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SubjectRe: Oops+Panic report - quite long
hi,

Sorry about the last mail. insmod dumps core because I did not recompile
my driver after adding the patch.

I am sorry to say that your patch did not help much at all. The ksymoops
o/p of 'insmod driver.o' is exactly the same as before.

ksymoops 0.7c on i586 2.2.10. Options used
-v /usr/src/linux/vmlinux (specified)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /home/rajukv/pqs/driver (specified)
-m /usr/src/linux/System.map (default)

No modules in ksyms, skipping objects
Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid
lsmod file?
Unable to handle kernel NULL pointer dereference at virtual address
0000002c
current->tss.cr3 = 0048b000, %cr3 = 0048b000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c281832d>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010286
eax: 00000000 ebx: 00000000 ecx: 00000000 edx: c282b7b0
esi: 00000000 edi: 0000007f ebp: c154fe8c esp: c154fe5c
ds: 0018 es: 0018 ss: 0018
Process insmod (pid: 590, process nr: 48, stackpage=c154f000)
Stack: 0000007f 00000001 00000000 c154fe84 00000001 00000000 00000bb8
c1cfb278
00000000 00026c7f c1cfb000 c154feb0 c154feb0 c0112096 00000000
00000001
c0224a20 00000000 00000001 ffffff0f c0118b23 c154fecc c0118b45
c154fed4
Call Trace: [<c0112096>] [<c0118b23>] [<c0118b45>] [<c281004c>]
[<c01099e2>] [<c
281a880>] [<c0107acc>]
[<c281004c>] [<c281a880>] [<c018c9f9>] [<c281a880>] [<c281004c>]
[<c01afd
8c>] [<c018d21e>] [<c281a880>]
[<c2810000>] [<c2810069>] [<c281a880>] [<c01161a7>] [<c2810000>]
[<c282b8
1c>] [<c2810048>] [<c0107a30>]
[<c2810000>]
Code: 8b 40 2c 8b 40 0c 8b 00 89 45 fc 8b 4d fc 8b 51 2c 83 ba 40
>>EIP; c281832d <END_OF_CODE+25e7629/????> <=====
Trace; c0112096 <timer_bh+37a/3ec>
Trace; c0118b23 <do_bottom_half+5f/a0>
Trace; c0118b45 <do_bottom_half+81/a0>
Trace; c281004c <END_OF_CODE+25df348/????>
Trace; c01099e2 <do_IRQ+52/5c>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c0107acc <ret_from_intr+0/20>
Trace; c281004c <END_OF_CODE+25df348/????>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c018c9f9 <scsi_register_host+59/264>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c281004c <END_OF_CODE+25df348/????>
Trace; c01afd8c <__generic_copy_from_user+30/40>
Trace; c018d21e <scsi_register_module+2a/5c>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c2810000 <END_OF_CODE+25df2fc/????>
Trace; c2810069 <END_OF_CODE+25df365/????>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c01161a7 <sys_init_module+46b/4ec>
Trace; c2810000 <END_OF_CODE+25df2fc/????>
Trace; c282b81c <END_OF_CODE+25fab18/????>
Trace; c2810048 <END_OF_CODE+25df344/????>
Trace; c0107a30 <system_call+34/38>
Trace; c2810000 <END_OF_CODE+25df2fc/????>
Code; c281832d <END_OF_CODE+25e7629/????>
00000000 <_EIP>:
Code; c281832d <END_OF_CODE+25e7629/????> <=====
0: 8b 40 2c mov 0x2c(%eax),%eax <=====
Code; c2818330 <END_OF_CODE+25e762c/????>
3: 8b 40 0c mov 0xc(%eax),%eax
Code; c2818333 <END_OF_CODE+25e762f/????>
6: 8b 00 mov (%eax),%eax
Code; c2818335 <END_OF_CODE+25e7631/????>
8: 89 45 fc mov %eax,0xfffffffc(%ebp)
Code; c2818338 <END_OF_CODE+25e7634/????>
b: 8b 4d fc mov 0xfffffffc(%ebp),%ecx
Code; c281833b <END_OF_CODE+25e7637/????>
