1 files changed, 5 insertions, 1 deletions

diff --git a/arch/um/drivers/line.c b/arch/um/drivers/line.c
index 8035145f043b..62087028a9ce 100644
--- a/arch/um/drivers/line.c
+++ b/arch/um/drivers/line.c
@@ -632,6 +632,7 @@ static irqreturn_t winch_interrupt(int irq, void *data)
         int fd = winch->fd;
         int err;
         char c;
+        struct pid *pgrp;
 
         if (fd != -1) {
                 err = generic_read(fd, &c, NULL);
@@ -657,7 +658,10 @@ static irqreturn_t winch_interrupt(int irq, void *data)
                 if (line != NULL) {
                         chan_window_size(line, &tty->winsize.ws_row,
                                          &tty->winsize.ws_col);
-                        kill_pgrp(tty->pgrp, SIGWINCH, 1);
+                        pgrp = tty_get_pgrp(tty);
+                        if (pgrp)
+                                kill_pgrp(pgrp, SIGWINCH, 1);
+                        put_pid(pgrp);
                 }
                 tty_kref_put(tty);
         }