Hello!
Tomáš Čech <sleep_wal...@gnu.org> skribis:
> It seems to be easy to crash useradd (from shadow package).
Is it on GuixSD?
> from strace:
>
> read(3, "account required pam_deny.so \nau"..., 4096) = 223
> open("/gnu/store/2xmwkq2ycwk89xlxnvib5wnjaacfy0rg-linux-pam-1.2.1/lib/security/pam_deny.so",
> O_RDONLY|O_CLOEXEC) = 5
> read(5,
> "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\340\6\0\0\0\0\0\0"..., 832) =
> 832
> fstat(5, {st_mode=S_IFREG|0555, st_size=6728, ...}) = 0
> mmap(NULL, 2100200, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 5, 0) =
> 0x7fb8b447c000
> mprotect(0x7fb8b447d000, 2093056, PROT_NONE) = 0
> mmap(0x7fb8b467c000, 4096, PROT_READ|PROT_WRITE,
> MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 5, 0) = 0x7fb8b467c000
> close(5) = 0
> --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x7fb8b3d1bda8}
> ---
Could you check in the ‘strace’ output whether PAM modules build with
another libc are being loaded?
Thanks for your report!
Ludo’.