e: 8b 51 2c mov 0x2c(%ecx),%edx
Code; c281833e <END_OF_CODE+25e763a/????>
11: 83 ba 40 00 00 00 00 cmpl $0x0,0x40(%edx)
Aiee, killing interrupt handler
Unable to handle kernel NULL pointer dereference at virtual address
00000000
current->tss.cr3 = 00101000, %cr3 = 00101000
*pde = 00000000
Oops: 0002
CPU: 0
EIP: 0010:[<c01111c2>]
EFLAGS: 00010282
eax: 00000018 ebx: c154e000 ecx: 00000005 edx: c19a0000
esi: 00000000 edi: c154e000 ebp: c154fdbc esp: c154fd98
ds: 0018 es: 0018 ss: 0018
Process insmod (pid: 590, process nr: 48, stackpage=c154f000)
Stack: 00000000 c154e000 00000000 c0117789 c154e000 c154e000 00000000
00000000
c154e000 00000021 c0117b75 c154fe20 00000000 0000002c c154e000
c1284800
c128488c c154e000 c0107f1b 0000000b 00000000 c010ec78 c01b77ee
c154fe20
Call Trace: [<c0117789>] [<c0117b75>] [<c0107f1b>] [<c010ec78>]
[<c01b77ee>] [<c0107b35>] [<c282b7b0>]
[<c281832d>] [<c28182b0>] [<c0112096>] [<c0118b23>] [<c0118b45>]
[<c28100
4c>] [<c01099e2>] [<c281a880>]
[<c0107acc>] [<c281004c>] [<c281a880>] [<c018c9f9>] [<c281a880>]
[<c28100
4c>] [<c01afd8c>] [<c018d21e>]
[<c281a880>] [<c2810000>] [<c2810069>] [<c281a880>] [<c01161a7>]
[<c28100
00>] [<c282b81c>] [<c2810048>]
[<c0107a30>] [<c2810000>]
Code: c7 05 00 00 00 00 00 00 00 00 8d 65 d8 5b 5e 5f 89 ec 5d c3
>>EIP; c01111c2 <schedule+3ae/3c4> <=====
Trace; c0117789 <exit_notify+f5/24c>
Trace; c0117b75 <do_exit+295/29c>
Trace; c0107f1b <die+53/54>
Trace; c010ec78 <do_page_fault+2cc/31c>
Trace; c01b77ee <lk_lockmsg+166e/1740>
Trace; c0107b35 <error_code+2d/34>
Trace; c282b7b0 <END_OF_CODE+25faaac/????>
Trace; c281832d <END_OF_CODE+25e7629/????>
Trace; c28182b0 <END_OF_CODE+25e75ac/????>
Trace; c0112096 <timer_bh+37a/3ec>
Trace; c0118b23 <do_bottom_half+5f/a0>
Trace; c0118b45 <do_bottom_half+81/a0>
Trace; c281004c <END_OF_CODE+25df348/????>
Trace; c01099e2 <do_IRQ+52/5c>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c0107acc <ret_from_intr+0/20>
Trace; c281004c <END_OF_CODE+25df348/????>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c018c9f9 <scsi_register_host+59/264>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c281004c <END_OF_CODE+25df348/????>
Trace; c01afd8c <__generic_copy_from_user+30/40>
Trace; c018d21e <scsi_register_module+2a/5c>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c2810000 <END_OF_CODE+25df2fc/????>
Trace; c2810069 <END_OF_CODE+25df365/????>
Trace; c281a880 <END_OF_CODE+25e9b7c/????>
Trace; c01161a7 <sys_init_module+46b/4ec>
Trace; c2810000 <END_OF_CODE+25df2fc/????>
Trace; c282b81c <END_OF_CODE+25fab18/????>
Trace; c2810048 <END_OF_CODE+25df344/????>
Trace; c0107a30 <system_call+34/38>
Trace; c2810000 <END_OF_CODE+25df2fc/????>
Code; c01111c2 <schedule+3ae/3c4>
00000000 <_EIP>:
Code; c01111c2 <schedule+3ae/3c4> <=====
0: c7 05 00 00 00 00 00 movl $0x0,0x0 <=====
Code; c01111c9 <schedule+3b5/3c4>
7: 00 00 00
Code; c01111cc <schedule+3b8/3c4>
a: 8d 65 d8 lea 0xffffffd8(%ebp),%esp
Code; c01111cf <schedule+3bb/3c4>
d: 5b pop %ebx
Code; c01111d0 <schedule+3bc/3c4>
e: 5e pop %esi
Code; c01111d1 <schedule+3bd/3c4>
f: 5f pop %edi
Code; c01111d2 <schedule+3be/3c4>
10: 89 ec mov %ebp,%esp
Code; c01111d4 <schedule+3c0/3c4>
12: 5d pop %ebp
Code; c01111d5 <schedule+3c1/3c4>
13: c3 ret
Aiee, killing interrupt handler


