{"id":"DEBIAN-CVE-2024-35849","details":"In the Linux kernel, the following vulnerability has been resolved:  btrfs: fix information leak in btrfs_ioctl_logical_to_ino()  Syzbot reported the following information leak for in btrfs_ioctl_logical_to_ino():    BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]   BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40    instrument_copy_to_user include/linux/instrumented.h:114 [inline]    _copy_to_user+0xbc/0x110 lib/usercopy.c:40    copy_to_user include/linux/uaccess.h:191 [inline]    btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499    btrfs_ioctl+0x714/0x1260    vfs_ioctl fs/ioctl.c:51 [inline]    __do_sys_ioctl fs/ioctl.c:904 [inline]    __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890    __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890    x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17    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+0x77/0x7f    Uninit was created at:    __kmalloc_large_node+0x231/0x370 mm/slub.c:3921    __do_kmalloc_node mm/slub.c:3954 [inline]    __kmalloc_node+0xb07/0x1060 mm/slub.c:3973    kmalloc_node include/linux/slab.h:648 [inline]    kvmalloc_node+0xc0/0x2d0 mm/util.c:634    kvmalloc include/linux/slab.h:766 [inline]    init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779    btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480    btrfs_ioctl+0x714/0x1260    vfs_ioctl fs/ioctl.c:51 [inline]    __do_sys_ioctl fs/ioctl.c:904 [inline]    __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890    __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890    x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17    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+0x77/0x7f    Bytes 40-65535 of 65536 are uninitialized   Memory access of size 65536 starts at ffff888045a40000  This happens, because we're copying a 'struct btrfs_data_container' back to user-space. This btrfs_data_container is allocated in 'init_data_container()' via kvmalloc(), which does not zero-fill the memory.  Fix this by using kvzalloc() which zeroes out the memory on allocation.","modified":"2026-09-15T09:03:13.971705512Z","published":"2024-05-17T15:15:21.777Z","upstream":["CVE-2024-35849"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-35849"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.90-1"}]}],"versions":["6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-35849.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-35849.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.9-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-35849.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}