From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 729146D00 for ; Tue, 15 Jun 2021 12:47:55 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id EDF221063; Tue, 15 Jun 2021 05:47:54 -0700 (PDT) Received: from C02TD0UTHF1T.local (unknown [10.57.9.115]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 5A4D43F719; Tue, 15 Jun 2021 05:47:51 -0700 (PDT) Date: Tue, 15 Jun 2021 13:47:45 +0100 From: Mark Rutland To: Naresh Kamboju Cc: Linux-Next Mailing List , linux-mm , Linux ARM , open list , Will Deacon , lkft-triage@lists.linaro.org, regressions@lists.linux.dev, Andrew Morton , Stephen Rothwell , Arnd Bergmann , Ard Biesheuvel , Catalin Marinas , Mike Rapoport , Christophe Leroy , Miles Chen Subject: Re: [next] [arm64] kernel BUG at arch/arm64/mm/physaddr.c Message-ID: <20210615124745.GA47121@C02TD0UTHF1T.local> References: X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Jun 15, 2021 at 04:41:25PM +0530, Naresh Kamboju wrote: > Following kernel crash reported while boot linux next 20210615 tag on qemu_arm64 > with allmodconfig build. > > [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034] > [ 0.000000] Linux version 5.13.0-rc6-next-20210615 > (tuxmake@ac7978cddede) (aarch64-linux-gnu-gcc (Debian 11.1.0-1) > 11.1.0, GNU ld (GNU Binutils for Debian) 2.36.50.20210601) #1 SMP > PREEMPT Tue Jun 15 10:20:51 UTC 2021 > [ 0.000000] Machine model: linux,dummy-virt > [ 0.000000] earlycon: pl11 at MMIO 0x0000000009000000 (options '') > [ 0.000000] printk: bootconsole [pl11] enabled > [ 0.000000] efi: UEFI not found. > [ 0.000000] NUMA: No NUMA configuration found > [ 0.000000] NUMA: Faking a node at [mem > 0x0000000040000000-0x00000000bfffffff] > [ 0.000000] NUMA: NODE_DATA [mem 0xbfc00d40-0xbfc03fff] > [ 0.000000] ------------[ cut here ]------------ > [ 0.000000] kernel BUG at arch/arm64/mm/physaddr.c:27! > [ 0.000000] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP > [ 0.000000] Modules linked in: > [ 0.000000] CPU: 0 PID: 0 Comm: swapper Tainted: G T > 5.13.0-rc6-next-20210615 #1 c150a8161d8ff395c5ae7ee0c3c8f22c3689fae4 > [ 0.000000] Hardware name: linux,dummy-virt (DT) > [ 0.000000] pstate: 404000c5 (nZcv daIF +PAN -UAO -TCO BTYPE=--) > [ 0.000000] pc : __phys_addr_symbol+0x44/0xc0 > [ 0.000000] lr : __phys_addr_symbol+0x44/0xc0 > [ 0.000000] sp : ffff800014287b00 > [ 0.000000] x29: ffff800014287b00 x28: fc49a9b89db36f0a x27: ffffffffffffffff > [ 0.000000] x26: 0000000000000280 x25: 0000000000000010 x24: ffff8000145a8000 > [ 0.000000] x23: 0000000008000000 x22: 0000000000000010 x21: 0000000000000000 > [ 0.000000] x20: ffff800010000000 x19: ffff00007fc00d40 x18: 0000000000000000 > [ 0.000000] x17: 00000000003ee000 x16: 00000000bfc12000 x15: 0000001000000000 > [ 0.000000] x14: 000000000000de8c x13: 0000001000000000 x12: 00000000f1f1f1f1 > [ 0.000000] x11: dfff800000000000 x10: ffff700002850eea x9 : 0000000000000000 > [ 0.000000] x8 : ffff00007fbe0d40 x7 : 0000000000000000 x6 : 000000000000003f > [ 0.000000] x5 : 0000000000000040 x4 : 0000000000000005 x3 : ffff8000142bb0c0 > [ 0.000000] x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000000 > [ 0.000000] Call trace: > [ 0.000000] __phys_addr_symbol+0x44/0xc0 > [ 0.000000] sparse_init_nid+0x98/0x6d0 >From the looks of it, this is pgdat_to_phys, as introduced in next commit: e1db6ef7336d817c ("mm/sparse: fix check_usemap_section_nr warnings") It appears thta allmodconfig doesn't have CONFIG_NEED_MULTIPLE_NODES=y, but does have CONFIG_NUMA=y, and so *does* use the dynamically-allocated node_data array (since contig_page_data is only defined for !NUMA). I don't think that commit is correct. Thanks, Mark. > [ 0.000000] sparse_init+0x460/0x4d4 > [ 0.000000] bootmem_init+0x110/0x340 > [ 0.000000] setup_arch+0x1b8/0x2e0 > [ 0.000000] start_kernel+0x110/0x870 > [ 0.000000] __primary_switched+0xa8/0xb0 > [ 0.000000] Code: 940ccf23 eb13029f 54000069 940cce60 (d4210000) > [ 0.000000] random: get_random_bytes called from > oops_exit+0x54/0xc0 with crng_init=0 > [ 0.000000] ---[ end trace 0000000000000000 ]--- > [ 0.000000] Kernel panic - not syncing: Oops - BUG: Fatal exception > [ 0.000000] ---[ end Kernel panic - not syncing: Oops - BUG: Fatal > exception ]--- > > Reported-by: Naresh Kamboju > > -- > Linaro LKFT > https://lkft.linaro.org