And this goes on as before.

Also, please note that this module is not loaded during initialization.
I am manually trying to load it using insmod.

Thanks in advance,
Raju

On Sat, Nov 27, 1999 at 02:35:16PM +0530, Raju K V [rajukv@wipinfo.soft.net] wrote:
> hi,
>
> I added the patch (manually, since patch failed).
> But I get a core dump when I do insmod.
> I am listing the gdb output of insmod.
>
> [root@linpqs /home/rajukv/driver]# insmod driver.o
> Segmentation fault
> [root@linpqs /home/rajukv/driver]# gdb insmod
> GNU gdb 4.17.0.4 with Linux/x86 hardware watchpoint and FPU support
> Copyright 1998 Free Software Foundation, Inc.
> GDB 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.
> Type "show copying" to see the conditions.
> There is absolutely no warranty for GDB. Type "show warranty" for details.
> This GDB was configured as "i386-redhat-linux"...
> (gdb) r driver.o
> Starting program: /sbin/insmod driver.o
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x804dac9 in obj_add_symbol (f=0x805d068, name=0x80522f3 "__this_module",
> symidx=4294967295, info=1, secidx=12, value=0, size=76) at obj_common.c:171
> 171 f->local_symtab[symidx] = sym;
> (gdb) b obj_add_symbol
> Breakpoint 1 at 0x804d94d: file obj_common.c, line 94.
> (gdb) r
> The program being debugged has been started already.
> Start it from the beginning? (y or n) y
> Starting program: /sbin/insmod driver.o
>
> Breakpoint 1, obj_add_symbol (f=0x805d068, name=0x80522f3 "__this_module",
> symidx=4294967295, info=1, secidx=12, value=0, size=76) at obj_common.c:94
> 94 unsigned long hash = f->symbol_hash(name) % HASH_BUCKETS;
> (gdb) n
> 95 int n_type = ELFW(ST_TYPE)(info);
> (gdb)
> 96 int n_binding = ELFW(ST_BIND)(info);
> (gdb)
> 98 for (sym = f->symtab[hash]; sym; sym = sym->next)
> (gdb)
> 165 sym = arch_new_symbol();
> (gdb)
> 166 sym->next = f->symtab[hash];
> (gdb)
> 167 f->symtab[hash] = sym;
> (gdb)
> 168 sym->ksymidx = -1;
> (gdb)
> 170 if (ELFW(ST_BIND)(info) == STB_LOCAL)
> (gdb)
> 171 f->local_symtab[symidx] = sym;
> (gdb)
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x804dac9 in obj_add_symbol (f=0x805d068, name=0x80522f3 "__this_module",
> symidx=4294967295, info=1, secidx=12, value=0, size=76) at obj_common.c:171
> 171 f->local_symtab[symidx] = sym;
> (gdb) q
> The program is running. Exit anyway? (y or n) y
>
> insmod -V
> insmod version 2.2.2-pre6
> Usage:
> insmod [-fkmopsvVxXyY] [-o name] [-P prefix] module [[sym=value]...]
>
> module Filename of a loadable kernel module (*.o)
> -f, --force Force loading under wrong kernel version
> -k, --autoclean Make module autoclean-able
> -m, --map Generate load map (so crashes can be traced)
> -n, --noload Don't load, just show
> -o NAME, --name=NAME Set internal module name to NAME
> -p, --poll Poll mode; check if the module matches the
> kernel
> -s, --syslog Report errors via syslog
> -v, --verbose Verbose output
> -L, --lock Prevent simultaneous loads of the same module
