Package: uidmap Version: 1:4.11.1+dfsg1-2 Severity: normal File: /usr/bin/getsubids
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 With: $ grep ^subid: /etc/nsswitch.conf subid: sss I get: $ getsubids sam Segmentation fault (core dumped) GDB reveals that this is happening while handling the failure to open libsubid_sss.so: (gdb) where #0 __vfprintf_internal (s=0x0, format=0x7ffff7f94872 "Error opening %s: %s\n", ap=ap@entry=0x7fffffffdbd0, mode_flags=mode_flags@entry=2) at ./stdio-common/vfprintf-internal.c:1359 #1 0x00007ffff7d1751f in ___fprintf_chk (fp=<optimized out>, flag=flag@entry=1, format=format@entry=0x7ffff7f94872 "Error opening %s: %s\n") at ./debug/fprintf_chk.c:33 #2 0x00007ffff7f8318e in fprintf (__fmt=0x7ffff7f94872 "Error opening %s: %s\n", __stream=<optimized out>) at /usr/include/x86_64-linux-gnu/bits/stdio2.h:105 #3 nss_init (nsswitch_path=0x7ffff7f94820 "/etc/nsswitch.conf", nsswitch_path@entry=0x0) at ./lib/nss.c:94 #4 0x00007ffff7f831bb in get_subid_nss_handle () at ./lib/nss.c:148 #5 0x00007ffff7f852db in list_owner_ranges (owner=owner@entry=0x7fffffffe2a6 "sam", id_type=id_type@entry=ID_TYPE_UID, in_ranges=in_ranges@entry=0x7fffffffddd0) at ./lib/subordinateio.c:776 #6 0x00007ffff7f7efad in get_subid_ranges (ranges=0x7fffffffddd0, id_type=ID_TYPE_UID, owner=owner@entry=0x7fffffffe2a6 "sam") at ./libsubid/api.c:48 #7 0x000055555555514f in main (argc=2, argv=0x7fffffffdf18) at ./src/getsubids.c:38 (gdb) l 89 goto done; 90 } 91 snprintf(libname, 64, "libsubid_%s.so", token); 92 h = dlopen(libname, RTLD_LAZY); 93 if (!h) { 94 fprintf(shadow_logfd, "Error opening %s: %s\n", libname, dlerror()); 95 fprintf(shadow_logfd, "Using files\n"); 96 subid_nss = NULL; 97 goto done; 98 } (gdb) p libname $1 = "libsubid_sss.so", '\000' <repeats 49 times> (gdb) p shadow_logfd $2 = (FILE *) 0x7ffff7df3680 <_IO_2_1_stderr_> (gdb) p dlerror() $3 = 0x0 Looks like dlerror is returning NULL which causes the crash. - -- System Information: Debian Release: bookworm/sid APT prefers testing APT policy: (530, 'testing'), (520, 'unstable'), (1, 'experimental') merged-usr: no Architecture: amd64 (x86_64) Kernel: Linux 5.19.0-1-amd64 (SMP w/2 CPU threads; PREEMPT) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages uidmap depends on: ii libaudit1 1:3.0.7-1+b1 ii libc6 2.34-7 ii libselinux1 3.4-1+b1 ii libsubid4 1:4.11.1+dfsg1-2 uidmap recommends no packages. uidmap suggests no packages. - -- no debconf information -----BEGIN PGP SIGNATURE----- iIgEARYIADAWIQTWOGqGn6HETecdzqZOEaKLhlAYigUCYyQ5YxIcc2FtQHJvYm90 cy5vcmcudWsACgkQThGii4ZQGIo6aAD/ZVNMtggK8Tvo0OcKDjaIgT9Gv5cBYflG ymusOSHQ2X4A/1+aBe0EfugsEePoyn2golGRMn44gDj4z9Sk5rrJKKoF =12CG -----END PGP SIGNATURE-----