Re: [syzbot] [nilfs?] [mm?] KASAN: slab-use-after-free Read in lru_add_fn

Hillf Danton
2024-06-14T11:42:15Z

On Tue, 11 Jun 2024 11:10:20 -0700
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 83a7eefedc9b Linux 6.10-rc3
> git tree: upstream
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17c645e2980000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 83a7eefedc9b

--- x/mm/truncate.c
+++ y/mm/truncate.c
@@ -418,6 +418,9 @@ void truncate_inode_pages_range(struct a
truncate_folio_batch_exceptionals(mapping, &fbatch, indices);
folio_batch_release(&fbatch);
}
+
+ if (mapping_exiting(mapping))
+ lru_add_drain_all();
}
EXPORT_SYMBOL(truncate_inode_pages_range);

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