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| author | jhb <jhb@FreeBSD.org> | 2010-03-23 21:08:07 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2010-03-23 21:08:07 +0000 |
| commit | 399c01844ad297de82f83cc99f989358723baf51 (patch) | |
| tree | f24618d081cc374b0fccc722d1b306336d6a1030 /sys/vm/vm_mmap.c | |
| parent | d34fe86cb588bb8f80548a0a68036135b45eb07f (diff) | |
| download | FreeBSD-src-399c01844ad297de82f83cc99f989358723baf51.zip FreeBSD-src-399c01844ad297de82f83cc99f989358723baf51.tar.gz | |
Reject attempts to create a MAP_ANON mapping with a non-zero offset.
PR: kern/71258
Submitted by: Alexander Best
MFC after: 2 weeks
Diffstat (limited to 'sys/vm/vm_mmap.c')
| -rw-r--r-- | sys/vm/vm_mmap.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/sys/vm/vm_mmap.c b/sys/vm/vm_mmap.c index 4963a60..a47cd6a 100644 --- a/sys/vm/vm_mmap.c +++ b/sys/vm/vm_mmap.c @@ -233,7 +233,7 @@ mmap(td, uap) /* Make sure mapping fits into numeric range, etc. */ if ((uap->len == 0 && !SV_CURPROC_FLAG(SV_AOUT) && curproc->p_osrel >= 800104) || - ((flags & MAP_ANON) && uap->fd != -1)) + ((flags & MAP_ANON) && (uap->fd != -1 || pos != 0))) return (EINVAL); if (flags & MAP_STACK) { @@ -300,7 +300,6 @@ mmap(td, uap) handle = NULL; handle_type = OBJT_DEFAULT; maxprot = VM_PROT_ALL; - pos = 0; } else { /* * Mapping file, get fp for validation and |
