Hi Stephen,
Kernel bug is hit while booting up the next-20080320 kernel with MPT Fusion driver built in.
[ 61.614030] BUG: unable to handle kernel NULL pointer dereference at 00000528
[ 61.617012] IP: [<f881ccc9>] :mptspi:mptspi_dv_renegotiate_work+0xc/0xab
[ 61.619012] *pde = 00000000
[ 61.621015] Oops: 0000 [#1] SMP
[ 61.622004] last sysfs file: /sys/block/ram15/dev
[ 61.622004] Modules linked in: mptspi(+) mptscsih mptbase scsi_transport_spi sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
[ 61.622004]
[ 61.622004] Pid: 18, comm: events/3 Not tainted (2.6.25-rc6-next-20080320-autotest #1)
[ 61.622004] EIP: 0060:[<f881ccc9>] EFLAGS: 00010282 CPU: 3
[ 61.622004] EIP is at mptspi_dv_renegotiate_work+0xc/0xab [mptspi]
[ 61.622004] EAX: f7ae5c30 EBX: f7ae5c34 ECX: f78c510c EDX: 00000001
[ 61.622004] ESI: f7867da0 EDI: 00000528 EBP: f78a3f78 ESP: f78a3f58
[ 61.622004] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 61.622004] Process events/3 (pid: 18, ti=f78a3000 task=f78c4a20 task.ti=f78a3000)
[ 61.622004] Stack: 00000000 00000002 00000000 c0430b71 f78a3f90 f7ae5c34 f7867da0 f7ae5c30
[ 61.622004] f78a3fac c0430bac 00000000 00000002 c0430b71 f881ccbd f8821588 c08ed870
[ 61.622004] f881d870 00000003 f7867da0 c0431436 f7867dc8 f78a3fd0 c04314ea 00000000
[ 61.622004] Call Trace:
[ 61.622004] [<c0430b71>] ? run_workqueue+0x80/0x186
[ 61.622004] [<c0430bac>] ? run_workqueue+0xbb/0x186
[ 61.622004] [<c0430b71>] ? run_workqueue+0x80/0x186
[ 61.622004] [<f881ccbd>] ? mptspi_dv_renegotiate_work+0x0/0xab [mptspi]
[ 61.622004] [<c0431436>] ? worker_thread+0x0/0xbf
[ 61.622004] [<c04314ea>] ? worker_thread+0xb4/0xbf
[ 61.622004] [<c0433969>] ? autoremove_wake_function+0x0/0x33
[ 61.622004] [<c04338a7>] ? kthread+0x3b/0x64
[ 61.622004] [<c043386c>] ? kthread+0x0/0x64
[ 61.622004] [<c040468f>] ? kernel_thread_helper+0x7/0x10
[ 61.622004] =======================
[ 61.622004] Code: ff 8b 87 8c 00 00 00 e8 b0 5c 03 00 8b 87 8c 00 00 00 e8 6e f8 ff ff 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 57 56 53 83 ec 14 8b 78 20 <8b> 17 89 55 e0 e8 b3 2a c5 c7 8b 55 e0 66 83 bf b2 02 00 00 00
[ 61.622004] EIP: [<f881ccc9>] mptspi_dv_renegotiate_work+0xc/0xab [mptspi] SS:ESP 0068:f78a3f58
[ 61.622018] ---[ end trace 9ed01624c6eca9b7 ]---
[ 49.418416] mptbase: ioc0: Initiating recovery
[ 49.419412] mptbase: ioc0: WARNING - IOC is in FAULT state!!!
[ 49.420412] mptbase: ioc0: WARNING - FAULT code = 8112h
[ 54.425032] mptbase: ioc0: ERROR - Doorbell ACK timeout (count=4999), IntStatus=80000009!
