git: 3a12ea648f3b - stable/13 - freevnode(): lock the freeing vnode around destroy_vpollinfo()
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Date: Fri, 19 Nov 2021 04:36:50 UTC
The branch stable/13 has been updated by kib: URL: https://cgit.FreeBSD.org/src/commit/?id=3a12ea648f3b9a7de4fe08a3a9d3ea6d025e8f07 commit 3a12ea648f3b9a7de4fe08a3a9d3ea6d025e8f07 Author: Konstantin Belousov <kib@FreeBSD.org> AuthorDate: 2021-11-02 02:49:13 +0000 Commit: Konstantin Belousov <kib@FreeBSD.org> CommitDate: 2021-11-19 04:25:29 +0000 freevnode(): lock the freeing vnode around destroy_vpollinfo() (cherry picked from commit d1d675cb304c3cca824fbc9f932dc9d655b1ad24) --- sys/kern/vfs_subr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index da2f90a44d86..ce1f4ed6126e 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -1920,7 +1920,9 @@ freevnode(struct vnode *vp) mac_vnode_destroy(vp); #endif if (vp->v_pollinfo != NULL) { + vn_lock(vp, LK_EXCLUSIVE | LK_RETRY); destroy_vpollinfo(vp->v_pollinfo); + VOP_UNLOCK(vp); vp->v_pollinfo = NULL; } vp->v_mountedhere = NULL;