lxcfs terminated with signal SIGSEGV

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Feel free to remove anything which doesn't apply to you and add more information where it makes sense.

# Required information

 * Distribution:
   - AlmaLinux 9.3
   -  Rocky Linux 8.7
 * LXCFS version: 5.0.2 (fuse2)
 * The output of
   * `uname -a`
     - Linux *** 5.14.0-362.24.2.el9_3.x86_64 # 1 SMP PREEMPT_DYNAMIC Sat Mar 30 14:11:54 EDT 2024 x86_64 x86_64 x86_64 GNU/Linux
     -  Linux *** 5.16.11-1.el8.elrepo.x86_64 # 1 SMP PREEMPT Tue Feb 22 10:29:18 EST 2022 x86_64 x86_64 x86_64 GNU/Linux
   * `cat /proc/1/mounts`
     - [mounts.txt](https://github.com/user-attachments/files/16578289/mounts.txt)
   * `ps aux | grep lxcfs`
     - /usr/local/bin/lxcfs /var/lib/lxcfs/ --enable-cfs --enable-pidfd --enable-loadavg
   * LXCFS logs
      <details>
      <pre>
      '/lxcfs/fusermount' -> '/usr/local/bin/fusermount'
      mkdir: created directory '/usr/local/lib64/lxcfs'
      '/lxcfs/lxcfs' -> '/usr/local/bin/lxcfs'
      '/lxcfs/liblxcfs.so' -> '/usr/local/lib64/lxcfs/liblxcfs.so'
      '/lxcfs/libfuse.so.2.9.2' -> '/usr/lib64/libfuse.so.2.9.2'
      '/usr/lib64/libfuse.so.2' -> '/usr/lib64/libfuse.so.2.9.2'
      '/lxcfs/libulockmgr.so.1.0.1' -> '/usr/lib64/libulockmgr.so.1.0.1'
      '/usr/lib64/libulockmgr.so.1' -> '/usr/lib64/libulockmgr.so.1.0.1'
      Running constructor lxcfs_init to reload liblxcfs
      mount namespace: 5
      hierarchies:
        0: fd:   6: cpuset,cpu,io,memory,hugetlb,pids,rdma,misc
      Kernel supports pidfds
      Kernel does not support swap accounting
      api_extensions:
      - cgroups
      - sys_cpu_online
      - proc_cpuinfo
      - proc_diskstats
      - proc_loadavg
      - proc_meminfo
      - proc_stat
      - proc_swaps
      - proc_uptime
      - proc_slabinfo
      - shared_pidns
      - cpuview_daemon
      - loadavg_daemon
      - pidfds
      ../src/proc_loadavg.c: 388: refresh_load: Failed to open "/proc/1765502/task"
      ../src/proc_loadavg.c: 388: refresh_load: Failed to open "/proc/1771491/task"
      ../src/proc_loadavg.c: 388: refresh_load: Failed to open "/proc/2037031/task"
      ............................................................................
      ../src/proc_loadavg.c: 388: refresh_load: Failed to open "/proc/1565585/task"
      ../src/proc_loadavg.c: 388: refresh_load: Failed to open "/proc/1565600/task"
      </pre>
      </details>
# Issue description

lxcfs terminated with signal SIGSEGV after running some days/months (7000+ nodes, crash 1-2 lxcfs per month)

