Linux-stable-mirror June 2024

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[to-be-updated] mm-vmalloc-fix-vbq-free-breakage.patch removed from -mm tree

by Andrew Morton

The quilt patch titled Subject: mm/vmalloc: fix vbq->free breakage has been removed from the -mm tree. Its filename was mm-vmalloc-fix-vbq-free-breakage.patch This patch was dropped because an updated version will be merged ------------------------------------------------------ From: "hailong.liu" <hailong.liu(a)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(a)oppo.com> Reported-by: Guangye Yang <guangye.yang(a)mediatek.com> Cc: Barry Song <21cnbao(a)gmail.com> Cc: Christoph Hellwig <hch(a)infradead.org> Cc: Gao Xiang <xiang(a)kernel.org> Cc: Guangye Yang <guangye.yang(a)mediatek.com> Cc: liuhailong <liuhailong(a)oppo.com> Cc: Lorenzo Stoakes <lstoakes(a)gmail.com> Cc: Uladzislau Rezki (Sony) <urezki(a)gmail.com> Cc: Zhaoyang Huang <zhaoyang.huang(a)unisoc.com> Cc: <stable(a)vger.kernel.org> Signed-off-by: Andrew Morton <akpm(a)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(a)oppo.com are

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Linux-stable-mirror June 2024