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| author | Gustavo A. R. Silva <gustavoars@kernel.org> | 2024-08-21 23:23:51 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@kernel.org> | 2024-09-09 14:09:00 +0200 |
| commit | 498365e52bebcbc36a93279fe7e9d6aec8479cee (patch) | |
| tree | 129132ce5ca5491f447fab6fe08d5d3b63829062 /drivers/net/wireless/marvell | |
| parent | wifi: mac80211: use two-phase skb reclamation in ieee80211_do_stop() (diff) | |
| download | linux-498365e52bebcbc36a93279fe7e9d6aec8479cee.tar.xz linux-498365e52bebcbc36a93279fe7e9d6aec8479cee.zip | |
wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_cmd_802_11_scan_ext()
Replace one-element array with a flexible-array member in
`struct host_cmd_ds_802_11_scan_ext`.
With this, fix the following warning:
elo 16 17:51:58 surfacebook kernel: ------------[ cut here ]------------
elo 16 17:51:58 surfacebook kernel: memcpy: detected field-spanning write (size 243) of single field "ext_scan->tlv_buffer" at drivers/net/wireless/marvell/mwifiex/scan.c:2239 (size 1)
elo 16 17:51:58 surfacebook kernel: WARNING: CPU: 0 PID: 498 at drivers/net/wireless/marvell/mwifiex/scan.c:2239 mwifiex_cmd_802_11_scan_ext+0x83/0x90 [mwifiex]
Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Closes: https://lore.kernel.org/linux-hardening/ZsZNgfnEwOcPdCly@black.fi.intel.com/
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://patch.msgid.link/ZsZa5xRcsLq9D+RX@elsanto
Diffstat (limited to 'drivers/net/wireless/marvell')
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/fw.h | 2 | ||||
| -rw-r--r-- | drivers/net/wireless/marvell/mwifiex/scan.c | 3 |
2 files changed, 2 insertions, 3 deletions
diff --git a/drivers/net/wireless/marvell/mwifiex/fw.h b/drivers/net/wireless/marvell/mwifiex/fw.h index e91def0afa14..d03129d5d24e 100644 --- a/drivers/net/wireless/marvell/mwifiex/fw.h +++ b/drivers/net/wireless/marvell/mwifiex/fw.h @@ -1627,7 +1627,7 @@ struct host_cmd_ds_802_11_scan_rsp { struct host_cmd_ds_802_11_scan_ext { u32 reserved; - u8 tlv_buffer[1]; + u8 tlv_buffer[]; } __packed; struct mwifiex_ie_types_bss_mode { diff --git a/drivers/net/wireless/marvell/mwifiex/scan.c b/drivers/net/wireless/marvell/mwifiex/scan.c index 010e6ff91457..cab889af4c4a 100644 --- a/drivers/net/wireless/marvell/mwifiex/scan.c +++ b/drivers/net/wireless/marvell/mwifiex/scan.c @@ -2534,8 +2534,7 @@ int mwifiex_ret_802_11_scan_ext(struct mwifiex_private *priv, ext_scan_resp = &resp->params.ext_scan; tlv = (void *)ext_scan_resp->tlv_buffer; - buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN - - 1); + buf_left = le16_to_cpu(resp->size) - (sizeof(*ext_scan_resp) + S_DS_GEN); while (buf_left >= sizeof(struct mwifiex_ie_types_header)) { type = le16_to_cpu(tlv->type); |