How to use

[Saikatsaha1996]

I unpacked it inside termix but unable to create container.. how can I use it can u please explain

[DreamConnected]

Can you provide some useful info, such as whether it's root? And the output of lxc-checkconfigor adb logcat -s lxc.

[Saikatsaha1996]

Can you provide some useful info, such as whether it's root? And the output of lxc-checkconfigor adb logcat -s lxc.

Actually I think I unable to install properly.. if you guide how to install then it will be great..

Now I am using Termux lxc but cgroup2 not supported so I want to use your lxc but don't understand installation process.. how to install or unpack to Termux

[DreamConnected]

Hi, @Saikatsaha1996

If you just want to use it in Termux, you can unpack it to /data/share. The prefix is set during compilation. Or you can compile it yourself in Termux and use it's own prefix.

[Saikatsaha1996]

Hi, @Saikatsaha1996

If you just want to use it in Termux, you can unpack it to /data/share. The prefix is set during compilation. Or you can compile it yourself in Termux and use it's own prefix.

Ok i will try to build myself.. but never compile lxc .. i checked meson option.. it's complex..
If you provide meson build configure setup it would be great

Thank you 😊

[DreamConnected]

Hi, @Saikatsaha1996

If you just want to use it in Termux, you can unpack it to /data/share. The prefix is set during compilation. Or you can compile it yourself in Termux and use it's own prefix.

Ok i will try to build myself.. but never compile lxc .. i checked meson option.. it's complex..
If you provide meson build configure setup it would be great

Thank you 😊

You can refer to ci:main.yml or just use the one pasted below:

export LDFLAGS="-L/system/lib64 -lcap -lselinux -lminijail -lssl"

        meson setup build \
            -Dprefix=/data/user/0/com.termux/files/usr \
            -Dinit-script=module \
            -Druntime-path=/data/user/0/com.termux/files/usr/tmp \
            -Dstrip=true \
            -Dd_lto=true \
            -Dlog-path=log/lxc \
            -Ddata-path=lib/lxc \
            --localstatedir=/data/user/0/com.termux/files/usr/var \
            -Db_pie=false \
            -Dmemfd-rexec=false \
            --buildtype release \
            -Dcapabilities=true \
            -Dseccomp=false \
            -Dseccomp-minijail=true \
            -Dselinux=true \
            -Dapparmor=false \
            -Dopenssl=true \
            -Ddbus=false \
            -Dandroid-log=true \
            -Dandroid-audio=false \
            -Dandroid-network=false \
            -Dlandlock-monitor=false \
            -Dinstall-state-dirs=true \
            -Dman=false \
            -Dtests=false

To lower the barrier to compilation and rely entirely on Android's built-in libraries, we made some sacrifices for seccomp. If you're not familiar with libminijail's seccomp configuration, you can disable -Dseccomp-minijail and enable -Dseccomp instead. Note that they are mutually exclusive.

[Saikatsaha1996]

Hi, @Saikatsaha1996
If you just want to use it in Termux, you can unpack it to /data/share. The prefix is set during compilation. Or you can compile it yourself in Termux and use it's own prefix.

Ok i will try to build myself.. but never compile lxc .. i checked meson option.. it's complex..
If you provide meson build configure setup it would be great
Thank you 😊

You can refer to ci:main.yml or just use the one pasted below:

export LDFLAGS="-L/system/lib64 -lcap -lselinux -lminijail -lssl"

        meson setup build \
            -Dprefix=/data/user/0/com.termux/files/usr \
            -Dinit-script=module \
            -Druntime-path=/data/user/0/com.termux/files/usr/tmp \
            -Dstrip=true \
            -Dd_lto=true \
            -Dlog-path=log/lxc \
            -Ddata-path=lib/lxc \
            --localstatedir=/data/user/0/com.termux/files/usr/var \
            -Db_pie=false \
            -Dmemfd-rexec=false \
            --buildtype release \
            -Dcapabilities=true \
            -Dseccomp=false \
            -Dseccomp-minijail=true \
            -Dselinux=true \
            -Dapparmor=false \
            -Dopenssl=true \
            -Ddbus=false \
            -Dandroid-log=true \
            -Dandroid-audio=false \
            -Dandroid-network=false \
            -Dlandlock-monitor=false \
            -Dinstall-state-dirs=true \
            -Dman=false \
            -Dtests=false

