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Fri, 31 May 2024 04:08:01 -0700 (PDT) Received: from localhost.localdomain ([121.185.186.233]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f63232e0d2sm13849195ad.40.2024.05.31.04.08.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 31 May 2024 04:08:01 -0700 (PDT) From: Jeongjun Park To: syzbot+13e8cd4926977f8337b6@syzkaller.appspotmail.com Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [jfs?] UBSAN: shift-out-of-bounds in extAlloc (2) Date: Fri, 31 May 2024 20:06:52 +0900 Message-Id: <20240531110652.8845-1-aha310510@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <0000000000002e9eb506178cdd71@google.com> References: <0000000000002e9eb506178cdd71@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit please test shift-out-of-bounds in extAlloc #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master --- fs/jfs/jfs_extent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c index 63d21822d309..7701159422a1 100644 --- a/fs/jfs/jfs_extent.c +++ b/fs/jfs/jfs_extent.c @@ -313,7 +313,7 @@ extBalloc(struct inode *ip, s64 hint, s64 * nblocks, s64 * blkno) */ /* give up if no space left */ - if (bmp->db_maxfreebud == -1) + if (bmp->db_maxfreebud >= 0 && bmp->db_maxfreebud < 63) return -ENOSPC; max = (s64) 1 << bmp->db_maxfreebud; -- 2.34.1