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
arch-mm-wire-up-memfd_secret-system-call-where-relevant-fix.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/arch-mm-wire-up-memfd_secret-system-call-where-relevant-fix.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/arch-mm-wire-up-memfd_secret-system-call-where-relevant-fix.patch
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------------------------------------------------------
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>
---
include/linux/syscalls.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/syscalls.h~arch-mm-wire-up-memfd_secret-system-call-where-relevant-fix
+++ a/include/linux/syscalls.h
@@ -1050,7 +1050,7 @@ asmlinkage long sys_landlock_create_rule
asmlinkage long sys_landlock_add_rule(int ruleset_fd, enum landlock_rule_type rule_type,
const void __user *rule_attr, __u32 flags);
asmlinkage long sys_landlock_restrict_self(int ruleset_fd, __u32 flags);
-asmlinkage long sys_memfd_secret(unsigned long flags);
+asmlinkage long sys_memfd_secret(unsigned int flags);
/*
* Architecture-specific system calls
_
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
