{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-35849", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix information leak in btrfs_ioctl_logical_to_ino()\n\nSyzbot reported the following information leak for in\nbtrfs_ioctl_logical_to_ino():\n\n BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40\n instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n _copy_to_user+0xbc/0x110 lib/usercopy.c:40\n copy_to_user include/linux/uaccess.h:191 [inline]\n btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499\n btrfs_ioctl+0x714/0x1260\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:904 [inline]\n __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\n __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\n x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n Uninit was created at:\n __kmalloc_large_node+0x231/0x370 mm/slub.c:3921\n __do_kmalloc_node mm/slub.c:3954 [inline]\n __kmalloc_node+0xb07/0x1060 mm/slub.c:3973\n kmalloc_node include/linux/slab.h:648 [inline]\n kvmalloc_node+0xc0/0x2d0 mm/util.c:634\n kvmalloc include/linux/slab.h:766 [inline]\n init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779\n btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480\n btrfs_ioctl+0x714/0x1260\n vfs_ioctl fs/ioctl.c:51 [inline]\n __do_sys_ioctl fs/ioctl.c:904 [inline]\n __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\n __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\n x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n Bytes 40-65535 of 65536 are uninitialized\n Memory access of size 65536 starts at ffff888045a40000\n\nThis happens, because we're copying a 'struct btrfs_data_container' back\nto user-space. This btrfs_data_container is allocated in\n'init_data_container()' via kvmalloc(), which does not zero-fill the\nmemory.\n\nFix this by using kvzalloc() which zeroes out the memory on allocation." } ] }, "problemtype": { "problemtype_data": [ { "description": [ { "lang": "eng", "value": "n/a" } ] } ] }, "affects": { "vendor": { "vendor_data": [ { "vendor_name": "Linux", "product": { "product_data": [ { "product_name": "Linux", "version": { "version_data": [ { "version_affected": "<", "version_name": "1da177e4c3f4", "version_value": "689efe22e9b5" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "4.19.313", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.4.275", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.10.216", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "custom" }, { "version": "5.15.158", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.1.90", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.6.30", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.8.9", "lessThanOrEqual": "6.8.*", "status": "unaffected", "versionType": "custom" }, { "version": "6.9", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772" }, { "url": "https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86" }, { "url": "https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6" }, { "url": "https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d" }, { "url": "https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6" }, { "url": "https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc" }, { "url": "https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54" }, { "url": "https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html", "refsource": "MISC", "name": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html" } ] }, "generator": { "engine": "bippy-a5840b7849dd" } }