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Change type of the prot parameter for kern_vm_mmap() from vm_prot_t to int.

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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
This commit is contained in:
Konstantin Belousov 2017-02-11 20:27:39 +00:00
parent 272a2acfef
commit 1c2ad3e962
2 changed files with 2 additions and 2 deletions
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2
sys/vm/vm_extern.h
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@ -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,

2
sys/vm/vm_mmap.c
View File

@ -196,7 +196,7 @@ sys_mmap(struct thread *td, struct mmap_args *uap)
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;