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| author | kib <kib@FreeBSD.org> | 2009-09-09 10:52:36 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2009-09-09 10:52:36 +0000 |
| commit | 7a991968f269912366e4d3bdc20512ba61249fc8 (patch) | |
| tree | 0a61e8cece6bd50b657d7ea71c6cacf38f1fc243 /sys/kern/kern_exec.c | |
| parent | 3119d26c952b144660c1507510826da62234c628 (diff) | |
| download | FreeBSD-src-7a991968f269912366e4d3bdc20512ba61249fc8.zip FreeBSD-src-7a991968f269912366e4d3bdc20512ba61249fc8.tar.gz | |
Unlock the image vnode around the call of pmc PMC_FN_PROCESS_EXEC hook.
The hook calls vn_fullpath(9), that should not be executed with a vnode
lock held.
Reported by: Bruce Cran <bruce cran org uk>
Tested by: pho
MFC after: 3 days
Diffstat (limited to 'sys/kern/kern_exec.c')
| -rw-r--r-- | sys/kern/kern_exec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c index e770d07..a90968f 100644 --- a/sys/kern/kern_exec.c +++ b/sys/kern/kern_exec.c @@ -786,10 +786,12 @@ interpret: */ if (PMC_SYSTEM_SAMPLING_ACTIVE() || PMC_PROC_IS_USING_PMCS(p)) { PROC_UNLOCK(p); + VOP_UNLOCK(imgp->vp, 0); pe.pm_credentialschanged = credential_changing; pe.pm_entryaddr = imgp->entry_addr; PMC_CALL_HOOK_X(td, PMC_FN_PROCESS_EXEC, (void *) &pe); + vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY); } else PROC_UNLOCK(p); #else /* !HWPMC_HOOKS */ |
