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SubjectRe: [2.6.32-rc3 kmemleak] WARNING: at kernel/lockdep.c:3161check_flags+0xbe/0x180()
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Date
Catalin Marinas wrote:
> On Thu, 2009-10-08 at 21:34 +0900, Tetsuo Handa wrote:
> > If the stack dump is correct, this error indicates circular function calls.
> > We need to find the location which triggers circular memory allocation.
> > Maybe just checking for NULL is not sufficient.
>
> The circular function call is expected, nothing to do with the NULL
> checking. You get callbacks from the slab allocator into kmemleak which
> also allocates memory (but this latter call isn't traced - similar
> behaviour in kmemtrace).
So, something is preventing kmemleak from being traced, isn't it?
I tried 2.6.32-rc4 , but the error is not yet fixed. How can I help you?

[ 0.000000] Linux version 2.6.32-rc4 (root@tomoyo) (gcc version 3.3.5 (Debian 1:3.3.5-13)) #2 SMP Tue Oct 13 11:10:53 JST 2009
(...snipped...)
[ 0.000000] -------------------------------------------------------
[ 0.000000] Good, all 218 testcases passed! |
[ 0.000000] ---------------------------------
[ 0.000000] ------------[ cut here ]------------
[ 0.000000] WARNING: at kernel/lockdep.c:3161 check_flags+0xbe/0x180()
[ 0.000000] Hardware name: VMware Virtual Platform
[ 0.000000] Modules linked in:
[ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.32-rc4 #2
[ 0.000000] Call Trace:
[ 0.000000] [<c10417dd>] ? printk+0x1d/0x30
[ 0.000000] [<c10703ae>] ? check_flags+0xbe/0x180
[ 0.000000] [<c1040d91>] warn_slowpath_common+0x81/0xa0
[ 0.000000] [<c10703ae>] ? check_flags+0xbe/0x180
[ 0.000000] [<c1040e0a>] warn_slowpath_null+0x1a/0x30
[ 0.000000] [<c10703ae>] check_flags+0xbe/0x180
[ 0.000000] [<c106e23e>] lockdep_trace_alloc+0x2e/0x60
[ 0.000000] [<c10cfded>] kmem_cache_alloc+0x2d/0x1d0
[ 0.000000] [<c106e00b>] ? trace_hardirqs_off+0xb/0x10
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cf8d4>] ? cache_alloc_refill+0x144/0x210
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10ceeaf>] alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cf2ee>] cache_grow+0xae/0x170
[ 0.000000] [<c10cf90b>] cache_alloc_refill+0x17b/0x210
[ 0.000000] [<c10cff6a>] kmem_cache_alloc+0x1aa/0x1d0
[ 0.000000] [<c10cd8c8>] ? obj_size+0x8/0x10
[ 0.000000] [<c10d3879>] ? create_object+0x29/0x220
[ 0.000000] [<c10d3879>] create_object+0x29/0x220
[ 0.000000] [<c10cd8b8>] ? obj_offset+0x8/0x10
[ 0.000000] [<c10cdf8a>] ? poison_obj+0x2a/0x50
[ 0.000000] [<c1321613>] kmemleak_alloc+0x83/0xd0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] [<c10cff45>] kmem_cache_alloc+0x185/0x1d0
[ 0.000000] [<c10ceeaf>] ? alloc_slabmgmt+0x5f/0x80
[ 0.000000] <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> <IRQ> (...snipped...)


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