| 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-2022-49381: jffs2: fix memory leak in jffs2_do_fill_super |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| jffs2: fix memory leak in jffs2_do_fill_super |
| |
| If jffs2_iget() or d_make_root() in jffs2_do_fill_super() returns |
| an error, we can observe the following kmemleak report: |
| |
| -------------------------------------------- |
| unreferenced object 0xffff888105a65340 (size 64): |
| comm "mount", pid 710, jiffies 4302851558 (age 58.239s) |
| hex dump (first 32 bytes): |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ |
| backtrace: |
| [<ffffffff859c45e5>] kmem_cache_alloc_trace+0x475/0x8a0 |
| [<ffffffff86160146>] jffs2_sum_init+0x96/0x1a0 |
| [<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120 |
| [<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810 |
| [<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0 |
| [...] |
| unreferenced object 0xffff8881bd7f0000 (size 65536): |
| comm "mount", pid 710, jiffies 4302851558 (age 58.239s) |
| hex dump (first 32 bytes): |
| bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ |
| bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................ |
| backtrace: |
| [<ffffffff858579ba>] kmalloc_order+0xda/0x110 |
| [<ffffffff85857a11>] kmalloc_order_trace+0x21/0x130 |
| [<ffffffff859c2ed1>] __kmalloc+0x711/0x8a0 |
| [<ffffffff86160189>] jffs2_sum_init+0xd9/0x1a0 |
| [<ffffffff86140e25>] jffs2_do_mount_fs+0x745/0x2120 |
| [<ffffffff86149fec>] jffs2_do_fill_super+0x35c/0x810 |
| [<ffffffff8614aae9>] jffs2_fill_super+0x2b9/0x3b0 |
| [...] |
| -------------------------------------------- |
| |
| This is because the resources allocated in jffs2_sum_init() are not |
| released. Call jffs2_sum_exit() to release these resources to solve |
| the problem. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49381 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 4.9.318 with commit 4ba7bbeab8009faf3a726e565d98816593ddd5b0 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 4.14.283 with commit 4da8763a3d2b684c773b72ed80fad40bc264bc40 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 4.19.247 with commit 28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 5.4.198 with commit d3a4fff1e7e408c32649030daa7c2c42a7e19a95 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 5.10.122 with commit 3252d327f977b14663a10967f3b0930d6c325687 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 5.15.47 with commit ecc53e58596542791e82eff00702f8af7a313f70 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 5.17.15 with commit cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 5.18.4 with commit 69295267c481545f636b69ff341b8db75aa136b9 |
| Issue introduced in 2.6.15 with commit e631ddba588783edd521c5a89f7b2902772fb691 and fixed in 5.19 with commit c14adb1cf70a984ed081c67e9d27bc3caad9537c |
| |
| 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-2022-49381 |
| 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: |
| fs/jffs2/fs.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/4ba7bbeab8009faf3a726e565d98816593ddd5b0 |
| https://git.kernel.org/stable/c/4da8763a3d2b684c773b72ed80fad40bc264bc40 |
| https://git.kernel.org/stable/c/28048a4cf3813b7cf5cc8cce629dfdc7951cb1c2 |
| https://git.kernel.org/stable/c/d3a4fff1e7e408c32649030daa7c2c42a7e19a95 |
| https://git.kernel.org/stable/c/3252d327f977b14663a10967f3b0930d6c325687 |
| https://git.kernel.org/stable/c/ecc53e58596542791e82eff00702f8af7a313f70 |
| https://git.kernel.org/stable/c/cf9db013e167bc8fc2ecd7a13ed97a37df0c9dab |
| https://git.kernel.org/stable/c/69295267c481545f636b69ff341b8db75aa136b9 |
| https://git.kernel.org/stable/c/c14adb1cf70a984ed081c67e9d27bc3caad9537c |
