From mboxrd@z Thu Jan 1 00:00:00 1970 From: coolsandyforyou@gmail.com (sandeep kumar) Date: Fri, 2 Sep 2011 16:41:11 +0530 Subject: analysis of kernel panic logs. In-Reply-To: References:

Message-ID: To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org Logs after enabling the CONFIG_DEBUG_USER and setting user_debug to 255, to get more info....(as suggested by Dave..) <3>[ 89.663286] init: [boot time] processing action 0x4c5e8 (property:init.svc.samsungani=stopped) <3>[ 89.663988] init: [boot time] processing action 0x4ef20 (property:init.svc.samsungani=stopped) <7>[ 89.664049] init: unhandled page fault (11) at 0x00000000, code 0x80000007 <1>[ 89.664080] pgd = de370000 <1>[ 89.664110] [00000000] *pgd=5eb83031, *pte=00000000, *ppte=00000000 <4>[ 89.664141] <4>[ 89.664171] Pid: 1, comm: init <4>[ 89.664202] CPU: 1 Not tainted (2.6.35.11 #4) <4>[ 89.664232] PC is at 0x0 <4>[ 89.664232] LR is at 0xc92f <4>[ 89.664263] pc : [<00000000>] lr : [<0000c92f>] psr: 60000010 <4>[ 89.664293] sp : bebb5e70 ip : ffffff88 fp : 00000000 <4>[ 89.664324] r10: 0003777c r9 : 00000001 r8 : 00000001 <4>[ 89.664355] r7 : 0003777c r6 : bebb5e94 r5 : 00000000 r4 : 0003777c <4>[ 89.664385] r3 : 00000000 r2 : 0004ef40 r1 : 0004ef50 r0 : 00000033 <4>[ 89.664446] Flags: nZCv IRQs on FIQs on Mode USER_32 ISA ARM Segment user <4>[ 89.664477] Control: 10c57c7d Table: 5e77006a DAC: 00000015 <0>[ 89.664660] Kernel panic - not syncing: Attempted to kill init! <4>[ 89.664721] [] (unwind_backtrace+0x0/0x164) from [] (panic+0x6c/0xec) <4>[ 89.664782] [] (panic+0x6c/0xec) from [] (do_exit+0x70/0x6a0) <4>[ 89.664812] [] (do_exit+0x70/0x6a0) from [] (do_group_exit+0x90/0xc0) <4>[ 89.664873] [] (do_group_exit+0x90/0xc0) from [] (get_signal_to_deliver+0x3e0/0x424) <4>[ 89.664934] [] (get_signal_to_deliver+0x3e0/0x424) from [] (do_signal+0x68/0x640) <4>[ 89.664995] [] (do_signal+0x68/0x640) from [] (do_notify_resume+0x18/0x38) <4>[ 89.665056] [] (do_notify_resume+0x18/0x38) from [] (work_pending+0x1c/0x20) <2>[ 89.665117] CPU0: stopping <0>[ 89.665117] Rebooting in 5 seconds..[] (unwind_backtrace+0x0/0x164) from [] (do_IPI+0xd8/0x154) <4>[ 89.665178] [] (do_IPI+0xd8/0x154) from [] (__irq_svc+0x4c/0xe4) <4>[ 89.665240] Exception stack(0xdc02fd90 to 0xdc02fdd8) <4>[ 89.665270] fd80: c1bd34a0 ffffffff c1bd34a8 40100068 <4>[ 89.665301] fda0: c1bd34a0 dcd060b0 00000008 761945df c1bd34a0 ddd5ac90 00000001 77fa555f <4>[ 89.665362] fdc0: 00000001 dc02fdd8 c0221558 c0213e68 20000113 ffffffff <4>[ 89.665423] [] (__irq_svc+0x4c/0xe4) from [] (put_page+0xc/0x120) <4>[ 89.665453] [] (put_page+0xc/0x120) from [] (do_wp_page+0x5fc/0x6f4) <4>[ 89.665514] [] (do_wp_page+0x5fc/0x6f4) from [] (handle_mm_fault+0x66c/0x718) <4>[ 89.665575] [] (handle_mm_fault+0x66c/0x718) from [] (do_page_fault+0x190/0x35c) <4>[ 89.665636] [] (do_page_fault+0x190/0x35c) from [] (do_DataAbort+0x34/0x94) <4>[ 89.665667] [] (do_DataAbort+0x34/0x94) from [] (ret_from_exception+0x0/0x10) <4>[ 89.665728] Exception stack(0xdc02ffb0 to 0xdc02fff8) <4>[ 89.665758] ffa0: 00000001 40548448 00000000 4576c008 <4>[ 89.665789] ffc0: 00015a36 00052378 40548448 40548448 00000003 801a6610 80198a08 8018abbf <4>[ 89.665850] ffe0: 801a6828 beb0c340 80151525 8016d202 00000030 ffffffff <3>[ 94.671801] set_dload_mode <0> ( c0171bf8 ) <5>[ 94.671862] Going down for restart now On Fri, Sep 2, 2011 at 12:56 PM, Mulyadi Santosa wrote: > Hi :) > > On Fri, Sep 2, 2011 at 13:03, sandeep kumar > wrote: > > Hi, > > > > im working on android, kernel version 2.6.35.11 > > Briefly checking the dump, looks like it's ARM processor? > > > I got these logs showing kernel panic and the target is rebooting. > > > > From the logs i understood in init process something is causing kernel > > panic. > .....[cut].... > > [] (do_signal+0x68/0x640) > > <4>[ 85.237359] [] (do_signal+0x68/0x640) from [] > > (do_notify_resume+0x18/0x38) > > <4>[ 85.237450] [] (do_notify_resume+0x18/0x38) from > > [] (work_pending+0x1c/0x20) > > with the asumption that Android kernel is just another version of > Linux kernel, I think this backtrace shows us that something is wrong > with one (or more) work queue (or thread worker? something like that) > you or somebody else has made. > > So, do you recally creating one? > > > <0>[ 85.237542] Rebooting in 5 seconds.. > > <2>[ 85.237572] CPU0: stopping > > <4>[ 85.237603] [] (unwind_backtrace+0x0/0x164) from > > [] (do_IPI+0xd8/0x154) > > <4>[ 85.237695] [] (do_IPI+0xd8/0x154) from [] > > (__irq_usr+0x48/0xe0) > > So, rebooting fails? looks like something is clobbering the kernel > stack way too much IMHO... > > > <4>[ 85.237756] Exception stack(0xdc18dfb0 to 0xdc18dff8) > > <4>[ 85.237817] dfa0: 00000000 > > 0000007c 00000000 4097b240 > > <4>[ 85.237878] dfc0: 45957cfe 4ba95bd8 4fc24a48 000000f4 80118200 > > ffffe9f4 00000000 801a6374 > > <4>[ 85.237939] dfe0: 000000f4 4fc249f8 8011d0a8 8011bf18 20000010 > > ffffffff > > I am not familiar with those register names, sorry... > > -- > regards, > > Mulyadi Santosa > Freelance Linux trainer and consultant > > blog: the-hydra.blogspot.com > training: mulyaditraining.blogspot.com > -- With regards, Sandeep Kumar Anantapalli, -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110902/439d1f5f/attachment.html