8550be08cb
In the case that a cpu is taken offline before zcache_do_preload() is ever called on the cpu, the per-cpu zcache_preloads structure will be uninitialized. In the CPU_DEAD case for zcache_cpu_notifier(), kp->obj is not checked before calling kmem_cache_free() on it. If it is NULL, a crash results. This patch ensures that both kp->obj and kp->page are not NULL before calling the respective free functions. In practice, just checking one or the other should be sufficient since they are assigned together in zcache_do_preload(), but I check both for safety. Signed-off-by: Seth Jennings <sjenning@linux.vnet.ibm.com> Acked-by: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> |
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| .. | ||
| Kconfig | ||
| Makefile | ||
| tmem.c | ||
| tmem.h | ||
| zcache-main.c | ||