Hello ! as suggested by Ian McDonald, i`m forwarding this to dccp and netdev mailing lists.
> hi ! > > i know dccp_ccid2 and ccid3 modules are considered experimental, but i`m > unsure if i probably triggered a bug inside or outside that modules here (i`m > no kernel developer) > > apparently, i got crashes when loading/unloading other driver modules just > after ccid2 or ccid3 had been loaded/unloaded _once_ (have not used them at > all, just modprobe module;modprobe -r module) > > this was detected during some hardcore module load/unload testing session and > apparently these modules seem to be the root cause of other modules crashing, > so they seem to leave the system in an inconsistent state after load/unload. > > this can be reproduced with recent 2.6.24rc6 kernel which was mostly built > with allmodconfig. > i could not reproduce this with a more minimalistic configuration, e.g. the > suse kernel of the day runs fine. > > the easiest way to reproduce is: > > while true;do modprobe dccp_ccid2/3;modprobe -r dccp_ccid2/3;done > after short time, the kernel oopses (messages below) > > i`m not sure if this is worth to be filed at kernel bugzilla, so i`m > contacting you personally first. > > i`d happily assist in helping debug this or provide more input (.config etc) > if you want to take a look. > > regards > Roland > > > [ 2322.177054] CCID: Unregistered CCID 2 (ccid2) > [ 2322.377927] CCID: Registered CCID 2 (ccid2) > > [ 2322.413793] BUG: unable to handle kernel paging request at virtual address > 40000864 > [ 2322.425066] printing eip: c01792e1 *pde = 00000000 > [ 2322.431523] Oops: 0000 [#1] SMP > [ 2322.435249] Modules linked in: dccp_ccid2 dccp edd iptable_filter > ip_tables ip6table_filter ip6_tables x_tables ipv6 microcode firmware_class > fuse loop dm_mod ide_cd cdrom pata_acpi ata_piix ahci parport_pc floppy > ata_generic parport pcnet32 rtc_cmos libata rtc_core rtc_lib mii pcspkr > container thermal piix generic i2c_piix4 processor button ac i2c_core > power_supply shpchp ide_core intel_agp pci_hotplug agpgart mousedev evdev sg > ext3 jbd mbcache sd_mod mptspi mptscsih mptbase scsi_transport_spi ehci_hcd > uhci_hcd scsi_mod usbcore > [ 2322.489115] > [ 2322.491535] Pid: 1730, comm: kjournald Not tainted (2.6.24-rc6 #4) > [ 2322.497266] EIP: 0060:[<c01792e1>] EFLAGS: 00010002 CPU: 0 > [ 2322.503205] EIP is at kmem_cache_alloc+0x5d/0xa6 > [ 2322.508789] EAX: 00000000 EBX: 00000282 ECX: c03750a0 EDX: 40000864 > [ 2322.514864] ESI: c1408314 EDI: 40000864 EBP: c03750a0 ESP: df9cfe94 > [ 2322.521110] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > [ 2322.527346] Process kjournald (pid: 1730, ti=df9ce000 task=deaf31a0 > task.ti=df9ce000) > [ 2322.535722] Stack: c016094d c1408314 40000864 00011200 df4032a0 df408e40 > def45000 0000000f > [ 2322.545350] 00011210 c016094d 00000010 e08cb15f 00000000 dead9c00 > df161ab8 00000004 > [ 2322.556833] 00000000 def45000 0000000f 00000000 c019acdf 00000000 > df402940 00000010 > [ 2322.565168] Call Trace: > [ 2322.568637] [<c016094d>] mempool_alloc+0x24/0xc2 > [ 2322.573169] [<c016094d>] mempool_alloc+0x24/0xc2 > [ 2322.577175] [<e08cb15f>] __journal_file_buffer+0x9b/0x11c [jbd] > [ 2322.585033] [<c019acdf>] bio_alloc_bioset+0x8c/0xe6 > [ 2322.589301] [<c019ad44>] bio_alloc+0xb/0x17 > [ 2322.593309] [<c0197688>] submit_bh+0x6e/0xf8 > [ 2322.597358] [<e08ccdba>] journal_commit_transaction+0x6de/0xbe8 [jbd] > [ 2322.605109] [<c013095c>] lock_timer_base+0x19/0x35 > [ 2322.610478] [<e08cf9e6>] kjournald+0xae/0x1dd [jbd] > [ 2322.616182] [<c0139985>] autoremove_wake_function+0x0/0x33 > [ 2322.621341] [<e08cf938>] kjournald+0x0/0x1dd [jbd] > [ 2322.628588] [<c01398bc>] kthread+0x38/0x60 > [ 2322.633306] [<c0139884>] kthread+0x0/0x60 > [ 2322.637365] [<c0107beb>] kernel_thread_helper+0x7/0x10 > [ 2322.645002] ======================= > [ 2322.649049] Code: 3e 85 ff 89 7c 24 08 75 1b 89 14 24 8b 54 24 0c 83 c9 ff > 89 e8 89 74 24 04 e8 2b fb ff ff 89 44 24 08 eb 0c 8b 54 24 08 8b 46 0c <8b> > 04 82 89 06 89 d8 50 9d 0f 1f 84 00 00 00 00 00 66 83 7c 24 > [ 2322.673340] EIP: [<c01792e1>] kmem_cache_alloc+0x5d/0xa6 SS:ESP > 0068:df9cfe94 > [ 2322.681327] ---[ end trace 35dbcab07ee48cc5 ]--- > [ 2322.737700] ------------[ cut here ]------------ > [ 2322.748822] Kernel BUG at c0199e6d [verbose debug info unavailable] > [ 2322.755960] invalid opcode: 0000 [#2] SMP > [ 2322.760773] Modules linked in: dccp_ccid2 dccp edd iptable_filter > ip_tables ip6table_filter ip6_tables x_tables ipv6 microcode firmware_class > fuse loop dm_mod ide_cd cdrom pata_acpi ata_piix ahci parport_pc floppy > ata_generic parport pcnet32 rtc_cmos libata rtc_core rtc_lib mii pcspkr > container thermal piix generic i2c_piix4 processor button ac i2c_core > power_supply shpchp ide_core intel_agp pci_hotplug agpgart mousedev evdev sg > ext3 jbd mbcache sd_mod mptspi mptscsih mptbase scsi_transport_spi ehci_hcd > uhci_hcd scsi_mod usbcore > [ 2322.813338] > [ 2322.817134] Pid: 3125, comm: klogd Tainted: G D (2.6.24-rc6 #4) > [ 2322.821416] EIP: 0060:[<c0199e6d>] EFLAGS: 00010246 CPU: 0 > [ 2322.828832] EIP is at end_buffer_async_write+0x6f/0xfd > [ 2322.833341] EAX: 00000000 EBX: df1d2268 ECX: df1d2268 EDX: 00000001 > [ 2322.839963] ESI: def45080 EDI: df77c0c0 EBP: c13a9d40 ESP: dee9be6c > [ 2322.845409] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 > [ 2322.851864] Process klogd (pid: 3125, ti=dee9a000 task=df474bc0 > task.ti=dee9a000) > [ 2322.859787] Stack: dfa61000 00000015 ffffffff e088db79 c0107a5c ffffffff > 00000202 00000200 > [ 2322.868770] e088db79 dfa61000 def45080 def45080 df77c0c0 00001000 > c01994fd c01994dc > [ 2322.877370] c019a99d 00001000 c01d919a 00000000 dee9bedc c02d8c44 > dee9bfa0 dee9bedc > [ 2322.887755] Call Trace: > [ 2322.889427] [<e088db79>] mptscsih_io_done+0x0/0xa52 [mptscsih] > [ 2322.896192] [<c0107a5c>] apic_timer_interrupt+0x28/0x30 > [ 2322.901439] [<e088db79>] mptscsih_io_done+0x0/0xa52 [mptscsih] > [ 2322.909389] [<c01994fd>] end_bio_bh_io_sync+0x21/0x29 > [ 2322.915672] [<c01994dc>] end_bio_bh_io_sync+0x0/0x29 > [ 2322.921404] [<c019a99d>] bio_endio+0x27/0x29 > [ 2322.928198] [<c01d919a>] __end_that_request_first+0x192/0x33d > [ 2322.933405] [<e0816a93>] scsi_end_request+0x1a/0xa8 [scsi_mod] > [ 2322.940634] [<e081761b>] scsi_io_completion+0x14c/0x2fb [scsi_mod] > [ 2322.947318] [<c01db7e1>] blk_done_softirq+0x5b/0x67 > [ 2322.953414] [<c012cfae>] __do_softirq+0x75/0xe1 > [ 2322.957435] [<c012d05f>] do_softirq+0x45/0x53 > [ 2322.962434] [<c012d2c3>] irq_exit+0x38/0x6b > [ 2322.966576] [<c0109843>] do_IRQ+0x5c/0x71 > [ 2322.971256] [<c012d2de>] irq_exit+0x53/0x6b > [ 2322.975864] [<c011a12a>] smp_apic_timer_interrupt+0x71/0x7d > [ 2322.981461] [<c010799f>] common_interrupt+0x23/0x28 > [ 2322.989075] ======================= > [ 2322.995502] Code: 24 16 7b 31 c0 e8 59 f4 f8 ff 8b 45 10 90 0f ba 68 3c 15 > 90 0f ba 2b 0b 90 0f ba 33 00 90 0f ba 6d 00 01 8b 45 00 f6 c4 08 75 04 <0f> > 0b eb fe 8b 75 0c 9c 58 0f 1f 84 00 00 00 00 00 89 c7 fa 0f > [ 2323.023538] EIP: [<c0199e6d>] end_buffer_async_write+0x6f/0xfd SS:ESP > 0068:dee9be6c > [ 2323.033481] Kernel panic - not syncing: Fatal exception in interrupt > > > > > [ 306.079477] CCID: Unregistered CCID 3 (ccid3) > [ 306.143890] BUG: unable to handle kernel paging request at virtual address > 40001864 > [ 306.152506] printing eip: c01792e1 *pde = 00000000 > [ 306.156682] Oops: 0000 [#1] SMP > [ 306.160469] Modules linked in: dccp_tfrc_lib dccp edd iptable_filter > ip_tables ip6table_filter ip6_tables x_tables ipv6 microcode firmware_class > fuse loop dm_mod ide_cd cdrom pata_acpi ata_piix ahci ata_generic libata > floppy parport_pc rtc_cmos parport pcnet32 rtc_core mii i2c_piix4 rtc_lib > i2c_core pcspkr piix generic ac thermal container ide_core power_supply > button shpchp intel_agp processor pci_hotplug agpgart mousedev evdev sg ext3 > jbd mbcache sd_mod mptspi mptscsih mptbase scsi_transport_spi uhci_hcd > ehci_hcd scsi_mod usbcore > [ 306.220412] > [ 306.222927] Pid: 136, comm: pdflush Not tainted (2.6.24-rc6 #4) > [ 306.228691] EIP: 0060:[<c01792e1>] EFLAGS: 00010002 CPU: 0 > [ 306.238499] EIP is at kmem_cache_alloc+0x5d/0xa6 > [ 306.242756] EAX: 00000000 EBX: 00000282 ECX: c03750a0 EDX: 40001864 > [ 306.248712] ESI: c1408314 EDI: 40001864 EBP: c03750a0 ESP: dead3d54 > [ 306.254538] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > [ 306.258526] Process pdflush (pid: 136, ti=dead2000 task=df49e5e0 > task.ti=dead2000) > [ 306.264717] Stack: c016094d c1408314 40001864 00011200 de5fb000 df446080 > de65e680 00000000 > [ 306.276685] 00011210 c016094d 00000010 00000000 00000003 de6bc378 > 00000003 de6bcde0 > [ 306.284594] 00000000 de65e680 00000000 00000000 c019acdf 00000000 > df402a20 00000010 > [ 306.296711] Call Trace: > [ 306.298976] [<c016094d>] mempool_alloc+0x24/0xc2 > [ 306.304602] [<c016094d>] mempool_alloc+0x24/0xc2 > [ 306.308722] [<c019acdf>] bio_alloc_bioset+0x8c/0xe6 > [ 306.314133] [<c019ad44>] bio_alloc+0xb/0x17 > [ 306.318609] [<c0197688>] submit_bh+0x6e/0xf8 > [ 306.324696] [<c0199265>] __block_write_full_page+0x222/0x30f > [ 306.330100] [<c019c810>] blkdev_get_block+0x0/0x43 > [ 306.334949] [<c0199420>] block_write_full_page+0xce/0xd6 > [ 306.340733] [<c019c810>] blkdev_get_block+0x0/0x43 > [ 306.348460] [<c0163588>] __writepage+0x8/0x21 > [ 306.352736] [<c0163a1e>] write_cache_pages+0x15b/0x273 > [ 306.362425] [<c0163580>] __writepage+0x0/0x21 > [ 306.369968] [<c0163b36>] generic_writepages+0x0/0x26 > [ 306.375911] [<c0163b55>] generic_writepages+0x1f/0x26 > [ 306.380734] [<c0163b7c>] do_writepages+0x20/0x30 > [ 306.386999] [<c019423b>] __writeback_single_inode+0x17c/0x2a0 > [ 306.394198] [<c012d2de>] irq_exit+0x53/0x6b > [ 306.398880] [<c011a12a>] smp_apic_timer_interrupt+0x71/0x7d > [ 306.403016] [<c0194650>] sync_sb_inodes+0x18a/0x240 > [ 306.410354] [<c01948a4>] writeback_inodes+0x5a/0x9c > [ 306.414853] [<c01643d1>] wb_kupdate+0x7c/0xde > [ 306.419014] [<c01648b8>] pdflush+0x130/0x1d0 > [ 306.424730] [<c0164355>] wb_kupdate+0x0/0xde > [ 306.430029] [<c0164788>] pdflush+0x0/0x1d0 > [ 306.435018] [<c01398bc>] kthread+0x38/0x60 > [ 306.439003] [<c0139884>] kthread+0x0/0x60 > [ 306.442884] [<c0107beb>] kernel_thread_helper+0x7/0x10 > [ 306.448467] ======================= > [ 306.451998] Code: 3e 85 ff 89 7c 24 08 75 1b 89 14 24 8b 54 24 0c 83 c9 ff > 89 e8 89 74 24 04 e8 2b fb ff ff 89 44 24 08 eb 0c 8b 54 24 08 8b 46 0c <8b> > 04 82 89 06 89 d8 50 9d 0f 1f 84 00 00 00 00 00 66 83 7c 24 > [ 306.478944] EIP: [<c01792e1>] kmem_cache_alloc+0x5d/0xa6 SS:ESP > 0068:dead3d54 > [ 306.486157] ---[ end trace 0170fd34e372695a ]--- > [ 306.511450] sd 0:0:0:0: [sda] Result: hostbyte=DID_OK > driverbyte=DRIVER_SENSE,SUGGEST_OK > [ 306.532261] sd 0:0:0:0: [sda] Sense Key : Hardware Error [current] > [ 306.551315] sd 0:0:0:0: [sda] Add. Sense: Data phase error > [ 306.563451] end_request: I/O error, dev sda, sector 4437024 > [ 306.575308] Buffer I/O error on device sda2, logical block 426108 > [ 306.587177] lost page write due to I/O error on sda2 > [ 306.596911] Buffer I/O error on