From mboxrd@z Thu Jan 1 00:00:00 1970 From: catalin.marinas@arm.com (Catalin Marinas) Date: Fri, 24 Oct 2014 11:31:58 +0100 Subject: BPF crash with 3.18-rc1 on arm64 Juno hardware In-Reply-To: References: <54493433.4090703@arm.com> Message-ID: <20141024103158.GB1955@localhost> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Oct 23, 2014 at 06:23:49PM +0100, Z Lim wrote: > On Thu, Oct 23, 2014 at 10:00 AM, Andre Przywara wrote: > > I see a crash with 3.18-rc1 on a Juno board related to bpf_jit (see dump > > below). Userland tries to carry on afterwards, but eventually hangs in > > RCU stalls. > > The kernel has just CONFIG_BPF_JIT enabled, I guess Ubuntu enables this > > automatically if detected. > > When net-next and arm64-next merged in mainline, a silent failure is > introduced due to new enhancements in net/bpf. > This was actually uncovered before 3.18 merge window, and Daniel's > patch to fix this was discussed here [1]. > I see that Catalin has queued up this patch in fixes/core [2]. Indeed. Pull request to Linus will go out later today. -- Catalin