## case 1 (lxcfs-5.0.2 fuse2 on almalinux 9.3)
```bash
$ gdb /usr/local/bin/lxcfs /data0/lxcfs/core.lxcfs.0.87a60023a4904073b7dddd36c60387e7.20905.1723098716000000
GNU gdb (GDB) Red Hat Enterprise Linux 10.2-13.el9
Copyright (C) 2021 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/local/bin/lxcfs...
[New LWP 714018]
[New LWP 20905]
[New LWP 21061]
[New LWP 714587]
[New LWP 714556]
[New LWP 728323]
[New LWP 728330]
[New LWP 728324]
[New LWP 728346]
[New LWP 728345]
[New LWP 728321]
[New LWP 728342]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/local/bin/lxcfs /var/lib/lxcfs/ --enable-cfs --enable-pidfd --enable-loada'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  __vsnprintf_internal (string=0x0, maxlen=<optimized out>, format=0x7f6fb4dd02e8 "0-%d\n", args=args@entry=0x7f6f0a7fb850, mode_flags=mode_flags@entry=0) at vsnprintf.c:112
112	  string[0] = '\0';
[Current thread is 1 (Thread 0x7f6f0a7fc640 (LWP 714018))]
(gdb) set pagination off
(gdb) bt full
#0  __vsnprintf_internal (string=0x0, maxlen=<optimized out>, format=0x7f6fb4dd02e8 "0-%d\n", args=args@entry=0x7f6f0a7fb850, mode_flags=mode_flags@entry=0) at vsnprintf.c:112
        sf = {f = {_sbf = {_f = {_flags = -72515584, _IO_read_ptr = 0x0, _IO_read_end = 0x0, _IO_read_base = 0x0, _IO_write_base = 0x0, _IO_write_ptr = 0x0, _IO_write_end = 0x0, _IO_buf_base = 0x0, _IO_buf_end = 0x0, _IO_save_base = 0x0, _IO_backup_base = 0x0, _IO_save_end = 0x0, _markers = 0x0, _chain = 0x0, _fileno = 0, _flags2 = 128, _old_offset = 8803452003510089728, _cur_column = 0, _vtable_offset = 127 '\177', _shortbuf = "\n", _lock = 0x0, _offset = 2, _codecvt = 0x0, _wide_data = 0xffffffffffffffff, _freeres_list = 0x0, _freeres_buf = 0x1999999999999999, __pad5 = 0, _mode = -1, _unused2 = "\000\000\000\000\300\"\000\\\000\000\000\000\340\062\000\\n\177\000"}, vtable = 0x7f6fb4bf72e0 <_IO_strn_jumps>}, _s = {_allocate_buffer_unused = 0x7f6f0a7fb7d0, _free_buffer_unused = 0x7f6f0a7fb808}}, overflow_buf = "0\274\177\no\177\000\000\030\270\177\n\002\000\000\000`\270\177\no\177\000\000-\365ڴo\177\000\000\060\f\000\\n\177\000\000\220\270\177\no\177\000\000\220\061\000\\n\177\000\000p\312\023\263\333U\000"}
        ret = <optimized out>
#1  0x00007f6fb4a6f596 in __GI___snprintf (s=<optimized out>, maxlen=<optimized out>, format=<optimized out>) at snprintf.c:31
        arg = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7f6f0a7fb930, reg_save_area = 0x7f6f0a7fb870}}
        done = <optimized out>
#2  0x00007f6fb4dc88dd in do_cpuset_read (cg=0x7f6e5c003190 "/kubepods.slice/kubepods-burstable.slice/kubepods-burstable-pod2f8452ff_747f_4657_a644_08170f3c287e.slice/cri-containerd-e2cc84a07ba207bc2b8cb2f4ead9e4bfec10630d562418ffb9107c6eab7ef0ac.scope", buf=0x0, buflen=518) at ../src/sysfs_fuse.c:218
        cpuset = 0x7f6e5c026b00 "38-45,114-121"
        fc = 0x7f6e5c000bf0
        opts = 0x55dbb313c2a0
        max_cpus = 16
        total_len = 0
        use_view = true
        __func__ = "do_cpuset_read"
#3  0x00007f6fb4dc8b70 in sys_devices_system_cpu_online_read (buf=0x7f6e5c005130 "\020\b", size=8192, offset=0, fi=0x7f6f0a7fbc30) at ../src/sysfs_fuse.c:266
        cg = 0x7f6e5c003190 "/kubepods.slice/kubepods-burstable.slice/kubepods-burstable-pod2f8452ff_747f_4657_a644_08170f3c287e.slice/cri-containerd-e2cc84a07ba207bc2b8cb2f4ead9e4bfec10630d562418ffb9107c6eab7ef0ac.scope"
        fc = 0x7f6e5c000bf0
        d = 0x7f6ea4009cf0
