Re: slab: odd BUG on kzalloc

2013-02-19 Thread Dave Jones
On Tue, Feb 19, 2013 at 01:18:25PM -0500, Sasha Levin wrote: > >> [ 169.930103] ---[ end trace 4d135f3def21b4bd ]--- > >> > >> The code translates to the following in fs/pipe.c:alloc_pipe_info : > >> > >> pipe = kzalloc(sizeof(struct pipe_inode_info), GFP_KERNEL); > >> if

Re: slab: odd BUG on kzalloc

2013-02-19 Thread Sasha Levin
On 02/19/2013 01:29 PM, Dave Jones wrote: > On Tue, Feb 19, 2013 at 01:18:25PM -0500, Sasha Levin wrote: > > > >> [ 169.930103] ---[ end trace 4d135f3def21b4bd ]--- > > >> > > >> The code translates to the following in fs/pipe.c:alloc_pipe_info : > > >> > > >> pipe =

Re: slab: odd BUG on kzalloc

2013-02-19 Thread Sasha Levin
On 02/18/2013 07:35 PM, Christoph Lameter wrote: > Maybe the result of free pointer corruption due to writing to an object > after free. Please run again with slub_debug specified on the commandline > to get detailed reports on how this came about. > > On Sun, 17 Feb 2013, Sasha Levin wrote: >

Re: slab: odd BUG on kzalloc

2013-02-19 Thread Sasha Levin
On 02/18/2013 07:35 PM, Christoph Lameter wrote: Maybe the result of free pointer corruption due to writing to an object after free. Please run again with slub_debug specified on the commandline to get detailed reports on how this came about. On Sun, 17 Feb 2013, Sasha Levin wrote: Hi

Re: slab: odd BUG on kzalloc

2013-02-19 Thread Sasha Levin
On 02/19/2013 01:29 PM, Dave Jones wrote: On Tue, Feb 19, 2013 at 01:18:25PM -0500, Sasha Levin wrote: [ 169.930103] ---[ end trace 4d135f3def21b4bd ]--- The code translates to the following in fs/pipe.c:alloc_pipe_info : pipe = kzalloc(sizeof(struct

Re: slab: odd BUG on kzalloc

2013-02-19 Thread Dave Jones
On Tue, Feb 19, 2013 at 01:18:25PM -0500, Sasha Levin wrote: [ 169.930103] ---[ end trace 4d135f3def21b4bd ]--- The code translates to the following in fs/pipe.c:alloc_pipe_info : pipe = kzalloc(sizeof(struct pipe_inode_info), GFP_KERNEL); if (pipe) {

Re: slab: odd BUG on kzalloc

2013-02-18 Thread Christoph Lameter
Maybe the result of free pointer corruption due to writing to an object after free. Please run again with slub_debug specified on the commandline to get detailed reports on how this came about. On Sun, 17 Feb 2013, Sasha Levin wrote: > Hi all, > > I was fuzzing with trinity inside a KVM tools

Re: slab: odd BUG on kzalloc

2013-02-18 Thread Christoph Lameter
Maybe the result of free pointer corruption due to writing to an object after free. Please run again with slub_debug specified on the commandline to get detailed reports on how this came about. On Sun, 17 Feb 2013, Sasha Levin wrote: Hi all, I was fuzzing with trinity inside a KVM tools

slab: odd BUG on kzalloc

2013-02-17 Thread Sasha Levin
Hi all, I was fuzzing with trinity inside a KVM tools guest, running latest -next kernel, and hit the following bug: [ 169.773688] BUG: unable to handle kernel NULL pointer dereference at 0001 [ 169.774976] IP: [] memset+0x1f/0xb0 [ 169.775989] PGD 93e02067 PUD ac1a2067 PMD 0 [

slab: odd BUG on kzalloc

2013-02-17 Thread Sasha Levin
Hi all, I was fuzzing with trinity inside a KVM tools guest, running latest -next kernel, and hit the following bug: [ 169.773688] BUG: unable to handle kernel NULL pointer dereference at 0001 [ 169.774976] IP: [81a15c2f] memset+0x1f/0xb0 [ 169.775989] PGD 93e02067 PUD