git: 1e595e959f66 - main - devfs_open: do not access dsw after dev_relthread()

The branch main has been updated by kib:

URL: https://cgit.FreeBSD.org/src/commit/?id=1e595e959f66e11d0490e90270b9fb701cbc6739

commit 1e595e959f66e11d0490e90270b9fb701cbc6739
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2026-10-05 23:35:32 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2026-10-06 00:30:49 +0000

    devfs_open: do not access dsw after dev_relthread()
    
    Noted and reviewed by:  markj
    Fixes:  850d4562928e ("cdevsw: add D_NONPASSABLE flag")
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D60393
---
 sys/fs/devfs/devfs_vnops.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/sys/fs/devfs/devfs_vnops.c b/sys/fs/devfs/devfs_vnops.c
index cd6cd1959d6b..53fb08c6931b 100644
--- a/sys/fs/devfs/devfs_vnops.c
+++ b/sys/fs/devfs/devfs_vnops.c
@@ -1288,6 +1288,7 @@ devfs_open(struct vop_open_args *ap)
 	int error, ref, vlocked;
 	struct cdevsw *dsw;
 	struct file *fpop;
+	bool passable;
 
 	if (vp->v_type == VBLK)
 		return (ENXIO);
@@ -1306,6 +1307,7 @@ devfs_open(struct vop_open_args *ap)
 		dev_relthread(dev, ref);
 		return (ENXIO);
 	}
+	passable = (dsw->d_flags & D_NONPASSABLE) == 0;
 
 	if (vp->v_type == VCHR)
 		devfs_usecount_add(vp);
@@ -1347,8 +1349,7 @@ devfs_open(struct vop_open_args *ap)
 #endif
 	if (fp->f_ops == &badfileops) {
 		finit(fp, fp->f_flag, DTYPE_VNODE, dev,
-		    (dsw->d_flags & D_NONPASSABLE) == 0 ? &devfs_ops_f :
-		    &devfs_ops_nonpassable_f);
+		    passable ? &devfs_ops_f : &devfs_ops_nonpassable_f);
 	}
 	return (error);
 }