kcmp_pget(): do not accept TIDs

Otherwise pget() might still look up and hold the current process.

Reported and tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	3 days

This commit is contained in:

Konstantin Belousov

2024-04-30 00:04:25 +03:00

parent 1e01650a78

commit 5b3e5c6ce3

1 changed files with 2 additions and 1 deletions

									
										sys/kern/sys_generic.c
									
		+2
		-1
	
												View File
												
				@@ -2098,7 +2098,8 @@ kcmp_pget(struct thread *td, pid_t pid, struct proc **pp)

						*pp = td->td_proc;

						return (0);

					}

					error = pget(pid, PGET_CANDEBUG | PGET_NOTWEXIT | PGET_HOLD, pp);

					error = pget(pid, PGET_NOTID | PGET_CANDEBUG | PGET_NOTWEXIT |

					    PGET_HOLD, pp);

					MPASS(*pp != td->td_proc);

					return (error);

				}