On Sun, Oct 20, 2013 at 11:37 AM, Ingo Jürgensmann
<ij@xxxxxxxxxxxxxxxxxx> wrote:
I'm testing the ESP SCSI driver port by Tuomas and Michael to 3.12-rc4 and
got now this kernel panic during heavy disk activity (apt-get dist-upgrade
and parallel a rsync backup by BackupPC):
Debian GNU/Linux jessie/sid spice ttyS0
spice login: [77568.070000] *** ZERO DIVIDE *** FORMAT=2
[77568.080000] Current process id is 0
[77568.090000] BAD KERNEL TRAP: 00000000
[77568.100000] Modules linked in: xt_multiport iptable_filter ip_tables
x_tables ipv6 8390 loop evdev dmasound_paula mac_hid dmasound_core
parport_amiga soundcore parport amimouse ext3 mbcache jbd dm_mod nbd sg
sd_mod zorro7xx 53c700 hydra amiflop a3000
[77568.320000] PC: [<0484c33a>] sd_completed_bytes+0x90/0xe8 [sd_mod]
[77568.330000] SR: 2000 SP: 00277e58 a2: 0027e2e4
[77568.340000] d0: 00000000 d1: 007735a0 d2: 00000000 d3: 00000001
[77568.350000] d4: 00000000 d5: 007735a8 a0: 024dd000 a1: 024a0ea0
[77568.360000] Process swapper (pid: 0, task=0027e2e4)
[77568.370000] Frame format=2 instr addr=0484c336
[77568.390000] Stack from 00277e90:
00000000 08100002 00000000 00000001 00200028 00000004 0249d120
02be3090
0272c9e0 00000000 007735a0 00277f04 0484c5f8 0249d120 00277f30
0000000a
00276000 00000100 00200000 00000004 0249d120 00001000 02460614
002b9480
00002002 00000bb8 0249d100 70040200 00000000 024dd400 0013f838
0249d120
00277f30 002b9480 00276000 001d38e2 000e1cec 0249d120 00000001
00276000
00277f30 00277f30 0002c8da 002b9480 00272704 0000000f 00002598
08031470
[77568.950000] Call Trace: [<0484c5f8>] sd_done+0x1d6/0x2aa [sd_mod]
My first guess was that commit ea077b1b96e073eac5c3c5590529e964767fc5f7
("m68k: Truncate base in do_div()") was missing, but this is 3.12-rc4, so it
should be included.
BIG FAT WARNING for Thorsten: 3.10.7 does _not_ have this fix!
It was only backported ase5a16a446ef5bdb37214b100b93e59ac75e8a445 in
3.10.8.
[77569.190000] Code: 4a80 6704 4c42 0001 2c01 2207 4c42 1406 <2c00> 2e01 2004 2204 6704 4c42 0001 2801 2205 4c42 1404 2800 2a01 202e fff8 222e
However, the addresses and the code above don't match the kernel image in
linux-3.12.0-rc4-amiga-m68k.tar.gz?
Can we get the image somewhere?
Apart from that, since the division is:
/* be careful ... don't want any overflows */
u64 factor = scmd->device->sector_size / 512;
do_div(start_lba, factor);
do_div(end_lba, factor);
(yes, the "u64 factor" is the issue without Andreas's fix), it could still be
an ESP bug, if scmd->device->sector_size turns out to be less than 512
(e.g. 0).
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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