* [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc [not found] <20080514010129.4f672378.akpm@linux-foundation.org> @ 2008-05-14 15:34 ` Kamalesh Babulal 2008-05-14 16:07 ` Paul E. McKenney 0 siblings, 1 reply; 4+ messages in thread From: Kamalesh Babulal @ 2008-05-14 15:34 UTC (permalink / raw) To: Andrew Morton; +Cc: linux-kernel, linuxppc-dev, paulmck, davem, Balbir Singh 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. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc 2008-05-14 15:34 ` [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc Kamalesh Babulal @ 2008-05-14 16:07 ` Paul E. McKenney 2008-05-14 20:05 ` Alexey Dobriyan 0 siblings, 1 reply; 4+ messages in thread From: Paul E. McKenney @ 2008-05-14 16:07 UTC (permalink / raw) To: Kamalesh Babulal Cc: linux-kernel, linuxppc-dev, Andrew Morton, davem, Balbir Singh 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. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc 2008-05-14 16:07 ` Paul E. McKenney @ 2008-05-14 20:05 ` Alexey Dobriyan 2008-05-14 20:32 ` Paul E. McKenney 0 siblings, 1 reply; 4+ messages in thread From: Alexey Dobriyan @ 2008-05-14 20:05 UTC (permalink / raw) To: Paul E. McKenney Cc: linux-kernel, Kamalesh Babulal, linuxppc-dev, Andrew Morton, davem, Balbir Singh On Wed, May 14, 2008 at 09:07:05AM -0700, Paul E. McKenney wrote: > 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? Yes. ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc 2008-05-14 20:05 ` Alexey Dobriyan @ 2008-05-14 20:32 ` Paul E. McKenney 0 siblings, 0 replies; 4+ messages in thread From: Paul E. McKenney @ 2008-05-14 20:32 UTC (permalink / raw) To: Alexey Dobriyan Cc: linux-kernel, Kamalesh Babulal, linuxppc-dev, Andrew Morton, davem, Balbir Singh On Thu, May 15, 2008 at 12:05:46AM +0400, Alexey Dobriyan wrote: > On Wed, May 14, 2008 at 09:07:05AM -0700, Paul E. McKenney wrote: > > 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? > > Yes. OK, am awake now, apologies for my confusion. Not sure -what- state I was in when generating and validating the original... Thanx, Paul ^ permalink raw reply [flat|nested] 4+ messages in thread
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[not found] <20080514010129.4f672378.akpm@linux-foundation.org>
2008-05-14 15:34 ` [BUG] 2.6.26-rc2-mm1 - kernel panic at inet_create() on powerpc Kamalesh Babulal
2008-05-14 16:07 ` Paul E. McKenney
2008-05-14 20:05 ` Alexey Dobriyan
2008-05-14 20:32 ` Paul E. McKenney
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