The patch titled
Subject: revert "memfd: improve userspace warnings for missing exec-related flags".
has been added to the -mm mm-unstable branch. Its filename is
revert-memfd-improve-userspace-warnings-for-missing-exec-related-flags.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/revert-memfd-improve-userspace-warnings-for-missing-exec-related-flags.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: revert "memfd: improve userspace warnings for missing exec-related flags".
Date: Sat Sep 2 03:59:31 PM PDT 2023
This warning is telling userspace developers to pass MFD_EXEC and
MFD_NOEXEC_SEAL to memfd_create(). Commit 434ed3350f57 ("memfd: improve
userspace warnings for missing exec-related flags") made the warning more
frequent and visible in the hope that this would accelerate the fixing of
errant userspace.
But the overall effect is to generate far too much dmesg noise.
Fixes: 434ed3350f57 memfd: improve userspace warnings for missing exec-related flags
Reported-by: Damian Tometzki <dtometzki@xxxxxxxxxxxxxxxxx>
Closes: https://lkml.kernel.org/r/ZPFzCSIgZ4QuHsSC@xxxxxxxxxxxxxxxx
Cc: Aleksa Sarai <cyphar@xxxxxxxxxx>
Cc: Christian Brauner <brauner@xxxxxxxxxx>
Cc: Daniel Verkamp <dverkamp@xxxxxxxxxxxx>
Cc: Jeff Xu <jeffxu@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memfd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/mm/memfd.c~revert-memfd-improve-userspace-warnings-for-missing-exec-related-flags
+++ a/mm/memfd.c
@@ -316,7 +316,7 @@ SYSCALL_DEFINE2(memfd_create,
return -EINVAL;
if (!(flags & (MFD_EXEC | MFD_NOEXEC_SEAL))) {
- pr_info_ratelimited(
+ pr_warn_once(
"%s[%d]: memfd_create() called without MFD_EXEC or MFD_NOEXEC_SEAL set\n",
current->comm, task_pid_nr(current));
}
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
mm-shmem-fix-race-in-shmem_undo_range-w-thp-fix.patch
revert-memfd-improve-userspace-warnings-for-missing-exec-related-flags.patch
