CVE-2022-49702 SUSE CVE security@suse.de SUSE Security Team SUSE CVE-2022-49702 Interim 1 7 2025-08-06T02:09:03Z current 2025-02-27T00:30:20Z 2025-08-06T02:09:03Z cve-database/bin/generate-cvrf-cve.pl 2020-12-27T01:00:00Z CVE-2022-49702 In the Linux kernel, the following vulnerability has been resolved: btrfs: fix hang during unmount when block group reclaim task is running When we start an unmount, at close_ctree(), if we have the reclaim task running and in the middle of a data block group relocation, we can trigger a deadlock when stopping an async reclaim task, producing a trace like the following: [629724.498185] task:kworker/u16:7 state:D stack: 0 pid:681170 ppid: 2 flags:0x00004000 [629724.499760] Workqueue: events_unbound btrfs_async_reclaim_metadata_space [btrfs] [629724.501267] Call Trace: [629724.501759] <TASK> [629724.502174] __schedule+0x3cb/0xed0 [629724.502842] schedule+0x4e/0xb0 [629724.503447] btrfs_wait_on_delayed_iputs+0x7c/0xc0 [btrfs] [629724.504534] ? prepare_to_wait_exclusive+0xc0/0xc0 [629724.505442] flush_space+0x423/0x630 [btrfs] [629724.506296] ? rcu_read_unlock_trace_special+0x20/0x50 [629724.507259] ? lock_release+0x220/0x4a0 [629724.507932] ? btrfs_get_alloc_profile+0xb3/0x290 [btrfs] [629724.508940] ? do_raw_spin_unlock+0x4b/0xa0 [629724.509688] btrfs_async_reclaim_metadata_space+0x139/0x320 [btrfs] [629724.510922] process_one_work+0x252/0x5a0 [629724.511694] ? process_one_work+0x5a0/0x5a0 [629724.512508] worker_thread+0x52/0x3b0 [629724.513220] ? process_one_work+0x5a0/0x5a0 [629724.514021] kthread+0xf2/0x120 [629724.514627] ? kthread_complete_and_exit+0x20/0x20 [629724.515526] ret_from_fork+0x22/0x30 [629724.516236] </TASK> [629724.516694] task:umount state:D stack: 0 pid:719055 ppid:695412 flags:0x00004000 [629724.518269] Call Trace: [629724.518746] <TASK> [629724.519160] __schedule+0x3cb/0xed0 [629724.519835] schedule+0x4e/0xb0 [629724.520467] schedule_timeout+0xed/0x130 [629724.521221] ? lock_release+0x220/0x4a0 [629724.521946] ? lock_acquired+0x19c/0x420 [629724.522662] ? trace_hardirqs_on+0x1b/0xe0 [629724.523411] __wait_for_common+0xaf/0x1f0 [629724.524189] ? usleep_range_state+0xb0/0xb0 [629724.524997] __flush_work+0x26d/0x530 [629724.525698] ? flush_workqueue_prep_pwqs+0x140/0x140 [629724.526580] ? lock_acquire+0x1a0/0x310 [629724.527324] __cancel_work_timer+0x137/0x1c0 [629724.528190] close_ctree+0xfd/0x531 [btrfs] [629724.529000] ? evict_inodes+0x166/0x1c0 [629724.529510] generic_shutdown_super+0x74/0x120 [629724.530103] kill_anon_super+0x14/0x30 [629724.530611] btrfs_kill_super+0x12/0x20 [btrfs] [629724.531246] deactivate_locked_super+0x31/0xa0 [629724.531817] cleanup_mnt+0x147/0x1c0 [629724.532319] task_work_run+0x5c/0xa0 [629724.532984] exit_to_user_mode_prepare+0x1a6/0x1b0 [629724.533598] syscall_exit_to_user_mode+0x16/0x40 [629724.534200] do_syscall_64+0x48/0x90 [629724.534667] entry_SYSCALL_64_after_hwframe+0x44/0xae [629724.535318] RIP: 0033:0x7fa2b90437a7 [629724.535804] RSP: 002b:00007ffe0b7e4458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [629724.536912] RAX: 0000000000000000 RBX: 00007fa2b9182264 RCX: 00007fa2b90437a7 [629724.538156] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000555d6cf20dd0 [629724.539053] RBP: 0000555d6cf20ba0 R08: 0000000000000000 R09: 00007ffe0b7e3200 [629724.539956] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [629724.540883] R13: 0000555d6cf20dd0 R14: 0000555d6cf20cb0 R15: 0000000000000000 [629724.541796] </TASK> This happens because: 1) Before entering close_ctree() we have the async block group reclaim task running and relocating a data block group; 2) There's an async metadata (or data) space reclaim task running; 3) We enter close_ctree() and park the cleaner kthread; 4) The async space reclaim task is at flush_space() and runs all the existing delayed iputs; 5) Before the async space reclaim task calls btrfs_wait_on_delayed_iputs(), the block group reclaim task which is doing the data block group relocation, creates a delayed iput at replace_file_extents() (called when COWing leaves that have file extent items pointing to relocated data exten ---truncated--- The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). https://www.suse.com/support/security/rating/ SUSE Security Ratings SLES-LTSS-TERADATA 15 SP2 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Workstation Extension 15 SP6 SUSE Linux Enterprise High Availability Extension 12 SP5 SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Module for Public Cloud 15 SP6 SUSE Linux Enterprise Live Patching 12 SP5 SUSE Linux Enterprise Live Patching 15 SP3 SUSE Linux Enterprise Live Patching 15 SP4 SUSE Linux Enterprise Live Patching 15 SP5 SUSE Linux Enterprise Live Patching 15 SP6 SUSE Linux Enterprise Micro 5.0 SUSE Linux Enterprise Micro 5.1 SUSE Linux Enterprise Micro 5.2 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Real Time Module 15 SP6 SUSE Linux Enterprise Server 11 SP4 LTSS SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE SUSE Linux Enterprise Server 12 SP2-LTSS SUSE Linux Enterprise Server 12 SP4-LTSS SUSE Linux Enterprise Server 12 SP5-LTSS SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security SUSE Linux Enterprise Server 15 SP1-LTSS SUSE Linux Enterprise Server 15 SP2-LTSS SUSE Linux Enterprise Server 15 SP3-LTSS SUSE Linux Enterprise Server 15 SP4-LTSS SUSE Linux Enterprise Server 15 SP5-LTSS SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Module for Public Cloud 15 SP6 SUSE Linux Enterprise Workstation Extension 15 SP6 SUSE Linux Enterprise Server 15-LTSS SUSE Linux Enterprise Server Teradata 12 SP3 SUSE Linux Enterprise Server Teradata 15 SP4 SUSE Linux Enterprise Server for SAP Applications 12 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP3 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5 SUSE Linux Enterprise Module for Basesystem 15 SP6 SUSE Linux Enterprise Module for Development Tools 15 SP6 SUSE Linux Enterprise Module for Public Cloud 15 SP6 SUSE Linux Enterprise Workstation Extension 15 SP6 SUSE Linux Micro 6.0 SUSE Linux Micro 6.1 SUSE Manager Proxy 4.3 SUSE Manager Retail Branch Server 4.3 SUSE Manager Server 4.3 openSUSE Leap 15.6 cluster-md-kmp-default dlm-kmp-default gfs2-kmp-default kernel-default kernel-default-base kernel-default-devel kernel-default-extra kernel-default-kgraft kernel-default-kgraft-devel kernel-default-livepatch kernel-default-livepatch-devel kernel-default-man kernel-default-optional kernel-default-vdso kernel-devel kernel-devel-azure kernel-devel-rt kernel-macros kernel-rt kernel-source kernel-source-azure kernel-source-rt kernel-source-vanilla kselftests-kmp-default ocfs2-kmp-default reiserfs-kmp-default kernel-default as a component of SLES-LTSS-TERADATA 15 SP2 kernel-source as a component of SLES-LTSS-TERADATA 15 SP2 kernel-default as a component of SUSE Linux Enterprise High Availability Extension 12 SP5 kernel-source as a component of SUSE Linux Enterprise High Availability Extension 12 SP5 kernel-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS kernel-default-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS kernel-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS kernel-macros as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS kernel-source as a component of SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS kernel-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-default-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-macros as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS kernel-source as a component of SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS cluster-md-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS dlm-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS gfs2-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-default-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS ocfs2-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-macros as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS kernel-source as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS cluster-md-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS dlm-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS gfs2-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-default-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS ocfs2-kmp-default as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-devel as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-macros as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-source as a component of SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS kernel-default-kgraft as a component of SUSE Linux Enterprise Live Patching 12 SP5 kernel-default-kgraft-devel as a component of SUSE Linux Enterprise Live Patching 12 SP5 kernel-default as a component of SUSE Linux Enterprise Live Patching 12 SP5 kernel-source as a component of SUSE Linux Enterprise