wifi: brcmfmac: validate msgbuf flowring IDs before use

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Firmware messages carry flow_ring_id values which brcmfmac converts
to an internal flowid by subtracting
BRCMF_H2D_MSGRING_FLOWRING_IDSTART. The resulting value is used as
a bit index in txstatus_done_map and as an array index into
msgbuf->flowrings and the flowring state.

Validate the firmware supplied flow_ring_id before using it. This
prevents flow_ring_id values below BRCMF_H2D_MSGRING_FLOWRING_IDSTART
from underflowing and rejects values outside msgbuf->max_flowrings.

In the tx status path, complete the packet with an error after
removing a valid packet id so the skb is not leaked when the flow
ring id is invalid.

Signed-off-by: Can Peng <pengcan@kylinos.cn>
Acked-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://patch.msgid.link/20260723055618.550834-1-pengcan@kylinos.cn
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

...

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Can Peng 2026-07-23 13:56:17 +08:00 • committed by Johannes Berg

parent 3a006d09a2

commit 32856f39fe

1 changed files with 40 additions and 6 deletions

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drivers/net/wireless/broadcom/brcm80211/brcmfmac/msgbuf.c

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