8xx 2.6.10-rc3 console_init()->con_init()->__alloc_bootmem() causes "Oops: kernel access of bad area"

From: Povolotsky, Alexander
Date: Tue Jan 25 2005 - 09:32:36 EST

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I booting kernel on 8xx 2.6.10-rc3
while trying to debug non-working console,
I moved console_init() call way down in __init start_kernel()
and put indefinite while loop right after it -
is it legtimate thing to do ?

Then I got soft reboot and was able to examine the content of the log buffer
in the bootloader.
I see that in a trace (function call sequence):

console_init()->con_init()->__alloc_bootmem()

I am getting "Oops: kernel access of bad area"

I am looking for advise,
Thanks,
Alex
******************************************************
...........
lock_kernel();
page_address_init();
printk(linux_banner);
setup_arch(&command_line);
setup_per_cpu_areas();

/*
* Mark the boot cpu "online" so that it can call console drivers in
* printk() and can access its per-cpu storage.
*/
smp_prepare_boot_cpu();

/*
* Set up the scheduler prior starting any interrupts (such as the
* timer interrupt). Full topology setup happens at smp_init()
* time - but meanwhile we still have a functioning scheduler.
*/
sched_init();
build_all_zonelists();
page_alloc_init();
printk("Kernel command line: %s\n", saved_command_line);
parse_early_param();
parse_args("Booting kernel", command_line, __start___param,
__stop___param - __start___param,
&unknown_bootoption);
sort_main_extable();
trap_init();
rcu_init();
init_IRQ();
pidhash_init();
init_timers();
softirq_init();
time_init();
/*
* HACK ALERT! This is early. We're ena bling the console before
* we've done PCI setups etc, and console_init() must be aware of
* this. But we do want output early, in case something goes wrong.
*/
/* console_init(); */
<<========================================================
if (panic_later)
panic(panic_later, panic_param);
profile_init();
local_irq_enable();
#ifdef CONFIG_BLK_DEV_INITRDa
if (initrd_start && !initrd_below_start_ok &&
initrd_start < min_low_pfn << PAGE_SHIFT) {
printk(KERN_CRIT "initrd overwritten (0x%08lx < 0x%08lx) - "
"disabling it.\n",initrd_start,min_low_pfn <<
PAGE_SHIFT);
initrd_start = 0;
}
#endif
vfs_caches_init_early();
mem_init();
kmem_cache_init();
console_init();
<<========================================================
while (1);
<<========================================================
numa_policy_init();
if (late_time_init)
late_time_init();
calibrate_delay();
pidmap_init();
pgtable_cache_init();
prio_tree_init();
anon_vma_init();
#ifdef CONFIG_X86
......

******************* ******************

grep log_buf System.map
c0197a28 d log_buf
c0197a2c d log_buf_len
c01c6464 t log_buf_len_setup
c01d03a0 t __setup_str_log_buf_len_setup
c01d08f0 t __setup_log_buf_len_setup
c01d4a9c b __log_buf
*******************************
R 0c01d4a9c b __log_buf <4>Linux
version
1d4aac | 20 32 2e 36 2e 31 30 2d 72 63 33 20 28 61 70 6f | 2.6.10-rc3
(apo
1d4abc | 76 6f 6c 6f 74 40 6c 6f 63 61 6c 68 6f 73 74 2e |
volot@localhost.
1d4acc | 6c 6f 63 61 6c 64 6f 6d 61 69 6e 29 20 28 67 63 | localdomain)
(gc
1d4adc | 63 20 76 65 72 73 69 6f 6e 20 33 2e 34 2e 31 29 | c version
3.4.1)
1d4aec | 20 23 38 36 20 4d 6f 6e 20 4a 61 6e 20 32 34 20 | #86 Mon Jan
24
1d4afc | 31 39 3a 35 38 3a 33 31 20 45 53 54 20 32 30 30 | 19:58:31 EST
200
1d4b0c | 35 0a 3c 37 3e 4f 6e 20 6e 6f 64 65 20 30 20 74 | 5.<7>On node 0
t
1d4b1c | 6f 74 61 6c 70 61 67 65 73 3a 20 38 31 39 32 0a | otalpages:
8192.
1d4b2c | 3c 37 3e 20 20 44 4d 41 20 7a 6f 6e 65 3a 20 38 | <7> DMA zone:
81
1d4b2d - 1d4b3c - same lines as above
1d4b3d | 39 32 20 70 61 67 65 73 2c 20 4c 49 46 4f 20 62 | 92 pages, LIFO
b
1d4b4d | 61 74 63 68 3a 32 0a 3c 37 3e 20 20 4e 6f 72 6d | atch:2.<7>
Norm
1d4b5d | 61 6c 20 7a 6f 6e 65 3a 20 30 20 70 61 67 65 73 | al zone: 0
pages
1d4b6d | 2c 20 4c 49 46 4f 20 62 61 74 63 68 3a 31 0a 3c | , LIFO
batch:1.<
1d4b7d | 37 3e 20 20 48 69 67 68 4d 65 6d 20 7a 6f 6e 65 | 7> HighMem
zone
1d4b8d | 3a 20 30 20 70 61 67 65 73 2c 20 4c 49 46 4f 20 | : 0 pages,
LIFO
1d4b3d | 62 61 74 63 68 3a 31 0a 3c 34 3e 42 75 69 6c 74 |
batch:1.<4>Built
1d4b3e - 1d4bbb SAME LINES AS ABOV