        cache = 0x0
        initpid = 2014638
        total_len = 0
#4  0x00007f6fb4dca7cd in sys_read (path=0x7f6e5c000c30 "/sys/devices/system/cpu/online", buf=0x7f6e5c005130 "\020\b", size=8192, offset=0, fi=0x7f6f0a7fbc30) at ../src/sysfs_fuse.c:832
        f = 0x7f6ea4009cf0
#5  0x000055dbb1215fa0 in do_sys_read (path=0x7f6e5c000c30 "/sys/devices/system/cpu/online", buf=0x7f6e5c005130 "\020\b", size=8192, offset=0, fi=0x7f6f0a7fbc30) at ../src/lxcfs.c:288
        error = 0x0
        __sys_read = 0x7f6fb4dca73c <sys_read>
        __func__ = "do_sys_read"
#6  0x000055dbb12175a5 in lxcfs_read (path=0x7f6e5c000c30 "/sys/devices/system/cpu/online", buf=0x7f6e5c005130 "\020\b", size=8192, offset=0, fi=0x7f6f0a7fbc30) at ../src/lxcfs.c:846
        ret = 0
#7  0x00007f6fb4e0d537 in fuse_fs_read_buf (fs=0x55dbb313f970, path=0x7f6e5c000c30 "/sys/devices/system/cpu/online", bufp=bufp@entry=0x7f6f0a7fbb90, size=size@entry=8192, off=off@entry=0, fi=fi@entry=0x7f6f0a7fbc30) at fuse.c:1792
        buf = <optimized out>
        mem = <optimized out>
        res = <optimized out>
#8  0x00007f6fb4e0d712 in fuse_lib_read (req=0x7f6e5c001750, ino=14, size=8192, off=0, fi=0x7f6f0a7fbc30) at fuse.c:3250
        d = {id = 214748364809, cond = {__data = {__lock = 0, __futex = 0, __total_seq = 0, __wakeup_seq = 0, __woken_seq = 511101108348, __mutex = 0x5b0000006e, __nwaiters = 8, __broadcast_seq = 0}, __size = '\000' <repeats 24 times>, "|\000\000\000w\000\000\000n\000\000\000[\000\000\000\b\000\000\000\000\000\000", __align = 0}, finished = 676688}
        f = 0x55dbb313f810
        buf = 0x7f6e5c0017e0
        path = 0x7f6e5c000c30 "/sys/devices/system/cpu/online"
        res = <optimized out>
#9  0x00007f6fb4e160ce in do_read (req=<optimized out>, nodeid=<optimized out>, inarg=<optimized out>) at fuse_lowlevel.c:1232
        fi = {flags = 32768, fh_old = 140113174633712, writepage = 0, direct_io = 0, keep_cache = 0, flush = 0, nonseekable = 0, flock_release = 0, padding = 0, fh = 140113174633712, lock_owner = 16163897521168180545}
        arg = <optimized out>
#10 0x00007f6fb4e16b6b in fuse_ll_process_buf (data=0x55dbb313fb00, buf=0x7f6f0a7fbe00, ch=<optimized out>) at fuse_lowlevel.c:2441
        f = 0x55dbb313fb00
        write_header_size = 80
        bufv = {count = 1, idx = 0, off = 0, buf = {{size = 64, flags = 0, mem = 0x7f6e74000ba0, fd = 0, pos = 0}}}
        tmpbuf = {count = 1, idx = 0, off = 0, buf = {{size = 80, flags = 0, mem = 0x0, fd = -1, pos = 0}}}
        in = 0x7f6e74000ba0
        inarg = 0x7f6e74000bc8
        req = <optimized out>
        mbuf = 0x0
        err = <optimized out>
        res = <optimized out>
#11 0x00007f6fb4e13401 in fuse_do_work (data=0x7f6e74000b60) at fuse_loop_mt.c:117
        isforget = 0
        ch = 0x55dbb313f570
        fbuf = {size = 64, flags = 0, mem = 0x7f6e74000ba0, fd = 0, pos = 0}
        res = <optimized out>
        w = 0x7f6e74000b60
        mt = 0x7ffd24fb6470
#12 0x00007f6fb4a9f802 in start_thread (arg=<optimized out>) at pthread_create.c:443
        ret = <optimized out>
        pd = <optimized out>
        out = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140114902632976, 7213687130270957455, 140114894243392, 0, 140117749134640, 0, -7295199422699569265, -7294912847722348657}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#13 0x00007f6fb4a3f450 in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:81
No locals.
quit)
```