To lower the barrier to compilation and rely entirely on Android's built-in libraries, we made some sacrifices for seccomp. If you're not familiar with libminijail's seccomp configuration, you can disable -Dseccomp-minijail and enable -Dseccomp instead. Note that they are mutually exclusive.

Always getting this error unable to start contaner

~/Termux-LXC-Guide $ sudo cat lxc.log                                       lxc-start ubuntu 20260503160836.807 TRACE    parse - ../src/lxc/parse.c:lxc_file_for_each_line_mmap:62 - MFD_NOEXEC_SEAL may unsupported, using MFD_CLOEXEC only
lxc-start ubuntu 20260503160836.808 TRACE    commands - ../src/lxc/commands.c:lxc_server_init:2138 - Created abstract unix socket "/data/user/0/com.termux/files/usr/var/lib/lxc/ubuntu/command"
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_init_handler:956 - Unix domain socket 5 for command server is ready
lxc-start ubuntu 20260503160836.808 WARN     start - ../src/lxc/start.c:lxc_check_inherited:367 - Inherited fd 3
lxc-start ubuntu 20260503160836.808 WARN     start - ../src/lxc/start.c:lxc_check_inherited:367 - Inherited fd 6
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_start:2431 - Doing lxc_start
lxc-start ubuntu 20260503160836.808 INFO     lsm - ../src/lxc/lsm/lsm.c:lsm_init_static:38 - Initialized LSM security driver nop
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_init:979 - Initialized LSM
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to STARTING
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_init:985 - Set container state to "STARTING"
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:lxc_init:1041 - Set environment variables
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:lxc_init:1046 - Ran pre-start hooks
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:setup_signal_fd:408 - Created signal file descriptor 9
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:lxc_init:1059 - Set up signal fd
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:331 - Adding cgroup hierarchy mounted at  and base cgroup (null)
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the cpu controller
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the io controller
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the pids controller
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the rdma controller
lxc-start ubuntu 20260503160836.810 TRACE    cgroup2_devices - ../src/lxc/cgroups/cgroup2_devices.c:bpf_program_load_kernel:335 - Loaded bpf program: func#0 @0
0: R1=ctx(id=0,off=0,imm=0) R10=fp0
0: (61) r2 = *(u32 *)(r1 +0)
1: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
1: (54) w2 &= 65535
2: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R10=fp0
2: (61) r3 = *(u32 *)(r1 +0)
3: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
3: (74) w3 >>= 16
4: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R10=fp0
4: (61) r4 = *(u32 *)(r1 +4)
5: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R4_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
5: (61) r5 = *(u32 *)(r1 +8)
6: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R4_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R5_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
6: (b7) r0 = 1
7: R0_w=inv1 R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R4_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R5_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
7: (95) exit
processed 8 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0

