On Fri, 16 Dec 2022 13:46:58 -0800 Jeff Xu <jeffxu@xxxxxxxxxx> wrote: > On Fri, Dec 16, 2022 at 12:35 PM Kees Cook <keescook@xxxxxxxxxxxx> wrote: > > > > On Fri, Dec 16, 2022 at 10:11:44AM -0800, Jeff Xu wrote: > > > Once per boot seems too little, it would be nice if we can list all processes. > > > I agree ratelimited might be too much. > > > There is a feature gap here for logging. > > > > > > Kees, what do you think ? > > > > I agree once per boot is kind of frustrating "I fixed the one warning, > > oh, now it's coming from a different process". But ratelimit is, in > > retrospect, still too often. > > > > Let's go with per boot -- this should be noisy "enough" to get the > > changes in API into the callers without being too much of a hassle. > > > Agreed. Let's go with per boot. > > Hi Andrew, what is your preference ? I can send a patch or you > directly fix it in mm-unstable ? Like this? --- a/mm/memfd.c~mm-memfd-add-mfd_noexec_seal-and-mfd_exec-fix-3 +++ a/mm/memfd.c @@ -308,7 +308,7 @@ SYSCALL_DEFINE2(memfd_create, flags |= MFD_NOEXEC_SEAL; break; default: - pr_warn_ratelimited( + pr_warn_once( "memfd_create(): MFD_NOEXEC_SEAL is enforced, pid=%d '%s'\n", task_pid_nr(current), get_task_comm(comm, current)); return -EINVAL; @@ -316,7 +316,7 @@ SYSCALL_DEFINE2(memfd_create, #else flags |= MFD_EXEC; #endif - pr_warn_ratelimited( + pr_warn_once( "memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=%d '%s'\n", task_pid_nr(current), get_task_comm(comm, current)); } _
