linux-kernel - Re: [syzbot] [bcachefs?] KASAN: slab-out-of-bounds Read in bch2_sb_clean_to

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Message-ID: <tencent_456D1097D0EAEAEEAACDD47B526E602F910A@qq.com>
Date: Tue,  7 May 2024 10:13:02 +0800
From: Edward Adam Davis <eadavis@...com>
To: syzbot+c48865e11e7e893ec4ab@...kaller.appspotmail.com
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bcachefs?] KASAN: slab-out-of-bounds Read in bch2_sb_clean_to_text

please test oob in bch2_sb_clean_to_text

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 5eb4573ea63d

diff --git a/fs/bcachefs/sb-clean.c b/fs/bcachefs/sb-clean.c
index 5980ba2563fe..02101687853e 100644
--- a/fs/bcachefs/sb-clean.c
+++ b/fs/bcachefs/sb-clean.c
@@ -285,7 +285,7 @@ static void bch2_sb_clean_to_text(struct printbuf *out, struct bch_sb *sb,
 	prt_newline(out);
 
 	for (entry = clean->start;
-	     entry != vstruct_end(&clean->field);
+	     entry < vstruct_end(&clean->field);
 	     entry = vstruct_next(entry)) {
 		if (entry->type == BCH_JSET_ENTRY_btree_keys &&
 		    !entry->u64s)