[PATCH] nptl: Fix SYSCALL_CANCEL for return values larger than INT_MAX (BZ 33245)

[Sam James]

Adhemerval Zanella <adhemerval.zanella@linaro.org> writes:

> The SYSCALL_CANCEL calls __syscall_cancel, which in turn
> calls __internal_syscall_cancel with an 'int' return instead of the
> expected 'long int'.  This causes issues with syscalls that return
> values larger than INT_MAX, such as copy_file_range [1].
>
> Checked on x86_64-linux-gnu.
>
> [1] https://debbugs.gnu.org/cgi/bugreport.cgi?bug=79139

The patch is OK:

Reviewed-by: Sam James <sam@gentoo.org>

> ---
>  nptl/cancellation.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

but I have a question about some other instances, though I didn't look
afresh yet today, just from last night.

Do we need something like the attached? I think the readlink one doesn't
actually matter because of path sizes.

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(Completely untested, it's just from the audit I did earlier.)

> [...]

sam