Re: [Valgrind-users] Fwd: Valgrind crashes with: FATAL: aspacem assertion failed: addr <= addr + len - 1

[John R. <jr...@bi...>]

> The assert in question seems to be this:
> 
> 
> static void add_mapping_callback(Addr addr, SizeT len, UInt prot, 
>                                  ULong dev, ULong ino, Off64T offset, 
>                                  const UChar *filename)
> {
>    // derived from sync_check_mapping_callback()
> 
>    Int iLo, iHi, i;
> 
>    if (len == 0) return;
> 
>    /* The kernel should not give us wraparounds. */
>    aspacem_assert(addr <= addr + len - 1); 

The most likely candidate for triggering the assert()
is if 'len' is -1: MAP_FAILED, or the C library returning -1
when some bare system call returns -ENOMEM, -ENOSPC,
-EINTR, etc., and there was no prior check for that error.

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