lxc-start ubuntu 20260503160836.811 TRACE    cgroup2_devices - ../src/lxc/cgroups/cgroup2_devices.c:bpf_devices_cgroup_supported:553 - The bpf device cgroup is supported
lxc-start ubuntu 20260503160836.811 TRACE    cgroup - ../src/lxc/cgroups/cgroup.c:cgroup_init:41 - Initialized cgroup driver cgfsng
lxc-start ubuntu 20260503160836.811 TRACE    cgroup - ../src/lxc/cgroups/cgroup.c:cgroup_init:44 - Unified cgroup layout
lxc-start ubuntu 20260503160836.811 TRACE    start - ../src/lxc/start.c:lxc_init:1066 - Initialized cgroup driver
lxc-start ubuntu 20260503160836.811 TRACE    start - ../src/lxc/start.c:lxc_init:1073 - Read seccomp policy
lxc-start ubuntu 20260503160836.811 TRACE    start - ../src/lxc/start.c:lxc_init:1080 - Initialized LSM
lxc-start ubuntu 20260503160836.811 INFO     start - ../src/lxc/start.c:lxc_init:1082 - Container "ubuntu" is initialized
lxc-start ubuntu 20260503160836.811 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:487 - Created 12(lxc.monitor.ubuntu) cgroup
lxc-start ubuntu 20260503160836.811 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:501 - Opened newly created cgroup lxc.monitor.ubuntu as 13
lxc-start ubuntu 20260503160836.811 INFO     cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_monitor_create:1442 - The monitor process uses "lxc.monitor.ubuntu" as cgroup
lxc-start ubuntu 20260503160836.821 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_monitor_enter:1592 - Moved monitor (21777) into cgroup 13
lxc-start ubuntu 20260503160836.821 DEBUG    storage - ../src/lxc/storage/storage.c:get_storage_by_name:209 - Detected rootfs type "dir"
lxc-start ubuntu 20260503160836.821 TRACE    conf - ../src/lxc/conf.c:lxc_rootfs_init:387 - Pinned rootfs 15(.lxc_keep)
lxc-start ubuntu 20260503160836.821 TRACE    conf - ../src/lxc/conf.c:lxc_rootfs_init:403 - Unlinked pinned file 14(.lxc_keep)
lxc-start ubuntu 20260503160836.822 TRACE    sync - ../src/lxc/sync.c:lxc_sync_init:139 - Initialized synchronization infrastructure
lxc-start ubuntu 20260503160836.822 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:487 - Created 12(lxc.payload.ubuntu) cgroup
lxc-start ubuntu 20260503160836.822 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:501 - Opened newly created cgroup lxc.payload.ubuntu as 19
lxc-start ubuntu 20260503160836.822 INFO     cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_payload_create:1551 - The container process uses "lxc.payload.ubuntu" as inner and "lxc.payload.ubuntu" as limit cgroup
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to ABORTING
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.822 ERROR    start - ../src/lxc/start.c:__lxc_start:2317 - Failed to spawn container "ubuntu"
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to ABORTING
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to STOPPING
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.823 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_tree_remove:359 - Removed cgroup tree 12(lxc.payload.ubuntu)
lxc-start ubuntu 20260503160836.823 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:487 - Reusing 12(lxc.pivot) cgroup
lxc-start ubuntu 20260503160836.823 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:501 - Opened cgroup lxc.pivot as 14
lxc-start ubuntu 20260503160836.824 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_monitor_destroy:667 - Removed cgroup tree 12(lxc.monitor.ubuntu)
lxc-start ubuntu 20260503160836.824 TRACE    start - ../src/lxc/start.c:lxc_end:1164 - Closed command socket
lxc-start ubuntu 20260503160836.824 TRACE    start - ../src/lxc/start.c:lxc_end:1175 - Set container state to "STOPPED"
lxc-start ubuntu 20260503160836.824 INFO     utils - ../src/lxc/utils.c:run_script_argv:588 - Executing script "/data/data/com.termux/files/home/Termux-LXC-Guide/src/required-lxc-configuration/scripts/utils/utils.post-stop.sh" for container "ubuntu"
lxc-start ubuntu 20260503160836.824 TRACE    utils - ../src/lxc/utils.c:run_script_argv:631 - Set environment variable: LXC_HOOK_TYPE=post-stop
lxc-start ubuntu 20260503160836.824 TRACE    utils - ../src/lxc/utils.c:run_script_argv:636 - Set environment variable: LXC_HOOK_SECTION=lxc
lxc-start ubuntu 20260503160836.881 ERROR    lxc_start - ../src/lxc/tools/lxc_start.c:lxc_start_main:307 - The container failed to start
lxc-start ubuntu 20260503160836.881 ERROR    lxc_start - ../src/lxc/tools/lxc_start.c:lxc_start_main:313 - Additional information can be obtained by setting the --logfile and --logpriority options

[DreamConnected]

Hi, @Saikatsaha1996
If you just want to use it in Termux, you can unpack it to /data/share. The prefix is set during compilation. Or you can compile it yourself in Termux and use it's own prefix.

