{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64164", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.038Z", "datePublished": "2026-07-19T15:40:49.894Z", "dateUpdated": "2026-07-19T15:40:49.894Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:40:49.894Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: tracepoints: fix sleep while in atomic context in btrfs_sync_file()\n\nThe trace event btrfs_sync_file() is called in an atomic context (all trace\nevents are) and its call to dput(), which is needed due to the call to\ndget_parent(), can sleep, triggering a kernel splat.\n\nThis can be reproduced by enabling the trace event and running btrfs/056\nfrom fstests for example. The splat shown in dmesg is the following:\n\n [53.919] BUG: sleeping function called from invalid context at fs/dcache.c:970\n [53.947] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 32773, name: xfs_io\n [53.988] preempt_count: 2, expected: 0\n [53.967] RCU nest depth: 0, expected: 0\n [53.943] Preemption disabled at:\n [53.944] [<0000000000000000>] 0x0\n [54.078] CPU: 0 UID: 0 PID: 32773 Comm: xfs_io Tainted: G W 7.1.0-rc1-btrfs-next-232+ #1 PREEMPT(full)\n [54.070] Tainted: [W]=WARN\n [54.071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.2-0-gea1b7a073390-prebuilt.qemu.org 04/01/2014\n [54.072] Call Trace:\n [54.074] \n [54.076] dump_stack_lvl+0x56/0x80\n [54.079] __might_resched.cold+0xd6/0x10f\n [54.072] dput.part.0+0x24/0x110\n [54.078] trace_event_raw_event_btrfs_sync_file+0x75/0x140 [btrfs]\n [54.089] btrfs_sync_file+0x1ed/0x530 [btrfs]\n [54.087] ? __handle_mm_fault+0x8ae/0xed0\n [54.089] btrfs_do_write_iter+0x172/0x210 [btrfs]\n [54.091] vfs_write+0x21f/0x450\n [54.094] __x64_sys_pwrite64+0x8d/0xc0\n [54.096] ? do_user_addr_fault+0x20c/0x670\n [54.099] do_syscall_64+0x60/0xf20\n [54.092] ? clear_bhb_loop+0x60/0xb0\n [54.094] entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nSo stop using dget_parent() and dput() and access the parent dentry\ndirectly as dentry->d_parent. This is also what ext4 is doing in\nits equivalent trace event ext4_sync_file_enter()." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/trace/events/btrfs.h" ], "versions": [ { "version": "4a7bab35fad5251c8cb738161152578cd83b6b9c", "lessThan": "d78b0a80eac36879ef5478707135c446920e134b", "status": "affected", "versionType": "git" }, { "version": "520e8b4bcf872a534a7bf61ccf880047642df296", "lessThan": "4361954f0e158af0530caa1e57f12b531be4658f", "status": "affected", "versionType": "git" }, { "version": "e252db8ca2a01f82d472091f35d549b313278636", "lessThan": "6279992c9ba2774901c9d4dd4a481162e2534714", "status": "affected", "versionType": "git" }, { "version": "c09a7446aab5773f38d6abb25fce99b8e1dfbc97", "lessThan": "26b2290baaf6da6add0f782a100766e686a33f4f", "status": "affected", "versionType": "git" }, { "version": "32372781d664a9b03c40343e96c29d0a6139f97d", "lessThan": "12a0487945c09760a5968d9333383014ea294117", "status": "affected", "versionType": "git" }, { "version": "2e4adfaec97ee053ad1bdfb5036845e66f7e0d8a", "lessThan": "c32a7e0e3c73c1c0768556a56bd78de9f7b83780", "status": "affected", "versionType": "git" }, { "version": "a85b46db143fda5869e7d8df8f258ccef5fa1719", "lessThan": "0a96d9a85cd2240481297156b9bb72e10b7a8036", "status": "affected", "versionType": "git" }, { "version": "a85b46db143fda5869e7d8df8f258ccef5fa1719", "lessThan": "c73370c677646e86fc4b1780fb07027bdf847375", "status": "affected", "versionType": "git" }, { "version": "d110d7cdb045715c0b45b0dfd974525bb38f653d", "status": "affected", "versionType": "git" }, { "version": "6.6.136", "lessThan": "6.6.142", "status": "affected", "versionType": "semver" }, { "version": "6.12.83", "lessThan": "6.12.92", "status": "affected", "versionType": "semver" }, { "version": "6.18.24", "lessThan": "6.18.34", "status": "affected", "versionType": "semver" }, { "version": "6.19.14", "lessThan": "6.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/trace/events/btrfs.h" ], "versions": [ { "version": "7.0", "status": "affected" }, { "version": "0", "lessThan": "7.0", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.136", "versionEndExcluding": "6.6.142" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.83", "versionEndExcluding": "6.12.92" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.24", "versionEndExcluding": "6.18.34" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.0.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0", "versionEndExcluding": "7.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d78b0a80eac36879ef5478707135c446920e134b" }, { "url": "https://git.kernel.org/stable/c/4361954f0e158af0530caa1e57f12b531be4658f" }, { "url": "https://git.kernel.org/stable/c/6279992c9ba2774901c9d4dd4a481162e2534714" }, { "url": "https://git.kernel.org/stable/c/26b2290baaf6da6add0f782a100766e686a33f4f" }, { "url": "https://git.kernel.org/stable/c/12a0487945c09760a5968d9333383014ea294117" }, { "url": "https://git.kernel.org/stable/c/c32a7e0e3c73c1c0768556a56bd78de9f7b83780" }, { "url": "https://git.kernel.org/stable/c/0a96d9a85cd2240481297156b9bb72e10b7a8036" }, { "url": "https://git.kernel.org/stable/c/c73370c677646e86fc4b1780fb07027bdf847375" } ], "title": "btrfs: tracepoints: fix sleep while in atomic context in btrfs_sync_file()", "x_generator": { "engine": "bippy-1.2.0" } } } }