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ovl: fix error handling in ovl_verify_set_fh()
commitbabf4770be
upstream. We hit a BUG on kfree of an ERR_PTR()... Reported-by: syzbot+ff03fe05c717b82502d0@syzkaller.appspotmail.com Fixes:8b88a2e640
("ovl: verify upper root dir matches lower root dir") Cc: <stable@vger.kernel.org> # v4.13 Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 3 additions and 1 deletions
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@ -368,8 +368,10 @@ int ovl_verify_origin(struct dentry *dentry, struct vfsmount *mnt,
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fh = ovl_encode_fh(origin, is_upper);
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err = PTR_ERR(fh);
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if (IS_ERR(fh))
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if (IS_ERR(fh)) {
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fh = NULL;
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goto fail;
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}
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err = ovl_verify_origin_fh(dentry, fh);
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if (set && err == -ENODATA)
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