From 8614d6c5eda005ad72b37afeaae2879d7c101b18 Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Mon, 5 Dec 2022 18:30:07 +0100 Subject: mm: do not show fs mm pc for VM_LOCKONFAULT pages When VM_LOCKONFAULT was added, /proc/PID/smaps wasn't hooked up to it, so looking at /proc/PID/smaps, it shows '??' instead of something intelligable. This can be reached by userspace by simply calling `mlock2(..., MLOCK_ONFAULT);`. Fix this by adding "lf" to denote VM_LOCKONFAULT. Link: https://lkml.kernel.org/r/20221205173007.580210-1-Jason@zx2c4.com Fixes: de60f5f10c58 ("mm: introduce VM_LOCKONFAULT") Signed-off-by: Jason A. Donenfeld Acked-by: Vlastimil Babka Cc: Eric B Munson Cc: Kirill A. Shutemov Signed-off-by: Andrew Morton --- fs/proc/task_mmu.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs') diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c index 89338950afd3..e35a0398db63 100644 --- a/fs/proc/task_mmu.c +++ b/fs/proc/task_mmu.c @@ -674,6 +674,7 @@ static void show_smap_vma_flags(struct seq_file *m, struct vm_area_struct *vma) [ilog2(VM_RAND_READ)] = "rr", [ilog2(VM_DONTCOPY)] = "dc", [ilog2(VM_DONTEXPAND)] = "de", + [ilog2(VM_LOCKONFAULT)] = "lf", [ilog2(VM_ACCOUNT)] = "ac", [ilog2(VM_NORESERVE)] = "nr", [ilog2(VM_HUGETLB)] = "ht", -- cgit v1.2.3