> -V, --version Show version
> -x Do not export externs
> -X Do export externs (default)
> -y Do not add ksymoops symbols
> -Y Do add ksymoops symbols (default)
> -P PREFIX
> --prefix=PREFIX Prefix for kernel or module symbols
>
> Thanks in advance,
> Raju
>
> On Sat, Nov 27, 1999 at 04:36:19AM +1100, Keith Owens [kaos@ocs.com.au] wrote:
> > On Fri, 26 Nov 1999 17:57:35 +0530,
> > Raju K V <rajukv@wipinfo.soft.net> wrote:
> > >While loading my SCSI HBA driver with
> > >insmod driver.o
> > >I get the foll never ending Oops+panic. Here is the ksymoops o/p:
> > >No modules in ksyms, skipping objects
> > >EIP: 0010:[<c281832d>]
> > >>>EIP; c281832d <END_OF_CODE+25e7629/????> <=====
> >
> > When modules fail during initialization they are left in limbo. The
> > module is loaded, symbols are stored, dependencies are logged but the
> > kernel refuses to let programs query the module because it is not
> > marked as running yet. Apply this patch against 2.2.10 and you will be
> > able to get symbols for modules that fail during initialization.
> > Reproduce the problem, feed the new log through ksymoops and you should
> > get symbols this time.
> >
> > Index: 10.1/kernel/module.c
> > --- 10.1/kernel/module.c Fri, 05 Feb 1999 09:47:48 +1100 keith (linux-2.2/h/18_module.c 1.1 644)
> > +++ 10.1(w)/kernel/module.c Sat, 27 Nov 1999 04:29:01 +1100 keith (linux-2.2/h/18_module.c 1.1 644)
> > @@ -13,6 +13,7 @@
> > * 0.99.14 version by Jon Tombs <jon@gtex02.us.es>,
> > * Heavily modified by Bjorn Ekwall <bj0rn@blox.se> May 1994 (C)
> > * Rewritten by Richard Henderson <rth@tamu.edu> Dec 1996
> > + * Add MOD_INITIALIZING Keith Owens <kaos@ocs.com.au> Nov 1999
> > *
> > * This source is covered by the GNU GPL, the same as all kernel sources.
> > */
> > @@ -329,16 +330,18 @@
> > put_mod_name(name);
> >
> > /* Initialize the module. */
> > + mod->flags |= MOD_INITIALIZING;
> > atomic_set(&mod->uc.usecount,1);
> > if (mod->init && mod->init() != 0) {
> > atomic_set(&mod->uc.usecount,0);
> > + mod->flags &= ~MOD_INITIALIZING;
> > error = -EBUSY;
> > goto err0;
> > }
> > atomic_dec(&mod->uc.usecount);
> >
> > /* And set it running. */
> > - mod->flags |= MOD_RUNNING;
> > + mod->flags = (mod->flags | MOD_RUNNING) & ~MOD_INITIALIZING;
> > error = 0;
> > goto err0;
> >
> > @@ -462,7 +465,7 @@
> >
> > if (mod == &kernel_module)
> > return -EINVAL;
> > - if ((mod->flags & (MOD_RUNNING | MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > if (put_user(0, ret))
> > return -EFAULT;
> > else
> > @@ -506,7 +509,7 @@
> >
> > if (mod == &kernel_module)
> > return -EINVAL;
> > - if ((mod->flags & (MOD_RUNNING | MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > if (put_user(0, ret))
> > return -EFAULT;
> > else
> > @@ -550,7 +553,7 @@
> > char *strings;
> > unsigned long *vals;
> >
> > - if ((mod->flags & (MOD_RUNNING | MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > if (put_user(0, ret))
> > return -EFAULT;
> > else
> > @@ -716,7 +719,7 @@
> > struct module_symbol *msym;
