lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <2024022916-CVE-2021-46959-f517@gregkh> Date: Thu, 29 Feb 2024 23:31:17 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2021-46959: spi: Fix use-after-free with devm_spi_alloc_* Description =========== In the Linux kernel, the following vulnerability has been resolved: spi: Fix use-after-free with devm_spi_alloc_* We can't rely on the contents of the devres list during spi_unregister_controller(), as the list is already torn down at the time we perform devres_find() for devm_spi_release_controller. This causes devices registered with devm_spi_alloc_{master,slave}() to be mistakenly identified as legacy, non-devm managed devices and have their reference counters decremented below 0. ------------[ cut here ]------------ WARNING: CPU: 1 PID: 660 at lib/refcount.c:28 refcount_warn_saturate+0x108/0x174 [<b0396f04>] (refcount_warn_saturate) from [<b03c56a4>] (kobject_put+0x90/0x98) [<b03c5614>] (kobject_put) from [<b0447b4c>] (put_device+0x20/0x24) r4:b6700140 [<b0447b2c>] (put_device) from [<b07515e8>] (devm_spi_release_controller+0x3c/0x40) [<b07515ac>] (devm_spi_release_controller) from [<b045343c>] (release_nodes+0x84/0xc4) r5:b6700180 r4:b6700100 [<b04533b8>] (release_nodes) from [<b0454160>] (devres_release_all+0x5c/0x60) r8:b1638c54 r7:b117ad94 r6:b1638c10 r5:b117ad94 r4:b163dc10 [<b0454104>] (devres_release_all) from [<b044e41c>] (__device_release_driver+0x144/0x1ec) r5:b117ad94 r4:b163dc10 [<b044e2d8>] (__device_release_driver) from [<b044f70c>] (device_driver_detach+0x84/0xa0) r9:00000000 r8:00000000 r7:b117ad94 r6:b163dc54 r5:b1638c10 r4:b163dc10 [<b044f688>] (device_driver_detach) from [<b044d274>] (unbind_store+0xe4/0xf8) Instead, determine the devm allocation state as a flag on the controller which is guaranteed to be stable during cleanup. The Linux kernel CVE team has assigned CVE-2021-46959 to this issue. Affected and fixed versions =========================== Issue introduced in 4.4.248 with commit 0713aa02f20d and fixed in 4.4.271 with commit 62bb2c7f2411 Issue introduced in 4.9.248 with commit 2be1837b1737 and fixed in 4.9.271 with commit 8bf96425c90f Issue introduced in 4.14.212 with commit e620a73d7ca7 and fixed in 4.14.233 with commit 8e029707f50a Issue introduced in 4.19.163 with commit c886774bf583 and fixed in 4.19.191 with commit 28a5529068c5 Issue introduced in 5.4.80 with commit 2737549129ec and fixed in 5.4.119 with commit 001c8e83646a Issue introduced in 5.10 with commit 5e844cc37a5c and fixed in 5.10.37 with commit c7fabe372a90 Issue introduced in 5.10 with commit 5e844cc37a5c and fixed in 5.11.21 with commit cee78aa24578 Issue introduced in 5.10 with commit 5e844cc37a5c and fixed in 5.12.4 with commit 8735248ebb91 Issue introduced in 5.10 with commit 5e844cc37a5c and fixed in 5.13 with commit 794aaf01444d Please see https://www.kernel.org or 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-2021-46959 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/spi/spi.c include/linux/spi/spi.h 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/62bb2c7f2411a0045c24831f11ecacfc35610815 https://git.kernel.org/stable/c/8bf96425c90f5c1dcf3b7b9df568019a1d4b8a0e https://git.kernel.org/stable/c/8e029707f50a82c53172359c686b2536ab54e58c https://git.kernel.org/stable/c/28a5529068c51cdf0295ab1e11a99a3a909a03e4 https://git.kernel.org/stable/c/001c8e83646ad3b847b18f6ac55a54367d917d74 https://git.kernel.org/stable/c/c7fabe372a9031acd00498bc718ce27c253abfd1 https://git.kernel.org/stable/c/cee78aa24578edac8cf00513dca618c0acc17cd7 https://git.kernel.org/stable/c/8735248ebb918d25427965f0db07939ed0473ec6 https://git.kernel.org/stable/c/794aaf01444d4e765e2b067cba01cc69c1c68ed9
Powered by blists - more mailing lists