device sda2, logical block 426109 > [ 306.608804] lost page write due to I/O error on sda2 > [ 306.617992] Buffer I/O error on device sda2, logical block 426110 > [ 306.628005] lost page write due to I/O error on sda2 > [ 306.636004] Buffer I/O error on device sda2, logical block 426111 > [ 306.644813] lost page write due to I/O error on sda2 > [ 306.652236] Buffer I/O error on device sda2, logical block 426112 > [ 306.662203] lost page write due to I/O error on sda2 > [ 306.671197] Buffer I/O error on device sda2, logical block 426113 > [ 306.679141] lost page write due to I/O error on sda2 > [ 306.699255] BUG: unable to handle kernel paging request at virtual address > 100d4a84 > [ 306.715348] printing eip: c0139945 *pde = 00000000 > [ 306.724664] Oops: 0000 [#2] SMP > [ 306.730582] Modules linked in: dccp_tfrc_lib dccp edd iptable_filter > ip_tables ip6table_filter ip6_tables x_tables ipv6 microcode firmware_class > fuse loop dm_mod ide_cd cdrom pata_acpi ata_piix ahci ata_generic libata > floppy parport_pc rtc_cmos parport pcnet32 rtc_core mii i2c_piix4 rtc_lib > i2c_core pcspkr piix generic ac thermal container ide_core power_supply > button shpchp intel_agp processor pci_hotplug agpgart mousedev evdev sg ext3 > jbd mbcache sd_mod mptspi mptscsih mptbase scsi_transport_spi uhci_hcd > ehci_hcd scsi_mod usbcore > [ 306.788046] > [ 306.788569] Pid: 136, comm: pdflush Tainted: G D (2.6.24-rc6 #4) > [ 306.800851] EIP: 0060:[<c0139945>] EFLAGS: 00010296 CPU: 0 > [ 306.806474] EIP is at __wake_up_bit+0x9/0x33 > [ 306.814710] EAX: 100d4a84 EBX: 100d4a80 ECX: 0000000c EDX: c13670e0 > [ 306.818605] ESI: df39a8f8 EDI: 00000202 EBP: c13670e0 ESP: dead3acc > [ 306.835065] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 > [ 306.837951] Process pdflush (pid: 136, ti=dead2000 task=df49e5e0 > task.ti=dead2000) > [ 306.844247] Stack: 00000202 c13670e0 c015e5c5 df39a8f8 c0199ee0 c0317b16 > dead3ae8 32616473 > [ 306.855168] 00000200 c0160924 00000000 df446000 de65ef80 df4e00c0 > 00004000 de65e200 > [ 306.864865] de65e200 df4e00c0 00003000 c01994fd c01994dc c019a99d > 00001000 c01d919a > [ 306.874768] Call Trace: > [ 306.876862] [<c015e5c5>] end_page_writeback+0x2f/0x3c > [ 306.883188] [<c0199ee0>] end_buffer_async_write+0xe2/0xfd > [ 306.892703] [<c0160924>] mempool_free+0x6a/0x6f > [ 306.896859] [<c01994fd>] end_bio_bh_io_sync+0x21/0x29 > [ 306.903132] [<c01994dc>] end_bio_bh_io_sync+0x0/0x29 > [ 306.908307] [<c019a99d>] bio_endio+0x27/0x29 > [ 306.912352] [<c01d919a>] __end_that_request_first+0x192/0x33d > [ 306.919035] [<e0816a93>] scsi_end_request+0x1a/0xa8 [scsi_mod] > [ 306.926526] [<e08177c2>] scsi_io_completion+0x2f3/0x2fb [scsi_mod] > [ 306.932877] [<c01db7e1>] blk_done_softirq+0x5b/0x67 > [ 306.938996] [<c012cfae>] __do_softirq+0x75/0xe1 > [ 306.944407] [<c012d05f>] do_softirq+0x45/0x53 > [ 306.948536] [<c012d2c3>] irq_exit+0x38/0x6b > [ 306.952574] [<c011a12a>] smp_apic_timer_interrupt+0x71/0x7d > [ 306.958088] [<c0107a5c>] apic_timer_interrupt+0x28/0x30 > [ 306.963199] [<c014ce77>] acct_collect+0x152/0x15b > [ 306.968109] [<c012b710>] do_exit+0x1b9/0x68c > [ 306.972841] [<c01292c0>] printk+0x1b/0x1f > [ 306.976869] [<c0108417>] die+0x21d/0x224 > [ 306.980899] [<c0120397>] do_page_fault+0x4b6/0x593 > [ 306.986648] [<c01d9793>] generic_make_request+0x3be/0x3ec > [ 306.991209] [<c01d9793>] generic_make_request+0x3be/0x3ec > [ 306.996429] [<c011fee1>] do_page_fault+0x0/0x593 > [ 307.000875] [<c02c2c3a>] error_code+0x72/0x78 > [ 307.004889] [<c01792e1>] kmem_cache_alloc+0x5d/0xa6 > [ 307.008678] [<c016094d>] mempool_alloc+0x24/0xc2 > [ 307.011091] [<c016094d>] mempool_alloc+0x24/0xc2 > [ 307.026957] [<c019acdf>] bio_alloc_bioset+0x8c/0xe6 > [ 307.032287] [<c019ad44>] bio_alloc+0xb/0x17 > [ 307.035254] [<c0197688>] submit_bh+0x6e/0xf8 > [ 307.040911] [<c0199265>] __block_write_full_page+0x222/0x30f > [ 307.048908] [<c019c810>] blkdev_get_block+0x0/0x43 > [ 307.055251] [<c0199420>] block_write_full_page+0xce/0xd6 > [ 307.062257] [<c019c810>] blkdev_get_block+0x0/0x43 > [ 307.067258] [<c0163588>] __writepage+0x8/0x21 > [ 307.072534] [<c0163a1e>] write_cache_pages+0x15b/0x273 > [ 307.076626] [<c0163580>] __writepage+0x0/0x21 > [ 307.078707] [<c0163b36>] generic_writepages+0x0/0x26 > [ 307.084487] [<c0163b55>] generic_writepages+0x1f/0x26 > [ 307.091273] [<c0163b7c>] do_writepages+0x20/0x30 > [ 307.096249] [<c019423b>] __writeback_single_inode+0x17c/0x2a0 > [ 307.102496] [<c012d2de>] irq_exit+0x53/0x6b > [ 307.107266] [<c011a12a>] smp_apic_timer_interrupt+0x71/0x7d > [ 307.112929] [<c0194650>] sync_sb_inodes+0x18a/0x240 > [ 307.119285] [<c01948a4>] writeback_inodes+0x5a/0x9c > [ 307.124927] [<c01643d1>] wb_kupdate+0x7c/0xde > [ 307.132149] [<c01648b8>] pdflush+0x130/0x1d0 > [ 307.136540] [<c0164355>] wb_kupdate+0x0/0xde > [ 307.140336] [<c0164788>] pdflush+0x0/0x1d0 > [ 307.144942] [<c01398bc>] kthread+0x38/0x60 > [ 307.150390] [<c0139884>] kthread+0x0/0x60 > [ 307.155285] [<c0107beb>] kernel_thread_helper+0x7/0x10 > [ 307.162728] ======================= > [ 307.164944] Code: c1 eb 1e 69 db 80 07 00 00 81 c3 80 49 35 c0 2b 8b 08 07 > 00 00 d3 e8 6b c0 0c 03 83 00 07 00 00 5b c3 53 89 c3 83 ec 0c 8d 40 04 <39> > 43 04 89 54 24 04 89 4c 24 08 74 18 8d 44 24 04 b9 01 00 00 > [ 307.188954] EIP: [<c0139945>] __wake_up_bit+0x9/0x33 SS:ESP 0068:dead3acc > [ 307.199560] Kernel panic - not syncing: Fatal exception in interrupt _______________________________________________________________________ Jetzt neu! 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