data abort when run 'dhcp'
qianfan
qianfanguijin at 163.com
Thu Mar 24 10:33:51 CET 2022
在 2022/3/23 18:12, Heinrich Schuchardt 写道:
> On 3/23/22 11:07, qianfan wrote:
>>
>> 在 2022/3/23 17:51, Heinrich Schuchardt 写道:
>>> On 3/23/22 10:13, qianfan wrote:
>>>>
>>>> 在 2022/3/23 16:02, qianfan 写道:
>>>>>
>>>>>
>>>>> 在 2022/3/23 15:45, qianfan 写道:
>>>>>>
>>>>>>
>>>>>> 在 2022/3/23 10:28, qianfan 写道:
>>>>>>>
>>>>>>> Hi:
>>>>>>>
>>>>>>> I had a custom AM335X board connected my computer by usbnet. It
>>>>>>> always report data abort when 'dhcp':
>>>>>>>
>>>>>>> Next it the log:
>>>>>>>
>>>>>>> U-Boot 2022.01-rc1-00183-gfa5b4e2d19-dirty (Feb 25 2022 - 15:45:02
>>>>>>> +0800)
>>>>>>>
>>>>>>> CPU : AM335X-GP rev 2.1
>>>>>>> Model: WISDOM AM335X CCT
>>>>>>> DRAM: 512 MiB
>>>>>>> NAND: 256 MiB
>>>>>>> MMC: OMAP SD/MMC: 0
>>>>>>> Loading Environment from NAND... *** Warning - bad CRC, using
>>>>>>> default environment
>>>>>>>
>>>>>>> Net: Could not get PHY for ethernet at 4a100000: addr 0
>>>>>>> eth2: ethernet at 4a100000, eth3: usb_ether
>>>>>>> Hit any key to stop autoboot: 0
>>>>>>> => setenv autoload no
>>>>>>> => dhcp
>>>>>>> using musb-hdrc, OUT ep1out IN ep1in STATUS ep2in
>>>>>>> MAC de:ad:be:ef:00:01
>>>>>>> HOST MAC de:ad:be:ef:00:00
>>>>>>> RNDIS ready
>>>>>>> musb-hdrc: peripheral reset irq lost!
>>>>>>> high speed config #2: 2 mA, Ethernet Gadget, using RNDIS
>>>>>>> USB RNDIS network up!
>>>>>>> BOOTP broadcast 1
>>>>>>> BOOTP broadcast 2
>>>>>>> BOOTP broadcast 3
>>>>>>> DHCP client bound to address 192.168.200.4 (757 ms)
>>>>>>> data abort
>>>>>>> pc : [<9fe9b0a2>] lr : [<9febbc3f>]
>>>>>>> reloc pc : [<808130a2>] lr : [<80833c3f>]
>>>>>>> sp : 9de53410 ip : 9de53578 fp : 00000001
>>>>>>> r10: 9de5345c r9 : 9de67e80 r8 : 9febbae5
>>>>>>> r7 : 9de72c30 r6 : 9feec710 r5 : 0000000d r4 : 00000018
>>>>>>> r3 : 3fdd8e04 r2 : 00000002 r1 : 9feec728 r0 : 9feec700
>>>>>>> Flags: Nzcv IRQs off FIQs on Mode SVC_32 (T)
>>>>>>> Code: f023 0303 60ca 4403 (6091) 685a
>>>>>>> Resetting CPU ...
>>>>>>>
>>>>>>> resetting ...
>>>>>>>
>>>>>>>
>>>>>>> It's there has any doc about how to debug data abort? Or is the bug
>>>>>>> is already fixed?
>>>>>>>
>>>>>>> Thanks
>>>>>>>
>>>>>> This bug doesn't fixed on master code. I found v2021.01 is good and
>>>>>> v2021.04-rc2 is bad.
>>>>>>
>>>>>> Also I had tested this on beaglebone black with am335x_evm_defconfig,
>>>>>> has the simliar problem.
>>>>>>
>>>>>> find the first bug commit via 'git bisect': it told me that commit
>>>>>> e97eb638de0dc8f6e989e20eaeb0342f103cb917 broke it. But it is very
>>>>>> strange due to this commit doesn't touch any dhcp or network code.
>>>>>>
>>>>>> ➜ u-boot-main git:(e97eb638de) ✗ git bisect bug
>>>>>> e97eb638de0dc8f6e989e20eaeb0342f103cb917 is the first bug commit
>>>>>> commit e97eb638de0dc8f6e989e20eaeb0342f103cb917
>>>>>> Author: Heinrich Schuchardt <xypron.glpk at gmx.de>
>>>>>> Date: Wed Jan 20 22:21:53 2021 +0100
>>>>>>
>>>>>> fs: fat: consistent error handling for flush_dir()
>>>>>>
>>>>>> Provide function description for flush_dir().
>>>>>> Move all error messages for flush_dir() from the callers to the
>>>>>> function.
>>>>>> Move mapping of errors to -EIO to the function.
>>>>>> Always check return value of flush_dir() (Coverity CID 316362).
