ghc_ticker loops if permission denied on timerfd

Using stack with lts-11.6 to compile a cgi programme, I got something that runs OK from the command line, but which goes into a busy loop when run from httpd. This is caused by selinux preventing read on the timer. Changing the selunix permissions solves the problems, but ghc-ticker ought to check whether the read succeeded and not try again if it fails.

Trac metadata

Trac field	Value
Version	8.2.2
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed milestone to %8.6.1

changed weight to 5

added Tbug Trac import labels

Attached file al3 (download).

Three lines from selinux audit log (shows successive attempts to read timer within same millisecond)

Trac metadata

Trac field	Value
Differential revisions	- → D4875

changed milestone to %8.8.1

These won't be addressed in GHC 8.6.

mentioned in commit c7b1e93b

closed

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

added runtime crash label

added Pnormal label