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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Yuezhang Mo <Yuezhang.Mo@sony.com>,
	Sungjong Seo <sj1557.seo@samsung.com>,
	Namjae Jeon <linkinjeon@kernel.org>,
	Sasha Levin <sashal@kernel.org>,
	linux-fsdevel@vger.kernel.org
Subject: [PATCH AUTOSEL 5.10 10/11] exfat: fix overflow in sector and cluster conversion
Date: Fri, 23 Dec 2022 20:32:00 -0500	[thread overview]
Message-ID: <20221224013202.393372-10-sashal@kernel.org> (raw)
In-Reply-To: <20221224013202.393372-1-sashal@kernel.org>

From: Yuezhang Mo <Yuezhang.Mo@sony.com>

[ Upstream commit 40306b4d1ba25970dafd53432e8daa5d591ebd99 ]

According to the exFAT specification, there are at most 2^32-11
clusters in a volume. so using 'int' is not enough for cluster
index, the return value type of exfat_sector_to_cluster() should
be 'unsigned int'.

Signed-off-by: Yuezhang Mo <Yuezhang.Mo@sony.com>
Reviewed-by: Sungjong Seo <sj1557.seo@samsung.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/exfat/exfat_fs.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index 0d139c7d150d..5c5ddd4e3a2f 100644
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -373,7 +373,7 @@ static inline sector_t exfat_cluster_to_sector(struct exfat_sb_info *sbi,
 		sbi->data_start_sector;
 }
 
-static inline int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
+static inline unsigned int exfat_sector_to_cluster(struct exfat_sb_info *sbi,
 		sector_t sec)
 {
 	return ((sec - sbi->data_start_sector) >> sbi->sect_per_clus_bits) +
-- 
2.35.1


  parent reply	other threads:[~2022-12-24  1:39 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-24  1:31 [PATCH AUTOSEL 5.10 01/11] kset: fix memory leak when kset_register() returns error Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 02/11] USB: core: Change configuration warnings to notices Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 03/11] usb: gadget: aspeed: fix buffer overflow Sasha Levin
2022-12-24  1:31   ` Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 04/11] usb: gadget: u_ether: Do not make UDC parent of the net device Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 05/11] usb: gadget: f_ecm: Always set current gadget in ecm_bind() Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 06/11] chardev: Fix potential memory leak when cdev_add() failed Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 07/11] usb/usbip: Fix v_recv_cmd_submit() to use PIPE_BULK define Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 08/11] xhci: disable U3 suspended ports in S4 hibernate poweroff_late stage Sasha Levin
2022-12-24  1:31 ` [PATCH AUTOSEL 5.10 09/11] ACPICA: Fix operand resolution Sasha Levin
2022-12-24  1:32 ` Sasha Levin [this message]
2022-12-24  1:32 ` [PATCH AUTOSEL 5.10 11/11] fbdev: smscufx: fix error handling code in ufx_usb_probe Sasha Levin
2022-12-24  1:32   ` Sasha Levin

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