> > unsigned int j;
> >
> > - if ((mod->flags & (MOD_RUNNING|MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > continue;
> >
> > /* magic: write module info as a pseudo symbol */
> > @@ -865,7 +868,10 @@
> > safe_copy_cstr(" (autoclean)");
> > if (!(mod->flags & MOD_USED_ONCE))
> > safe_copy_cstr(" (unused)");
> > - } else
> > + }
> > + else if (mod->flags & MOD_INITIALIZING)
> > + safe_copy_cstr(" (initializing)");
> > + else
> > safe_copy_cstr(" (uninitialized)");
> >
> > if ((ref = mod->refs) != NULL) {
> > @@ -909,7 +915,7 @@
> > unsigned i;
> > struct module_symbol *sym;
> >
> > - if (!(mod->flags & MOD_RUNNING) || (mod->flags & MOD_DELETED))
> > + if (!MOD_CAN_QUERY(mod))
> > continue;
> >
> > for (i = mod->nsyms, sym = mod->syms; i > 0; --i, ++sym) {
> > @@ -957,7 +963,7 @@
> >
> > for (mp = module_list; mp; mp = mp->next) {
> > if (((modname == NULL) || (strcmp(mp->name, modname) == 0)) &&
> > - (mp->flags & (MOD_RUNNING | MOD_DELETED)) == MOD_RUNNING &&
> > + MOD_CAN_QUERY(mp) &&
> > (mp->nsyms > 0)) {
> > for (i = mp->nsyms, sym = mp->syms;
> > i > 0; --i, ++sym) {
> > Index: 10.1/include/linux/module.h
> > --- 10.1/include/linux/module.h Fri, 05 Feb 1999 09:47:48 +1100 keith (linux-2.2/F/51_module.h 1.1 644)
> > +++ 10.1(w)/include/linux/module.h Sat, 27 Nov 1999 04:29:01 +1100 keith (linux-2.2/F/51_module.h 1.1 644)
> > @@ -101,6 +101,7 @@
> > #define MOD_VISITED 8
> > #define MOD_USED_ONCE 16
> > #define MOD_JUST_FREED 32
> > +#define MOD_INITIALIZING 64
> >
> > /* Values for query_module's which. */
> >
> > @@ -109,6 +110,9 @@
> > #define QM_REFS 3
> > #define QM_SYMBOLS 4
> > #define QM_INFO 5
> > +
> > +/* Can the module be queried? */
> > +#define MOD_CAN_QUERY(mod) (((mod)->flags & (MOD_RUNNING | MOD_INITIALIZING)) && !((mod)->flags & MOD_DELETED))
> >
> > /* When struct module is extended, we must test whether the new member
> > is present in the header received from insmod before we can use it.
> > Index: 10.1/arch/sparc64/kernel/sys_sparc32.c
> > --- 10.1/arch/sparc64/kernel/sys_sparc32.c Mon, 14 Jun 1999 17:28:27 +1000 keith (linux-2.2/r/b/30_sys_sparc3 1.3 644)
> > +++ 10.1(w)/arch/sparc64/kernel/sys_sparc32.c Sat, 27 Nov 1999 04:29:01 +1100 keith (linux-2.2/r/b/30_sys_sparc3 1.3 644)
> > @@ -3034,7 +3034,7 @@
> >
> > if (mod->next == NULL)
> > return -EINVAL;
> > - if ((mod->flags & (MOD_RUNNING | MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > if (put_user(0, ret))
> > return -EFAULT;
> > else
> > @@ -3078,7 +3078,7 @@
> >
> > if (mod->next == NULL)
> > return -EINVAL;
> > - if ((mod->flags & (MOD_RUNNING | MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > if (put_user(0, ret))
> > return -EFAULT;
> > else
> > @@ -3122,7 +3122,7 @@
> > char *strings;
> > unsigned *vals;
> >
> > - if ((mod->flags & (MOD_RUNNING | MOD_DELETED)) != MOD_RUNNING)
> > + if (!MOD_CAN_QUERY(mod))
> > if (put_user(0, ret))
> > return -EFAULT;
> > else

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