Live Patching 12 SP5 kernel-default-livepatch as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-default-livepatch-devel as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-default as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-source as a component of SUSE Linux Enterprise Live Patching 15 SP3 kernel-default-livepatch as a component of SUSE Linux Enterprise Live Patching 15 SP4 kernel-default-livepatch-devel as a component of SUSE Linux Enterprise Live Patching 15 SP4 kernel-default as a component of SUSE Linux Enterprise Live Patching 15 SP4 kernel-source as a component of SUSE Linux Enterprise Live Patching 15 SP4 kernel-default-livepatch as a component of SUSE Linux Enterprise Live Patching 15 SP5 kernel-default-livepatch-devel as a component of SUSE Linux Enterprise Live Patching 15 SP5 kernel-default as a component of SUSE Linux Enterprise Live Patching 15 SP5 kernel-source as a component of SUSE Linux Enterprise Live Patching 15 SP5 kernel-default-livepatch as a component of SUSE Linux Enterprise Live Patching 15 SP6 kernel-default-livepatch-devel as a component of SUSE Linux Enterprise Live Patching 15 SP6 kernel-default as a component of SUSE Linux Enterprise Live Patching 15 SP6 kernel-source as a component of SUSE Linux Enterprise Live Patching 15 SP6 kernel-default as a component of SUSE Linux Enterprise Micro 5.0 kernel-default as a component of SUSE Linux Enterprise Micro 5.1 kernel-rt as a component of SUSE Linux Enterprise Micro 5.1 kernel-source as a component of SUSE Linux Enterprise Micro 5.1 kernel-source-rt as a component of SUSE Linux Enterprise Micro 5.1 kernel-default as a component of SUSE Linux Enterprise Micro 5.2 kernel-rt as a component of SUSE Linux Enterprise Micro 5.2 kernel-source as a component of SUSE Linux Enterprise Micro 5.2 kernel-source-rt as a component of SUSE Linux Enterprise Micro 5.2 kernel-default as a component of SUSE Linux Enterprise Micro 5.3 kernel-rt as a component of SUSE Linux Enterprise Micro 5.3 kernel-source as a component of SUSE Linux Enterprise Micro 5.3 kernel-source-rt as a component of SUSE Linux Enterprise Micro 5.3 kernel-default as a component of SUSE Linux Enterprise Micro 5.4 kernel-rt as a component of SUSE Linux Enterprise Micro 5.4 kernel-source as a component of SUSE Linux Enterprise Micro 5.4 kernel-source-rt as a component of SUSE Linux Enterprise Micro 5.4 kernel-default as a component of SUSE Linux Enterprise Micro 5.5 kernel-macros as a component of SUSE Linux Enterprise Micro 5.5 kernel-source as a component of SUSE Linux Enterprise Micro 5.5 kernel-devel-rt as a component of SUSE Linux Enterprise Micro 5.5 kernel-source-rt as a component of SUSE Linux Enterprise Micro 5.5 kernel-default as a component of SUSE Linux Enterprise Module for Basesystem 15 SP6 kernel-default-devel as a component of SUSE Linux Enterprise Module for Basesystem 15 SP6 kernel-devel as a component of SUSE Linux Enterprise Module for Basesystem 15 SP6 kernel-macros as a component of SUSE Linux Enterprise Module for Basesystem 15 SP6 kernel-source as a component of SUSE Linux Enterprise Module for Basesystem 15 SP6 kernel-default as a component of SUSE Linux Enterprise Module for Development Tools 15 SP6 kernel-source as a component of SUSE Linux Enterprise Module for Development Tools 15 SP6 kernel-devel-azure as a component of SUSE Linux Enterprise Module for Public Cloud 15 SP6 kernel-source-azure as a component of SUSE Linux Enterprise Module for Public Cloud 15 SP6 kernel-default as a component of SUSE Linux Enterprise Server 11 SP4 LTSS kernel-source as a component of SUSE Linux Enterprise Server 11 SP4 LTSS kernel-default as a component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE kernel-default-base as a component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE kernel-default-devel as a component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE kernel-source as a component of SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE kernel-default as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-default-base as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-default-man as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-source as a component of SUSE Linux Enterprise Server 12 SP2-LTSS kernel-default as a component of SUSE Linux Enterprise Server 12 SP4-LTSS kernel-default-base as a component of SUSE Linux Enterprise Server 12 