Re: Fwd: mmap broken for sparc32 in 2.1.2pre3

[Ulrich Drepper <drepper@cygnus.com>]

Joel Klecker <jk@espy.org> writes:

> >mmap appears to fail in certain circumstances. This particular example
> >comes from a grep during a gcc build (just the tail of the strace):
> >
> >open("/usr/src/scratch/gcc-2.95.1/src/configure.in", O_RDONLY) = 4
> >brk(0x40000)                            = 0x40000
> >fstat(4, {st_dev=makedev(3, 1), st_ino=65761, st_mode=S_IFREG|0644, 
> >st_nlink=1,
> >st_uid=1000, st_gid=40, st_blksize=8192, st_blocks=76, st_size=37354,
> >st_atime=99/08/27-22:56:26, st_mtime=99/08/27-22:53:01, 
> >st_ctime=99/08/27-22:53:01}) = 0
> >mmap(NULL, 0, PROT_NONE, MAP_FILE, 0, 0) = -1 EINVAL (Invalid argument)

If the strace output is correct this is correct.  The allocated memory
is zero and to prevent some resource allocation attacks the kernel
blocks these calls and returns an error.

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