CVS commit: src/sys/uvm

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Fri Aug 14 03:02:41 UTC 2026

Modified Files:
        src/sys/uvm: uvm_map.c

Log Message:
sysctl vm.proc.*: Use p_reflock, not p_lock.

- Avoid holding p_lock across copyout; this risks deadlock or panic
  if memory is exhausted and the uvm fault handler during copyout
  tries to deliver SIGKILL, which requires p_lock.

- Avoid holding p_lock across vnode_to_path: this risks deadlock or
  panic if the file system, such as nfs, tries to check for pending
  signals, which requires p_lock.

PR kern/60568: panic locking against myself (p->p_lock) in NFS from
sysctl_vmproc


To generate a diff of this commit:
cvs rdiff -u -r1.431 -r1.432 src/sys/uvm/uvm_map.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.