5.4-stable review patch. If anyone has any objections, please let me know.
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From: Lizhi Xu lizhi.xu@windriver.com
[ Upstream commit 2d91b3765cd05016335cd5df5e5c6a29708ec058 ]
The fileset value of the inode copy from the disk by the reproducer is AGGR_RESERVED_I. When executing evict, its hard link number is 0, so its inode pages are not truncated. This causes the bugon to be triggered when executing clear_inode() because nrpages is greater than 0.
Reported-by: syzbot+6e516bb515d93230bc7b@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=6e516bb515d93230bc7b Signed-off-by: Lizhi Xu lizhi.xu@windriver.com Signed-off-by: Dave Kleikamp dave.kleikamp@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/jfs/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c index 62c4a5450cda..6d353fbe67c0 100644 --- a/fs/jfs/inode.c +++ b/fs/jfs/inode.c @@ -145,9 +145,9 @@ void jfs_evict_inode(struct inode *inode) if (!inode->i_nlink && !is_bad_inode(inode)) { dquot_initialize(inode);
+ truncate_inode_pages_final(&inode->i_data); if (JFS_IP(inode)->fileset == FILESYSTEM_I) { struct inode *ipimap = JFS_SBI(inode->i_sb)->ipimap; - truncate_inode_pages_final(&inode->i_data);
if (test_cflag(COMMIT_Freewmap, inode)) jfs_free_zero_link(inode);