| 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-2021-47340: jfs: fix GPF in diFree |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| jfs: fix GPF in diFree |
| |
| Avoid passing inode with |
| JFS_SBI(inode->i_sb)->ipimap == NULL to |
| diFree()[1]. GFP will appear: |
| |
| struct inode *ipimap = JFS_SBI(ip->i_sb)->ipimap; |
| struct inomap *imap = JFS_IP(ipimap)->i_imap; |
| |
| JFS_IP() will return invalid pointer when ipimap == NULL |
| |
| Call Trace: |
| diFree+0x13d/0x2dc0 fs/jfs/jfs_imap.c:853 [1] |
| jfs_evict_inode+0x2c9/0x370 fs/jfs/inode.c:154 |
| evict+0x2ed/0x750 fs/inode.c:578 |
| iput_final fs/inode.c:1654 [inline] |
| iput.part.0+0x3fe/0x820 fs/inode.c:1680 |
| iput+0x58/0x70 fs/inode.c:1670 |
| |
| The Linux kernel CVE team has assigned CVE-2021-47340 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.4.276 with commit 7bde24bde490f3139eee147efc6d60d6040fe975 |
| Fixed in 4.9.276 with commit 745c9a59422c63f661f4374ed5181740db4130a1 |
| Fixed in 4.14.240 with commit 49def1b0644892e3b113673c13d650c3060b43bc |
| Fixed in 4.19.198 with commit aff8d95b69051d0cf4acc3d91f22299fdbb9dfb3 |
| Fixed in 5.4.133 with commit a21e5cb1a64c904f1f0ef7b2d386fc7d2b1d2ce2 |
| Fixed in 5.10.51 with commit 8018936950360f1c503bb385e158cfc5e4945d18 |
| Fixed in 5.12.18 with commit 3bb27e27240289b47d3466f647a55c567adbdc3a |
| Fixed in 5.13.3 with commit 42f102ea1943ecb10a0756bf75424de5d1d5beed |
| Fixed in 5.14 with commit 9d574f985fe33efd6911f4d752de6f485a1ea732 |
| |
| 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-2021-47340 |
| 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/jfs/inode.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/7bde24bde490f3139eee147efc6d60d6040fe975 |
| https://git.kernel.org/stable/c/745c9a59422c63f661f4374ed5181740db4130a1 |
| https://git.kernel.org/stable/c/49def1b0644892e3b113673c13d650c3060b43bc |
| https://git.kernel.org/stable/c/aff8d95b69051d0cf4acc3d91f22299fdbb9dfb3 |
| https://git.kernel.org/stable/c/a21e5cb1a64c904f1f0ef7b2d386fc7d2b1d2ce2 |
| https://git.kernel.org/stable/c/8018936950360f1c503bb385e158cfc5e4945d18 |
| https://git.kernel.org/stable/c/3bb27e27240289b47d3466f647a55c567adbdc3a |
| https://git.kernel.org/stable/c/42f102ea1943ecb10a0756bf75424de5d1d5beed |
| https://git.kernel.org/stable/c/9d574f985fe33efd6911f4d752de6f485a1ea732 |
