Re: [PATCH] mmap: add sysctl for controlling ~VM_MAYEXEC taint

[Roland McGrath]

On Tue, Aug 16, 2011 at 2:33 AM, Mel Gorman <mel@xxxxxxxxx> wrote:
> Is using shm_open()+mmap instead of open()+mmap() to open a file on
> /dev/shm really that difficult?
>
> int shm_open(const char *name, int oflag, mode_t mode);
> int open(const char *pathname, int flags, mode_t mode);

I cannot figure out the rationale behind this question at all.
Both of these library functions result in the same system call.

> An ordinary user is not going to know that a segfault from an
> application can be fixed with this sysctl. This looks like something
> that should be fixed in the library so that it can work on kernels
> that do not have the sysctl.

I think the expectation is that the administrator or system builder
who decides to set the (non-default) noexec mount option will also
set the sysctl at the same time.


Thanks,
Roland
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/