evie/android_kernel_oneplus_msm8998
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brcmfmac: correct handling IF firmware event

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Testing revealed the IF ADD event contains the interface
index of the new interface. This would result in a NULL
pointer access when handling the event.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Arend van Spriel 2012-11-14 18:46:10 -08:00 • committed by John W. Linville
parent bdf5ff516b
commit 607d5c0ef6
1 changed files with 31 additions and 35 deletions
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66
drivers/net/wireless/brcm80211/brcmfmac/fweh.c
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@ -191,42 +191,13 @@ static const char *brcmf_fweh_event_name(enum brcmf_fweh_event_code code)
/**
* brcmf_fweh_queue_event() - create and queue event.
*
* @ifp: firmware interface object.
* @code: event code.
* @pkt: event ether packet.
* @fweh: firmware event handling info.
* @event: event queue entry.
*/
static void brcmf_fweh_queue_event(struct brcmf_if *ifp,
enum brcmf_fweh_event_code code,
struct brcmf_event *pkt)
static void brcmf_fweh_queue_event(struct brcmf_fweh_info *fweh,
struct brcmf_fweh_queue_item *event)
{
struct brcmf_fweh_info *fweh = &ifp->drvr->fweh;
struct brcmf_fweh_queue_item *event;
gfp_t alloc_flag = GFP_KERNEL;
ulong flags;
void *data;
u32 datalen;
/* determine event data */
datalen = get_unaligned_be32(&pkt->msg.datalen);
data = &pkt[1];
if (!ifp->ndev || (code != BRCMF_E_IF && !fweh->evt_handler[code])) {
brcmf_dbg(EVENT, "event ignored: code=%d\n", code);
brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), data, datalen, "event:");
return;
}
if (in_interrupt())
alloc_flag = GFP_ATOMIC;
event = kzalloc(sizeof(*event) + datalen, alloc_flag);
event->code = code;
event->ifidx = ifp->idx;
/* use memcpy to get aligned event message */
memcpy(&event->emsg, &pkt->msg, sizeof(event->emsg));
memcpy(event->data, data, datalen);
memcpy(event->ifaddr, pkt->eth.h_dest, ETH_ALEN);
spin_lock_irqsave(&fweh->evt_q_lock, flags);
list_add_tail(&event->q, &fweh->event_q);
@ -489,10 +460,35 @@ void brcmf_fweh_process_event(struct brcmf_pub *drvr,
struct brcmf_event *event_packet, u8 *ifidx)
{
enum brcmf_fweh_event_code code;
struct brcmf_fweh_info *fweh = &drvr->fweh;
struct brcmf_fweh_queue_item *event;
gfp_t alloc_flag = GFP_KERNEL;
void *data;
u32 datalen;
/* determine event code and interface index */
/* get event info */
code = get_unaligned_be32(&event_packet->msg.event_type);
datalen = get_unaligned_be32(&event_packet->msg.datalen);
*ifidx = event_packet->msg.ifidx;
data = &event_packet[1];
brcmf_fweh_queue_event(drvr->iflist[*ifidx], code, event_packet);
if (code != BRCMF_E_IF && !fweh->evt_handler[code]) {
brcmf_dbg(EVENT, "event ignored: code=%d\n", code);
brcmf_dbg_hex_dump(BRCMF_EVENT_ON(), data, datalen, "event:");
return;
}
if (in_interrupt())
alloc_flag = GFP_ATOMIC;
event = kzalloc(sizeof(*event) + datalen, alloc_flag);
event->code = code;
event->ifidx = *ifidx;
/* use memcpy to get aligned event message */
memcpy(&event->emsg, &event_packet->msg, sizeof(event->emsg));
memcpy(event->data, data, datalen);
memcpy(event->ifaddr, event_packet->eth.h_dest, ETH_ALEN);
brcmf_fweh_queue_event(fweh, event);
}