From: Jeongjun Park <aha310510@gmail.com>
To: syzbot+2e22057de05b9f3b30d8@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [nilfs?] UBSAN: array-index-out-of-bounds in nilfs_add_link
Date: Mon, 15 Apr 2024 22:28:28 +0900 [thread overview]
Message-ID: <20240415132828.149954-1-aha310510@gmail.com> (raw)
In-Reply-To: <000000000000209c9506161fd1d4@google.com>
please test array-index-out-of-bounds in nilfs_add_link
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 0bbac3facb5d
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index bc846b904b68..aee40db7a036 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -240,7 +240,7 @@ nilfs_filetype_table[NILFS_FT_MAX] = {
#define S_SHIFT 12
static unsigned char
-nilfs_type_by_mode[S_IFMT >> S_SHIFT] = {
+nilfs_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
[S_IFREG >> S_SHIFT] = NILFS_FT_REG_FILE,
[S_IFDIR >> S_SHIFT] = NILFS_FT_DIR,
[S_IFCHR >> S_SHIFT] = NILFS_FT_CHRDEV,
--
next prev parent reply other threads:[~2024-04-15 13:28 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-15 10:09 syzbot
2024-04-15 13:28 ` Jeongjun Park [this message]
2024-04-15 14:48 ` Ryusuke Konishi
2024-04-15 15:00 ` syzbot
2024-04-15 18:20 ` [PATCH] nilfs2: Fix OOB in nilfs_set_de_type Ryusuke Konishi
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