From: Dexuan Cui <decui@xxxxxxxxxxxxx> Sent: Thursday, May 4, 2023 3:42 PM
>
> Commit 572086325ce9 ("Drivers: hv: vmbus: Cleanup synic memory free path")
> says "Any memory allocations that succeeded will be freed when the caller
> cleans up by calling hv_synic_free()", but if the get_zeroed_page() in
> hv_synic_alloc() fails, currently hv_synic_free() is not really called
> in vmbus_bus_init(), consequently there will be a memory lead, e.g.
s/lead/leak/
> hv_context.hv_numa_map is not freed in the error path. Fix this by
> updating the goto lables.
s/lables/labels/
The statement in commit 572086325ce9 was true at the time of that
commit. But I broke things in commit 4df4cb9e99f8. Should add a
"Fixes:" tag for 4df4cb9e99f8.
>
> Cc: stable@xxxxxxxxxx
> Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> ---
> drivers/hv/vmbus_drv.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c
> index 59eb5fad12e7..c41e6ad0cf64 100644
> --- a/drivers/hv/vmbus_drv.c
> +++ b/drivers/hv/vmbus_drv.c
> @@ -1525,7 +1525,7 @@ static int vmbus_bus_init(void)
> ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "hyperv/vmbus:online",
> hv_synic_init, hv_synic_cleanup);
> if (ret < 0)
> - goto err_cpuhp;
> + goto err_alloc;
> hyperv_cpuhp_online = ret;
>
> ret = vmbus_connect();
> @@ -1577,9 +1577,8 @@ static int vmbus_bus_init(void)
>
> err_connect:
> cpuhp_remove_state(hyperv_cpuhp_online);
> -err_cpuhp:
> - hv_synic_free();
> err_alloc:
> + hv_synic_free();
> if (vmbus_irq == -1) {
> hv_remove_vmbus_handler();
> } else {
> --
> 2.25.1
Nits notwithstanding,
Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
