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Fri, 26 Sep 2025 05:58:11 -0700 (PDT) Date: Fri, 26 Sep 2025 05:58:08 -0700 From: Richard Cochran To: I Viswanath Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, linux-kernel-mentees@lists.linux.dev, david.hunter.linux@gmail.com, syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com Subject: Re: [PATCH net v3] ptp: Add a upper bound on max_vclocks Message-ID: References: <20250925155908.5034-1-viswanathiyyappan@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250925155908.5034-1-viswanathiyyappan@gmail.com> On Thu, Sep 25, 2025 at 09:29:08PM +0530, I Viswanath wrote: > syzbot reported WARNING in max_vclocks_store. > > This occurs when the argument max is too large for kcalloc to handle. > > Extend the guard to guard against values that are too large for > kcalloc > > Reported-by: syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com > Closes: https://syzkaller.appspot.com/bug?extid=94d20db923b9f51be0df > Tested-by: syzbot+94d20db923b9f51be0df@syzkaller.appspotmail.com > Fixes: 73f37068d540 ("ptp: support ptp physical/virtual clocks conversion") > Signed-off-by: I Viswanath Acked-by: Richard Cochran