_hcd usbcore sr_mod cdrom dm_mirror dm_mod sd > > _mod pata_via libata scsi_mod > > CPU: 0 > > EIP: 0060:[<e0833017>] Not tainted VLI > > EFLAGS: 00010002 (2.6.19-gaf1713e0 #5) > > EIP is at scsi_prep_fn+0x10b/0x24f [scsi_mod] > > eax: c15f9c34 ebx: dfc00be4 ecx: dfc39628 edx: c15f9c34 > > esi: dfc39598 edi: c15f7448 ebp: c156daf0 esp: c156dad0 > > ds: 007b es: 007b ss: 0068 > > Process vol_id (pid: 2099, ti=c156c000 task=dff6a570 task.ti=c156c000) > > Stack: 00011200 c1479de0 00000833 c15f9c34 c15f7448 c15f9c34 c15f7448 c15f7448 > > c156db14 c019ed65 dfc23d28 dfc39690 c156db0c c15f9c34 dfc39598 dfc34000 > > c15f7448 c156db44 e08335db 00000082 00000082 c15f7448 dfc39628 c01a1465 > > Call Trace: > > [<c0103a92>] show_trace_log_lvl+0x1a/0x2f > > [<c0103b42>] show_stack_log_lvl+0x9b/0xa3 > > [<c0103cdc>] show_registers+0x192/0x268 > > [<c0103e9c>] die+0xea/0x1bd > > [<c0103fe8>] do_trap+0x79/0x91 > > [<c01047c6>] do_invalid_op+0x97/0xa1 > > [<c027fac4>] error_code+0x74/0x7c > > [<c019ed65>] elv_next_request+0x6b/0x116 > > [<e08335db>] scsi_request_fn+0x5e/0x26d [scsi_mod] > > [<c019ee6a>] elv_insert+0x5a/0x134 > > [<c019efc1>] __elv_add_request+0x7d/0x82 > > [<c019f0ab>] elv_add_request+0x16/0x1d > > [<e0e8d2ed>] pkt_generic_packet+0x107/0x133 [pktcdvd] > > [<e0e8d772>] pkt_get_disc_info+0x42/0x7b [pktcdvd] > > [<e0e8eae3>] pkt_open+0xbf/0xc56 [pktcdvd] > > [<c0168078>] do_open+0x7e/0x246 > > [<c01683df>] blkdev_open+0x28/0x51 > > [<c014a057>] __dentry_open+0xb5/0x160 > > [<c014a183>] nameidata_to_filp+0x27/0x37 > > [<c014a1c6>] do_filp_open+0x33/0x3b > > [<c014a211>] do_sys_open+0x43/0xc7 > > [<c014a2cd>] sys_open+0x1c/0x1e > > [<c0102b82>] sysenter_past_esp+0x5f/0x85 > > ======================= > > Code: 74 1d 66 83 78 60 00 75 04 0f 0b eb fe 89 d8 e8 3d fe ff ff 85 c0 89 c7 74 > > 43 e9 00 01 00 00 8b 55 ec 83 ba 90 00 00 00 00 74 04 <0f> 0b eb fe 8b 45 ec > > 83 b8 98 00 00 00 00 74 04 0f 0b eb fe c7 > > EIP: [<e0833017>] scsi_prep_fn+0x10b/0x24f [scsi_mod] SS:ESP 0068:c156dad0 > > > > > > Steps to reproduce: > > - load an UDF-formatted DVD-RW > > - issue "modprobe pktcdvd" > > - issue "pktsetup dvd /dev/sr0" > > > > Notes: > > > > I did a git-bisect, which gave this result: > > commit b00315799d78f76531b71435fbc2643cd71ae4c > > (http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=3b00315799d78f76531b71435fbc2643cd71ae4c) > > Author: Christoph Hellwig <hch@xxxxxx> > > Date: Sat Nov 4 20:10:55 2006 +0100 > > [SCSI] untangle scsi_prep_fn > > This is as a result of extra checking introduced into the prep function. What it's BUGgin on is the fact that the request has no bio with non-zero transfer length. This seems to be a legitimate complaint precipitated by the fact that pkt_generic_packet doesn't call blk_rq_map_kern which would have generated the bio. James - To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
