This is a note to let you know that I've just added the patch titled
exfat: fix erroneous discard when clear cluster bit
to the 5.12-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
exfat-fix-erroneous-discard-when-clear-cluster-bit.patch
and it can be found in the queue-5.12 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 77edfc6e51055b61cae2f54c8e6c3bb7c762e4fe Mon Sep 17 00:00:00 2001
From: Hyeongseok Kim <hyeongseok@xxxxxxxxx>
Date: Thu, 4 Mar 2021 09:15:34 +0900
Subject: exfat: fix erroneous discard when clear cluster bit
From: Hyeongseok Kim <hyeongseok@xxxxxxxxx>
commit 77edfc6e51055b61cae2f54c8e6c3bb7c762e4fe upstream.
If mounted with discard option, exFAT issues discard command when clear
cluster bit to remove file. But the input parameter of cluster-to-sector
calculation is abnormally added by reserved cluster size which is 2,
leading to discard unrelated sectors included in target+2 cluster.
With fixing this, remove the wrong comments in set/clear/find bitmap
functions.
Fixes: 1e49a94cf707 ("exfat: add bitmap operations")
Cc: stable@xxxxxxxxxxxxxxx # v5.7+
Signed-off-by: Hyeongseok Kim <hyeongseok@xxxxxxxxx>
Acked-by: Sungjong Seo <sj1557.seo@xxxxxxxxxxx>
Signed-off-by: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/exfat/balloc.c | 11 +----------
1 file changed, 1 insertion(+), 10 deletions(-)
--- a/fs/exfat/balloc.c
+++ b/fs/exfat/balloc.c
@@ -141,10 +141,6 @@ void exfat_free_bitmap(struct exfat_sb_i
kfree(sbi->vol_amap);
}
-/*
- * If the value of "clu" is 0, it means cluster 2 which is the first cluster of
- * the cluster heap.
- */
int exfat_set_bitmap(struct inode *inode, unsigned int clu)
{
int i, b;
@@ -162,10 +158,6 @@ int exfat_set_bitmap(struct inode *inode
return 0;
}
-/*
- * If the value of "clu" is 0, it means cluster 2 which is the first cluster of
- * the cluster heap.
- */
void exfat_clear_bitmap(struct inode *inode, unsigned int clu, bool sync)
{
int i, b;
@@ -186,8 +178,7 @@ void exfat_clear_bitmap(struct inode *in
int ret_discard;
ret_discard = sb_issue_discard(sb,
- exfat_cluster_to_sector(sbi, clu +
- EXFAT_RESERVED_CLUSTERS),
+ exfat_cluster_to_sector(sbi, clu),
(1 << sbi->sect_per_clus_bits), GFP_NOFS, 0);
if (ret_discard == -EOPNOTSUPP) {
Patches currently in stable-queue which might be from hyeongseok@xxxxxxxxx are
queue-5.12/exfat-fix-erroneous-discard-when-clear-cluster-bit.patch