Ok i will try to build myself.. but never compile lxc .. i checked meson option.. it's complex..
If you provide meson build configure setup it would be great
Thank you 😊

You can refer to ci:main.yml or just use the one pasted below:

export LDFLAGS="-L/system/lib64 -lcap -lselinux -lminijail -lssl"

        meson setup build \
            -Dprefix=/data/user/0/com.termux/files/usr \
            -Dinit-script=module \
            -Druntime-path=/data/user/0/com.termux/files/usr/tmp \
            -Dstrip=true \
            -Dd_lto=true \
            -Dlog-path=log/lxc \
            -Ddata-path=lib/lxc \
            --localstatedir=/data/user/0/com.termux/files/usr/var \
            -Db_pie=false \
            -Dmemfd-rexec=false \
            --buildtype release \
            -Dcapabilities=true \
            -Dseccomp=false \
            -Dseccomp-minijail=true \
            -Dselinux=true \
            -Dapparmor=false \
            -Dopenssl=true \
            -Ddbus=false \
            -Dandroid-log=true \
            -Dandroid-audio=false \
            -Dandroid-network=false \
            -Dlandlock-monitor=false \
            -Dinstall-state-dirs=true \
            -Dman=false \
            -Dtests=false

To lower the barrier to compilation and rely entirely on Android's built-in libraries, we made some sacrifices for seccomp. If you're not familiar with libminijail's seccomp configuration, you can disable -Dseccomp-minijail and enable -Dseccomp instead. Note that they are mutually exclusive.

Always getting this error unable to start contaner

~/Termux-LXC-Guide $ sudo cat lxc.log                                       lxc-start ubuntu 20260503160836.807 TRACE    parse - ../src/lxc/parse.c:lxc_file_for_each_line_mmap:62 - MFD_NOEXEC_SEAL may unsupported, using MFD_CLOEXEC only
lxc-start ubuntu 20260503160836.808 TRACE    commands - ../src/lxc/commands.c:lxc_server_init:2138 - Created abstract unix socket "/data/user/0/com.termux/files/usr/var/lib/lxc/ubuntu/command"
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_init_handler:956 - Unix domain socket 5 for command server is ready
lxc-start ubuntu 20260503160836.808 WARN     start - ../src/lxc/start.c:lxc_check_inherited:367 - Inherited fd 3
lxc-start ubuntu 20260503160836.808 WARN     start - ../src/lxc/start.c:lxc_check_inherited:367 - Inherited fd 6
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_start:2431 - Doing lxc_start
lxc-start ubuntu 20260503160836.808 INFO     lsm - ../src/lxc/lsm/lsm.c:lsm_init_static:38 - Initialized LSM security driver nop
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_init:979 - Initialized LSM
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to STARTING
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.808 TRACE    start - ../src/lxc/start.c:lxc_init:985 - Set container state to "STARTING"
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:lxc_init:1041 - Set environment variables
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:lxc_init:1046 - Ran pre-start hooks
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:setup_signal_fd:408 - Created signal file descriptor 9
lxc-start ubuntu 20260503160836.809 TRACE    start - ../src/lxc/start.c:lxc_init:1059 - Set up signal fd
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:331 - Adding cgroup hierarchy mounted at  and base cgroup (null)
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the cpu controller
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the io controller
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the pids controller
lxc-start ubuntu 20260503160836.810 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_hierarchy_add:333 - The hierarchy contains the rdma controller
lxc-start ubuntu 20260503160836.810 TRACE    cgroup2_devices - ../src/lxc/cgroups/cgroup2_devices.c:bpf_program_load_kernel:335 - Loaded bpf program: func#0 @0
0: R1=ctx(id=0,off=0,imm=0) R10=fp0
0: (61) r2 = *(u32 *)(r1 +0)
1: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
1: (54) w2 &= 65535
2: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R10=fp0
2: (61) r3 = *(u32 *)(r1 +0)
3: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
3: (74) w3 >>= 16
4: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R10=fp0
4: (61) r4 = *(u32 *)(r1 +4)
5: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R4_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
5: (61) r5 = *(u32 *)(r1 +8)
6: R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R4_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R5_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
6: (b7) r0 = 1
7: R0_w=inv1 R1=ctx(id=0,off=0,imm=0) R2_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R3_w=inv(id=0,umax_value=65535,var_off=(0x0; 0xffff)) R4_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R5_w=inv(id=0,umax_value=4294967295,var_off=(0x0; 0xffffffff)) R10=fp0
7: (95) exit
processed 8 insns (limit 1000000) max_states_per_insn 0 total_states 0 peak_states 0 mark_read 0

