This is with the ptrace patch applied to 2.4.20 (SMP/i386/P3).
Thanks,
-- Ken. brownfld@irridia.com
Code: f6 40 7c 01 75 07 b8 ff ff ff ff c3 90 f6 42 18 01 74 1d b8 Using defaults from ksymoops -t elf32-i386 -a i386
Code; 00000000 Before first symbol 00000000 <_EIP>: Code; 00000000 Before first symbol 0: f6 40 7c 01 testb $0x1,0x7c(%eax) Code; 00000004 Before first symbol 4: 75 07 jne d <_EIP+0xd> 0000000d Before first symbol Code; 00000006 Before first symbol 6: b8 ff ff ff ff mov $0xffffffff,%eax Code; 0000000b Before first symbol b: c3 ret Code; 0000000c Before first symbol c: 90 nop Code; 0000000d Before first symbol d: f6 42 18 01 testb $0x1,0x18(%edx) Code; 00000011 Before first symbol 11: 74 1d je 30 <_EIP+0x30> 00000030 Before first symbol Code; 00000013 Before first symbol 13: b8 00 00 00 00 mov $0x0,%eax
Unable to handle kernel NULL pointer dereference at virtual address 0000007c c01211a3 *pde = 00000000 Oops: 0000 CPU: 1 EIP: 0010:[<c01211a3>] Not tainted EFLAGS: 00010202 eax: 00000000 ebx: ffffffff ecx: e75a0000 edx: d2746000 esi: 00000000 edi: d2746000 ebp: 40036110 esp: e75a1f8c ds: 0018 es: 0018 ss: 0018 Process gdb (pid: 28490, stackpage=e75a1000) Stack: c010c576 d2746000 00000000 e75a0000 00000000 00000005 bffff17c 00000004 bfffeed8 e75a0000 00000000 e75a0000 e75a1fc4 c0108b97 00000005 0000469b 40036110 00000000 00000005 bffff17c 0000001a 0000002b 0000002b 0000001a Call Trace: [<c010c576>] [<c0108b97>] Code: f6 40 7c 01 75 07 b8 ff ff ff ff c3 90 f6 42 18 01 74 1d b8
>>EIP; c01211a3 <ptrace_check_attach+13/84> <===== Trace; c010c576 <sys_ptrace+10a/608> Trace; c0108b97 <system_call+2f/34> Code; c01211a3 <ptrace_check_attach+13/84> 00000000 <_EIP>: Code; c01211a3 <ptrace_check_attach+13/84> <===== 0: f6 40 7c 01 testb $0x1,0x7c(%eax) <===== Code; c01211a7 <ptrace_check_attach+17/84> 4: 75 07 jne d <_EIP+0xd> c01211b0 <ptrace_check_attach+20/84> Code; c01211a9 <ptrace_check_attach+19/84> 6: b8 ff ff ff ff mov $0xffffffff,%eax Code; c01211ae <ptrace_check_attach+1e/84> b: c3 ret Code; c01211af <ptrace_check_attach+1f/84> c: 90 nop Code; c01211b0 <ptrace_check_attach+20/84> d: f6 42 18 01 testb $0x1,0x18(%edx) Code; c01211b4 <ptrace_check_attach+24/84> 11: 74 1d je 30 <_EIP+0x30> c01211d3 <ptrace_check_attach+43/84> Code; c01211b6 <ptrace_check_attach+26/84> 13: b8 00 00 00 00 mov $0x0,%eax
On Mon, Apr 07, 2003 at 02:22:05PM +0200, Michael Lampe wrote: | Since I upgraded from 2.4.20 to 2.4.21-pre6, totalview dies with a | segfault right after reading symbol information. The interesting | thing is that it also reproducibly triggers the following Oops. | | ----------------- | | ksymoops 2.4.3 on i686 2.4.21-pre6. Options used | -V (default) | -k /proc/ksyms (default) | -l /proc/modules (default) | -o /lib/modules/2.4.21-pre6/ (default) | -m /boot/System.map (default) | | Warning: You did not tell me where to find symbol information. I will | assume that the log matches the kernel and modules that are running | right now and I'll use the default options above for symbol resolution. | If the current kernel and/or modules do not match the log, you can get | more accurate output by telling me the kernel version and where to find | map, modules, ksyms etc. ksymoops -h explains the options. | | Apr 6 00:28:18 sam kernel: Unable to handle kernel NULL pointer dereference at virtual address 0000007c | Apr 6 00:28:18 