## case 2 (lxcfs-5.0.2 fuse2 on rockylinux 8.7)

```bash
$ gdb /usr/local/bin/lxcfs /data0/lxcfs/core.lxcfs.0.1d91adb8092f4bee91b7555e1497bbca.54606.1723315511000000
GNU gdb (GDB) Rocky Linux 8.2-20.el8.0.1
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-redhat-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/local/bin/lxcfs...done.
[New LWP 2259601]
[New LWP 54606]
[New LWP 54632]
[New LWP 2168244]
[New LWP 2259604]
[New LWP 2259612]
[New LWP 2259613]
[New LWP 2259616]
[New LWP 2259619]
[New LWP 2259625]
[New LWP 2259630]
[New LWP 2259638]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
Core was generated by `/usr/local/bin/lxcfs /var/lib/lxcfs/ --enable-cfs --enable-pidfd --enable-loada'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0  _IO_vsnprintf (string=0x0, maxlen=<optimized out>, format=0x7f9d8da425d3 "%s", args=args@entry=0x7f9cc3ffe710) at vsnprintf.c:112
112	  string[0] = '\0';
[Current thread is 1 (Thread 0x7f9cc3fff700 (LWP 2259601))]
(gdb) set pagination off
(gdb) bt full
#0  _IO_vsnprintf (string=0x0, maxlen=<optimized out>, format=0x7f9d8da425d3 "%s", args=args@entry=0x7f9cc3ffe710) at vsnprintf.c:112
        sf = {f = {_sbf = {_f = {_flags = -72515584, _IO_read_ptr = 0x0, _IO_read_end = 0x0, _IO_read_base = 0x0, _IO_write_base = 0x0, _IO_write_ptr = 0x0, _IO_write_end = 0x0, _IO_buf_base = 0x0, _IO_buf_end = 0x0, _IO_save_base = 0x0, _IO_backup_base = 0x0, _IO_save_end = 0x0, _markers = 0x0, _chain = 0x0, _fileno = 0, _flags2 = 128, _old_offset = 140314649123093, _cur_column = 0, _vtable_offset = -1 '\377', _shortbuf = <incomplete sequence \303>, _lock = 0x0, _offset = 140312214077441, _codecvt = 0x7f9d8d8422ed <check_match+109>, _wide_data = 0xffffffffffffffff, _freeres_list = 0x0, _freeres_buf = 0x7f9cc3ffe704, __pad5 = 140314651861152, _mode = -1, _unused2 = "\000\000\000\000\220\r\000P\233\177\000\000\000\004\000\000\000\000\000"}, vtable = 0x7f9d8cfb20a0 <_IO_strn_jumps>}, _s = {_allocate_buffer_unused = 0x15, _free_buffer_unused = 0xf0000109}}, overflow_buf = "\001\000\000\000\000\000\000\000$\201", '\000' <repeats 31 times>, "\004", '\000' <repeats 14 times>, "\236U\263f\000\000\000"}
        ret = <optimized out>
#1  0x00007f9d8cc64ab3 in __GI___snprintf (s=<optimized out>, maxlen=<optimized out>, format=<optimized out>) at snprintf.c:33
        arg = {{gp_offset = 24, fp_offset = 48, overflow_arg_area = 0x7f9cc3ffe7f0, reg_save_area = 0x7f9cc3ffe730}}
        done = <optimized out>
#2  0x00007f9d8da3d7be in read_file_fuse (path=0x7f9d8da412b9 "/proc/meminfo", buf=0x7f9b50006720 "MemTotal:       251396336 kB\nMemFree:        251344560 kB\nMemAvailable:   251347404 kB\nBuffers:", ' ' <repeats 15 times>, "0 kB\nCached:", ' ' <repeats 13 times>, "2844 kB\nSwapCached:", ' ' <repeats 12 times>, "0 kB\nActive:", ' ' <repeats 13 times>, "2864 kB\nI"..., size=8191, d=0x7f9cb002b010) at ../src/utils.c:312
