On Wed, May 14, 2008 at 09:04:07PM +0530, Kamalesh Babulal wrote: > 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.
Hmmm.... Does the panic go away when this patch is reverted? Thanx, Paul > 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. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev