Hi Andrew,
2.6.26-rc2-mm1 kernel panics on powerpc, while running ltp test over it.
I have attached the gdb output of the pc and lr registers. The patch
list_for_each_rcu-must-die-networking.patch points to changes made
to the same lines listed by the gdb output.
Unable to handle kernel paging request for data at address 0x00000000
Faulting instruction address: 0xc000000000481fa0
cpu 0x0: Vector: 300 (Data Access) at [c0000000eae37900]
pc: c000000000481fa0: .inet_create+0xb4/0x330
lr: c000000000413340: .__sock_create+0x190/0x280
sp: c0000000eae37b80
msr: 8000000000009032
dar: 0
dsisr: 40010000
current = 0xc0000000cd201500
paca = 0xc0000000007c3480
pid = 6462, comm = socket01
enter ? for help
[c0000000eae37c30] c000000000413340 .__sock_create+0x190/0x280
[c0000000eae37cf0] c0000000004137e0 .sys_socket+0x40/0x98
[c0000000eae37d90] c000000000438e18 .compat_sys_socketcall+0xc0/0x234
[c0000000eae37e30] c0000000000086b4 syscall_exit+0x0/0x40
--- Exception: c01 (System Call) at 000000000ff20484
SP (ffc8f770) is in userspace
0xc000000000481fa0 is in inet_create (net/ipv4/af_inet.c:290).
285 /* Look for the requested type/protocol pair. */
286 answer = NULL;
287 lookup_protocol:
288 err = -ESOCKTNOSUPPORT;
289 rcu_read_lock();
290 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
291
292 /* Check the non-wild match. */
293 if (protocol == answer->protocol) {
294 if (protocol != IPPROTO_IP)
0xc000000000413340 is in __sock_create (net/socket.c:1171).
1166 goto out_release;
1167
1168 /* Now protected by module ref count */
1169 rcu_read_unlock();
1170
1171 err = pf->create(net, sock, protocol);
1172 if (err < 0)
1173 goto out_module_put;
1174
1175 /*
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
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