{ "data_version": "4.0", "data_type": "CVE", "data_format": "MITRE", "CVE_data_meta": { "ID": "CVE-2024-56548", "ASSIGNER": "cve@kernel.org", "STATE": "PUBLIC" }, "description": { "description_data": [ { "lang": "eng", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhfsplus: don't query the device logical block size multiple times\n\nDevices block sizes may change. One of these cases is a loop device by\nusing ioctl LOOP_SET_BLOCK_SIZE.\n\nWhile this may cause other issues like IO being rejected, in the case of\nhfsplus, it will allocate a block by using that size and potentially write\nout-of-bounds when hfsplus_read_wrapper calls hfsplus_submit_bio and the\nlatter function reads a different io_size.\n\nUsing a new min_io_size initally set to sb_min_blocksize works for the\npurposes of the original fix, since it will be set to the max between\nHFSPLUS_SECTOR_SIZE and the first seen logical block size. We still use the\nmax between HFSPLUS_SECTOR_SIZE and min_io_size in case the latter is not\ninitialized.\n\nTested by mounting an hfsplus filesystem with loop block sizes 512, 1024\nand 4096.\n\nThe produced KASAN report before the fix looks like this:\n\n[ 419.944641] ==================================================================\n[ 419.945655] BUG: KASAN: slab-use-after-free in hfsplus_read_wrapper+0x659/0xa0a\n[ 419.946703] Read of size 2 at addr ffff88800721fc00 by task repro/10678\n[ 419.947612]\n[ 419.947846] CPU: 0 UID: 0 PID: 10678 Comm: repro Not tainted 6.12.0-rc5-00008-gdf56e0f2f3ca #84\n[ 419.949007] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014\n[ 419.950035] Call Trace:\n[ 419.950384] \n[ 419.950676] dump_stack_lvl+0x57/0x78\n[ 419.951212] ? hfsplus_read_wrapper+0x659/0xa0a\n[ 419.951830] print_report+0x14c/0x49e\n[ 419.952361] ? __virt_addr_valid+0x267/0x278\n[ 419.952979] ? kmem_cache_debug_flags+0xc/0x1d\n[ 419.953561] ? hfsplus_read_wrapper+0x659/0xa0a\n[ 419.954231] kasan_report+0x89/0xb0\n[ 419.954748] ? hfsplus_read_wrapper+0x659/0xa0a\n[ 419.955367] hfsplus_read_wrapper+0x659/0xa0a\n[ 419.955948] ? __pfx_hfsplus_read_wrapper+0x10/0x10\n[ 419.956618] ? do_raw_spin_unlock+0x59/0x1a9\n[ 419.957214] ? _raw_spin_unlock+0x1a/0x2e\n[ 419.957772] hfsplus_fill_super+0x348/0x1590\n[ 419.958355] ? hlock_class+0x4c/0x109\n[ 419.958867] ? __pfx_hfsplus_fill_super+0x10/0x10\n[ 419.959499] ? __pfx_string+0x10/0x10\n[ 419.960006] ? lock_acquire+0x3e2/0x454\n[ 419.960532] ? bdev_name.constprop.0+0xce/0x243\n[ 419.961129] ? __pfx_bdev_name.constprop.0+0x10/0x10\n[ 419.961799] ? pointer+0x3f0/0x62f\n[ 419.962277] ? __pfx_pointer+0x10/0x10\n[ 419.962761] ? vsnprintf+0x6c4/0xfba\n[ 419.963178] ? __pfx_vsnprintf+0x10/0x10\n[ 419.963621] ? setup_bdev_super+0x376/0x3b3\n[ 419.964029] ? snprintf+0x9d/0xd2\n[ 419.964344] ? __pfx_snprintf+0x10/0x10\n[ 419.964675] ? lock_acquired+0x45c/0x5e9\n[ 419.965016] ? set_blocksize+0x139/0x1c1\n[ 419.965381] ? sb_set_blocksize+0x6d/0xae\n[ 419.965742] ? __pfx_hfsplus_fill_super+0x10/0x10\n[ 419.966179] mount_bdev+0x12f/0x1bf\n[ 419.966512] ? __pfx_mount_bdev+0x10/0x10\n[ 419.966886] ? vfs_parse_fs_string+0xce/0x111\n[ 419.967293] ? __pfx_vfs_parse_fs_string+0x10/0x10\n[ 419.967702] ? __pfx_hfsplus_mount+0x10/0x10\n[ 419.968073] legacy_get_tree+0x104/0x178\n[ 419.968414] vfs_get_tree+0x86/0x296\n[ 419.968751] path_mount+0xba3/0xd0b\n[ 