On Tue, 19 Jan 2010, Alex Chiang wrote: > > Thats a kfree of an object not allocated with a slab allocator. > > Recovery is easy in such a case: Dont free the object. > > I don't get it. > > static int sr_probe(struct device *dev) > { > /* ... */ > > cd = kzalloc(sizeof(*cd), GFP_KERNEL); > if (!cd) > goto fail; > > /* ... */ > > fail_put: > put_disk(disk); > fail_free: > kfree(cd); > } > > The kfree() is balanced with kzalloc(). Unless the stack trace is > lying to us? cd is pointing for some reason to an object not allocated. This would mean that kzalloc returns such an object(?). Theoretically one could free a statically allocated object using kmem_cache_free() and it would be put on thefreelist. Then it could be returned from kzalloc (all only if debuging is off)... so Could you boot with full debugging? Either switch on CONFIG_SLUB_DEBUG_ON or pass slub_debug on the kernel command line. -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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