Package: user-mode-linux Version: 5.10um1+b1 Severity: grave On startup of uml in e.g. fakemachine it panics straight away:
``` $ fakemachine -b uml "uname -a" kmsg_dump: <5>Linux version 5.10.5 (buildd@x86-conova-01) (gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1) #1 Mon Jan 11 20:40:53 UTC 2021 <6>Zone ranges: <6> Normal [mem 0x0000000000000000-0x00000000e164ffff] <6>Movable zone start for each node <6>Early memory node ranges <6> node 0: [mem 0x0000000000000000-0x000000008164ffff] <6>Initmem setup node 0 [mem 0x0000000000000000-0x000000008164ffff] <7>On node 0 totalpages: 530000 <7> Normal zone: 8282 pages used for memmap <7> Normal zone: 0 pages reserved <7> Normal zone: 530000 pages, LIFO batch:63 <7>pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 <7>pcpu-alloc: [0] 0 <6>Built 1 zonelists, mobility grouping on. Total pages: 521718 <5>Kernel command line: mem=2048M initrd=/tmp/fakemachine-981932232/initramfs.cpio panic=-1 nosplash systemd.unit=fakemachine.service console=tty0 vec0:transport=fd,fd=3,vec=0 quiet con1=fd:0,fd:1 con0=null con=none root=98:0 <6>Dentry cache hash table entries: 262144 (order: 9, 2097152 bytes, linear) <6>Inode-cache hash table entries: 131072 (order: 8, 1048576 bytes, linear) <6>mem auto-init: stack:off, heap alloc:off, heap free:off <6>Memory: 2044088K/2120000K available (5830K kernel code, 1535K rwdata, 1744K rodata, 191K init, 225K bss, 75912K reserved, 0K cma-reserved) <6>SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 <6>NR_IRQS: 24 <6>clocksource: timer: mask: 0xffffffffffffffff max_cycles: 0x1cd42e205, max_idle_ns: 881590404426 ns <6>Calibrating delay loop... 4213.14 BogoMIPS (lpj=21065728) <6>pid_max: default: 32768 minimum: 301 <6>LSM: Security Framework initializing <6>Yama: disabled by default; enable with sysctl kernel.yama.* <6>SELinux: Initializing. <6>TOMOYO Linux initialized <6>Mount-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) <6>Mountpoint-cache hash table entries: 4096 (order: 3, 32768 bytes, linear) <4> <4>Modules linked in: <6>Pid: 0, comm: swapper Not tainted 5.10.5 <6>RIP: 0033:[<00000000604d4201>] <6>RSP: 00007ffdc7521cb0 EFLAGS: 00010206 <6>RAX: 0000000000000000 RBX: 0000000000000059 RCX: 00007ffdc7520000 <6>RDX: 0000000000000035 RSI: 0000000060b69a71 RDI: 0000000060d8ac3b <6>RBP: 0000000000000000 R08: 0000000060b69a72 R09: 0000000060d8abe2 <6>R10: 0000000080000000 R11: 3d74696e695f676e R12: 0000000000000002 <6>R13: 0000000000000005 R14: 0000000000000000 R15: 0000000000000001 <0>Kernel panic - not syncing: Segfault with no mm <4>CPU: 0 PID: 0 Comm: swapper Not tainted 5.10.5 #1 <4>Stack: <4> 623e3d20 8000000000000000 7fd9ee013908 7fd9ee013ae5 <4> 7fd9ee4629e8 00000000 7ffdc7521cf0 00000400 <4> 7fd9ee409f20 7fd9ee4629e8 00000000 00000000Call Trace: <4> [<604d4fa3>] ? __printk_safe_enter+0x0/0x35 <4> [<604d154a>] ? arch_local_irq_save+0x0/0x22 <4> [<604d46f5>] ? vprintk_emit+0x9d/0x185 <4> [<604d49d3>] ? vprintk_deferred+0x1d/0x32 <4> [<60a26ee2>] ? printk_deferred+0x93/0x9b <4> [<6088f79f>] ? bucket_table_alloc.isra.0+0x115/0x13d <4> [<60a26e4f>] ? printk_deferred+0x0/0x9b <4> [<6049cddb>] ? set_signals+0x0/0x38 <4> [<60589588>] ? arch_local_irq_save+0x0/0x22 <4> [<6055c928>] ? kvmalloc_node+0x56/0x96 <4> [<6058d3c0>] ? __kmalloc+0x1e2/0x1f9 <4> [<608e3d32>] ? ___ratelimit+0xd0/0xde <4> [<6088f79f>] ? bucket_table_alloc.isra.0+0x115/0x13d <4> [<60901485>] ? _warn_unseeded_randomness+0x60/0x8f <4> [<6090295b>] ? get_random_u32+0x29/0x98 <4> [<6088f79f>] ? bucket_table_alloc.isra.0+0x115/0x13d <4> [<6088f68a>] ? bucket_table_alloc.isra.0+0x0/0x13d <4> [<6088ff7a>] ? rhashtable_init+0x175/0x1ca <4> [<607ef317>] ? ipc_init_ids+0x4e/0x6f <4> [<600153bd>] ? sem_init+0x17/0x45 fakemachine: error starting uml backend: <nil> ``` -- System Information: Debian Release: bullseye/sid APT prefers unstable-debug APT policy: (500, 'unstable-debug'), (500, 'stable-debug'), (500, 'proposed-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: armhf, arm64 Kernel: Linux 5.10.0-3-amd64 (SMP w/32 CPU threads) Kernel taint flags: TAINT_UNSIGNED_MODULE Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages user-mode-linux depends on: ii libc6 2.31-9 Versions of packages user-mode-linux recommends: ii uml-utilities 20070815.4-1 Versions of packages user-mode-linux suggests: ii gnome-terminal [x-terminal-emulator] 3.38.3-1 pn rootstrap <none> ii rxvt-unicode [x-terminal-emulator] 9.22-8+b1 ii slirp 1:1.0.17-11 pn user-mode-linux-doc <none> pn vde2 <none> ii xterm [x-terminal-emulator] 366-1 -- no debconf information
