Package: linux-image-5.10.0-9-amd64 Version: linux-image-5.10.0-9-amd64 and linux-image-5.14.0-0.bpo.2-amd64 Severity: important
Dear All, I am reporting this bug mostly to help others with the same problem, proposing adding a warning to the Debian 11 release notes and hoping for an upstream kernel bugfix. Description: Debian 11 Xen PV DomU (RAM<4GB) does not correctly shuts down because of a intel_pmc_core module problems on Intel Xeon E3-1230 (and possibly other Intel CPUs). https://github.com/QubesOS/qubes-issues/issues/6052 seems to be the same issue. Workarounds: * Use a Debian 10 kernel in the DomU, which works * Allocate 4+ GB RAM to the DomU * Use PVH instead of PV (needs Xen 4.9+, and is the preferred way since Xen 4.10) Please note: * Backports kernel (linux-image-5.14.0-0.bpo.2-amd64) suffers from the same problem. * Debian 10 Dom0 Xen 4.11.4+107-gef32c7afa2-1 beheaves the same way * Debian 9 Dom0 Xen 4.8.5.final+shim4.10.4-1+deb9u12 used PVHv1, which differs from PVHv2 used by Xen 4.09+ Test case: * Install Debian 10 or Debian 11, install Xen, create a PV config as below and upon startup "BUG: unable to handle page fault for address" is displayed and it fails to stop with "poweroff" later. kernel = "/usr/lib/grub-xen/grub-x86_64-xen.bin" extra = '(hd1)/boot/grub/grub.cfg' * Change PV to PVH and it works correctly: kernel = "/root/xen/images/debian11/vmlinuz-5.10.0-9-amd64" ramdisk = "/root/xen/images/debian11/initrd.img-5.10.0-9-amd64" type = 'pvh' The full bug in my case: [ 3.088164] BUG: unable to handle page fault for address: ffffc9004049b818 [ 3.088175] #PF: supervisor read access in kernel mode [ 3.088179] #PF: error_code(0x0000) - not-present page [ 3.088183] PGD 7fbd9067 P4D 7fbd9067 PUD 5186067 PMD 5303067 PTE 0 [ 3.088191] Oops: 0000 [#1] SMP NOPTI [ 3.088195] CPU: 0 PID: 201 Comm: systemd-udevd Not tainted 5.10.0-9-amd64 #1 Debian 5.10.70-1 [ 3.088204] RIP: e030:pmc_core_probe+0x136/0x410 [intel_pmc_core] [ 3.088209] Code: c0 48 c7 c7 48 a6 3c c0 e8 c7 25 d2 c0 48 8b 05 b0 7a 00 00 48 c7 83 88 00 00 00 20 a6 3c c0 48 63 40 50 48 03 05 92 7a 00 00 <8b> 00 48 8b 15 91 7a 00 00 48 c7 c7 e0 54 3c c0 8b 4a 54 ba 01 00 [ 3.088222] RSP: e02b:ffffc9004026fc30 EFLAGS: 00010286 [ 3.088226] RAX: ffffc9004049b818 RBX: ffff88800b028400 RCX: 00000000fe002000 [ 3.088232] RDX: ffffffffc03ca600 RSI: ffffffffc03c41f6 RDI: ffffffffc03ca648 [ 3.088238] RBP: ffff88800b028410 R08: 0000000000000000 R09: 00000000fe001fff [ 3.088244] R10: 0000000000007ff0 R11: ffff888008e01740 R12: 0000000000000000 [ 3.088249] R13: 0000000000000000 R14: 0000000000000006 R15: 0000000000000000 [ 3.088260] FS: 00007f94ad4928c0(0000) GS:ffff88807d400000(0000) knlGS:0000000000000000 [ 3.088267] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.088271] CR2: ffffc9004049b818 CR3: 00000000075d4000 CR4: 0000000000050660 [ 3.088281] Call Trace: [ 3.088288] platform_drv_probe+0x35/0x80 [ 3.088294] really_probe+0x37b/0x480 [ 3.088299] driver_probe_device+0xe1/0x150 [ 3.088303] ? driver_allows_async_probing+0x50/0x50 [ 3.088308] bus_for_each_drv+0x7e/0xc0 [ 3.088313] __device_attach+0xd8/0x1d0 [ 3.088317] bus_probe_device+0x8e/0xa0 [ 3.088321] device_add+0x399/0x840 [ 3.088325] platform_device_add+0x105/0x230 [ 3.088331] ? 