172 lines
11 KiB
JSON
172 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-97549",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-24T16:01:01.154Z",
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"datePublished": "2026-09-25T10:21:42.852Z",
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"dateUpdated": "2026-10-19T09:09:12.382Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:09:12.382Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix under-reservation of blocks when repairing sf directories\n\nWhilst running QA on XFS for-next as of 7.3-rc2 with MKFS_OPTIONS=\"-n\nsize=8192\", I observed the following (trimmed) dmesg splat:\n\n XFS: Assertion failed: args->total >= dp->i_nblocks - nblks, file: fs/xfs/libxfs/xfs_da_btree.c, line: 2387\n WARNING: fs/xfs/xfs_message.c:104 at assfail+0x46/0x4a [xfs], CPU#0: xfs_scrub/1426511\n CPU: 0 UID: 0 PID: 1426511 Comm: xfs_scrub Tainted: G W 7.3.0-rc2-djwx #rc2 PREEMPT(lazy) 6e418570b606a39783b0e7e7b30dc407b965f9e8\n Tainted: [W]=WARN\n RIP: 0010:assfail+0x46/0x4a [xfs]\n RSP: 0018:ffffc900010d7890 EFLAGS: 00010246\n RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00000000ffffffd1\n RDX: 0000000000000000 RSI: 0000000000000021 RDI: ffffffffa059fd38\n RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000\n R10: 000000000000000a R11: 000000007fffffff R12: ffffc900010d7940\n R13: ffff888368d8f980 R14: ffffc900010d7a48 R15: ffffc900010d78d0\n FS: 00007f445c5ce680(0000) GS:ffff8884a97ea000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007f443803b9a8 CR3: 0000000107a4b000 CR4: 00000000003506f0\n Call Trace:\n <TASK>\n xfs_da_grow_inode_int+0x2e0/0x300 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xfs_dir2_grow_inode+0x6e/0x150 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xfs_dir2_sf_to_block+0x149/0x870 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xrep_dir_swap_prep+0xe2/0x110 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xrep_dir_swap+0xfb/0x2f0 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xrep_dir_rebuild_tree+0x99/0x100 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xrep_directory+0x83/0x1c0 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xrep_attempt+0x4f/0x1e0 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xfs_scrub_metadata+0x393/0x5b0 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xfs_ioc_scrubv_metadata+0x306/0x570 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n xfs_file_ioctl+0xa4f/0x1150 [xfs 5de2257e14108c136f11317e6bbb8ac77efd392c]\n __x64_sys_ioctl+0x76/0xc0\n do_syscall_64+0x7a/0x3b0\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n\nThis is a consequence of commit 0fe77e57588b98, which added the\nfollowing assertion to xfs_da_grow_inode_int:\n\n ASSERT(args->total >= dp->i_nblocks - nblks);\n\nTracing this back to xrep_dir_swap_prep, I noticed that the xfs_da_args\nobject that's passed to xfs_dir2_sf_to_block sets args->total to 1.\nThis is incorrect because mkfs set the directory block size to 8k and\nthe filesystem block size to 4k. In other words, args->total should be\n2 here, not 1.\n\nDave Chinner tripped over the same problem with the same branch through\na different channel -- his test setup set the fs block size to 1k, in\nwhich case the directory block size is still set to 4k. Here,\nargs->total should be 4.\n\nChanging the assignment of args->total to sc->mp->m_dir_geo->fsbcount\nmakes the assertion go away, but that isn't a complete fix. In\nxrep_tempexch_estimate, we also incorrectly assume that a shortform\nconversion requires 1 fsblock when it should be m_dir_geo->fsbcount.\nWithout that, we can under-reserve space in the transaction and cause a\nfilesystem shutdown.\n\nNote that the xfs_dabuf_nfsb helper will compute the correct value for\ndirectories and xattr, so we use that instead of open-coding the logic.\nAlso fix xrep_xattr_swap_prep to assign args->total via xfs_dabuf_nfsb\nto avoid one logic bomb if we ever support multi-fsblock attrs.\n\nTripped-by: 0fe77e57588b98 (\"xfs: assert the reservation covers each da fork growth\")"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/xfs/libxfs/xfs_da_btree.c",
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"fs/xfs/libxfs/xfs_da_btree.h",
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"fs/xfs/scrub/attr_repair.c",
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"fs/xfs/scrub/dir_repair.c",
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"fs/xfs/scrub/tempfile.c"
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],
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"versions": [
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{
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"version": "629fdaf5f5b1b7f7107ed4de04e0991a99501ced",
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"lessThan": "996cce0c422b66a0e8b1a99505f896b0669ee5b6",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "629fdaf5f5b1b7f7107ed4de04e0991a99501ced",
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"lessThan": "b8f46ca5cbd629ffb91489ad7f970b3837835b0a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "629fdaf5f5b1b7f7107ed4de04e0991a99501ced",
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"lessThan": "b950e84acd072ac648ace4fea53c0b1212da4b2c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "629fdaf5f5b1b7f7107ed4de04e0991a99501ced",
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"lessThan": "4d3c07591534517c633945c8d8e6526f10e3fabc",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/xfs/libxfs/xfs_da_btree.c",
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"fs/xfs/libxfs/xfs_da_btree.h",
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"fs/xfs/scrub/attr_repair.c",
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"fs/xfs/scrub/dir_repair.c",
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"fs/xfs/scrub/tempfile.c"
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],
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"versions": [
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{
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"version": "6.10",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.10",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.112",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.54",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.7",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.12.112"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "6.18.54"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "7.2.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.10",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/996cce0c422b66a0e8b1a99505f896b0669ee5b6"
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},
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{
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"url": "https://git.kernel.org/stable/c/b8f46ca5cbd629ffb91489ad7f970b3837835b0a"
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},
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{
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"url": "https://git.kernel.org/stable/c/b950e84acd072ac648ace4fea53c0b1212da4b2c"
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},
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{
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"url": "https://git.kernel.org/stable/c/4d3c07591534517c633945c8d8e6526f10e3fabc"
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}
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],
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"title": "xfs: fix under-reservation of blocks when repairing sf directories",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |