| 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-2022-49376: scsi: sd: Fix potential NULL pointer dereference |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| scsi: sd: Fix potential NULL pointer dereference |
| |
| If sd_probe() sees an early error before sdkp->device is initialized, |
| sd_zbc_release_disk() is called. This causes a NULL pointer dereference |
| when sd_is_zoned() is called inside that function. Avoid this by removing |
| the call to sd_zbc_release_disk() in sd_probe() error path. |
| |
| This change is safe and does not result in zone information memory leakage |
| because the zone information for a zoned disk is allocated only when |
| sd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set, |
| resulting in sd_disk_release() being called when needed to cleanup a disk |
| zone information using sd_zbc_release_disk(). |
| |
| The Linux kernel CVE team has assigned CVE-2022-49376 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.10 with commit 89d9475610771b5e5fe1879075f0fc9ba6e3755f and fixed in 5.10.122 with commit c1f0187025905e9981000d44a92e159468b561a8 |
| Issue introduced in 4.10 with commit 89d9475610771b5e5fe1879075f0fc9ba6e3755f and fixed in 5.15.47 with commit 0fcb0b131cc90c8f523a293d84c58d0c7273c96f |
| Issue introduced in 4.10 with commit 89d9475610771b5e5fe1879075f0fc9ba6e3755f and fixed in 5.17.15 with commit 78f8e96df06e2d04d82d4071c299b59d28744f47 |
| Issue introduced in 4.10 with commit 89d9475610771b5e5fe1879075f0fc9ba6e3755f and fixed in 5.18.4 with commit 3733439593ad12f7b54ae35c273ea6f15d692de3 |
| Issue introduced in 4.10 with commit 89d9475610771b5e5fe1879075f0fc9ba6e3755f and fixed in 5.19 with commit 05fbde3a77a4f1d62e4c4428f384288c1f1a0be5 |
| |
| 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-2022-49376 |
| 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/scsi/sd.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/c1f0187025905e9981000d44a92e159468b561a8 |
| https://git.kernel.org/stable/c/0fcb0b131cc90c8f523a293d84c58d0c7273c96f |
| https://git.kernel.org/stable/c/78f8e96df06e2d04d82d4071c299b59d28744f47 |
| https://git.kernel.org/stable/c/3733439593ad12f7b54ae35c273ea6f15d692de3 |
| https://git.kernel.org/stable/c/05fbde3a77a4f1d62e4c4428f384288c1f1a0be5 |
