On 2018/9/27 23:46, Greg KH wrote: > On Thu, Sep 27, 2018 at 10:43:40PM +0800, zhong jiang wrote: >> From: Alexey Dobriyan <adobriyan@xxxxxxxxx> >> >> /* >> * cpu_partial determined the maximum number of objects >> * kept in the per cpu partial lists of a processor. >> */ >> >> Can't be negative. >> >> I hit a real issue that it will result in a large number of memory leak. >> Because Freeing slabs are in interrupt context. So it can trigger this issue. >> put_cpu_partial can be interrupted more than once. >> due to a union struct of lru and pobjects in struct page, when other core handles >> page->lru list, for eaxmple, remove_partial in freeing slab code flow, It will >> result in pobjects being a negative value(0xdead0000). Therefore, a large number >> of slabs will be added to per_cpu partial list. >> >> I had posted the issue to community before. The detailed issue description is as follows. >> >> Link: https://www.spinics.net/lists/kernel/msg2870979.html >> >> After applying the patch, The issue is fixed. So the patch is a effective bugfix. >> It should go into stable. > <formletter> > > This is not the correct way to submit patches for inclusion in the > stable kernel tree. Please read: > https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html > for how to do this properly. > > </formletter> Will resend with proper format. Thanks, zhong jiang
