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| author | Masakazu Mokuno <mokuno@sm.sony.co.jp> | 2008-04-14 11:07:21 +0200 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2008-04-15 21:04:36 +0200 |
| commit | b358492cd2a9c67bff352c5a60d86e7fc9627477 (patch) | |
| tree | 680040ef48b8d7d4f07d7b07e2ac205fa6170144 | |
| parent | b43legacy: fix DMA mapping leakage (diff) | |
| download | linux-b358492cd2a9c67bff352c5a60d86e7fc9627477.tar.xz linux-b358492cd2a9c67bff352c5a60d86e7fc9627477.zip | |
PS3: gelic: fix the oops on the broken IE returned from the hypervisor
This fixes the bug that the driver would try to over-scan the memory
if the sum of the length field of every IEs does not match the length
returned from the hypervisor.
Signed-off-by: Masakazu Mokuno <mokuno@sm.sony.co.jp>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
| -rw-r--r-- | drivers/net/ps3_gelic_wireless.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/drivers/net/ps3_gelic_wireless.c b/drivers/net/ps3_gelic_wireless.c index ddbc6e475e28..c16de5129a71 100644 --- a/drivers/net/ps3_gelic_wireless.c +++ b/drivers/net/ps3_gelic_wireless.c @@ -512,13 +512,18 @@ static void gelic_wl_parse_ie(u8 *data, size_t len, data, len); memset(ie_info, 0, sizeof(struct ie_info)); - while (0 < data_left) { + while (2 <= data_left) { item_id = *pos++; item_len = *pos++; + data_left -= 2; + + if (data_left < item_len) + break; switch (item_id) { case MFIE_TYPE_GENERIC: - if (!memcmp(pos, wpa_oui, OUI_LEN) && + if ((OUI_LEN + 1 <= item_len) && + !memcmp(pos, wpa_oui, OUI_LEN) && pos[OUI_LEN] == 0x01) { ie_info->wpa.data = pos - 2; ie_info->wpa.len = item_len + 2; @@ -535,7 +540,7 @@ static void gelic_wl_parse_ie(u8 *data, size_t len, break; } pos += item_len; - data_left -= item_len + 2; + data_left -= item_len; } pr_debug("%s: wpa=%p,%d wpa2=%p,%d\n", __func__, ie_info->wpa.data, ie_info->wpa.len, |