Hi Bruce and All Finally after a long innings I have diagnosed the mystery behind the below segfault that we see on kernel 3.8 which compiled with gcc 4.8 but don't show when compiled with gcc 4.7
Unable to handle kernel paging request at virtual address ffffffff pgd = c0004000 [ffffffff] *pgd=07ffe831, *pte=00000000, *ppte=00000000 Internal error: Oops: 17 [#1] PREEMPT ARM Modules linked in: CPU: 0 Not tainted (3.8.0-yocto-standard+ #32) PC is at kmem_cache_alloc+0x38/0x154 LR is at subsys_system_register+0x34/0xd8 pc : [<c00bd4d8>] lr : [<c0327244>] psr: a0000153 sp : c7835ef0 ip : c7904590 fp : 00000000 r10: c0688dc4 r9 : c06db900 r8 : c0327244 r7 : 00000000 r6 : 000080d0 r5 : c7801380 r4 : ffffffff r3 : 00000000 r2 : 00000078 r1 : 000080d0 r0 : c7801380 Flags: NzCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment kernel Control: 00093177 Table: 00004000 DAC: 00000017 Process swapper (pid: 1, stack limit = 0xc78341b8) Stack: (0xc7835ef0 to 0xc7836000) 5ee0: c06a5564 c06b8b8c c7834028 00000000 5f00: c0680218 c0327244 c7835f28 c06a5564 00000006 c7834028 c06db900 c0688dd4 5f20: c7835f28 c00089a0 c0657f44 00000006 c086e561 00000006 00000000 c06a5534 5f40: c06a5564 00000006 c06db900 c0680218 c069fd68 0000008e c069fd5c c0680924 5f60: 00000006 00000006 c0680218 00000000 00000000 00000000 00000000 00000000 5f80: c04f5e68 00000000 00000000 00000000 00000000 00000000 00000000 c04f5e70 5fa0: 00000000 00000000 c04f5e68 c000deb0 00000000 00000000 00000000 00000000 5fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 5fe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [<c00bd4d8>] (kmem_cache_alloc+0x38/0x154) from [<c0327244>] (subsys_system_register+0x34/0xd8) [<c0327244>] (subsys_system_register+0x34/0xd8) from [<c0688dd4>] (init_clocksource_sysfs+0x10/0x54) [<c0688dd4>] (init_clocksource_sysfs+0x10/0x54) from [<c00089a0>] (do_one_initcall+0x10c/0x17c) [<c00089a0>] (do_one_initcall+0x10c/0x17c) from [<c0680924>] (kernel_init_freeable+0x164/0x224) [<c0680924>] (kernel_init_freeable+0x164/0x224) from [<c04f5e70>] (kernel_init+0x8/0x150) [<c04f5e70>] (kernel_init+0x8/0x150) from [<c000deb0>] (ret_from_fork+0x14/0x24) Code: e5934000 e3540000 0a00001a e5953014 (e7941003) ---[ end trace f4d187650e17fc5c ]--- Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b Please apply the patch below to linux-yocto-3.8 http://sakrah.dontexist.org/files/patches/0001-ARM-7668-1-fix-memset-related-crashes-caused-by-rece.patch This is a back port from 3.9 therefore safe. The problem is not limited to linux-yocto it also impacts upstream 3.8 stable but 3.8 stable is end of life so why bother. If linux-yocto upgrades to 3.9 or 3.10 and drops 3.8 in 1.5 then we are ok too. Let me know how it goes Thanks -Khem _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
