linux-kernel - [PATCH] erofs: fix ztailpacking on

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Message-Id: <20220222033118.20540-1-hsiangkao@linux.alibaba.com>
Date:   Tue, 22 Feb 2022 11:31:18 +0800
From:   Gao Xiang <hsiangkao@...ux.alibaba.com>
To:     linux-erofs@...ts.ozlabs.org, Chao Yu <chao@...nel.org>,
        Yue Hu <huyue2@...ong.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Gao Xiang <hsiangkao@...ux.alibaba.com>
Subject: [PATCH] erofs: fix ztailpacking on > 4GiB filesystems

z_idataoff here is an absolute physical offset, so it should use
erofs_off_t (64 bits at least). Otherwise, it'll get trimmed and
cause the decompresion failure.

Fixes: ab92184ff8f1 ("erofs: add on-disk compressed tail-packing inline support")
Signed-off-by: Gao Xiang <hsiangkao@...ux.alibaba.com>
---
 fs/erofs/internal.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
index b8272fb95fd6..5aa2cf2c2f80 100644
--- a/fs/erofs/internal.h
+++ b/fs/erofs/internal.h
@@ -325,7 +325,7 @@ struct erofs_inode {
 			unsigned char  z_algorithmtype[2];
 			unsigned char  z_logical_clusterbits;
 			unsigned long  z_tailextent_headlcn;
-			unsigned int   z_idataoff;
+			erofs_off_t    z_idataoff;
 			unsigned short z_idata_size;
 		};
 #endif	/* CONFIG_EROFS_FS_ZIP */
-- 
2.24.4