[ 71.669211] mptbase: ioc0: Recovered from IOC FAULT
[ 94.148187] BUG: unable to handle kernel NULL pointer dereference at 00000528
[ 94.150190] IP: [<f881ccc9>] :mptspi:mptspi_dv_renegotiate_work+0xc/0xab
[ 94.152191] *pde = 00000000
[ 94.154191] Oops: 0000 [#2] SMP
[ 94.155186] last sysfs file: /sys/block/ram15/dev
[ 94.155186] Modules linked in: mptspi(+) mptscsih mptbase scsi_transport_spi sd_mod scsi_mod ext3 jbd ehci_hcd ohci_hcd uhci_hcd
[ 94.155186]
[ 94.155186] Pid: 17, comm: events/2 Tainted: G D (2.6.25-rc6-next-20080320-autotest #1)
[ 94.155186] EIP: 0060:[<f881ccc9>] EFLAGS: 00010282 CPU: 2
[ 94.155186] EIP is at mptspi_dv_renegotiate_work+0xc/0xab [mptspi]
[ 94.155186] EAX: f73231e0 EBX: f73231e4 ECX: 00000000 EDX: 00000000
[ 94.155186] ESI: f7867e38 EDI: 00000528 EBP: f78a2f78 ESP: f78a2f58
[ 94.155186] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[ 94.155186] Process events/2 (pid: 17, ti=f78a2000 task=f78c29a0 task.ti=f78a2000)
[ 94.155186] Stack: 00000000 00000002 00000000 c0430b71 f78a2f90 f73231e4 f7867e38 f73231e0
[ 94.155186] f78a2fac c0430bac 00000000 00000002 c0430b71 f881ccbd 5a5a5a5a 5a5a5a5a
[ 94.155186] 5a5a5a5a 5a5a5a5a f7867e38 c0431436 f7867e60 f78a2fd0 c04314ea 00000000
[ 94.155186] Call Trace:
[ 94.155186] [<c0430b71>] ? run_workqueue+0x80/0x186
[ 94.155186] [<c0430bac>] ? run_workqueue+0xbb/0x186
[ 94.155186] [<c0430b71>] ? run_workqueue+0x80/0x186
[ 94.155186] [<f881ccbd>] ? mptspi_dv_renegotiate_work+0x0/0xab [mptspi]
[ 94.155186] [<c0431436>] ? worker_thread+0x0/0xbf
[ 94.155187] [<c04314ea>] ? worker_thread+0xb4/0xbf
[ 94.155187] [<c0433969>] ? autoremove_wake_function+0x0/0x33
[ 94.155187] [<c04338a7>] ? kthread+0x3b/0x64
[ 94.155187] [<c043386c>] ? kthread+0x0/0x64
[ 94.155187] [<c040468f>] ? kernel_thread_helper+0x7/0x10
[ 94.155187] =======================
[ 94.155187] Code: ff 8b 87 8c 00 00 00 e8 b0 5c 03 00 8b 87 8c 00 00 00 e8 6e f8 ff ff 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 57 56 53 83 ec 14 8b 78 20 <8b> 17 89 55 e0 e8 b3 2a c5 c7 8b 55 e0 66 83 bf b2 02 00 00 00
[ 94.155187] EIP: [<f881ccc9>] mptspi_dv_renegotiate_work+0xc/0xab [mptspi] SS:ESP 0068:f78a2f58
[ 94.155198] ---[ end trace 9ed01624c6eca9b7 ]---
The .config options related to fusion mpt driver
CONFIG_FUSION=y
CONFIG_FUSION_SPI=m
CONFIG_FUSION_FC=m
CONFIG_FUSION_SAS=m
CONFIG_FUSION_MAX_SGE=40
CONFIG_FUSION_CTL=m
CONFIG_FUSION_LAN=m
# CONFIG_FUSION_LOGGING is not set
(gdb) p mptspi_dv_renegotiate_work
$1 = {void (struct work_struct *)} 0xcbd <mptspi_dv_renegotiate_work>
(gdb) p/x 0xcbd+0xc
$2 = 0xcc9
(gdb) l *0xcc9
0xcc9 is in mptspi_dv_renegotiate_work (drivers/message/fusion/mptspi.c:1228).
1223 struct _MPT_SCSI_HOST *hd = wqw->hd;
1224 struct scsi_device *sdev;
1225 struct scsi_target *starget;
1226 struct _CONFIG_PAGE_SCSI_DEVICE_1 pg1;
1227 u32 nego;
1228 MPT_ADAPTER *ioc = hd->ioc;
1229
1230 kfree(wqw);
1231
1232 if (hd->spi_pending) {
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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