1
zonelists.<4>
1d4bbd | 4b 65 72 6e 65 6c 20 63 6f 6d 6d 61 6e 64 20 6c | Kernel command
li
1d4bce | 6e 65 3a 20 63 6f 6e 73 6f 6c 65 3d 74 74 79 43 | ne:
console=ttyC
1d4bde | 50 4d 30 2c 31 31 35 32 30 30 20 70 61 6e 69 63 | PM0,115200
panic
1d4bee | 3d 33 20 72 6f 6f 74 3d 2f 64 65 76 2f 72 61 6d | =3
root=/dev/ram
1d4bfe | 0a 3c 34 3e 50 49 44 20 68 61 73 68 20 74 61 62 | .<4>PID hash
tab
1d4c0e | 6c 65 20 65 6e 74 72 69 65 73 3a 20 32 35 36 20 | le entries:
256
1d4c1e | 28 6f 72 64 65 72 3a 20 38 2c 20 34 30 39 36 20 | (order: 8,
4096
1d4c2e | 62 79 74 65 73 29 0a 3c 34 3e 44 65 63 72 65 6d |
bytes).<4>Decrem
1d4c3e | 65 6e 74 65 72 20 46 72 65 71 75 65 6e 63 79 20 | enter
Frequency
1d4c4e | 3d 20 31 38 37 35 30 30 30 30 30 2f 36 30 0a 3c | =
187500000/60.<5
1d4c5f | 3e 6d 38 78 78 5f 77 64 74 3a 20 77 64 74 20 64 | >m8xx_wdt: wdt
d
1d4c6f | 69 73 61 62 6c 65 64 20 28 53 59 50 43 52 3a 20 | isabled
(SYPCR:
1d4c7f | 30 78 34 43 34 42 46 46 38 31 29 0a 3c 34 3e 44 |
0x4C4BFF81).<4>D
1d4c8f | 65 6e 74 72 79 20 63 61 63 68 65 20 68 61 73 68 | entry cache
hash
1d4c9f | 20 74 61 62 6c 65 20 65 6e 74 72 69 65 73 3a 20 | table
entries:
1d4caf | 38 31 39 32 20 28 6f 72 64 65 72 3a 20 33 2c 20 | 8192 (order:
3,
1d4cbf | 33 32 37 36 38 20 62 79 74 65 73 29 0a 3c 34 3e | 32768
bytes).<4>
1d4ccf | 49 6e 6f 64 65 2d 63 61 63 68 65 20 68 61 73 68 | Inode-cache
hash
1d4cdf | 20 74 61 62 6c 65 20 65 6e 74 72 69 65 73 3a 20 | table
entries: 4
1d4cf0 | 30 39 36 20 28 6f 72 64 65 72 3a 20 32 2c 20 31 | 096 (order: 2,
1
1d4d00 | 36 33 38 34 20 62 79 74 65 73 29 0a 3c 34 3e 4d | 6384
bytes).<4>M
1d4d10 | 65 6d 6f 72 79 3a 20 33 30 34 36 34 6b 20 61 76 | emory: 30464k
av
1d4d20 | 61 69 6c 61 62 6c 65 20 28 31 34 34 34 6b 20 6b | ailable (1444k
k
1d4d30 | 65 72 6e 65 6c 20 63 6f 64 65 2c 20 34 30 38 6b | ernel code,
408k
1d4d40 | 20 64 61 74 61 2c 20 38 30 6b 20 69 6e 69 74 2c | data, 80k
init,
1d4d50 | 20 30 6b 20 68 69 67 68 6d 65 6d 29 0a 3c 34 3e | 0k
highmem).<4>
1d4d60 | 4f 6f 70 73 3a 20 6b 65 72 6e 65 6c 20 61 63 63 | Oops: kernel
acc <<======================
1d4d70 | 65 73 73 20 6f 66 20 62 61 64 20 61 72 65 61 2c | ess of bad
area,
1d4d81 | 73 69 67 3a 20 31 31 20 5b 23 31 5d 0a 3c 34 3e | sig: 11
[#1].<4>
1d4d91 | 4e 49 50 3a 20 43 30 31 43 37 36 41 43 20 4c 52 | NIP: C01C76AC
LR
1d4da1 | 3a 20 43 30 31 43 37 43 34 43 20 53 50 3a 20 43 | : C01C7C4C SP:
C
1d4db1 | 30 31 42 44 46 34 30 20 52 45 47 53 3a 20 63 30 | 01BDF40 REGS:
c0
