On (20/02/05 10:00), John Ogness wrote: > On 2020-02-05, Sergey Senozhatsky <sergey.senozhatsky.work@xxxxxxxxx> wrote: > >>>> So there is a General protection fault. That's the type of a > >>>> problem that kills the boot for me as well (different backtrace, > >>>> tho). > >>> > >>> Do you have CONFIG_RELOCATABLE and CONFIG_RANDOMIZE_BASE (KASLR) > >>> enabled? > >> > >> Yes. These two options are enabled. > >> > >> CONFIG_RELOCATABLE=y > >> CONFIG_RANDOMIZE_BASE=y > > > > So KASLR kills the boot for me. So does KASAN. > > Sergey, thanks for looking into this already! > So I hacked the system a bit. 3BUG: KASAN: wild-memory-access in copy_data+0x129/0x220> 3Write of size 4 at addr 5a5a5a5a5a5a5a5a by task cat/474> Call Trace:> dump_stack+0x76/0xa0> ? copy_data+0x129/0x220> __kasan_report.cold+0x5/0x3b> ? get_page_from_freelist+0x1224/0x1490> ? copy_data+0x129/0x220> copy_data+0x129/0x220> _prb_read_valid+0x1a0/0x330> ? prb_first_seq+0xe0/0xe0> ? __might_sleep+0x2f/0xd0> ? __zone_watermark_ok+0x180/0x180> ? ___might_sleep+0xbe/0xe0> prb_read_valid+0x4f/0x60> ? _prb_read_valid+0x330/0x330> devkmsg_read+0x12e/0x3d0> ? __mod_node_page_state+0x1a/0xa0> ? info_print_ext_header.constprop.0+0x120/0x120> ? __lru_cache_add+0x16c/0x190> ? __handle_mm_fault+0x1097/0x1f60> vfs_read+0xdc/0x200> ksys_read+0xa0/0x130> ? kernel_write+0xb0/0xb0> ? up_read+0x56/0x130> do_syscall_64+0xa0/0x520> ? syscall_return_slowpath+0x210/0x210> ? do_page_fault+0x399/0x4fa> entry_SYSCALL_64_after_hwframe+0x44/0xa9> RIP: 0033:0x7ff5f39813f2> Code: c0 e9 c2 fe ff ff 50 48 8d 3d 9a 0d 0a 00 e8 95 ed 01 00 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 0f 05 <48> 3d 00 f0 ff ff 77 56 c3 0f 1f 44 00 00 48 83 ec 28 48 89 54 24> RSP: 002b:00007ffc47b3ee58 EFLAGS: 0000024> c ORIG_RAX: 0000000000000000> RAX: ffffffffffffffda RBX: 0000000000020000 RCX: 00007ff5f39813f2> RDX: 0000000000020000 RSI: 00007ff5f3588000 RDI: 0000000000000003> RBP: 00007ff5f3588000 R08: 00007ff5f3587010 R09: 0000000000000000> R10: 0000000000000022 R11: 0000000000000246 R12: 000055f9c8a81c00> R13: 0000000000000003 R14: 0000000000020000 R15: 0000000000020000> -ss _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