        l = 140311279954032
        line = 0x7f9b50004770 "MemTotal:       263454960 kB\n"
        f = 0x7f9b50000d90
        linelen = 120
        total_len = 0
        cache = 0x0
        cache_size = 1942
        __func__ = "read_file_fuse"
#3  0x00007f9d8da3630b in proc_meminfo_read (buf=0x7f9b50006720 "MemTotal:       251396336 kB\nMemFree:        251344560 kB\nMemAvailable:   251347404 kB\nBuffers:", ' ' <repeats 15 times>, "0 kB\nCached:", ' ' <repeats 13 times>, "2844 kB\nSwapCached:", ' ' <repeats 12 times>, "0 kB\nActive:", ' ' <repeats 13 times>, "2864 kB\nI"..., size=8191, offset=0, fi=0x7f9cc3ffecd0) at ../src/proc_fuse.c:1244
        cgroup = 0x0
        line = 0x0
        memusage_str = 0x0
        memswusage_str = 0x0
        memswpriority_str = 0x0
        fopen_cache = 0x0
        f = 0x0
        fc = 0x7f9b50002ba0
        wants_swap = false
        d = 0x7f9cb002b010
        memlimit = 0
        memusage = 0
        hosttotal = 0
        swfree = 0
        swusage = 0
        swtotal = 0
        memswpriority = 1
        mstat = {hierarchical_memory_limit = 0, hierarchical_memsw_limit = 0, total_cache = 0, total_rss = 0, total_rss_huge = 0, total_shmem = 0, total_mapped_file = 0, total_dirty = 0, total_writeback = 0, total_swap = 0, total_pgpgin = 0, total_pgpgout = 0, total_pgfault = 0, total_pgmajfault = 0, total_inactive_anon = 0, total_active_anon = 0, total_inactive_file = 0, total_active_file = 0, total_unevictable = 0}
        linelen = 0
        total_len = 0
        cache = 0x0
        cache_size = 1942
        ret = 1667723888
        initpid = 2267284
        __func__ = "proc_meminfo_read"
#4  0x00007f9d8da378b2 in proc_read (path=0x7f9b50000c30 "/proc/meminfo", buf=0x7f9b50006720 "MemTotal:       251396336 kB\nMemFree:        251344560 kB\nMemAvailable:   251347404 kB\nBuffers:", ' ' <repeats 15 times>, "0 kB\nCached:", ' ' <repeats 13 times>, "2844 kB\nSwapCached:", ' ' <repeats 12 times>, "0 kB\nActive:", ' ' <repeats 13 times>, "2864 kB\nI"..., size=8191, offset=0, fi=0x7f9cc3ffecd0) at ../src/proc_fuse.c:1511
        f = 0x7f9cb002b010
#5  0x000056360c2f6ef7 in do_proc_read (path=0x7f9b50000c30 "/proc/meminfo", buf=0x7f9b50006720 "MemTotal:       251396336 kB\nMemFree:        251344560 kB\nMemAvailable:   251347404 kB\nBuffers:", ' ' <repeats 15 times>, "0 kB\nCached:", ' ' <repeats 13 times>, "2844 kB\nSwapCached:", ' ' <repeats 12 times>, "0 kB\nActive:", ' ' <repeats 13 times>, "2864 kB\nI"..., size=8191, offset=0, fi=0x7f9cc3ffecd0) at ../src/lxcfs.c:272
        error = 0x0
        __proc_read = 0x7f9d8da37836 <proc_read>
        __func__ = "do_proc_read"
#6  0x000056360c2f8558 in lxcfs_read (path=0x7f9b50000c30 "/proc/meminfo", buf=0x7f9b50006720 "MemTotal:       251396336 kB\nMemFree:        251344560 kB\nMemAvailable:   251347404 kB\nBuffers:", ' ' <repeats 15 times>, "0 kB\nCached:", ' ' <repeats 13 times>, "2844 kB\nSwapCached:", ' ' <repeats 12 times>, "0 kB\nActive:", ' ' <repeats 13 times>, "2864 kB\nI"..., size=8191, offset=0, fi=0x7f9cc3ffecd0) at ../src/lxcfs.c:839
