diff options
| -rw-r--r-- | sys/kern/kern_subr.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/sys/kern/kern_subr.c b/sys/kern/kern_subr.c index f437ec7..8a08f33 100644 --- a/sys/kern/kern_subr.c +++ b/sys/kern/kern_subr.c @@ -29,9 +29,12 @@ #include <sys/proc.h> #include <sys/types.h> +#include <sys/param.h> #include <sys/errno.h> +#include <sys/mman.h> #include <sys/exec.h> #include <sys/systm.h> +#include <vm/vm.h> #include <string.h> /* @@ -45,6 +48,8 @@ static bool check_uaddr(const void *uaddr) { vaddr_t stack_start, stack_end; + struct mmap_lgdr *lp; + struct mmap_entry find, *res; struct exec_prog exec; struct proc *td; uintptr_t addr; @@ -61,6 +66,22 @@ check_uaddr(const void *uaddr) if (addr >= stack_start && addr <= stack_end) return true; + /* Try to grab the mmap ledger */ + if ((lp = td->mlgdr) == NULL) { + return false; + } + + /* + * Now give an attempt at looking through the + * mmap ledger. Perhaps this memory was allocated + * in the user heap? + */ + find.va_start = ALIGN_DOWN(addr, DEFAULT_PAGESIZE); + res = RBT_FIND(lgdr_entries, &lp->hd, &find); + if (res != NULL) { + return true; + } + return false; } |