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fixup! [LibOS] return error on munmap()/mprotect() for outside of user address

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This commit is contained in:
Isaku Yamahata
2020-02-24 11:39:21 -08:00
parent 32a008dee7
commit cbfbf96497
1 changed files with 2 additions and 3 deletions
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LibOS/shim/src/sys/shim_mmap.c
+2 -3
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@@ -35,9 +35,8 @@
DEFINE_PROFILE_OCCURENCE(mmap, memory);
static bool completely_within_user_address(void* addr, size_t length) {
/* the caller already tested access_ok() */
return /* access_ok(addr, length) && */
PAL_CB(user_address.start) <= addr && addr + length <= PAL_CB(user_address.end);
/* the caller already tested access_ok(), so we can safely perform addr + length */
return PAL_CB(user_address.start) <= addr && addr + length <= PAL_CB(user_address.end);
}
void* shim_do_mmap(void* addr, size_t length, int prot, int flags, int fd, off_t offset) {