| Message ID | 20240909103855.68006-1-aha310510@gmail.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] wifi: ath9k: add range check for conn_rsp_epid in htc_connect_service() | expand |
Jeongjun Park <aha310510@gmail.com> wrote: > 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. 8619593634cb wifi: ath9k: add range check for conn_rsp_epid in htc_connect_service()
Jeongjun Park <aha310510@gmail.com> writes: >> Kalle Valo <kvalo@kernel.org> wrote: >> >> Jeongjun Park <aha310510@gmail.com> wrote: >> >>> 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. >> > > 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. ath-next is fine, the issue has been in ath9k forever so waiting four weeks or so to get to Linus' tree is not making any difference.
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c index eb631fd3336d..b5257b2b4aa5 100644 --- a/drivers/net/wireless/ath/ath9k/htc_hst.c +++ b/drivers/net/wireless/ath/ath9k/htc_hst.c @@ -294,6 +294,9 @@ int htc_connect_service(struct htc_target *target, return -ETIMEDOUT; } + if (target->conn_rsp_epid < 0 || target->conn_rsp_epid >= ENDPOINT_MAX) + return -EINVAL; + *conn_rsp_epid = target->conn_rsp_epid; return 0; err:
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> --- drivers/net/wireless/ath/ath9k/htc_hst.c | 3 +++ 1 file changed, 3 insertions(+) --