        ret = 0
#7  0x00007f9d8d400537 in fuse_fs_read_buf (fs=0x56360df91aa0, path=0x7f9b50000c30 "/proc/meminfo", bufp=bufp@entry=0x7f9cc3ffec30, size=size@entry=8191, off=off@entry=0, fi=fi@entry=0x7f9cc3ffecd0) at fuse.c:1792
        buf = <optimized out>
        mem = <optimized out>
        res = <optimized out>
#8  0x00007f9d8d400712 in fuse_lib_read (req=0x7f9b50001220, ino=4, size=8191, off=0, fi=0x7f9cc3ffecd0) at fuse.c:3250
        d = {id = 18446744073709551536, cond = {__data = {__lock = 2, __futex = 0, __total_seq = 214748364809, __wakeup_seq = 532575944795, __woken_seq = 0, __mutex = 0x0, __nwaiters = 0, __broadcast_seq = 0}, __size = "\002\000\000\000\000\000\000\000\t\000\000\000\062\000\000\000[\000\000\000|", '\000' <repeats 26 times>, __align = 2}, finished = 119}
        f = 0x56360df91940
        buf = 0x7f9b500012b0
        path = 0x7f9b50000c30 "/proc/meminfo"
        res = <optimized out>
#9  0x00007f9d8d4090ce in do_read (req=<optimized out>, nodeid=<optimized out>, inarg=<optimized out>) at fuse_lowlevel.c:1232
        fi = {flags = 32768, fh_old = 140310944591888, writepage = 0, direct_io = 0, keep_cache = 0, flush = 0, nonseekable = 0, flock_release = 0, padding = 0, fh = 140310944591888, lock_owner = 3740103517284196512}
        arg = <optimized out>
#10 0x00007f9d8d409b6b in fuse_ll_process_buf (data=0x56360df91c30, buf=0x7f9cc3ffeea0, ch=<optimized out>) at fuse_lowlevel.c:2441
        f = 0x56360df91c30
        bufv = {count = 1, idx = 0, off = 0, buf = {{size = 48, flags = (unknown: 0), mem = 0x7f9bf4000de0, fd = 0, pos = 0}}}
        tmpbuf = {count = 1, idx = 0, off = 0, buf = {{size = 80, flags = (unknown: 0), mem = 0x0, fd = -1, pos = 0}}}
        in = 0x7f9bf4000de0
        inarg = 0x7f9bf4000e08
        req = <optimized out>
        mbuf = 0x0
        err = <optimized out>
        res = <optimized out>
#11 0x00007f9d8d406401 in fuse_do_work (data=0x7f9ccc002b70) at fuse_loop_mt.c:117
        isforget = 0
        ch = 0x56360df916a0
        fbuf = {size = 48, flags = (unknown: 0), mem = 0x7f9bf4000de0, fd = 0, pos = 0}
        res = <optimized out>
        w = 0x7f9ccc002b70
        mt = 0x7ffe50b96280
#12 0x00007f9d8cfc31cf in start_thread (arg=<optimized out>) at pthread_create.c:479
        ret = <optimized out>
        pd = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140311279957760, 7529743667701061605, 140314090134606, 140314090134607, 140314090134736, 140311279955904, -7546201157206435867, -7546876285721274395}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
#13 0x00007f9d8cc2ee73 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
No locals.
(gdb) quit
```

