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分享内核崩溃如何解
崩溃时曝出：
[20160114_21:08:28]Unable to handle kernel paging request at virtual address 0000ffb0
[20160114_21:08:28]atmel_mxt_ts 1-004a: Interrupt triggered but zero messages
[20160114_21:08:28]pgd = 80004000
[20160114_21:08:28][0000ffb0] *pgd=00000000
[20160114_21:08:28]Internal error: Oops - BUG: 17 [#1] PREEMPT SMP ARM
[20160114_21:08:28]Modules linked in: mbt8xxx(O) sd8xxx(O) mlan(PO) cfg80211
[20160114_21:08:28]CPU: 1 PID: 2220 Comm: kworker/1:2 Tainted: P O 3.10.45 #591
[20160114_21:08:28]Workqueue: kinteractive_down 0x80315c88
[20160114_21:08:28]task: ace99900 ti: acacc000 task.ti: acacc000
[20160114_21:08:28]pc : [<804e90e0>] lr : [<80313434>] psr: 200f0013
[20160114_21:08:28]sp : acacdd78 ip : acacdd88 fp : acacdd84
[20160114_21:08:28]r10: 00000001 r9 : acacde68 r8 : 00000001
[20160114_21:08:28]r7 : acacde68 r6 : 00000002 r5 : ac34f2c0 r4 : 00000001
[20160114_21:08:28]r3 : acacc000 r2 : 00000001 r1 : 807e0001 r0 : 0000ffb0
[20160114_21:08:28]Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[20160114_21:08:28]Control: 10c5387d Table: 3c7c804a DAC: 00000015
[20160114_21:08:28]Process kworker/1:2 (pid: 2220, stack limit = 0xacacc238)
[20160114_21:08:28]Stack: (0xacacdd78 to 0xacace000)
[20160114_21:08:29]dd60: acacdda4 acacdd88
[20160114_21:08:29]dd80: 80313434 804e90c4 80313378 fffffffe 00000000 00000000 acacddcc acacdda8
[20160114_21:08:29]dda0: 8004a420 80313384 ffffffff 807eff3c 807eff24 00000000 00000000 ffffffff
[20160114_21:08:29]ddc0: acacde04 acacddd0 8004a888 8004a3e0 00000000 8004a7b8 00000000 acacde68
[20160114_21:08:29]dde0: ac34b780 8076055c 00000001 807f0020 807560e0 810140e0 acacde1c acacde08
如何根据上面信息找到崩溃的函数？
[20160114_21:08:28]Unable to handle kernel paging request at virtual address 0000ffb0
[20160114_21:08:28]atmel_mxt_ts 1-004a: Interrupt triggered but zero messages
[20160114_21:08:28]pgd = 80004000
[20160114_21:08:28][0000ffb0] *pgd=00000000
[20160114_21:08:28]Internal error: Oops - BUG: 17 [#1] PREEMPT SMP ARM
[20160114_21:08:28]Modules linked in: mbt8xxx(O) sd8xxx(O) mlan(PO) cfg80211
[20160114_21:08:28]CPU: 1 PID: 2220 Comm: kworker/1:2 Tainted: P O 3.10.45 #591
[20160114_21:08:28]Workqueue: kinteractive_down 0x80315c88
[20160114_21:08:28]task: ace99900 ti: acacc000 task.ti: acacc000
[20160114_21:08:28]pc : [<804e90e0>] lr : [<80313434>] psr: 200f0013
[20160114_21:08:28]sp : acacdd78 ip : acacdd88 fp : acacdd84
[20160114_21:08:28]r10: 00000001 r9 : acacde68 r8 : 00000001
[20160114_21:08:28]r7 : acacde68 r6 : 00000002 r5 : ac34f2c0 r4 : 00000001
[20160114_21:08:28]r3 : acacc000 r2 : 00000001 r1 : 807e0001 r0 : 0000ffb0
[20160114_21:08:28]Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
[20160114_21:08:28]Control: 10c5387d Table: 3c7c804a DAC: 00000015
[20160114_21:08:28]Process kworker/1:2 (pid: 2220, stack limit = 0xacacc238)
[20160114_21:08:28]Stack: (0xacacdd78 to 0xacace000)
[20160114_21:08:29]dd60: acacdda4 acacdd88
[20160114_21:08:29]dd80: 80313434 804e90c4 80313378 fffffffe 00000000 00000000 acacddcc acacdda8
[20160114_21:08:29]dda0: 8004a420 80313384 ffffffff 807eff3c 807eff24 00000000 00000000 ffffffff
[20160114_21:08:29]ddc0: acacde04 acacddd0 8004a888 8004a3e0 00000000 8004a7b8 00000000 acacde68
[20160114_21:08:29]dde0: ac34b780 8076055c 00000001 807f0020 807560e0 810140e0 acacde1c acacde08
如何根据上面信息找到崩溃的函数？
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jlovej1314 2016-03-28
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你的系统很奇怪，内核态起始地址不是0xc0000000，敢问是什么嵌入式系统吗？
你的问题是访问非法内存，一般是踩内存、踩页表的问题；而并不是函数本身的问题（Workqueue: kinteractive_down 0x80315c88），此函数为处理工作队列的内核线程，一般不会有什么问题。
针对内存飞踩，没有什么好的定位手段（kudmp+crash可以看看整个系统被踩成什么样），只有分析代码看看哪里会产生内存越界、非法指针的引用等。
