PR/60556 CVS commit: src/sys/kern

The following reply was made to PR port-amd64/60556; it has been noted by GNATS.

From: "Taylor R Campbell" <[email protected]>
To: [email protected]
Cc: 
Subject: PR/60556 CVS commit: src/sys/kern
Date: Sat, 8 Aug 2026 00:45:53 +0000

 Module Name:	src
 Committed By:	riastradh
 Date:		Sat Aug  8 00:45:53 UTC 2026
 
 Modified Files:
 	src/sys/kern: sys_process_lwpstatus.c
 
 Log Message:
 ptrace/procfs: Take lwp lock around process_read/write_(fp)regs(32).
 
 And verify that the lwp is in LSSTOP state before trying to read.
 Otherwise, we might catch an lwp while it's still running on the CPU,
 with all FPU state active, making the result unstable and tripping
 assertions on some architectures.
 
 PR port-amd64/60556: panic in process_read_fpregs_xmm
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.5 -r1.6 src/sys/kern/sys_process_lwpstatus.c
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.