PR/57831 CVS commit: src/lib/libpthread

["Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>]

The following reply was made to PR lib/57831; it has been noted by GNATS.

From: "Juergen Hannken-Illjes" <hannken%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/57831 CVS commit: src/lib/libpthread
Date: Sat, 8 Jun 2024 08:01:49 +0000

 Module Name:	src
 Committed By:	hannken
 Date:		Sat Jun  8 08:01:49 UTC 2024
 
 Modified Files:
 	src/lib/libpthread: pthread.c
 
 Log Message:
 Fix resource leak in pthread_create().  Pthread field "pt_lwpctl"
 must not be accessed after _lwp_exit() as the kernel may free
 it, attach it to another thread and change its "lc_curcpu".
 
 The "pthread__deadqueue" will fill up with pthreads with
 an invalid "pt_lwpctl" and allocated stack that never get
 reused.
 
 Replace the test "lc_curcpu == LWPCTL_CPU_EXITED" with
 test "_lwp_kill(newthread->pt_lid, 0) == -1 && errno == ESRCH"
 to make sure this thread has finished its _lwp_exit().
 
 PR lib/57831 "Memory leaks in libpthread/libc"
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.184 -r1.185 src/lib/libpthread/pthread.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.