>>>>>>
>>>>>> In fat_unlink() return -EIO if flush_dirty_fat_buffer() fails.
>>>>>>
>>>>>> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
>>>>>>
>>>>>> :040000 040000 2281a449f2d134078d7faa1ee735a367b55aad7e
>>>>>> 77d188b1c99181fd71f2167fdeee3434a09db209 M fs
>>>>>>
>>>>>>
>>>>>> 184aa6504143b452132e28cd3ebecc7b941cdfa1 is the first commit before
>>>>>> e97eb638de0dc8f6e989e20eaeb0342f103cb917:
>>>>>>
>>>>>> * e97eb638de0dc8f6e989e20eaeb0342f103cb917 fs: fat: consistent error
>>>>>> handling for flush_dir()
>>>>>> * 184aa6504143b452132e28cd3ebecc7b941cdfa1 Merge tag
>>>>>> 'u-boot-rockchip-20210121' of
>>>>>> https://gitlab.denx.de/u-boot/custodians/u-boot-rockchip
>>>>>> |\
>>>>>> | * 9ddc0787bd660214366e386ce689dd78299ac9d0 pci: Add Rockchip dwc
>>>>>> based PCIe controller driver
>>>>>>
>>>>>> I checked 184aa6504143b452132e28cd3ebecc7b941cdfa1 can work fine.
>>>>>>
>>>>>> U-Boot 2021.01-00688-g184aa65041-dirty (Mar 23 2022 - 15:07:56 +0800)
>>>>>>
>>>>>> CPU : AM335X-GP rev 2.1
>>>>>> Model: TI AM335x BeagleBone Black
>>>>>> DRAM: 512 MiB
>>>>>> WDT: Started with servicing (60s timeout)
>>>>>> NAND: 0 MiB
>>>>>> MMC: OMAP SD/MMC: 0, OMAP SD/MMC: 1
>>>>>> Loading Environment from FAT... <ethaddr> not set. Validating first
>>>>>> E-fuse MAC
>>>>>> Net: eth2: ethernet at 4a100000, eth3: usb_ether
>>>>>> Hit any key to stop autoboot: 0
>>>>>> => dhcp
>>>>>> ethernet at 4a100000 Waiting for PHY auto negotiation to
>>>>>> complete......... TIMEOUT !
>>>>>> using musb-hdrc, OUT ep1out IN ep1in STATUS ep2in
>>>>>> MAC de:ad:be:ef:00:01
>>>>>> HOST MAC de:ad:be:ef:00:00
>>>>>> RNDIS ready
>>>>>> musb-hdrc: peripheral reset irq lost!
>>>>>> high speed config #2: 2 mA, Ethernet Gadget, using RNDIS
>>>>>> USB RNDIS network up!
>>>>>> BOOTP broadcast 1
>>>>>> BOOTP broadcast 2
>>>>>> BOOTP broadcast 3
>>>>>> DHCP client bound to address 192.168.200.157 (757 ms)
>>>>>> Using usb_ether device
>>>>>> TFTP from server 192.168.200.1; our IP address is 192.168.200.157
>>>>>> Filename 'u-boot.img'.
>>>>>> Load address: 0x82000000
>>>>>> Loading:
>>>>>> #################################################################
>>>>>> #################################################################
>>>>>> #################################################################
>>>>>> #########################
>>>>>> 2.5 MiB/s
>>>>>> done
>>>>>> Bytes transferred = 1123888 (112630 hex)
>>>>>> =>
>>>>>>
>>>> "data abort" messages:
>>>>
>>>> data abort
>>>> pc : [<9ff8196c>] lr : [<9ffa1cd7>]
>>>> reloc pc : [<8081496c>] lr : [<80834cd7>]
>>>> sp : 9df38e60 ip : 9df38fc8 fp : 00000001
>>>> r10: 9df38eac r9 : 9df4ceb0 r8 : 9ffa1b7d
>>>> r7 : 9df52fd0 r6 : 9ffdbba8 r5 : 0000000d r4 : 00000018
>>>> r3 : 3ff589e0 r2 : 9ffafa11 r1 : 9ffdbbc0 r0 : 9ffdbb00
>>>> Flags: Nzcv IRQs off FIQs on Mode SVC_32 (T)
>>>> Code: 0303 60ca 4403 6091 (685a) f042
>>>> Resetting CPU ...
>>>>
>>>> objdump u-boot:pc is in malloc and lr is in env_attr_walk
>>>>
>>>> unlink(victim, bck, fwd);
>>>> 80814966: 60ca str r2, [r1, #12]
>>>> set_inuse_bit_at_offset(victim, victim_size);
>>>> 80814968: 4403 add r3, r0
>>>> unlink(victim, bck, fwd);
>>>> 8081496a: 6091 str r1, [r2, #8]
>>>> set_inuse_bit_at_offset(victim, victim_size);
>>>> 8081496c: 685a ldr r2, [r3, #4]
>>>> 8081496e: f042 0201 orr.w r2, r2, #1
>>>> 80814972: 605a str r2, [r3, #4]
>>>>
>>>> r3 is 3ff589e0 and it's not a valid ram address on am335x.
>>>>
>>>>
>>>
>>> I have seen crashes in common/dlmalloc.c before after double free() or
>>> free() with an incorrect pointer.
>>>
>>> The assert() statements in do_check_inuse_chunk() are meant to catch
>>> this but assert() as defined in include/log.h does not stop the code and
>>> even does not print without _DEBUG=1.
>>>
>>> You should be able to get the assert output with
>>>
>>> #include <common.h>
>>> #define _DEBUG 1
>>> #include <log.h>
>>>
>>> at the top of common/dlmalloc.c.
>>>
>>> You should get full malloc debug output with
>>
>> Hi: I had try add DEBUG marco before <log.h> and no other malloc message
>
> assert() checks for _DEBUG. Defining DEBUG after common.h will not
> define _DEBUG.
Finally I got a malloc error message on console:
TFTP from server 192.168.200.1; our IP address is 192.168.200.39
Filename 'u-boot.img'.
Load address: 0x82000000
Loading: #################################################################
#################################################################
#################################################################
###################################################### 0 Bytes
1.9 MiB/s
done
Bytes transferred = 1274816 (1373c0 hex)
common/dlmalloc.c:819: do_check_chunk: Assertion `(char*)p + sz <= (char*)top'
failed.
I had tried many times, do_check_chunk not always failed, and sometimes it
report common/dlmalloc.c:802: do_check_chunk: Assertion `!chunk_is_mmapped(p)'
failed. The situation is not the same.
I got a bt stack when malloc failed:
(gdb) bt
#0 0x9ffb5684 in panic_finish () at lib/panic.c:23
#1 panic (fmt=0x9ffbd96b "%s:%u: %s: Assertion `%s' failed.") at lib/panic.c:49
#2 0x9ffb5696 in __assert_fail (assertion=<optimized out>, file=<optimized
out>, line=<optimized out>, function=<optimized out>) at lib/panic.c:56
#3 0x9ff76910 in do_check_inuse_chunk (p=p at entry=0x9ffd7200) at
common/dlmalloc.c:866
#4 0x9ff769d6 in do_check_malloced_chunk (p=p at entry=0x9ffd7200, s=s at entry=24)
at common/dlmalloc.c:900
#5 0x9ff76da6 in malloc (bytes=<optimized out>) at common/dlmalloc.c:1552
#6 0x9ff96b72 in env_attr_walk (attr_list=<optimized out>, callback=0x9ff969f9
<regex_callback>, priv=0x9df28dc8) at env/attr.c:70
#7 0x9ff96bc2 in env_attr_lookup (attr_list=<optimized out>, name=<optimized
out>, attributes=0x9df28dec "") at env/attr.c:184
#8 0x9ff97146 in env_callback_init (var_entry=0x9df46f60) at env/callback.c:67
#9 0x9ffb36fc in hsearch_r (item=..., action=ENV_ENTER, retval=0x9df28f60,
htab=0x9ffdbce8, flag=512) at lib/hashtable.c:403
#10 0x9ff7090e in _do_env_set (argc=<optimized out>, argv=<optimized out>,
env_flag=512, flag=0) at cmd/nvedit.c:296
#11 0x9ff70b64 in env_set (varname=<optimized out>, varvalue=<optimized out>) at
cmd/nvedit.c:318
#12 0x9ff6d522 in netboot_update_env () at cmd/net.c:133
#13 netboot_common (proto=DHCP, cmdtp=0x9ffdd0e8, argc=<optimized out>,
argv=0x9df442c8) at cmd/net.c:268
#14 0x9ff783a4 in cmd_call (repeatable=0x9df29008, argv=0x9df442c8, argc=1,
flag=0, cmdtp=0x9ffdd0e8) at common/command.c:580
#15 cmd_process (flag=<optimized out>, argc=1, argv=0x9df442c8,
repeatable=0x9ffdf6a0, ticks=0x0) at common/command.c:635
#16 0x9ff71d16 in run_pipe_real (pi=0x9df44220) at common/cli_hush.c:1676
#17 run_list_real (pi=<optimized out>) at common/cli_hush.c:1873
#18 0x9ff71e28 in run_list (pi=0x9df44220) at common/cli_hush.c:2022
#19 parse_stream_outer (inp=inp at entry=0x9df290e8, flag=flag at entry=2) at
common/cli_hush.c:3206
#20 0x9ff721ba in parse_file_outer () at common/cli_hush.c:3289
#21 0x9ff77c1a in cli_loop () at common/cli.c:229
#22 0x9ff70d3e in main_loop () at common/main.c:66
#23 0x9ff72672 in run_main_loop () at common/board_r.c:584
#24 0x9ff72830 in initcall_run_list (init_sequence=0x9ffd7224) at
include/initcall.h:46
#25 board_init_r (new_gd=<optimized out>, dest_addr=<optimized out>) at
common/board_r.c:822
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
>
> Best regards
>
> Heinrich
>
>> printed.
>>
>>>
>>> #define DEBUG 1
>>> #include <common.h>
>>> #include <log.h>
>>>
>>> Best regards
>>>
>>> Heinrich
>>
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