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* [PATCH AUTOSEL 5.15 01/23] ext4: avoid dividing by 0 in mb_update_avg_fragment_size() when block bitmap corrupt
@ 2024-02-07 21:25 Sasha Levin
  2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 02/23] ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found() Sasha Levin
                   ` (21 more replies)
  0 siblings, 22 replies; 23+ messages in thread
From: Sasha Levin @ 2024-02-07 21:25 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Baokun Li, Jan Kara, Theodore Ts'o, Sasha Levin,
	adilger.kernel, linux-ext4

From: Baokun Li <libaokun1@huawei.com>

[ Upstream commit 993bf0f4c393b3667830918f9247438a8f6fdb5b ]

Determine if bb_fragments is 0 instead of determining bb_free to eliminate
the risk of dividing by zero when the block bitmap is corrupted.

Signed-off-by: Baokun Li <libaokun1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20240104142040.2835097-6-libaokun1@huawei.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/ext4/mballoc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e44c28ceb9cd..3df3c3894f7b 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -853,7 +853,7 @@ mb_update_avg_fragment_size(struct super_block *sb, struct ext4_group_info *grp)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(sb);
 
-	if (!test_opt2(sb, MB_OPTIMIZE_SCAN) || grp->bb_free == 0)
+	if (!test_opt2(sb, MB_OPTIMIZE_SCAN) || grp->bb_fragments == 0)
 		return;
 
 	write_lock(&sbi->s_mb_rb_lock);
-- 
2.43.0


^ permalink raw reply related	[flat|nested] 23+ messages in thread

end of thread, other threads:[~2024-02-07 21:26 UTC | newest]

Thread overview: 23+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-02-07 21:25 [PATCH AUTOSEL 5.15 01/23] ext4: avoid dividing by 0 in mb_update_avg_fragment_size() when block bitmap corrupt Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 02/23] ext4: avoid allocating blocks from corrupted group in ext4_mb_try_best_found() Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 03/23] ext4: avoid allocating blocks from corrupted group in ext4_mb_find_by_goal() Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 04/23] dmaengine: ti: edma: Add some null pointer checks to the edma_probe Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 05/23] ASoC: codecs: wcd934x: drop unneeded regulator include Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 06/23] regulator: pwm-regulator: Add validity checks in continuous .get_voltage Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 07/23] nvmet-tcp: fix nvme tcp ida memory leak Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 08/23] ALSA: usb-audio: Check presence of valid altsetting control Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 09/23] ASoC: sunxi: sun4i-spdif: Add support for Allwinner H616 Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 10/23] spi: sh-msiof: avoid integer overflow in constants Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 11/23] Input: xpad - add Lenovo Legion Go controllers Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 12/23] netfilter: conntrack: check SCTP_CID_SHUTDOWN_ACK for vtag setting in sctp_new Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 13/23] ALSA: usb-audio: Ignore clock selector errors for single connection Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 14/23] nvme-fc: do not wait in vain when unloading module Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 15/23] nvmet-fcloop: swap the list_add_tail arguments Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 16/23] nvmet-fc: release reference on target port Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 17/23] nvmet-fc: defer cleanup using RCU properly Sasha Levin
2024-02-07 21:25 ` [PATCH AUTOSEL 5.15 18/23] nvmet-fc: hold reference on hostport match Sasha Levin
2024-02-07 21:26 ` [PATCH AUTOSEL 5.15 19/23] nvmet-fc: abort command when there is no binding Sasha Levin
2024-02-07 21:26 ` [PATCH AUTOSEL 5.15 20/23] nvmet-fc: avoid deadlock on delete association path Sasha Levin
2024-02-07 21:26 ` [PATCH AUTOSEL 5.15 21/23] nvmet-fc: take ref count on tgtport before delete assoc Sasha Levin
2024-02-07 21:26 ` [PATCH AUTOSEL 5.15 22/23] ext4: correct the hole length returned by ext4_map_blocks() Sasha Levin
2024-02-07 21:26 ` [PATCH AUTOSEL 5.15 23/23] Input: i8042 - add Fujitsu Lifebook U728 to i8042 quirk table Sasha Levin

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