0xffffffffc0327000 [ 3.088351] pmc_core_platform_init+0x78/0x1000 [intel_pmc_core_pltdrv] [ 3.088358] do_one_initcall+0x44/0x1d0 [ 3.088363] ? do_init_module+0x23/0x260 [ 3.088381] ? kmem_cache_alloc_trace+0xf5/0x200 [ 3.088386] do_init_module+0x5c/0x260 [ 3.088391] __do_sys_finit_module+0xb1/0x110 [ 3.088397] do_syscall_64+0x33/0x80 [ 3.088402] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 3.088407] RIP: 0033:0x7f94ad94b9b9 [ 3.088411] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a7 54 0c 00 f7 d8 64 89 01 48 [ 3.088423] RSP: 002b:00007ffde7aa3158 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 3.088430] RAX: ffffffffffffffda RBX: 0000563dc68d1530 RCX: 00007f94ad94b9b9 [ 3.088435] RDX: 0000000000000000 RSI: 00007f94adad6e2d RDI: 0000000000000018 [ 3.088441] RBP: 0000000000020000 R08: 0000000000000000 R09: 0000563dc689c9d0 [ 3.088447] R10: 0000000000000018 R11: 0000000000000246 R12: 00007f94adad6e2d [ 3.088453] R13: 0000000000000000 R14: 0000563dc68ce450 R15: 0000563dc68d1530 [ 3.088459] Modules linked in: intel_pmc_core_pltdrv(+) intel_pmc_core ghash_clmulni_intel evdev aesni_intel libaes crypto_simd cryptd glue_helper pcspkr drm fuse configfs ip_tables x_tables autofs4 ext4 crc16 mbcache jbd2 crc32c_generic crct10dif_pclmul crct10dif_common crc32_pclmul xen_netfront xen_blkfront crc32c_intel [ 3.088487] CR2: ffffc9004049b818 [ 3.088491] ---[ end trace dd3aec620db68a1d ]--- [ 3.088496] RIP: e030:pmc_core_probe+0x136/0x410 [intel_pmc_core] [ 3.088501] Code: c0 48 c7 c7 48 a6 3c c0 e8 c7 25 d2 c0 48 8b 05 b0 7a 00 00 48 c7 83 88 00 00 00 20 a6 3c c0 48 63 40 50 48 03 05 92 7a 00 00 <8b> 00 48 8b 15 91 7a 00 00 48 c7 c7 e0 54 3c c0 8b 4a 54 ba 01 00 [ 3.088514] RSP: e02b:ffffc9004026fc30 EFLAGS: 00010286 [ 3.088519] RAX: ffffc9004049b818 RBX: ffff88800b028400 RCX: 00000000fe002000 [ 3.088524] RDX: ffffffffc03ca600 RSI: ffffffffc03c41f6 RDI: ffffffffc03ca648 [ 3.088530] RBP: ffff88800b028410 R08: 0000000000000000 R09: 00000000fe001fff [ 3.088536] R10: 0000000000007ff0 R11: ffff888008e01740 R12: 0000000000000000 [ 3.088541] R13: 0000000000000000 R14: 0000000000000006 R15: 0000000000000000 [ 3.088552] FS: 00007f94ad4928c0(0000) GS:ffff88807d400000(0000) knlGS:0000000000000000 [ 3.088558] CS: e030 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3.088563] CR2: ffffc9004049b818 CR3: 00000000075d4000 CR4: 0000000000050660 Please ignore "Other system information" as I have to report this from a different machine due to network separation. -- System Information: Debian Release: 10.11 APT prefers oldstable-updates APT policy: (500, 'oldstable-updates'), (500, 'oldstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.19.0-18-amd64 (SMP w/8 CPU cores) Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled
