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bt command coredump
when I use crash-7-branch code to parse the MTK arm64 dump, bt command got a coredump. log is here: 1、 crash ./symbols/vmlinux SYS_COREDUMP
crash 7.3.2 Copyright (C) 2002-2022 Red Hat, Inc. Copyright (C) 2004, 2005, 2006, 2010 IBM Corporation Copyright (C) 1999-2006 Hewlett-Packard Co Copyright (C) 2005, 2006, 2011, 2012 Fujitsu Limited Copyright (C) 2006, 2007 VA Linux Systems Japan K.K. Copyright (C) 2005, 2011, 2020-2022 NEC Corporation Copyright (C) 1999, 2002, 2007 Silicon Graphics, Inc. Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc. This program is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Enter "help copying" to see the conditions. This program has absolutely no warranty. Enter "help warranty" for details.
BFD: ./symbols/vmlinux: don't know how to handle section .relr.dyn' [0x 13] BFD: ./symbols/vmlinux: don't know how to handle section .relr.dyn' [0x 13]
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This GDB was configured as "--host=x86_64-unknown-linux-gnu --target=aarch64-elf-linux"...
BFD: /mnt/disk/code/dumpdump/20231231080842-00691540-fulldump/symbols/vmlinux: don't know how to handle section `.relr.dyn' [0x 13]
WARNING: kernel relocated [104616MB]: patching 183134 gdb minimal_symbol values
WARNING: cpu 0: cannot find NT_PRSTATUS note WARNING: cpu 1: cannot find NT_PRSTATUS note WARNING: cpu 2: cannot find NT_PRSTATUS note WARNING: cpu 3: cannot find NT_PRSTATUS note WARNING: cpu 4: cannot find NT_PRSTATUS note WARNING: cpu 6: cannot find NT_PRSTATUS note WARNING: cpu 7: cannot find NT_PRSTATUS note KERNEL: ./symbols/vmlinux [TAINTED] DUMPFILE: SYS_COREDUMP CPUS: 8 [OFFLINE: 7] DATE: Sun Dec 31 16:02:42 CST 2023 UPTIME: 1 days, 22:05:37 LOAD AVERAGE: 80.90, 68.00, 44.75 TASKS: 551 NODENAME: localhost RELEASE: 4.19.191+ VERSION: #1 SMP PREEMPT Thu Dec 7 11:32:01 CST 2023 MACHINE: aarch64 (unknown Mhz) MEMORY: 7.7 GB PANIC: "-(5)[75:khungtaskd]Kernel panic - not syncing: hungtask: blocked tasks" PID: 75 COMMAND: "khungtaskd" TASK: ffffffcd92d349c0 [THREAD_INFO: ffffffcd92d349c0] CPU: 5 STATE: TASK_RUNNING (PANIC)
crash> bt PID: 75 TASK: ffffffcd92d349c0 CPU: 5 COMMAND: "khungtaskd" Segmentation fault (core dumped)
2、 gdb ~/code/github/crash22/crash/crash ./core-crash-28039-11-1705478417 GNU gdb (Ubuntu 12.1-0ubuntu1~22.04) 12.1 Copyright (C) 2022 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: https://www.gnu.org/software/gdb/bugs/. Find the GDB manual and other documentation resources online at: http://www.gnu.org/software/gdb/documentation/.
For help, type "help". Type "apropos word" to search for commands related to "word"... Reading symbols from /mnt/disk/code/github/crash22/crash/crash... [New LWP 28039] [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". Core was generated by `/mnt/disk/code/github/crash22/crash/crash ./symbols/vmlinux SYS_CORED'. Program terminated with signal SIGSEGV, Segmentation fault. #0 arm64_is_kernel_exception_frame (bt=bt@entry=0x7fff65db1f60, stkptr=stkptr@entry=18446743524087971344) at arm64.c:2370 2370 if (INSTACK(regs->sp, bt) && INSTACK(regs->regs[29], bt) && (gdb) q
1、add this code， not working。 2369 error(WARNING, 2370 "xxxxa: fp: %lx sp: %lx pc: %lx\n", 2371 stkptr, STACK_OFFSET_TYPE(stkptr), STACKSIZE()); 2372 error(WARNING, 2373 "xxxx22: fp: %lx sp: %lx pc: %lx\n", 2374 bt->stacktop, bt->stackbase, 0); 2375 if (stkptr > STACKSIZE() && !INSTACK(stkptr, bt)) { 2376 if (CRASHDEBUG(1)) 2377 error(WARNING, "stkptr: %lx is outside the kernel stack range\n", stkptr); 2378 return FALSE; 2379 }
bt PID: 64 TASK: ffffffc24c0b5b80 CPU: 6 COMMAND: "khungtaskd" bt: WARNING: xxxxarm64_unwind_frame: switch stacks: fp: ffffff8008003de0 sp: ffffffffff693de0 pc: 4000 bt: WARNING: xxxx22arm64_unwind_frame: switch stacks: fp: ffffff8008974000 sp: ffffff8008970000 pc: 0 #0 [ffffff8008003f10] ipi_cpu_stop at ffffff9096a2a310 Segmentation fault (core dumped)
2、 add fatal error print，it works
2369 error(FATAL, 2370 "xxxxa: fp: %lx sp: %lx pc: %lx\n", 2371 stkptr, STACK_OFFSET_TYPE(stkptr), STACKSIZE());
crash-8.0.4 also core dump when execute bt.
crash> bt
PID: 1806 TASK: ffff88810bc40000 CPU: 4 COMMAND: "insmod"
#0 [ffff88810cef7240] machine_kexec at ffffffff9cf9338f
#1 [ffff88810cef7348] __crash_kexec at ffffffff9d32409f
#2 [ffff88810cef74a8] crash_kexec at ffffffff9d327b88
#3 [ffff88810cef7540] oops_end at ffffffff9cec813b
#4 [ffff88810cef7568] die_addr at ffffffff9cec8b70
#5 [ffff88810cef75a0] exc_general_protection at ffffffff9fe349b9
#6 [ffff88810cef7640] asm_exc_general_protection at ffffffffa000122b
[exception RIP: generate_oops+53]
RIP: ffffffffc14c0105 RSP: ffff88810cef76f0 RFLAGS: 00010282
RAX: 0000000000000008 RBX: ffff88810cef77d0 RCX: 0000000000000001
RDX: dffffc0000000001 RSI: ffff88810cef7760 RDI: 0000000000000000
RBP: ffff88810cef7708 R8: 000000000073706f R9: 0000000000000001
R10: ffffffffa23266e7 R11: ffffffffa00000ea R12: 1ffff110219deee6
R13: 0000000000000000 R14: 0000000000000004 R15: ffff88810cef7898
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
Segmentation fault
