Stephen Rothwell writes:
> While investigating a bug report about a 64bit application that crashed in
> malloc, Paul Mackerras noticed that sys_rt_sigreturn's return value was
> "int". It needs to be "long" or else the return value of a syscall that
> is interrupted by a signal will be truncated to 32 bits and then sign
> extended. This causes .e.g mmap's return value to be corrupted if it is
> returning an address above 2^31 (which is what caused a SEGV in malloc).
> This problem obviously only affects 64 bit processes.
>
> Signed-off-by: Stephen Rothwell <[email protected]>
Acked-by: Paul Mackerras <[email protected]>
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