linux - 内核初始化期间崩溃(模块 insmod)

Question

我正在使用 Monta-Vista Linux 2.6.10。在内核初始化期间，在使用“insmod”注册我的模块时，在重新启动 7,000 次后发生以下内核转储。

DMY Touch Panel Filter Driver Version Ver.1.0.0 Major=200
usbdmy_init
DMY USB-Driver Ver.1.0.5
usbdmy_probe vendor=$afa product=$3e8
usbdmy_probe: endpoint irq-in 1 ,interval=1
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c7a28000
[00000000] *pgd=a79fd031, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#1]
Modules linked in: usbdmy tpdmy
CPU: 0
PC is at __free_pages+0x24/0x64
LR is at free_task+0x1c/0x34
pc : [<c005df04>]    lr : [<c003833c>]    Tainted: P
sp : c7e51eb0  ip : c7e51ec0  fp : c7e51ebc
r10: c7ddf3c8  r9 : 00000005  r8 : 00000000
r7 : 00000000  r6 : c7e50000  r5 : c7ddf320  r4 : c7ddf320
r3 : ffffffff  r2 : 00000000  r1 : 00000001  r0 : c03eb900
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment user
Control: 397F  Table: A7A28000  DAC: 00000015
Process default.hotplug (pid: 953, stack limit = 0xc7e501b0)
Stack: (0xc7e51eb0 to 0xc7e52000)
1ea0:                                     c7e51ed4 c7e51ec0 c003833c c005deec
1ec0: c7ddf320 c7ddf320 c7e51efc c7e51ed8 c003c924 c003832c c785e6c0 000003ba
1ee0: c7ddf320 c7e50000 c7ddf320 00000000 c7e51f84 c7e51f00 c003efbc c003c7b8
1f00: c785e6c0 4000cba4 c7a28000 00000000 c7a28000 c7861b60 00000000 c7861ac0
1f20: 7efff034 ffffffff 00000000 c7861ac0 c0036dec 00000000 00000000 c7e51f48
1f40: 00000000 c7861ac0 c0036dec c7861bc4 c7861bc4 c7e51fb0 00000001 ffffffea
1f60: 7efff034 ffffffff 00000072 c00231f4 c7e50000 00900072 c7e51fa4 c7e51f88
1f80: c003f404 c003e6a0 00000000 ffffffff c7e51fec 00000001 00000000 c7e51fa8
1fa0: c0022a60 c003f3d8 00000001 7efff034 ffffffff 7efff034 00000001 00000000
1fc0: 00000001 7efff034 ffffffff 000b4388 00000000 ffffffff 00000000 00000000
1fe0: 40018d30 7efff000 400f67a0 400f67c0 60000010 ffffffff 00000000 00000000
Backtrace:
[<c005dee0>] (__free_pages+0x0/0x64) from [<c003833c>] (free_task+0x1c/0x34)
[<c0038320>] (free_task+0x0/0x34) from [<c003c924>] (release_task+0x178/0x188)
 r4 = C7DDF320
[<c003c7ac>] (release_task+0x0/0x188) from [<c003efbc>] (do_wait+0x928/0xca8)
 r8 = 00000000  r7 = C7DDF320  r6 = C7E50000  r5 = C7DDF320
 r4 = 000003BA
[<c003e694>] (do_wait+0x0/0xca8) from [<c003f404>] (sys_wait4+0x38/0x4c)
[<c003f3cc>] (sys_wait4+0x0/0x4c) from [<c0022a60>] (ret_fast_syscall+0x0/0x2c)
 r4 = 00000001
Code: e2132001 189da800 e5903004 e3730001 (05822000)
 prev->state: 2 != TASK_RUNNING??
default.hotplug/953: BUG in __schedule at kernel/sched.c:2905
Unable to handle kernel NULL pointer dereference at virtual address 00000000
pgd = c7a3c000
[00000000] *pgd=a79a6031, *pte=00000000, *ppte=00000000