# Steps to reproduce

randomly crashed

# Information to attach

 - [x] any relevant kernel output (`dmesg`)
```
# case 1
[Thu Aug  8 14:31:39 2024] lxcfs[714018]: segfault at 0 ip 00007f6fb4a94861 sp 00007f6f0a7fb6c0 error 6 in libc.so.6[7f6fb4a28000+175000] likely on CPU 129 (core 15, socket 1)
[Thu Aug  8 14:31:39 2024] Code: 00 00 4c 89 ef 4c 89 4c 24 08 e8 3a 51 00 00 48 89 e9 4c 89 e2 48 89 ee 48 8d 05 8a 2a 16 00 4c 89 ef 48 89 84 24 e8 00 00 00 <c6> 45 00 00 e8 f6 63 00 00 89 d9 4c 89 fa 4c 89 f6 4c 89 ef e8 96

# case 2
[Sun Aug 11 02:42:06 2024] lxcfs[2259601]: segfault at 0 ip 00007f9d8cc8531d sp 00007f9cc3ffe5a0 error 6 in libc-2.28.so[7f9d8cbf5000+1bc000]
[Sun Aug 11 02:42:06 2024] Code: ba ff ff ff ff be 00 80 00 00 e8 8e 53 00 00 48 89 df 48 89 e9 4c 89 e2 48 8d 05 8e cd 32 00 48 89 ee 48 89 84 24 d8 00 00 00 <c6> 45 00 00 e8 3a 68 00 00 48 89 df 4c 89 f2 4c 89 ee e8 9c 67 fd
```
 - [x] LXCFS daemon output / logs: see `Required information`
 - [x] LXCFS configuration (Which options were used to start a LXCFS daemon: `ps aux | grep lxcfs`)  see `Required information`
 - [x] in case of crash, a core dump (please, read [how to collect a core dump](https://github.com/lxc/lxcfs?tab=readme-ov-file#core-dump)): see `Required information`
   - [core.lxcfs.0.87a60023a4904073b7dddd36c60387e7.20905.1723098716000000.zst.gz](https://github.com/user-attachments/files/16578222/core.lxcfs.0.87a60023a4904073b7dddd36c60387e7.20905.1723098716000000.zst.gz)
   - [core.lxcfs.0.1d91adb8092f4bee91b7555e1497bbca.54606.1723315511000000.lz4.gz](https://github.com/user-attachments/files/16578224/core.lxcfs.0.1d91adb8092f4bee91b7555e1497bbca.54606.1723315511000000.lz4.gz)



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lxcfs terminated with signal SIGSEGV #656

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Issue description

case 1 (lxcfs-5.0.2 fuse2 on almalinux 9.3)

case 2 (lxcfs-5.0.2 fuse2 on rockylinux 8.7)

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case 3 (lxcfs-5.0.2 fuse2 on almalinux 9.3)

case 4: double free or corruption (fasttop) (lxcfs-5.0.2 fuse2 on rockylinux 8.7)

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lxcfs terminated with signal SIGSEGV #656

Description

Required information

Issue description

case 1 (lxcfs-5.0.2 fuse2 on almalinux 9.3)

case 2 (lxcfs-5.0.2 fuse2 on rockylinux 8.7)

Steps to reproduce

Information to attach

Activity

mchtech commented on Aug 17, 2024

case 3 (lxcfs-5.0.2 fuse2 on almalinux 9.3)

mchtech commented on Sep 27, 2024

case 4: double free or corruption (fasttop) (lxcfs-5.0.2 fuse2 on rockylinux 8.7)

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