This is a note to let you know that I've just added the patch titled
virt: vbox: Do not use wait_event_interruptible when called from
to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-next branch.
The patch will show up in the next release of the linux-next tree
(usually sometime within the next 24 hours during the week.)
The patch will also be merged in the next major kernel release
during the merge window.
If you have any questions about this process, please let me know.
>From c35901b39ddc20077f4ae7b9f7bf344487f62212 Mon Sep 17 00:00:00 2001
From: Hans de Goede <hdegoede@xxxxxxxxxx>
Date: Thu, 21 Jan 2021 16:07:54 +0100
Subject: virt: vbox: Do not use wait_event_interruptible when called from
kernel context
Do not use wait_event_interruptible when vbg_hgcm_call() gets called from
kernel-context, such as it being called by the vboxsf filesystem code.
This fixes some filesystem related system calls on shared folders
unexpectedly failing with -EINTR.
Fixes: 0532a1b0d045 ("virt: vbox: Implement passing requestor info to the host for VirtualBox 6.0.x")
Reported-by: Ludovic Pouzenc <bugreports@xxxxxxxxxx>
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20210121150754.147598-1-hdegoede@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/virt/vboxguest/vboxguest_utils.c | 18 ++++++++++++------
1 file changed, 12 insertions(+), 6 deletions(-)
diff --git a/drivers/virt/vboxguest/vboxguest_utils.c b/drivers/virt/vboxguest/vboxguest_utils.c
index ea05af41ec69..8d195e3f8301 100644
--- a/drivers/virt/vboxguest/vboxguest_utils.c
+++ b/drivers/virt/vboxguest/vboxguest_utils.c
@@ -468,7 +468,7 @@ static int hgcm_cancel_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call)
* Cancellation fun.
*/
static int vbg_hgcm_do_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call,
- u32 timeout_ms, bool *leak_it)
+ u32 timeout_ms, bool interruptible, bool *leak_it)
{
int rc, cancel_rc, ret;
long timeout;
@@ -495,10 +495,15 @@ static int vbg_hgcm_do_call(struct vbg_dev *gdev, struct vmmdev_hgcm_call *call,
else
timeout = msecs_to_jiffies(timeout_ms);
- timeout = wait_event_interruptible_timeout(
- gdev->hgcm_wq,
- hgcm_req_done(gdev, &call->header),
- timeout);
+ if (interruptible) {
+ timeout = wait_event_interruptible_timeout(gdev->hgcm_wq,
+ hgcm_req_done(gdev, &call->header),
+ timeout);
+ } else {
+ timeout = wait_event_timeout(gdev->hgcm_wq,
+ hgcm_req_done(gdev, &call->header),
+ timeout);
+ }
/* timeout > 0 means hgcm_req_done has returned true, so success */
if (timeout > 0)
@@ -631,7 +636,8 @@ int vbg_hgcm_call(struct vbg_dev *gdev, u32 requestor, u32 client_id,
hgcm_call_init_call(call, client_id, function, parms, parm_count,
bounce_bufs);
- ret = vbg_hgcm_do_call(gdev, call, timeout_ms, &leak_it);
+ ret = vbg_hgcm_do_call(gdev, call, timeout_ms,
+ requestor & VMMDEV_REQUESTOR_USERMODE, &leak_it);
if (ret == 0) {
*vbox_status = call->header.result;
ret = hgcm_call_copy_back_result(call, parms, parm_count,
--
2.30.0
