Author: kib
Date: Sat Feb 11 20:27:39 2017
New Revision: 313655
URL: https://svnweb.freebsd.org/changeset/base/313655
Log:
Change type of the prot parameter for kern_vm_mmap() from vm_prot_t to int.
This makes the code to pass whole word of the mmap(2) syscall argument
prot to the syscall helper kern_vm_mmap(), which can validate all
bits. The change provides temporal fix for sys/vm/mmap_test
mmap__bad_arguments, which was broken after r313352.
PR: 216976
Reported and tested by: ngie
Sponsored by: The FreeBSD Foundation
Modified:
head/sys/vm/vm_extern.h
head/sys/vm/vm_mmap.c
Modified: head/sys/vm/vm_extern.h
==============================================================================
--- head/sys/vm/vm_extern.h Sat Feb 11 20:27:06 2017 (r313654)
+++ head/sys/vm/vm_extern.h Sat Feb 11 20:27:39 2017 (r313655)
@@ -72,7 +72,7 @@ void kmem_init_zero_region(void);
void kmeminit(void);
int kern_vm_mmap(struct thread *td, vm_offset_t addr, vm_size_t size,
- vm_prot_t prot, int flags, int fd, off_t pos);
+ int prot, int flags, int fd, off_t pos);
int kern_vm_mprotect(struct thread *td, vm_offset_t addr, vm_size_t size,
vm_prot_t prot);
int kern_vm_msync(struct thread *td, vm_offset_t addr, vm_size_t size,
Modified: head/sys/vm/vm_mmap.c
==============================================================================
--- head/sys/vm/vm_mmap.c Sat Feb 11 20:27:06 2017 (r313654)
+++ head/sys/vm/vm_mmap.c Sat Feb 11 20:27:39 2017 (r313655)
@@ -196,7 +196,7 @@ sys_mmap(struct thread *td, struct mmap_
int
kern_vm_mmap(struct thread *td, vm_offset_t addr, vm_size_t size,
- vm_prot_t prot, int flags, int fd, off_t pos)
+ int prot, int flags, int fd, off_t pos)
{
struct file *fp;
vm_size_t pageoff;
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