lxc-start ubuntu 20260503160836.811 TRACE    cgroup2_devices - ../src/lxc/cgroups/cgroup2_devices.c:bpf_devices_cgroup_supported:553 - The bpf device cgroup is supported
lxc-start ubuntu 20260503160836.811 TRACE    cgroup - ../src/lxc/cgroups/cgroup.c:cgroup_init:41 - Initialized cgroup driver cgfsng
lxc-start ubuntu 20260503160836.811 TRACE    cgroup - ../src/lxc/cgroups/cgroup.c:cgroup_init:44 - Unified cgroup layout
lxc-start ubuntu 20260503160836.811 TRACE    start - ../src/lxc/start.c:lxc_init:1066 - Initialized cgroup driver
lxc-start ubuntu 20260503160836.811 TRACE    start - ../src/lxc/start.c:lxc_init:1073 - Read seccomp policy
lxc-start ubuntu 20260503160836.811 TRACE    start - ../src/lxc/start.c:lxc_init:1080 - Initialized LSM
lxc-start ubuntu 20260503160836.811 INFO     start - ../src/lxc/start.c:lxc_init:1082 - Container "ubuntu" is initialized
lxc-start ubuntu 20260503160836.811 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:487 - Created 12(lxc.monitor.ubuntu) cgroup
lxc-start ubuntu 20260503160836.811 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:501 - Opened newly created cgroup lxc.monitor.ubuntu as 13
lxc-start ubuntu 20260503160836.811 INFO     cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_monitor_create:1442 - The monitor process uses "lxc.monitor.ubuntu" as cgroup
lxc-start ubuntu 20260503160836.821 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_monitor_enter:1592 - Moved monitor (21777) into cgroup 13
lxc-start ubuntu 20260503160836.821 DEBUG    storage - ../src/lxc/storage/storage.c:get_storage_by_name:209 - Detected rootfs type "dir"
lxc-start ubuntu 20260503160836.821 TRACE    conf - ../src/lxc/conf.c:lxc_rootfs_init:387 - Pinned rootfs 15(.lxc_keep)
lxc-start ubuntu 20260503160836.821 TRACE    conf - ../src/lxc/conf.c:lxc_rootfs_init:403 - Unlinked pinned file 14(.lxc_keep)
lxc-start ubuntu 20260503160836.822 TRACE    sync - ../src/lxc/sync.c:lxc_sync_init:139 - Initialized synchronization infrastructure
lxc-start ubuntu 20260503160836.822 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:487 - Created 12(lxc.payload.ubuntu) cgroup
lxc-start ubuntu 20260503160836.822 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:501 - Opened newly created cgroup lxc.payload.ubuntu as 19
lxc-start ubuntu 20260503160836.822 INFO     cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_payload_create:1551 - The container process uses "lxc.payload.ubuntu" as inner and "lxc.payload.ubuntu" as limit cgroup
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to ABORTING
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.822 ERROR    start - ../src/lxc/start.c:__lxc_start:2317 - Failed to spawn container "ubuntu"
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to ABORTING
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:521 - Set container state to STOPPING
lxc-start ubuntu 20260503160836.822 TRACE    start - ../src/lxc/start.c:lxc_serve_state_clients:524 - No state clients registered
lxc-start ubuntu 20260503160836.823 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgroup_tree_remove:359 - Removed cgroup tree 12(lxc.payload.ubuntu)
lxc-start ubuntu 20260503160836.823 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:487 - Reusing 12(lxc.pivot) cgroup
lxc-start ubuntu 20260503160836.823 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:__cgroup_tree_create:501 - Opened cgroup lxc.pivot as 14
lxc-start ubuntu 20260503160836.824 TRACE    cgfsng - ../src/lxc/cgroups/cgfsng.c:cgfsng_monitor_destroy:667 - Removed cgroup tree 12(lxc.monitor.ubuntu)
lxc-start ubuntu 20260503160836.824 TRACE    start - ../src/lxc/start.c:lxc_end:1164 - Closed command socket
lxc-start ubuntu 20260503160836.824 TRACE    start - ../src/lxc/start.c:lxc_end:1175 - Set container state to "STOPPED"
lxc-start ubuntu 20260503160836.824 INFO     utils - ../src/lxc/utils.c:run_script_argv:588 - Executing script "/data/data/com.termux/files/home/Termux-LXC-Guide/src/required-lxc-configuration/scripts/utils/utils.post-stop.sh" for container "ubuntu"
lxc-start ubuntu 20260503160836.824 TRACE    utils - ../src/lxc/utils.c:run_script_argv:631 - Set environment variable: LXC_HOOK_TYPE=post-stop
lxc-start ubuntu 20260503160836.824 TRACE    utils - ../src/lxc/utils.c:run_script_argv:636 - Set environment variable: LXC_HOOK_SECTION=lxc
lxc-start ubuntu 20260503160836.881 ERROR    lxc_start - ../src/lxc/tools/lxc_start.c:lxc_start_main:307 - The container failed to start
lxc-start ubuntu 20260503160836.881 ERROR    lxc_start - ../src/lxc/tools/lxc_start.c:lxc_start_main:313 - Additional information can be obtained by setting the --logfile and --logpriority options

