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Re: [lkp] [vfs] b413afd673: kernel BUG at arch/x86/mm/physaddr.c:26!

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  Re: [lkp] [vfs] b413afd673: kernel BUG at arch/x86/mm/physaddr.c:26! Al Viro <viro@ZenIV.linux.org.uk> - 2016-04-19 04:50 +0200

#1382136 — Re: [lkp] [vfs] b413afd673: kernel BUG at arch/x86/mm/physaddr.c:26!

On Tue, Apr 19, 2016 at 08:45:48AM +0800, kernel test robot wrote:
> Hi,
> 
> Here is the test result for T3.
> 
> FYI, we noticed the below changes on
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git T3
> commit b413afd67397cfc175a9656fc9e0444597a753e0 ("i_dir_seq (__d_add() only, with sanity checks for dir)")

Oh, I see...  Try to add this (to be folded into the commit in original
branch):

diff --git a/mm/shmem.c b/mm/shmem.c
index 00d5d02..50447e6 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -3123,7 +3123,8 @@ static struct inode *shmem_alloc_inode(struct super_block *sb)
 static void shmem_destroy_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kfree(inode->i_link);
+	if (S_ISLNK(inode->i_mode))
+		kfree(inode->i_link);
 	kmem_cache_free(shmem_inode_cachep, SHMEM_I(inode));
 }
 

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