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Fri, 9 Feb 2024 16:06:56 +1100 (AEDT) Date: Fri, 9 Feb 2024 16:06:54 +1100 From: Stephen Rothwell To: Andrew Morton Cc: Sourav Panda , Linux Kernel Mailing List , Linux Next Mailing List Subject: linux-next: boot failure after merge of the mm tree Message-ID: <20240209160654.498f39b5@canb.auug.org.au> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_/Tiozr0emFyu5ajXK1ul1jC7"; protocol="application/pgp-signature"; micalg=pgp-sha256 --Sig_/Tiozr0emFyu5ajXK1ul1jC7 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hi all, After merging the mm tree, today's linux-next boot (powerpc pseries_le_defconfig) failed like this: numa: NODE_DATA [mem 0x7ffd8800-0x7ffdffff] BUG: Kernel NULL pointer dereference at 0x00000030 Faulting instruction address: 0xc00000000045322c Oops: Kernel access of bad area, sig: 11 [#1] LE PAGE_SIZE=3D64K MMU=3DHash SMP NR_CPUS=3D2048 NUMA pSeries Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 6.8.0-rc3-05899-ga19e02faed6b #1 Hardware name: IBM pSeries (emulated by qemu) POWER8 (raw) 0x4d0200 0xf0000= 04 of:SLOF,HEAD pSeries NIP: c00000000045322c LR: c00000000045332c CTR: c0000000000e72c0 REGS: c00000000292f8e0 TRAP: 0380 Not tainted (6.8.0-rc3-05899-ga19e02fa= ed6b) MSR: 8000000000001033 CR: 48004888 XER: 20000000 CFAR: c000000000453328 IRQMASK: 1=20 GPR00: c0000000011d4688 c00000000292fb80 c0000000015c9900 c00000007ffd8800= =20 GPR04: 000000000000002f 0000000000000001 40066bdea7000015 0000000000000000= =20 GPR08: 0000000000000000 0000000000000030 0000000000000030 0000000000004000= =20 GPR12: c00000000292f968 c000000002b60000 0000000080000000 0000000000000004= =20 GPR16: 0000000000000004 0000000000000060 0000000000000002 00000000017d2358= =20 GPR20: 0000000000000000 0000000000000000 0000000008000000 c00c000000004000= =20 GPR24: 0000000000000000 c0000000029d0260 0000000000000000 0000000000000000= =20 GPR28: c00c000000000000 0000000000000000 0000000000004000 0000000000000001= =20 NIP [c00000000045322c] __mod_node_page_state+0x30/0x100 LR [c00000000045332c] mod_node_page_state+0x30/0x50 Call Trace: [c00000000292fb80] [c00c000000000000] 0xc00c000000000000 (unreliable) [c00000000292fbb0] [c0000000011d4688] __populate_section_memmap+0x10c/0x1b4 [c00000000292fc20] [c000000002060e20] sparse_init_nid+0x210/0x7e0 [c00000000292fcf0] [c0000000020618d4] sparse_init+0x3c4/0x5f0 [c00000000292fdc0] [c00000000202185c] initmem_init+0x1d4/0x278 [c00000000292fea0] [c00000000200d774] setup_arch+0x4fc/0x618 [c00000000292ff30] [c000000002004ee0] start_kernel+0x9c/0x8cc [c00000000292ffe0] [c00000000000e99c] start_here_common+0x1c/0x20 Code: 3c4c0117 38426704 60000000 60000000 e9037600 3924fffb 28090001 394800= 01 7d4a2214 40810040 e8ed0030 7d495378 <7d2748ae> 7d0740ae 7d290774 7d08077= 4=20 ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Attempted to kill the idle task! Bisected to commit a1a91b2f3883 ("mm: report per-page metadata information") =46rom the mm-unstable branch of the mm tree. I reverted that commit for today. --=20 Cheers, Stephen Rothwell --Sig_/Tiozr0emFyu5ajXK1ul1jC7 Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEENIC96giZ81tWdLgKAVBC80lX0GwFAmXFsu4ACgkQAVBC80lX 0GwfFgf/eAVD2x3Jbmy7Fb5XYnE7N6MMQ4yFgynJkNewpQkgVWh1ZhyBh828dTDV Nd4SJn2Aau604NeRx9X79mh2vclhyISbV9gMXfNK0T+qqUsw6pg+0DgxxGlSKH9a EPF2XWW/2eYctmabD700fLlmUGy/0YkWzUEHu1EHg/Pwbd05GRvi5tH6IMi5hIZv EM2fPY5DwbdZAsJPI7MMcPq6NJLGbw+q7QJNEbXKg35Y59SKwj+jFjGuirB2FyrR cgCy9ubGvjSDX6VsCKlmW1DQqU+uVQ6i1NpMs6d1jWNeMb/Sr00eedCmBDjrVyz2 Dll0lujAwNd269fmE47KU9Jk8/V/Lg== =bD+j -----END PGP SIGNATURE----- --Sig_/Tiozr0emFyu5ajXK1ul1jC7--