Internal error: Oops: 817 [#2]
Modules linked in: usbdmy tpdmy
CPU: 0
PC is at __free_pages+0x24/0x64
LR is at free_task+0x1c/0x34
pc : [<c005df04>]    lr : [<c003833c>]    Tainted: P
sp : c7a27eb0  ip : c7a27ec0  fp : c7a27ebc
r10: c7861b68  r9 : 00000005  r8 : 00000000
r7 : 00000000  r6 : c7a26000  r5 : c7861ac0  r4 : c7861ac0
r3 : ffffffff  r2 : 00000000  r1 : 00000001  r0 : c03ebfc0
Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  Segment user
Control: 397F  Table: A7A3C000  DAC: 00000015
Process default.hotplug (pid: 948, stack limit = 0xc7a261b0)
Stack: (0xc7a27eb0 to 0xc7a28000)
7ea0:                                     c7a27ed4 c7a27ec0 c003833c c005deec
7ec0: c7861ac0 c7861ac0 c7a27efc c7a27ed8 c003c924 c003832c c0016040 000003cb
7ee0: c7861ac0 c7a26000 c7861ac0 00000000 c7a27f84 c7a27f00 c003efbc c003c7b8
7f00: 00000000 00000001 c7a3c000 00000000 c7a3c000 c7ddf140 00000000 c7ddf0a0
7f20: 7efff684 ffffffff 00000000 c7ddf0a0 c0036dec 00000000 00000000 c7a27f48
7f40: 00000000 c7ddf0a0 c0036dec c7ddf1a4 c7ddf1a4 c7a27fb0 00000000 ffffffea
7f60: 7efff684 ffffffff 00000072 c00231f4 c7a26000 00900072 c7a27fa4 c7a27f88
7f80: c003f404 c003e6a0 00000000 ffffffff c7a27fec 00000001 00000000 c7a27fa8
7fa0: c0022a60 c003f3d8 00000001 7efff684 ffffffff 7efff684 00000001 00000000
7fc0: 00000001 7efff684 ffffffff 00000003 00000000 00000001 00000003 00000000
7fe0: 40018d30 7efff650 400f67a0 400f67c0 60000010 ffffffff 763074f6 0000023c
Backtrace:
[<c005dee0>] (__free_pages+0x0/0x64) from [<c003833c>] (free_task+0x1c/0x34)
[<c0038320>] (free_task+0x0/0x34) from [<c003c924>] (release_task+0x178/0x188)
 r4 = C7861AC0
[<c003c7ac>] (release_task+0x0/0x188) from [<c003efbc>] (do_wait+0x928/0xca8)
 r8 = 00000000  r7 = C7861AC0  r6 = C7A26000  r5 = C7861AC0
 r4 = 000003CB
[<c003e694>] (do_wait+0x0/0xca8) from [<c003f404>] (sys_wait4+0x38/0x4c)
[<c003f3cc>] (sys_wait4+0x0/0x4c) from [<c0022a60>] (ret_fast_syscall+0x0/0x2c)
 r4 = 00000001
Code: e2132001 189da800 e5903004 e3730001 (05822000)
 prev->state: 2 != TASK_RUNNING??
default.hotplug/948: BUG in __schedule at kernel/sched.c:2905
usbdmy_specify : len=2 data=$06 $00
drivers/usb/core/file.c: looking for a minor, starting at 181
Unable to handle kernel paging request at virtual address 0000a000
pgd = c0004000
[0000a000] *pgd=00000000
Internal error: Oops: 817 [#3]
Modules linked in: usbdmy tpdmy
CPU: 0
PC is at memcpy+0x5c/0x5a0
LR is at copy_process+0xbc/0xe14
pc : [<c010a4bc>]    lr : [<c0039300>]    Tainted: P
sp : c0467e0c  ip : 00000000  fp : c0467e34
r10: 00804111  r9 : 00000000  r8 : 00000000
r7 : 00000000  r6 : 00000000  r5 : 00000000  r4 : 00000000
r3 : 00000000  r2 : 00000030  r1 : c0466120  r0 : 00009ff4
