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Subject2.4.16 alpha scsi oops on large transfer
I've got a highly repeatable (3/3) kernel oops on large scsi transfers (eg,
copying a cdrom to the hd (actually, md0: raid 5 of sda to sdd*)). The
qlogicisp driver is obviously accessing a structure though a null pointer, and
it /looks/ like it's the Cmnd pointer:

if (sts->hdr.entry_type == ENTRY_STATUS)
->? Cmnd->result = isp1020_return_status(sts);
Cmnd->result = DID_ERROR << 16;

Again, I'm not subsribed to the list, so please CC any replies to me.


(NOTE: the oops was transcribed by hand (screen to paper, paper to file), but
seems accurate).

(* I've temporarily given up on the DAC960 for now: too many issues with
upgrading its firmware)

ksymoops 2.4.0 on alpha 2.4.16. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.16/ (default)
-m /boot/ (default)

Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.

Warning (compare_maps): ksyms_base symbol generic_direct_IO_R__ver_generic_direct_IO not found in Ignoring ksyms_base entry
Warning (compare_maps): mismatch on symbol partition_name , ksyms_base says fffffc0000997930, says fffffc000088aed0. Ignoring ksyms_base entry
Warning (compare_maps): ksyms_base symbol vm_max_readahead_R__ver_vm_max_readahead not found in Ignoring ksyms_base entry
Warning (compare_maps): ksyms_base symbol vm_min_readahead_R__ver_vm_min_readahead not found in Ignoring ksyms_base entry
Warning (compare_maps): mismatch on symbol scsi_CDs , sr_mod says fffffffc0031d668, /lib/modules/2.4.16/kernel/drivers/scsi/sr_mod.o says fffffffc00318000. Ignoring /lib/modules/2.4.16/kernel/drivers/scsi/sr_mod.o entry
Warning (compare_maps): mismatch on symbol usb_devfs_handle , usbcore says fffffffc002cf880, /lib/modules/2.4.16/kernel/drivers/usb/usbcore.o says fffffffc002cf900. Ignoring /lib/modules/2.4.16/kernel/drivers/usb/usbcore.o entry
Unable to handle kernel paging request at virtual address 0000000000000198
swapper(0): Oops 1
pc = [<fffffc0000957620>] ra = [<fffffc0000957430>] ps = 0007 Not tainted
Using defaults from ksymoops -t elf64-alpha -a alpha
v0 = 000000000000001e t0 = 00000000000300f0 t1 = 000000000a440013
t2 = 0000000000000000 t3 = 0000000000000015 t4 = 0000000000000000
t5 = 0000000000000000 t6 = 0000000000000000 t7 = fffffc0000ab0000
s0 = 0000000000000000 s1 = fffffc000fe724c0 s2 = 0000000000000005
s3 = fffffc000fe72400 s4 = fffffc0000b29428 s5 = 0000000000000005
s6 = 0000000000000000
a0 = fffffc000fe44100 a1 = fffffd0dfc0080c0 a2 = fffffc0000ab3ed8
a3 = 0000000000000000 a4 = 00000000000000ff a5 = 0000000000000000
t8 = 0000000000000000 t9 = 0000000000000103 t10= 000000000000000c
t11= 0000000000000000 pv = fffffc0000822800 at = 0000000000015f00
gp = fffffc0000b7eb38 sp = fffffc0000ab3df8
Trace:fffffc00009572ac fffffc000081fc44 fffffc0000816644 fffffc0000823b84 fffffc0000816c78 fffffc0000810e08 fffffc0000812570 fffffc00008280a0 fffffc0000812550 fffffc000086ebe4 fffffc00008100a4 fffffc000081001c
Code: a3300048 a390004c a0100050 a2b00054 a2900058 a270005c <b0290198> b049019c

>>PC; fffffc0000957620 <isp1020_intr_handler+350/4c0> <=====
Trace; fffffc00009572ac <do_isp1020_intr_handler+2c/50>
Trace; fffffc000081fc44 <lca_clock_print+4/e0>
Trace; fffffc0000816644 <handle_irq+134/1d0>
Trace; fffffc0000823b84 <dp264_srm_device_interrupt+34/50>
Trace; fffffc0000816c78 <do_entInt+d8/170>
Trace; fffffc0000810e08 <ret_from_sys_call+0/10>
Trace; fffffc0000812570 <cpu_idle+70/80>
Trace; fffffc00008280a0 <do_check_pgt_cache+0/140>
Trace; fffffc0000812550 <cpu_idle+50/80>
Trace; fffffc000086ebe4 <do_select+274/2e0>
Trace; fffffc00008100a4 <rest_init+44/60>
Trace; fffffc000081001c <_stext+1c/20>
Code; fffffc0000957608 <isp1020_intr_handler+338/4c0>
0000000000000000 <_PC>:
Code; fffffc0000957608 <isp1020_intr_handler+338/4c0>
0: 48 00 30 a3 ldl t11,72(a0)
Code; fffffc000095760c <isp1020_intr_handler+33c/4c0>
4: 4c 00 90 a3 ldl at,76(a0)
Code; fffffc0000957610 <isp1020_intr_handler+340/4c0>
8: 50 00 10 a0 ldl v0,80(a0)
Code; fffffc0000957614 <isp1020_intr_handler+344/4c0>
c: 54 00 b0 a2 ldl a5,84(a0)
Code; fffffc0000957618 <isp1020_intr_handler+348/4c0>
10: 58 00 90 a2 ldl a4,88(a0)
Code; fffffc000095761c <isp1020_intr_handler+34c/4c0>
14: 5c 00 70 a2 ldl a3,92(a0)
Code; fffffc0000957620 <isp1020_intr_handler+350/4c0> <=====
18: 98 01 29 b0 stl t0,408(s0) <=====
Code; fffffc0000957624 <isp1020_intr_handler+354/4c0>
1c: 9c 01 49 b0 stl t1,412(s0)

Kernel panic: Aiee, killing interrupt handler!

7 warnings issued. Results may not be reliable.
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