| 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-2024-42311: hfs: fix to initialize fields of hfs_inode_info after hfs_alloc_inode() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| hfs: fix to initialize fields of hfs_inode_info after hfs_alloc_inode() |
| |
| Syzbot reports uninitialized value access issue as below: |
| |
| loop0: detected capacity change from 0 to 64 |
| ===================================================== |
| BUG: KMSAN: uninit-value in hfs_revalidate_dentry+0x307/0x3f0 fs/hfs/sysdep.c:30 |
| hfs_revalidate_dentry+0x307/0x3f0 fs/hfs/sysdep.c:30 |
| d_revalidate fs/namei.c:862 [inline] |
| lookup_fast+0x89e/0x8e0 fs/namei.c:1649 |
| walk_component fs/namei.c:2001 [inline] |
| link_path_walk+0x817/0x1480 fs/namei.c:2332 |
| path_lookupat+0xd9/0x6f0 fs/namei.c:2485 |
| filename_lookup+0x22e/0x740 fs/namei.c:2515 |
| user_path_at_empty+0x8b/0x390 fs/namei.c:2924 |
| user_path_at include/linux/namei.h:57 [inline] |
| do_mount fs/namespace.c:3689 [inline] |
| __do_sys_mount fs/namespace.c:3898 [inline] |
| __se_sys_mount+0x66b/0x810 fs/namespace.c:3875 |
| __x64_sys_mount+0xe4/0x140 fs/namespace.c:3875 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x63/0x6b |
| |
| BUG: KMSAN: uninit-value in hfs_ext_read_extent fs/hfs/extent.c:196 [inline] |
| BUG: KMSAN: uninit-value in hfs_get_block+0x92d/0x1620 fs/hfs/extent.c:366 |
| hfs_ext_read_extent fs/hfs/extent.c:196 [inline] |
| hfs_get_block+0x92d/0x1620 fs/hfs/extent.c:366 |
| block_read_full_folio+0x4ff/0x11b0 fs/buffer.c:2271 |
| hfs_read_folio+0x55/0x60 fs/hfs/inode.c:39 |
| filemap_read_folio+0x148/0x4f0 mm/filemap.c:2426 |
| do_read_cache_folio+0x7c8/0xd90 mm/filemap.c:3553 |
| do_read_cache_page mm/filemap.c:3595 [inline] |
| read_cache_page+0xfb/0x2f0 mm/filemap.c:3604 |
| read_mapping_page include/linux/pagemap.h:755 [inline] |
| hfs_btree_open+0x928/0x1ae0 fs/hfs/btree.c:78 |
| hfs_mdb_get+0x260c/0x3000 fs/hfs/mdb.c:204 |
| hfs_fill_super+0x1fb1/0x2790 fs/hfs/super.c:406 |
| mount_bdev+0x628/0x920 fs/super.c:1359 |
| hfs_mount+0xcd/0xe0 fs/hfs/super.c:456 |
| legacy_get_tree+0x167/0x2e0 fs/fs_context.c:610 |
| vfs_get_tree+0xdc/0x5d0 fs/super.c:1489 |
| do_new_mount+0x7a9/0x16f0 fs/namespace.c:3145 |
| path_mount+0xf98/0x26a0 fs/namespace.c:3475 |
| do_mount fs/namespace.c:3488 [inline] |
| __do_sys_mount fs/namespace.c:3697 [inline] |
| __se_sys_mount+0x919/0x9e0 fs/namespace.c:3674 |
| __ia32_sys_mount+0x15b/0x1b0 fs/namespace.c:3674 |
| do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline] |
| __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178 |
| do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203 |
| do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246 |
| entry_SYSENTER_compat_after_hwframe+0x70/0x82 |
| |
| Uninit was created at: |
| __alloc_pages+0x9a6/0xe00 mm/page_alloc.c:4590 |
| __alloc_pages_node include/linux/gfp.h:238 [inline] |
| alloc_pages_node include/linux/gfp.h:261 [inline] |
| alloc_slab_page mm/slub.c:2190 [inline] |
| allocate_slab mm/slub.c:2354 [inline] |
| new_slab+0x2d7/0x1400 mm/slub.c:2407 |
| ___slab_alloc+0x16b5/0x3970 mm/slub.c:3540 |
| __slab_alloc mm/slub.c:3625 [inline] |
| __slab_alloc_node mm/slub.c:3678 [inline] |
| slab_alloc_node mm/slub.c:3850 [inline] |
| kmem_cache_alloc_lru+0x64d/0xb30 mm/slub.c:3879 |
| alloc_inode_sb include/linux/fs.h:3018 [inline] |
| hfs_alloc_inode+0x5a/0xc0 fs/hfs/super.c:165 |
| alloc_inode+0x83/0x440 fs/inode.c:260 |
| new_inode_pseudo fs/inode.c:1005 [inline] |
| new_inode+0x38/0x4f0 fs/inode.c:1031 |
| hfs_new_inode+0x61/0x1010 fs/hfs/inode.c:186 |
| hfs_mkdir+0x54/0x250 fs/hfs/dir.c:228 |
| vfs_mkdir+0x49a/0x700 fs/namei.c:4126 |
| do_mkdirat+0x529/0x810 fs/namei.c:4149 |
| __do_sys_mkdirat fs/namei.c:4164 [inline] |
| __se_sys_mkdirat fs/namei.c:4162 [inline] |
| __x64_sys_mkdirat+0xc8/0x120 fs/namei.c:4162 |
| do_syscall_x64 arch/x86/entry/common.c:52 [inline] |
| do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 |
| entry_SYSCALL_64_after_hwframe+0x63/0x6b |
| |
| It missed to initialize .tz_secondswest, .cached_start and .cached_blocks |
| fields in struct hfs_inode_info after hfs_alloc_inode(), fix it. |
| |
| The Linux kernel CVE team has assigned CVE-2024-42311 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.320 with commit f7316b2b2f11cf0c6de917beee8d3de728be24db |
| Fixed in 5.4.282 with commit 4a52861cd76e79f1a593beb23d096523eb9732c2 |
| Fixed in 5.10.224 with commit 10f7163bfb5f8b4e0c9c05a939f20b8540e33c65 |
| Fixed in 5.15.165 with commit d55aae5c1730d6b70d5d8eaff00113cd34772ea3 |
| Fixed in 6.1.103 with commit 58d83fc160505a7009c39dec64effaac5129b971 |
| Fixed in 6.6.44 with commit 9c4e40b9b731220f9464975e49da75496e3865c4 |
| Fixed in 6.10.3 with commit d3493d6f0dfb1ab5225b62faa77732983f2187a1 |
| Fixed in 6.11 with commit 26a2ed107929a855155429b11e1293b83e6b2a8b |
| |
| 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-2024-42311 |
| 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/hfs/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/f7316b2b2f11cf0c6de917beee8d3de728be24db |
| https://git.kernel.org/stable/c/4a52861cd76e79f1a593beb23d096523eb9732c2 |
| https://git.kernel.org/stable/c/10f7163bfb5f8b4e0c9c05a939f20b8540e33c65 |
| https://git.kernel.org/stable/c/d55aae5c1730d6b70d5d8eaff00113cd34772ea3 |
| https://git.kernel.org/stable/c/58d83fc160505a7009c39dec64effaac5129b971 |
| https://git.kernel.org/stable/c/9c4e40b9b731220f9464975e49da75496e3865c4 |
| https://git.kernel.org/stable/c/d3493d6f0dfb1ab5225b62faa77732983f2187a1 |
| https://git.kernel.org/stable/c/26a2ed107929a855155429b11e1293b83e6b2a8b |