Flags: nzCv  IRQs on  FIQs on  Mode SVC_32  Segment kernel
Control: 397F  Table: A7A38000  DAC: 00000017
Process khelper (pid: 5, stack limit = 0xc04661b0)
Stack: (0xc0467e0c to 0xc0468000)
7e00:                            00009ef4 c7ddfd20 c042f2c0 00009ef4 c0466000
7e20: fffffff4 c02d8388 c0467e7c c0467e38 c0039300 c010a46c 00000000 c0467ed8
7e40: 00000000 00000000 c0467ed8 00000000 00200200 00000000 00804111 000003cc
7e60: c0466000 00000000 00000000 c0467ed8 c0467ecc c0467e80 c003a1c4 c0039250
7e80: 00000000 00000000 000003cc c0467e98 00000000 c0467e94 c0467e94 c7ddfaa0
7ea0: c0467ecc 00804111 c0467ed8 c7a01d60 c004c548 c0431ec0 c7a01d60 c0431ec8
7ec0: c0467f3c c0467ed0 c002557c c003a100 00000000 00000000 00000000 c7a01d60
7ee0: c004c548 c003d5f0 00000000 00000000 00000000 00000000 00000000 00000000
7f00: 00000000 00000000 00000000 00000000 00000000 c0024d50 00000013 00000000
7f20: c7a01d60 c7a01d28 c0466000 00000000 c0467f54 c0467f40 c004c6c4 c0025514
7f40: c7a01e1c c7a01d2c c0467fc4 c0467f58 c004cccc c004c698 c0451f2c c004c68c
7f60: ffffffff ffffffff 00000001 00000000 c0036dec 00010000 00000000 c0466000
7f80: 00000000 c042f2c0 c0036dec 00100100 00200200 00000000 c0467fc4 c0431ec0
7fa0: c0466000 c0451f28 c004cac8 fffffffc 00000000 00000000 c0467ff4 c0467fc8
7fc0: c0051b74 c004cad4 ffffffff ffffffff 00000000 00000000 00000000 00000000
7fe0: 00000000 00000000 00000000 c0467ff8 c003d5f0 c0051a98 cc33cc33 cc33cc33
Backtrace:
[<c010a460>] (memcpy+0x0/0x5a0) from [<c0039300>] (copy_process+0xbc/0xe14)
 r9 = C02D8388  r8 = FFFFFFF4  r7 = C0466000  r6 = 00009EF4
 r5 = C042F2C0  r4 = C7DDFD20  r0 = 00009EF4
[<c0039244>] (copy_process+0x0/0xe14) from [<c003a1c4>] (do_fork+0xd0/0x1e8)
[<c003a0f4>] (do_fork+0x0/0x1e8) from [<c002557c>] (kernel_thread+0x74/0x84)
[<c0025508>] (kernel_thread+0x0/0x84) from [<c004c6c4>] (__call_usermodehelper+0x38/0x74)
 r7 = 00000000  r6 = C0466000  r5 = C7A01D28  r4 = C7A01D60
[<c004c68c>] (__call_usermodehelper+0x0/0x74) from [<c004cccc>] (worker_thread+0x204/0x2c0)
 r4 = C7A01D2C
[<c004cac8>] (worker_thread+0x0/0x2c0) from [<c0051b74>] (kthread+0xe8/0x11c)
[<c0051a8c>] (kthread+0x0/0x11c) from [<c003d5f0>] (do_exit+0x0/0xd8c)
 r8 = 00000000  r7 = 00000000  r6 = 00000000  r5 = 00000000
 r4 = 00000000
Code: f5d1f03c f5d1f05c e8b113f8 e2522020 (a8a013f8)

不知各位大侠能否帮我看看为什么会出现这样的错误。谢谢。

Answer 1

我认为您的内核或模块二进制文件已损坏。

因为您声明启动设备是 CF 卡，并且您的脚本会连续重启它 7000 次，所以在我看来，CF 卡必须承受相当多的写入事件。

只有 eMMC 和 micro-SD 卡等较新的闪存介质设备通常具有闪存磨损均衡的硬件支持，因此可以(几乎)安全地用作 ext3/ext4 文件系统。

对于较旧的闪存介质(如 CF 卡)，通常不会实现适当的闪存磨损均衡，并且只需要几天(有时是几个小时)就会磨损。

我的建议是检查您系统上的每个文件，如果校验和与另一个正常工作的系统的校验和相匹配。我几乎可以肯定，在您的情况下，至少有一个文件无法正确 check out 。