| 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-2021-47564: net: marvell: prestera: fix double free issue on err path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: marvell: prestera: fix double free issue on err path |
| |
| fix error path handling in prestera_bridge_port_join() that |
| cases prestera driver to crash (see below). |
| |
| Trace: |
| Internal error: Oops: 96000044 [#1] SMP |
| Modules linked in: prestera_pci prestera uio_pdrv_genirq |
| CPU: 1 PID: 881 Comm: ip Not tainted 5.15.0 #1 |
| pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) |
| pc : prestera_bridge_destroy+0x2c/0xb0 [prestera] |
| lr : prestera_bridge_port_join+0x2cc/0x350 [prestera] |
| sp : ffff800011a1b0f0 |
| ... |
| x2 : ffff000109ca6c80 x1 : dead000000000100 x0 : dead000000000122 |
| Call trace: |
| prestera_bridge_destroy+0x2c/0xb0 [prestera] |
| prestera_bridge_port_join+0x2cc/0x350 [prestera] |
| prestera_netdev_port_event.constprop.0+0x3c4/0x450 [prestera] |
| prestera_netdev_event_handler+0xf4/0x110 [prestera] |
| raw_notifier_call_chain+0x54/0x80 |
| call_netdevice_notifiers_info+0x54/0xa0 |
| __netdev_upper_dev_link+0x19c/0x380 |
| |
| The Linux kernel CVE team has assigned CVE-2021-47564 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit e1189d9a5fbec8153dbe03f3589bc2baa96694e2 and fixed in 5.10.83 with commit 5dca8eff4627315df98feec09fff9dfe3356325e |
| Issue introduced in 5.10 with commit e1189d9a5fbec8153dbe03f3589bc2baa96694e2 and fixed in 5.15.6 with commit 03e5203d2161a00afe4d97d206d2293e40b2f253 |
| Issue introduced in 5.10 with commit e1189d9a5fbec8153dbe03f3589bc2baa96694e2 and fixed in 5.16 with commit e8d032507cb7912baf1d3e0af54516f823befefd |
| |
| 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-2021-47564 |
| 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/net/ethernet/marvell/prestera/prestera_switchdev.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/5dca8eff4627315df98feec09fff9dfe3356325e |
| https://git.kernel.org/stable/c/03e5203d2161a00afe4d97d206d2293e40b2f253 |
| https://git.kernel.org/stable/c/e8d032507cb7912baf1d3e0af54516f823befefd |
