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authorJason A. Donenfeld <Jason@zx2c4.com>2022-12-05 18:30:07 +0100
committerAndrew Morton <akpm@linux-foundation.org>2022-12-11 18:12:21 -0800
commit8614d6c5eda005ad72b37afeaae2879d7c101b18 (patch)
tree0d710df89a23714a4f54dac444e8148ba84ef07e /fs/proc
parent9d789c3b4170574baa4242dd8cae5988cf97d48d (diff)
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 <Jason@zx2c4.com> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Eric B Munson <emunson@akamai.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'fs/proc')
-rw-r--r--fs/proc/task_mmu.c1
1 files changed, 1 insertions, 0 deletions
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",