1d4dc1 | 31 62 64 65 39 30 20 54 52 41 50 3a 20 30 33 30 | 1bde90 TRAP:
030
1d4dd1 | 30 20 20 20 20 4e 6f 74 20 74 61 69 6e 74 65 64 | 0 Not
tainted
1d4de1 | 0a 3c 34 3e 4d 53 52 3a 20 30 30 30 30 39 30 33 | .<4>MSR:
0000903
1d4df1 | 32 20 45 45 3a 20 31 20 50 52 3a 20 30 20 46 50 | 2 EE: 1 PR: 0
FP
1d4e01 | 3a 20 30 20 4d 45 3a 20 31 20 49 52 2f 44 52 3a | : 0 ME: 1
IR/DR:
1d4e12 | 31 31 0a 3c 34 3e 44 41 52 3a 20 30 30 30 30 30 | 11.<4>DAR:
00000
1d4e22 | 30 30 30 2c 20 44 53 49 53 52 3a 20 30 30 30 30 | 000, DSISR:
0000
1d4e32 | 30 30 30 41 0a 3c 34 3e 54 41 53 4b 20 3d 20 63 | 000A.<4>TASK =
c
1d4e42 | 30 31 39 36 39 32 30 5b 30 5d 20 27 73 77 61 70 | 0196920[0]
'swap
1d4e52 | 70 65 72 27 20 54 48 52 45 41 44 3a 20 63 30 31 | per' THREAD:
c01
1d4e62 | 62 63 30 30 30 4c 61 73 74 20 73 79 73 63 61 6c | bc000Last
syscal
1d4e72 | 6c 3a 20 30 20 0a 3c 36 3e 47 50 52 30 30 3a 20 | l: 0
.<6>GPR00:
1d4e82 | 30 30 30 30 30 30 30 30 20 43 30 31 42 44 46 34 | 00000000
C01BDF4
1d4e92 | 30 20 43 30 31 39 36 39 32 30 20 30 30 30 30 32 | 0 C0196920
00002
1d4ea3 | 30 30 20 30 30 30 30 30 30 30 30 20 30 30 30 30 | 00 00000000
0000
1d4eb3 | 30 30 30 30 20 30 30 30 30 30 30 30 30 20 30 30 | 0000 00000000
00
1d4ec3 | 30 30 30 30 30 30 20 0a 3c 36 3e 47 50 52 30 38 | 000000
.<6>GPR08
1d4ed3 | 3a 20 30 30 30 30 30 30 30 30 20 30 30 30 30 30 | : 00000000
00000
1d4ee3 | 30 30 30 20 30 30 30 30 30 30 30 30 20 30 30 30 | 000 00000000
000
1d4ef3 | 30 32 30 30 30 20 30 30 30 30 30 30 30 30 20 30 | 02000 00000000
0
1d4f03 | 30 30 31 32 41 35 43 20 30 38 30 30 30 30 30 31 | 0012A5C
08000001
1d4f13 | 20 30 30 30 30 30 30 32 30 20 0a 3c 36 3e 47 50 | 00000020
.<6>GP
1d4f23 | 52 31 36 3a 20 30 34 30 31 33 41 44 30 20 30 34 | R16: 04013AD0
040
1d4f34 | 31 32 32 41 30 20 32 30 30 30 30 30 30 30 20 32 | 122A0 20000000
2
1d4f44 | 30 30 30 30 38 30 30 20 32 30 30 30 30 38 30 38 | 0000800
20000808
1d4f54 | 20 30 30 30 32 30 30 30 30 20 32 30 30 30 30 30 | 00020000
200000
1d4f64 | 30 34 20 30 30 30 30 36 30 30 30 20 0a 3c 36 3e | 04 00006000
.<6>
1d4f74 | 47 50 52 32 34 3a 20 46 46 46 46 46 46 46 46 20 | GPR24:
FFFFFFFF
1d4f84 | 30 30 30 30 30 31 33 34 20 30 30 30 30 30 30 30 | 00000134
0000000
1d4f94 | 46 20 30 30 30 30 30 30 30 31 20 46 46 46 46 46 | F 00000001
FFFFF
1d4fa4 | 46 46 46 20 30 30 30 30 30 30 31 30 20 30 30 30 | FFF 00000010
000
1d4fb4 | 30 30 30 30 31 20 43 30 31 44 42 35 38 34 20 0a | 00001 C01DB584
.<
1d4fc5 | 34 3e 4e 49 50 20 5b 63 30 31 63 37 36 61 63 5d | 4>NIP
