Opened 9 years ago
Closed 9 years ago
#1232 closed defect (fixed)
signal handling smashes memory management
| Reported by: | joergw | Owned by: | |
|---|---|---|---|
| Priority: | critical | Milestone: | 4.11.0 |
| Component: | core libraries | Version: | 4.10.x |
| Keywords: | signal handling, runtime | Cc: | |
| Estimated difficulty: |
Description
The signal handler stores a references relative (1000 words off) to the stack pointer of in effect during signal handlers invocation.
This may result in an overflow (if the stack pointer happens to be close to the border of the virtual address space.
It does (reproducible) set C_stack_limit to some point within the stack of unrelated pthreads. And, if many signals are dispatched, does overwrite saved_stack_limit.
See also http://lists.nongnu.org/archive/html/chicken-hackers/2015-12/msg00006.html
Patch attached.
Attachments (1)
Change History (3)
Changed 9 years ago by
| Attachment: | 0008-Allowsignalhandlerstobedispatchedtomultiplethreads.patch added |
|---|
comment:1 Changed 9 years ago by
| Milestone: | someday → 4.11.0 |
|---|
comment:2 Changed 9 years ago by
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
Patch applied as 8294683 (master) and 169cb27 (chicken-5)
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Patch allowing signal handlers to be dispatched to any pthread