diff options
Diffstat (limited to 'main/musl/0006-prevent-allocs-than-PTRDIFF_MAX-via-mremap.patch')
| -rw-r--r-- | main/musl/0006-prevent-allocs-than-PTRDIFF_MAX-via-mremap.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/main/musl/0006-prevent-allocs-than-PTRDIFF_MAX-via-mremap.patch b/main/musl/0006-prevent-allocs-than-PTRDIFF_MAX-via-mremap.patch new file mode 100644 index 0000000000..d373ac9114 --- /dev/null +++ b/main/musl/0006-prevent-allocs-than-PTRDIFF_MAX-via-mremap.patch @@ -0,0 +1,39 @@ +From f9ecb6bfa1dc9f93a10dad97a158e6b8334c586c Mon Sep 17 00:00:00 2001 +From: Daniel Micay <danielmicay@gmail.com> +Date: Sat, 31 Oct 2015 05:14:45 -0400 +Subject: [PATCH] prevent allocs than PTRDIFF_MAX via mremap + +It's quite feasible for this to happen via MREMAP_MAYMOVE. +--- + src/mman/mremap.c | 9 ++++++++- + 1 file changed, 8 insertions(+), 1 deletion(-) + +diff --git a/src/mman/mremap.c b/src/mman/mremap.c +index 596c45f..1096ace 100644 +--- a/src/mman/mremap.c ++++ b/src/mman/mremap.c +@@ -1,5 +1,7 @@ + #include <unistd.h> + #include <sys/mman.h> ++#include <errno.h> ++#include <stdint.h> + #include <stdarg.h> + #include "syscall.h" + #include "libc.h" +@@ -8,7 +10,12 @@ void *__mremap(void *old_addr, size_t old_len, size_t new_len, int flags, ...) + { + va_list ap; + void *new_addr; +- ++ ++ if (new_len >= PTRDIFF_MAX) { ++ errno = ENOMEM; ++ return MAP_FAILED; ++ } ++ + va_start(ap, flags); + new_addr = va_arg(ap, void *); + va_end(ap); +-- +2.7.0 + |