[c01c76ac]
1d4fd5 | 20 5f 5f 61 6c 6c 6f 63 5f 62 6f 6f 74 6d 65 6d |
__alloc_bootmem
1d4fe5 | 5f 63 6f 72 65 2b 30 78 31 30 38 2f 30 78 33 61 |
_core+0x108/0x3a
1d4ff5 | 30 0a 3c 34 3e 4c 52 20 5b 63 30 31 63 37 63 34 | 0.<4>LR
[c01c7c4
1d5005 | 63 5d 20 5f 5f 61 6c 6c 6f 63 5f 62 6f 6f 74 6d | c]
__alloc_bootm
1d5015 | 65 6d 2b 30 78 34 30 2f 30 78 38 34 0a 3c 34 3e |
em+0x40/0x84.<4>
1d5025 | 43 61 6c 6c 20 74 72 61 63 65 3a 0a 3c 34 3e 20 | Call
trace:.<4>
1d5035 | 5b 63 30 31 63 37 63 34 63 5d 20 5f 5f 61 6c 6c | [c01c7c4c]
__all
1d5045 | 6f 63 5f 62 6f 6f 74 6d 65 6d 2b 30 78 34 30 2f |
oc_bootmem+0x40/0
1d5056 | 78 38 34 0a 3c 34 3e 20 5b 63 30 31 63 62 38 33 | x84.<4>
[c01cb83
1d5066 | 34 5d 20 63 6f 6e 5f 69 6e 69 74 2b 30 78 64 30 | 4]
con_init+0xd0
1d5076 | 2f 30 78 32 61 34 0a 3c 34 3e 20 5b 63 30 31 63 | /0x2a4.<4>
[c01c
1d5086 | 61 64 64 38 5d 20 63 6f 6e 73 6f 6c 65 5f 69 6e | add8]
console_in
1d5096 | 69 74 2b 30 78 34 63 2f 30 78 36 38 0a 3c 34 3e |
it+0x4c/0x68.<4>
1d50a6 | 20 5b 63 30 31 62 65 37 32 63 5d 20 73 74 61 72 | [c01be72c]
star
1d50b6 | 74 5f 6b 65 72 6e 65 6c 2b 30 78 64 30 2f 30 78 |
t_kernel+0xd0/0x
1d50c6 | 65 30 0a 3c 34 3e 20 5b 63 30 30 30 32 30 35 30 | e0.<4>
[c0002050
1d50d6 | 5d 20 73 74 61 72 74 5f 68 65 72 65 2b 30 78 34 | ]
start_here+0x4c
1d50e7 | 2f 30 78 62 30 0a 3c 30 3e 4b 65 72 6e 65 6c 20 |
/0xb0.<0>Kernel <<======================
1d50f7 | 70 61 6e 69 63 20 2d 20 6e 6f 74 20 73 79 6e 63 | panic - not
sync
1d5107 | 69 6e 67 3a 20 41 74 74 65 6d 70 74 65 64 20 74 | ing: Attempted
t
1d5117 | 6f 20 6b 69 6c 6c 20 74 68 65 20 69 64 6c 65 20 | o kill the
idle
1d5127 | 74 61 73 6b 21 0a 3c 34 3e 20 3c 30 3e 52 65 62 | task!.<4>
<0>Reb
1d5137 | 6f 6f 74 69 6e 67 20 69 6e 20 33 20 73 65 63 6f | ooting in 3
seco
1d5147 | 6e 64 73 2e 2e 00 00 00 00 00 00 00 00 00 00 00 |
nds.............
1d5157 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
................
1d5167 | 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
................
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Next message: Zwane Mwaikambo: "Re: 2.6.11-rc2-mm1 kernel BUG at kernel/workqueue.c:104"
Previous message: Christoph Hellwig: "Re: [PATCH] Avoiding fragmentation through different allocator"
Next in thread: Marcelo Tosatti: "Re: 8xx 2.6.10-rc3 console_init()->con_init()->__alloc_bootmem() caus es "Oops: kernel access of bad area""
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]