{ "schema_version": "1.6.1", "id": "RPI-CVE-2026-64164", "modified": "2026-10-07T14:35:31Z", "upstream": [ "CVE-2026-64164" ], "published": "2026-07-19T15:41:06Z", "summary": "btrfs: tracepoints: fix sleep while in atomic context in btrfs_sync_file()", "details": "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": [ { "package": { "ecosystem": "Raspberry Pi OS:12", "name": "linux" }, "versions": [ "1:6.12.87-1+rpt1~bookworm" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.12.87+rpt-rpi-2712", "binary_version": "1:6.12.87-1+rpt1~bookworm" }, { "binary_name": "linux-image-6.12.87+rpt-rpi-v6", "binary_version": "1:6.12.87-1+rpt1~bookworm" }, { "binary_name": "linux-image-6.12.87+rpt-rpi-v7", "binary_version": "1:6.12.87-1+rpt1~bookworm" }, { "binary_name": "linux-image-6.12.87+rpt-rpi-v7l", "binary_version": "1:6.12.87-1+rpt1~bookworm" }, { "binary_name": "linux-image-6.12.87+rpt-rpi-v8", "binary_version": "1:6.12.87-1+rpt1~bookworm" }, { "binary_name": "linux-image-6.12.87+rpt-rpi-v8-rt", "binary_version": "1:6.12.87-1+rpt1~bookworm" } ] }, "database_specific": { "per_version": { "1:6.12.87-1+rpt1~bookworm": { "linux_commit": "ae4d75fb36deba0fe1a986d9bfae65755e082dd0", "upstream_version": "6.12.87", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.12.92" } } } }, { "package": { "ecosystem": "Raspberry Pi OS:13", "name": "linux" }, "versions": [ "1:6.18.29-1+rpt1", "1:6.18.33-1+rpt1" ], "ecosystem_specific": { "binaries": [ { "binary_name": "linux-image-6.18.29+rpt-rpi-2712", "binary_version": "1:6.18.29-1+rpt1" }, { "binary_name": "linux-image-6.18.29+rpt-rpi-v6", "binary_version": "1:6.18.29-1+rpt1" }, { "binary_name": "linux-image-6.18.29+rpt-rpi-v7", "binary_version": "1:6.18.29-1+rpt1" }, { "binary_name": "linux-image-6.18.29+rpt-rpi-v8", "binary_version": "1:6.18.29-1+rpt1" }, { "binary_name": "linux-image-6.18.29+rpt-rpi-v8-rt", "binary_version": "1:6.18.29-1+rpt1" }, { "binary_name": "linux-image-6.18.33+rpt-rpi-2712", "binary_version": "1:6.18.33-1+rpt1" }, { "binary_name": "linux-image-6.18.33+rpt-rpi-v6", "binary_version": "1:6.18.33-1+rpt1" }, { "binary_name": "linux-image-6.18.33+rpt-rpi-v7", "binary_version": "1:6.18.33-1+rpt1" }, { "binary_name": "linux-image-6.18.33+rpt-rpi-v8", "binary_version": "1:6.18.33-1+rpt1" }, { "binary_name": "linux-image-6.18.33+rpt-rpi-v8-rt", "binary_version": "1:6.18.33-1+rpt1" } ] }, "database_specific": { "per_version": { "1:6.18.29-1+rpt1": { "linux_commit": "66318c5b5cd8145a662303af12ed39ac07eb27cc", "upstream_version": "6.18.29", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.18.34" }, "1:6.18.33-1+rpt1": { "linux_commit": "95b85bebbedcaedfa7ca79116ed38b7376fba412", "upstream_version": "6.18.33", "assessment": "commit ancestry (strak rule)", "upstream_fixed": "6.18.34" } } } } ], "references": [ { "type": "ADVISORY", "url": "https://www.cve.org/CVERecord?id=CVE-2026-64164" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/d78b0a80eac36879ef5478707135c446920e134b" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/4361954f0e158af0530caa1e57f12b531be4658f" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/6279992c9ba2774901c9d4dd4a481162e2534714" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/26b2290baaf6da6add0f782a100766e686a33f4f" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/12a0487945c09760a5968d9333383014ea294117" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/c32a7e0e3c73c1c0768556a56bd78de9f7b83780" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/0a96d9a85cd2240481297156b9bb72e10b7a8036" }, { "type": "FIX", "url": "https://git.kernel.org/stable/c/c73370c677646e86fc4b1780fb07027bdf847375" } ], "database_specific": { "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git", "upstream_modified": "2026-07-19T15:41:06Z" } }