| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2021-47273: usb: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| usb: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled |
| |
| When only PHY1 is used (for example on Odroid-HC4), the regmap init code |
| uses the usb2 ports when doesn't initialize the PHY1 regmap entry. |
| |
| This fixes: |
| Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 |
| ... |
| pc : regmap_update_bits_base+0x40/0xa0 |
| lr : dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8 |
| ... |
| Call trace: |
| regmap_update_bits_base+0x40/0xa0 |
| dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8 |
| dwc3_meson_g12a_usb2_init+0x7c/0xc8 |
| dwc3_meson_g12a_usb_init+0x28/0x48 |
| dwc3_meson_g12a_probe+0x298/0x540 |
| platform_probe+0x70/0xe0 |
| really_probe+0xf0/0x4d8 |
| driver_probe_device+0xfc/0x168 |
| ... |
| |
| The Linux kernel CVE team has assigned CVE-2021-47273 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit 013af227f58a97ffc61b99301f8f4448dc7e7f55 and fixed in 5.10.44 with commit 750a0d75564293be3ed50f13ef7f38ab75106421 |
| Issue introduced in 5.8 with commit 013af227f58a97ffc61b99301f8f4448dc7e7f55 and fixed in 5.12.11 with commit d8dd3754e707104a34f8ec595034d503ea8871a2 |
| Issue introduced in 5.8 with commit 013af227f58a97ffc61b99301f8f4448dc7e7f55 and fixed in 5.13 with commit 4d2aa178d2ad2fb156711113790dde13e9aa2376 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2021-47273 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/usb/dwc3/dwc3-meson-g12a.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/750a0d75564293be3ed50f13ef7f38ab75106421 |
| https://git.kernel.org/stable/c/d8dd3754e707104a34f8ec595034d503ea8871a2 |
| https://git.kernel.org/stable/c/4d2aa178d2ad2fb156711113790dde13e9aa2376 |