419.969157] ? __pfx_path_mount+0x10/0x10\n[ 419.969594] ? kmem_cache_free+0x1e2/0x260\n[ 419.970311] do_mount+0x99/0xe0\n[ 419.970630] ? __pfx_do_mount+0x10/0x10\n[ 419.971008] __do_sys_mount+0x199/0x1c9\n[ 419.971397] do_syscall_64+0xd0/0x135\n[ 419.971761] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[ 419.972233] RIP: 0033:0x7c3cb812972e\n[ 419.972564] Code: 48 8b 0d f5 46 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d c2 46 0d 00 f7 d8 64 89 01 48\n[ 419.974371] RSP: 002b:00007ffe30632548 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5\n[ 419.975048] RAX: ffffffffffffffda RBX: 00007ffe306328d8 RCX: 00007c3cb812972e\n[ 419.975701] RDX: 0000000020000000 RSI: 0000000020000c80 RDI:\n---truncated---" } ] }, "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": "6596528e391ad978a6a120142cba97a1d7324cb6", "version_value": "baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8" }, { "version_value": "not down converted", "x_cve_json_5_version_data": { "versions": [ { "version": "3.1", "status": "affected" }, { "version": "0", "lessThan": "3.1", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.325", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.287", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.231", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.174", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.120", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.64", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.11", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.2", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ], "defaultStatus": "affected" } } ] } } ] } } ] } }, "references": { "reference_data": [ { "url": "https://git.kernel.org/stable/c/baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/baccb5e12577b7a9eff54ffba301fdaa0f3ee5a8" }, { "url": "https://git.kernel.org/stable/c/f57725bcc5816425e25218fdf5fb6923bc578cdf", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/f57725bcc5816425e25218fdf5fb6923bc578cdf" }, { "url": "https://git.kernel.org/stable/c/e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/e8a2b1c1c2ea85e9a5a2d0c5a5a7e7c639feb866" }, { "url": "https://git.kernel.org/stable/c/06cbfbb13ac88f4154c2eb4bc4176f9d10139847", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/06cbfbb13ac88f4154c2eb4bc4176f9d10139847" }, { "url": "https://git.kernel.org/stable/c/3d7bda75e1a6239db053c73acde17ca146317824", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/3d7bda75e1a6239db053c73acde17ca146317824" }, { "url": "https://git.kernel.org/stable/c/21900e8478126ff6afe3b66679f676e74d1f8830", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/21900e8478126ff6afe3b66679f676e74d1f8830" }, { "url": "https://git.kernel.org/stable/c/2667c9b7b76efcbc7adbfea249892f20c313b0da", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/2667c9b7b76efcbc7adbfea249892f20c313b0da" }, { "url": "https://git.kernel.org/stable/c/bfeecda050aa9376f642d5b2a71c4112cc6c8216", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/bfeecda050aa9376f642d5b2a71c4112cc6c8216" }, { "url": "https://git.kernel.org/stable/c/1c82587cb57687de3f18ab4b98a8850c789bedcf", "refsource": "MISC", "name": "https://git.kernel.org/stable/c/1c82587cb57687de3f18ab4b98a8850c789bedcf" } ] }, "generator": { "engine": "bippy-5f407fcff5a0" } }