Could you print out the current env? The logs aren't really helpful right now, and honestly, the upstream doesn't provide much help with the container spawn process either. Did you use the -F flag with lxc-start? Also, I noticed you're using Termux-LXC-Guide for the container setup, not that it makes much difference.

[Saikatsaha1996]

@DreamConnected i actually modified for cgroup2 only
https://github.com/Saikatsaha1996/Termux-LXC-Guide/tree/exp1

lxc.net.0.type = none
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:b8:16:74
lxc.hook.version = 1
lxc.tty.max = 10
lxc.environment = TERM
#lxc.apparmor.profile = unconfined
lxc.cgroup2.relative = 1
lxc.autodev = 1
lxc.cgroup2.devices.allow = a
lxc.init.cmd = /sbin/init systemd.unified_cgroup_hierarchy=1
lxc.mount.entry = /sdcard sdcard none bind,optional,create=dir 0 0

sudo lxc-start -F -n ubuntu -l DEBUG -o log.txt

[DreamConnected]

@DreamConnected i actually modified for cgroup2 only
https://github.com/Saikatsaha1996/Termux-LXC-Guide/tree/exp1

lxc.net.0.type = none
lxc.net.0.flags = up
lxc.net.0.hwaddr = 00:16:3e:b8:16:74
lxc.hook.version = 1
lxc.tty.max = 10
lxc.environment = TERM
#lxc.apparmor.profile = unconfined
lxc.cgroup2.relative = 1
lxc.autodev = 1
lxc.cgroup2.devices.allow = a
lxc.init.cmd = /sbin/init systemd.unified_cgroup_hierarchy=1
lxc.mount.entry = /sdcard sdcard none bind,optional,create=dir 0 0

sudo lxc-start -F -n ubuntu -l DEBUG -o log.txt

Sorry for the late reply. I was sleeping from 0-8 o'clock.

rm log.txt, and change the log level to TRACE, do lxc-start again then upload the logfile.