On 19/06/2020 06:20, Tiezhu Yang wrote:
Use GFP_ATOMIC instead of GFP_KERNEL under spin lock to fix possible
sleep-in-atomic-context bugs.
Fixes: 9807019a62dc ("um: Loadable BPF "Firmware" for vector drivers")
Signed-off-by: Tiezhu Yang
---
arch/um/drivers/vector_kern.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c
index 8735c46..555203e 100644
--- a/arch/um/drivers/vector_kern.c
+++ b/arch/um/drivers/vector_kern.c
@@ -1403,7 +1403,7 @@ static int vector_net_load_bpf_flash(struct net_device
*dev,
kfree(vp->bpf->filter);
vp->bpf->filter = NULL;
} else {
- vp->bpf = kmalloc(sizeof(struct sock_fprog), GFP_KERNEL);
+ vp->bpf = kmalloc(sizeof(struct sock_fprog), GFP_ATOMIC);
if (vp->bpf == NULL) {
netdev_err(dev, "failed to allocate memory for
firmware\n");
goto flash_fail;
@@ -1415,7 +1415,7 @@ static int vector_net_load_bpf_flash(struct net_device
*dev,
if (request_firmware(, efl->data, >pdev.dev))
goto flash_fail;
- vp->bpf->filter = kmemdup(fw->data, fw->size, GFP_KERNEL);
+ vp->bpf->filter = kmemdup(fw->data, fw->size, GFP_ATOMIC);
if (!vp->bpf->filter)
goto free_buffer;
Acked-By: Anton Ivanov
--
Anton R. Ivanov
Cambridgegreys Limited. Registered in England. Company Number 10273661
https://www.cambridgegreys.com/
