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Date: Wed, 22 Nov 2017 10:16:09 +0800 From: kernel test robot <xiaolong.ye@...el.com> To: Marc-André Lureau <marcandre.lureau@...hat.com> Cc: "Michael S. Tsirkin" <mst@...hat.com>, LKML <linux-kernel@...r.kernel.org>, Stephen Rothwell <sfr@...b.auug.org.au>, lkp@...org Subject: [lkp-robot] [fw_cfg] d5daa79dd1: BUG:unable_to_handle_kernel FYI, we noticed the following commit (built with gcc-5): commit: d5daa79dd1c013fb9dbec70c7e371eed1feb09db ("fw_cfg: do DMA read operation") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: boot on test machine: qemu-system-x86_64 -enable-kvm -cpu Nehalem -smp 2 -m 512M caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): +------------------------------------------+------------+------------+ | | 2199115e4b | d5daa79dd1 | +------------------------------------------+------------+------------+ | boot_successes | 16 | 4 | | boot_failures | 0 | 10 | | BUG:unable_to_handle_kernel | 0 | 10 | | Oops:#[##] | 0 | 10 | | RIP:nommu_map_page | 0 | 10 | | Kernel_panic-not_syncing:Fatal_exception | 0 | 10 | +------------------------------------------+------------+------------+ [ 64.571579] BUG: unable to handle kernel paging request at 00000000008000c0 [ 64.572878] IP: nommu_map_page+0x5/0x70 [ 64.573627] PGD 1f3c8067 P4D 1f3c8067 PUD 1f3c9067 PMD 0 [ 64.580011] Oops: 0000 [#1] SMP [ 64.580011] Modules linked in: qemu_fw_cfg(+) [ 64.580011] CPU: 1 PID: 185 Comm: udevd Not tainted 4.14.0-00009-gd5daa79 #1 [ 64.580011] task: ffff880015c58200 task.stack: ffff88001ef20000 [ 64.580011] RIP: 0010:nommu_map_page+0x5/0x70 [ 64.580011] RSP: 0018:ffff88001ef23a60 EFLAGS: 00010206 [ 64.580011] RAX: ffff88001ffda080 RBX: 0000000004000000 RCX: 0000000000000010 [ 64.580011] RDX: 00000000000006c0 RSI: 00000000008000c0 RDI: ffff88001d697810 [ 64.580011] RBP: ffff88001ef23a68 R08: 0000000000000000 R09: 0000000000000000 [ 64.580011] R10: ffffffff8101e940 R11: d9b5e5fe00000000 R12: 0000000000000004 [ 64.580011] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000001 [ 64.580011] FS: 00007fdd303f1780(0000) GS:ffff88001e700000(0000) knlGS:0000000000000000 [ 64.580011] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 64.580011] CR2: 00000000008000c0 CR3: 000000001f3c7000 CR4: 00000000000006e0 [ 64.580011] Call Trace: [ 64.580011] fw_cfg_dma_transfer+0x1a1/0x350 [qemu_fw_cfg] [ 64.580011] fw_cfg_read_blob+0xa5/0x180 [qemu_fw_cfg] [ 64.580011] fw_cfg_sysfs_probe+0x25a/0x1550 [qemu_fw_cfg] [ 64.580011] ? acpi_device_wakeup_disable+0x4d/0x50 [ 64.580011] platform_drv_probe+0x36/0x90 [ 64.580011] driver_probe_device+0x199/0x380 [ 64.580011] __driver_attach+0x9a/0xa0 [ 64.580011] ? driver_probe_device+0x380/0x380 [ 64.580011] bus_for_each_dev+0x61/0xa0 [ 64.580011] driver_attach+0x19/0x20 [ 64.580011] bus_add_driver+0x1a1/0x210 [ 64.580011] ? 0xffffffffa0006000 [ 64.580011] driver_register+0x5b/0xd0 [ 64.580011] ? 0xffffffffa0006000 [ 64.580011] __platform_driver_register+0x31/0x40 [ 64.580011] fw_cfg_sysfs_init+0x3e/0x1000 [qemu_fw_cfg] [ 64.580011] ? 0xffffffffa0006000 [ 64.580011] do_one_initcall+0x3f/0x164 [ 64.580011] ? __might_sleep+0x45/0x80 [ 64.580011] do_init_module+0x78/0x3d9 [ 64.580011] load_module+0x2267/0x2710 [ 64.580011] SYSC_finit_module+0xba/0xc0 [ 64.580011] ? SYSC_finit_module+0xba/0xc0 [ 64.580011] SyS_finit_module+0x9/0x10 [ 64.580011] do_syscall_64+0x74/0x1f0 [ 64.580011] entry_SYSCALL64_slow_path+0x25/0x25 [ 64.580011] RIP: 0033:0x7fdd2fac64a9 [ 64.580011] RSP: 002b:00007ffcecc0b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000139 [ 64.580011] RAX: ffffffffffffffda RBX: 0000000000653380 RCX: 00007fdd2fac64a9 [ 64.580011] RDX: 0000000000000000 RSI: 00007fdd2fd920aa RDI: 0000000000000007 [ 64.580011] RBP: 00007fdd2fd920aa R08: 0000000000000000 R09: 0000000000653380 [ 64.580011] R10: 0000000000000007 R11: 0000000000000206 R12: 0000000000000000 [ 64.580011] R13: 0000000000020000 R14: 0000000000000000 R15: 0000000000653380 [ 64.580011] Code: 49 89 c6 74 12 49 8b 16 48 83 e2 fc 75 83 0f 0b 0f ff e9 66 ff ff ff 44 89 e0 5b 41 5c 41 5d 41 5e 5d c3 0f 1f 00 55 48 89 e5 53 <4c> 8b 06 4c 89 c0 49 c1 e8 34 4e 8b 04 c5 00 e7 a3 82 48 c1 e8 [ 64.580011] RIP: nommu_map_page+0x5/0x70 RSP: ffff88001ef23a60 [ 64.580011] CR2: 00000000008000c0 [ 64.813564] ---[ end trace c6675425e1ab9b4d ]--- To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp qemu -k <bzImage> job-script # job-script is attached in this email Thanks, Xiaolong View attachment "config-4.14.0-00009-gd5daa79" of type "text/plain" (109335 bytes) View attachment "job-script" of type "text/plain" (4237 bytes) Download attachment "dmesg.xz" of type "application/x-xz" (23416 bytes)
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