diff mbox series

[v3,bpf-next,6/8] vmalloc: WARN for set_vm_flush_reset_perms() on huge pages

Message ID 20220520031548.338934-7-song@kernel.org (mailing list archive)
State Superseded
Delegated to: BPF
Headers show
Series bpf_prog_pack followup | expand

Checks

Context Check Description
bpf/vmtest-bpf-next-PR fail PR summary
bpf/vmtest-bpf-next-VM_Test-3 fail Logs for Kernel LATEST on z15 with gcc
bpf/vmtest-bpf-next-VM_Test-1 fail Logs for Kernel LATEST on ubuntu-latest with gcc
bpf/vmtest-bpf-next-VM_Test-2 fail Logs for Kernel LATEST on ubuntu-latest with llvm-15

Commit Message

Song Liu May 20, 2022, 3:15 a.m. UTC 
VM_FLUSH_RESET_PERMS is not yet ready for huge pages, add a WARN to
catch misuse soon.

Suggested-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Song Liu <song@kernel.org>
---
 include/linux/vmalloc.h | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index b159c2789961..5e0d0a60d9d5 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -238,6 +238,7 @@  static inline void set_vm_flush_reset_perms(void *addr)
 {
 	struct vm_struct *vm = find_vm_area(addr);
 
+	WARN_ON_ONCE(is_vm_area_hugepages(addr));
 	if (vm)
 		vm->flags |= VM_FLUSH_RESET_PERMS;
 }