Jeongjun Park aha310510@gmail.com wrote:



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Kalle Valo kvalo@kernel.org wrote:

Jeongjun Park aha310510@gmail.com wrote:

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I found the following bug in my fuzzer:

UBSAN: array-index-out-of-bounds in drivers/net/wireless/ath/ath9k/htc_hst.c:26:51 index 255 is out of range for type 'htc_endpoint [22]' CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.11.0-rc6-dirty #14 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Workqueue: events request_firmware_work_func Call Trace:

<TASK> dump_stack_lvl+0x180/0x1b0 __ubsan_handle_out_of_bounds+0xd4/0x130 htc_issue_send.constprop.0+0x20c/0x230 ? _raw_spin_unlock_irqrestore+0x3c/0x70 ath9k_wmi_cmd+0x41d/0x610 ? mark_held_locks+0x9f/0xe0 ...

Since this bug has been confirmed to be caused by insufficient verification of conn_rsp_epid, I think it would be appropriate to add a range check for conn_rsp_epid to htc_connect_service() to prevent the bug from occurring.

Fixes: fb9987d0f748 ("ath9k_htc: Support for AR9271 chipset.") Signed-off-by: Jeongjun Park aha310510@gmail.com Acked-by: Toke Høiland-Jørgensen toke@toke.dk Signed-off-by: Kalle Valo quic_kvalo@quicinc.com

Patch applied to ath-next branch of ath.git, thanks.

Cc: stable@vger.kernel.org

I think this patch should be applied to the next rc version immediately to fix the oob vulnerability as soon as possible, and also to the stable version.

Regards,

Jeongjun Park

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8619593634cb wifi: ath9k: add range check for conn_rsp_epid in htc_connect_service()

-- https://patchwork.kernel.org/project/linux-wireless/patch/20240909103855.680...

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatch... https://docs.kernel.org/process/submitting-patches.html