login segfaults

D. Hugh Redelmeier hugh at mimosa.com
Sun Feb 17 22:46:43 UTC 2008


On two of my machines, I can get login to segfault.  Is this expected?

To each of the prompts, I just type control-D

    [hugh at redex ~]$ login
    login: 
    login: 
    login: 
    Segmentation fault
    [hugh at redex ~]$ 

This behaviour was observed on F7 x86_64 and on FC5 i386.

The last things in an strace:

    open("/etc/passwd", O_RDONLY)           = 5
    fcntl(5, F_GETFD)                       = 0
    fcntl(5, F_SETFD, FD_CLOEXEC)           = 0
    fstat(5, {st_mode=S_IFREG|0644, st_size=1885, ...}) = 0
    mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2aaab0746000
    read(5, "root:x:0:0:root:/root:/bin/bash\n"..., 4096) = 1885
    --- SIGSEGV (Segmentation fault) @ 0 (0) ---




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