Skip to content

8368997: AIX allows reading from address zero which leads to several ubsan findings #27591

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
+8 −0
Closed

8368997: AIX allows reading from address zero which leads to several ubsan findings #27591

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 8 additions & 0 deletions src/hotspot/os/posix/safefetch_sigjmp.cpp
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,14 @@ ATTRIBUTE_NO_ASAN static bool _SafeFetchXX_internal(const T *adr, T* result) {

T n = 0;

#ifdef AIX
// AIX allows reading from nullptr without signalling
if (adr == nullptr) {
*result = 0;
return false;
}
#endif

// Set up a jump buffer. Anchor its pointer in TLS. Then read from the unsafe address.
// If that address was invalid, we fault, and in the signal handler we will jump back
// to the jump point.
Expand Down