The patch titled
Subject: memfd_secret: use unsigned int rather than long as syscall flags type
has been added to the -mm tree. Its filename is
secretmem-test-add-basic-selftest-for-memfd_secret2-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/secretmem-test-add-basic-selftest-for-memfd_secret2-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/secretmem-test-add-basic-selftest-for-memfd_secret2-fix.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Subject: memfd_secret: use unsigned int rather than long as syscall flags type
Yuri Norov says:
If parameter size is the same for native and compat ABIs, we may
wire a syscall made by compat client to native handler. This is
true for unsigned int, but not true for unsigned long or pointer.
That's why I suggest using unsigned int and so avoid creating compat
entry point.
Use unsigned int as the type of the flags parameter in memfd_secret()
system call.
Link: https://lkml.kernel.org/r/20210331142345.27532-1-rppt@xxxxxxxxxx
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxxxxx>
Acked-by: David Hildenbrand <david@xxxxxxxxxx>
Acked-by: Yury Norov <yury.norov@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/memfd_secret.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/tools/testing/selftests/vm/memfd_secret.c~secretmem-test-add-basic-selftest-for-memfd_secret2-fix
+++ a/tools/testing/selftests/vm/memfd_secret.c
@@ -38,7 +38,7 @@ static unsigned long page_size;
static unsigned long mlock_limit_cur;
static unsigned long mlock_limit_max;
-static int memfd_secret(unsigned long flags)
+static int memfd_secret(unsigned int flags)
{
return syscall(__NR_memfd_secret, flags);
}
_
Patches currently in -mm which might be from rppt@xxxxxxxxxxxxx are
nds32-flush_dcache_page-use-page_mapping_file-to-avoid-races-with-swapoff.patch
mm-cma-rename-pf_memalloc_nocma-to-pf_memalloc_pin-fix.patch
mmap-make-mlock_future_check-global.patch
riscv-kconfig-make-direct-map-manipulation-options-depend-on-mmu.patch
set_memory-allow-set_direct_map__noflush-for-multiple-pages.patch
set_memory-allow-querying-whether-set_direct_map_-is-actually-enabled.patch
mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas.patch
mm-introduce-memfd_secret-system-call-to-create-secret-memory-areas-fix.patch
pm-hibernate-disable-when-there-are-active-secretmem-users.patch
arch-mm-wire-up-memfd_secret-system-call-where-relevant.patch
arch-mm-wire-up-memfd_secret-system-call-where-relevant-fix.patch
secretmem-test-add-basic-selftest-for-memfd_secret2.patch
secretmem-test-add-basic-selftest-for-memfd_secret2-fix.patch
