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| author | jake <jake@FreeBSD.org> | 2000-11-22 07:42:04 +0000 |
|---|---|---|
| committer | jake <jake@FreeBSD.org> | 2000-11-22 07:42:04 +0000 |
| commit | 0c0be4e82677a2d8fb49b7a70676bf359e7360b0 (patch) | |
| tree | a0c32260edfde6d861e66b11172147608684043e /sys/kern/kern_fork.c | |
| parent | 1b544875743d53491a096b0c757bf30ce73bb83b (diff) | |
| download | FreeBSD-src-0c0be4e82677a2d8fb49b7a70676bf359e7360b0.zip FreeBSD-src-0c0be4e82677a2d8fb49b7a70676bf359e7360b0.tar.gz | |
Protect the following with a lockmgr lock:
allproc
zombproc
pidhashtbl
proc.p_list
proc.p_hash
nextpid
Reviewed by: jhb
Obtained from: BSD/OS and netbsd
Diffstat (limited to 'sys/kern/kern_fork.c')
| -rw-r--r-- | sys/kern/kern_fork.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/sys/kern/kern_fork.c b/sys/kern/kern_fork.c index 70d883c..55324c6 100644 --- a/sys/kern/kern_fork.c +++ b/sys/kern/kern_fork.c @@ -287,6 +287,7 @@ fork1(p1, flags, procp) * If RFHIGHPID is set (used during system boot), do not allocate * low-numbered pids. */ + lockmgr(&allproc_lock, LK_EXCLUSIVE, NULL, CURPROC); trypid = nextpid + 1; if (flags & RFHIGHPID) { if (trypid < 10) { @@ -343,12 +344,6 @@ again: } } - p2 = newproc; - p2->p_stat = SIDL; /* protect against others */ - p2->p_pid = trypid; - LIST_INSERT_HEAD(&allproc, p2, p_list); - LIST_INSERT_HEAD(PIDHASH(p2->p_pid), p2, p_hash); - /* * RFHIGHPID does not mess with the nextpid counter during boot. */ @@ -357,6 +352,13 @@ again: else nextpid = trypid; + p2 = newproc; + p2->p_stat = SIDL; /* protect against others */ + p2->p_pid = trypid; + LIST_INSERT_HEAD(&allproc, p2, p_list); + LIST_INSERT_HEAD(PIDHASH(p2->p_pid), p2, p_hash); + lockmgr(&allproc_lock, LK_RELEASE, NULL, CURPROC); + /* * Make a proc table entry for the new process. * Start by zeroing the section of proc that is zero-initialized, |