sam kernel: c0118c33 | Apr 6 00:28:18 sam kernel: *pde = 00000000 | Apr 6 00:28:18 sam kernel: Oops: 0000 | Apr 6 00:28:18 sam kernel: CPU: 0 | Apr 6 00:28:18 sam kernel: EIP: 0010:[<c0118c33>] Not tainted | Using defaults from ksymoops -t elf32-i386 -a i386 | Apr 6 00:28:18 sam kernel: EFLAGS: 00010202 | Apr 6 00:28:18 sam kernel: eax: 00000000 ebx: 00000001 ecx: 00000476 edx: cba1e000 | Apr 6 00:28:18 sam kernel: esi: 00000007 edi: cba1e000 ebp: ffffffff esp: c44d3f98 | Apr 6 00:28:18 sam kernel: ds: 0018 es: 0018 ss: 0018 | Apr 6 00:28:18 sam kernel: Process tv6main (pid: 1137, stackpage=c44d3000) | Apr 6 00:28:18 sam kernel: Stack: c0109bd3 cba1e000 00000000 c44d2000 00000009 00000007 bfffef64 00000000 | Apr 6 00:28:18 sam kernel: c0106cc4 c44d3fc4 c0106bd3 00000007 00000476 00000001 00000009 00000007 | Apr 6 00:28:18 sam kernel: bfffef64 0000001a 0000002b 0000002b 0000001a 400e92b6 00000023 00000202 | Apr 6 00:28:18 sam kernel: Call Trace: [<c0109bd3>] [<c0106cc4>] [<c0106bd3>] | Apr 6 00:28:18 sam kernel: Code: f6 40 7c 01 75 07 b8 ff ff ff ff c3 90 f6 42 18 01 75 0a b8 | | >>EIP; c0118c32 <ptrace_check_attach+12/50> <===== | Trace; c0109bd2 <sys_ptrace+b6/580> | Trace; c0106cc4 <error_code+34/3c> | Trace; c0106bd2 <system_call+32/38> | Code; c0118c32 <ptrace_check_attach+12/50> | 00000000 <_EIP>: | Code; c0118c32 <ptrace_check_attach+12/50> <===== | 0: f6 40 7c 01 testb $0x1,0x7c(%eax) <===== | Code; c0118c36 <ptrace_check_attach+16/50> | 4: 75 07 jne d <_EIP+0xd> c0118c3e <ptrace_check_attach+1e/50> | Code; c0118c38 <ptrace_check_attach+18/50> | 6: b8 ff ff ff ff mov $0xffffffff,%eax | Code; c0118c3c <ptrace_check_attach+1c/50> | b: c3 ret | Code; c0118c3e <ptrace_check_attach+1e/50> | c: 90 nop | Code; c0118c3e <ptrace_check_attach+1e/50> | d: f6 42 18 01 testb $0x1,0x18(%edx) | Code; c0118c42 <ptrace_check_attach+22/50> | 11: 75 0a jne 1d <_EIP+0x1d> c0118c4e <ptrace_check_attach+2e/50> | Code; c0118c44 <ptrace_check_attach+24/50> | 13: b8 00 00 00 00 mov $0x0,%eax | | | 1 warning issued. Results may not be reliable. | | ----------------- | | /usr/src/linux# sh scripts/ver_linux | If some fields are empty or look unusual you may have an old version. | Compare to the current minimal requirements in Documentation/Changes. | | Linux sam 2.4.21-pre6 #2 Tue Mar 4 04:19:42 CET 2003 i686 unknown | | Gnu C 2.95.3 | Gnu make 3.79.1 | util-linux 2.11q | mount 2.11q | modutils 2.4.18 | e2fsprogs 1.32 | reiserfsprogs 3.6.5 | Linux C Library x 1 root root 1371591 Nov 10 19:17 /lib/libc.so.6 | Dynamic linker (ldd) 2.2.5 | Procps 2.0.7 | Net-tools 1.60 | Kbd 0.99 | Sh-utils 2.0 | Modules Loaded mga agpgart | | ----------------- | | /usr/src/linux# cat /proc/cpuinfo | processor : 0 | vendor_id : GenuineIntel | cpu family : 6 | model : 6 | model name : Celeron (Mendocino) | stepping : 5 | cpu MHz : 434.323 | cache size : 128 KB | fdiv_bug : no | hlt_bug : no | f00f_bug : no | coma_bug : no | fpu : yes | fpu_exception : yes | cpuid level : 2 | wp : yes | flags : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr | bogomips : 865.07 | | ----------------- | | -Michael | - | To unsubscribe from this list: send the line "unsubscribe linux-kernel" in | the body of a message to majordomo@vger.kernel.org | More majordomo info at http://vger.kernel.org/majordomo-info.html | Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/