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um: vector: Use GFP_ATOMIC under spin lock 

Use GFP_ATOMIC instead of GFP_KERNEL under spin lock to fix possible
sleep-in-atomic-context bugs.

Fixes: 9807019a62 ("um: Loadable BPF "Firmware" for vector drivers")
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Acked-By: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Tiezhu Yang 2020-06-19 13:20:07 +08:00 committed by Richard Weinberger
parent bab991cf40
commit e4e721fe4c
1 changed files with 2 additions and 2 deletions
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4
arch/um/drivers/vector_kern.c
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@ -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(&fw, efl->data, &vdevice->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;