The patch titled Subject: mm/vmalloc: fix vbq->free breakage has been added to the -mm mm-hotfixes-unstable branch. Its filename is mm-vmalloc-fix-vbq-free-breakage.patch
This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...
This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------ From: "hailong.liu" hailong.liu@oppo.com Subject: mm/vmalloc: fix vbq->free breakage Date: Thu, 30 May 2024 17:31:08 +0800
The function xa_for_each() in _vm_unmap_aliases() loops through all vbs. However, since commit 062eacf57ad9 ("mm: vmalloc: remove a global vmap_blocks xarray") the vb from xarray may not be on the corresponding CPU vmap_block_queue. Consequently, purge_fragmented_block() might use the wrong vbq->lock to protect the free list, leading to vbq->free breakage.
Link: https://lkml.kernel.org/r/20240530093108.4512-1-hailong.liu@oppo.com Fixes: fc1e0d980037 ("mm/vmalloc: prevent stale TLBs in fully utilized blocks") Signed-off-by: Hailong.Liu liuhailong@oppo.com Reported-by: Guangye Yang guangye.yang@mediatek.com Cc: Barry Song 21cnbao@gmail.com Cc: Christoph Hellwig hch@infradead.org Cc: Gao Xiang xiang@kernel.org Cc: Guangye Yang guangye.yang@mediatek.com Cc: liuhailong liuhailong@oppo.com Cc: Lorenzo Stoakes lstoakes@gmail.com Cc: Uladzislau Rezki (Sony) urezki@gmail.com Cc: Zhaoyang Huang zhaoyang.huang@unisoc.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---
mm/vmalloc.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
--- a/mm/vmalloc.c~mm-vmalloc-fix-vbq-free-breakage +++ a/mm/vmalloc.c @@ -2830,10 +2830,9 @@ static void _vm_unmap_aliases(unsigned l for_each_possible_cpu(cpu) { struct vmap_block_queue *vbq = &per_cpu(vmap_block_queue, cpu); struct vmap_block *vb; - unsigned long idx;
rcu_read_lock(); - xa_for_each(&vbq->vmap_blocks, idx, vb) { + list_for_each_entry_rcu(vb, &vbq->free, free_list) { spin_lock(&vb->lock);
/* _
Patches currently in -mm which might be from hailong.liu@oppo.com are
mm-vmalloc-fix-vbq-free-breakage.patch