Florian Lohoff wrote:
Hi,
i just discovered that my native gcc build on one of my Indys stopped. I
found this in the dmesg ;)
Its a 2.6.24-rc2 on an R5k Indy 64M:
Kernel bug detected[#1]:
Cpu 0
$ 0 : 0000000000000000 ffffffff9000cce0 0000000000000001 ffffffff80000000
$ 4 : ffffffff8921f910 000000007fda0f05 000000007fda0f05 ffffffff8b8ea000
$ 8 : ffffffff89b4ef05 000000000000000e ffffffff8921f910 0000000000000f05
$12 : 0000000000000000 ffffffff80000008 ffffffff88090010 00000000004038b4
$16 : ffffffff8921f910 000000007fda0f05 ffffffff8b8ea000 000000000000000e
$20 : ffffffff8bdfb920 0000000000000000 ffffffff8bd88cc0 ffffffff8893fd58
$24 : 0000000000000006 ffffffff8801df00
$28 : ffffffff8893c000 ffffffff8893fd20 ffffffff88430000 ffffffff8801c010
Hi : 000000000001d1ea
Lo : 0000000000009b4e
epc : ffffffff8801bcf0 kmap_coherent+0x10/0x130 Not tainted
ra : ffffffff8801c010 copy_from_user_page+0x40/0xb0
Status: 9000cce3 KX SX UX KERNEL EXL IE
Cause : 00000034
PrId : 00002321 (R5000)
Modules linked in: dm_snapshot dm_mirror dm_mod ipv6
Process cat (pid: 14553, threadinfo=ffffffff8893c000, task=ffffffff88a52660)
Stack : 000000000000000e 000000007fda0f05 ffffffff8b8ea000 0000000000000000
ffffffff88079d10 ffffffff88079cc4 ffffffff8bfbd528 ffffffff8921f910
ffffffff8bdfb980 ffffffff8b8ea000 ffffffff8bdfb920 0000000000000000
ffffffff8b8ea000 000000000000000e ffffffff8bd88cc0 ffffffff8893fe78
0000000000447000 000000000052c7d8 0000000000000000 ffffffff880d9014
ffffffff8bd88cc0 ffffffff8b8ea000 fffffffffffffff4 ffffffff8b863248
0000000000000400 ffffffff8893fe78 0000000000447000 ffffffff880db188
ffffffff8be6f6e0 0000000000000400 0000000000447000 ffffffff8893fe78
0000000000447000 0000000000000003 0000000000000016 ffffffff8808fbdc
ffffffff8be6f6e0 0000000000000400 0000000000447000 fffffffffffffff7
...
Call Trace:
[<ffffffff8801bcf0>] kmap_coherent+0x10/0x130
[<ffffffff8801c010>] copy_from_user_page+0x40/0xb0
[<ffffffff88079d10>] access_process_vm+0x168/0x1d8
[<ffffffff880d9014>] proc_pid_cmdline+0xac/0x140
[<ffffffff880db188>] proc_info_read+0x108/0x150
[<ffffffff8808fbdc>] vfs_read+0xec/0x178
[<ffffffff88090060>] sys_read+0x50/0x98
[<ffffffff88019718>] handle_sys+0x118/0x134
Code: 0002127a 00021000 30420001 <00028036> 8f820024 3c038843 24420001 af820024 dc62f390
FWIW I get something very similar reading /proc/1/cmdline on
2.6.23-1/ip32 w/ R5000 and there have been other similar postings here
recently.
Maybe one day I will look into it, but it probably will not be real soon...
David Daney