SP4-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 12 SP4-LTSS kernel-default-man as a component of SUSE Linux Enterprise Server 12 SP4-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 12 SP4-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 12 SP4-LTSS kernel-source as a component of SUSE Linux Enterprise Server 12 SP4-LTSS cluster-md-kmp-default as a component of SUSE Linux Enterprise Server 12 SP5-LTSS dlm-kmp-default as a component of SUSE Linux Enterprise Server 12 SP5-LTSS gfs2-kmp-default as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-default as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-default-base as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-default-man as a component of SUSE Linux Enterprise Server 12 SP5-LTSS ocfs2-kmp-default as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-source as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-devel-azure as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-source-azure as a component of SUSE Linux Enterprise Server 12 SP5-LTSS kernel-default as a component of SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security kernel-source as a component of SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security kernel-default as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-default-base as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-default-man as a component of SUSE Linux Enterprise Server 15 SP1-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-source as a component of SUSE Linux Enterprise Server 15 SP1-LTSS kernel-default as a component of SUSE Linux Enterprise Server 15 SP2-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 15 SP2-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise Server 15 SP2-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 15 SP2-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 15 SP2-LTSS kernel-source as a component of SUSE Linux Enterprise Server 15 SP2-LTSS kernel-default as a component of SUSE Linux Enterprise Server 15 SP3-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 15 SP3-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise Server 15 SP3-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 15 SP3-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 15 SP3-LTSS kernel-source as a component of SUSE Linux Enterprise Server 15 SP3-LTSS kernel-default as a component of SUSE Linux Enterprise Server 15 SP4-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 15 SP4-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise Server 15 SP4-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 15 SP4-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 15 SP4-LTSS kernel-source as a component of SUSE Linux Enterprise Server 15 SP4-LTSS cluster-md-kmp-default as a component of SUSE Linux Enterprise Server 15 SP5-LTSS dlm-kmp-default as a component of SUSE Linux Enterprise Server 15 SP5-LTSS gfs2-kmp-default as a component of SUSE Linux Enterprise Server 15 SP5-LTSS kernel-default as a component of SUSE Linux Enterprise Server 15 SP5-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 15 SP5-LTSS ocfs2-kmp-default as a component of SUSE Linux Enterprise Server 15 SP5-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise Server 15 SP5-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 15 SP5-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 15 SP5-LTSS kernel-source as a component of SUSE Linux Enterprise Server 15 SP5-LTSS kernel-default as a component of SUSE Linux Enterprise Server 15-LTSS kernel-default-base as a component of SUSE Linux Enterprise Server 15-LTSS kernel-default-devel as a component of SUSE Linux Enterprise Server 15-LTSS kernel-default-man as a component of SUSE Linux Enterprise Server 15-LTSS reiserfs-kmp-default as a component of SUSE Linux Enterprise Server 15-LTSS kernel-devel as a component of SUSE Linux Enterprise Server 15-LTSS kernel-macros as a component of SUSE Linux Enterprise Server 15-LTSS kernel-source as a component of SUSE Linux Enterprise Server 15-LTSS kernel-default as a component of SUSE Linux Enterprise Server Teradata 12 SP3 kernel-source as a component of SUSE Linux Enterprise Server Teradata 12 SP3 kernel-default as a component of SUSE Linux Enterprise Server Teradata 15 SP4 kernel-source as a component of SUSE Linux Enterprise Server Teradata 15 SP4 kernel-default as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP5 kernel-source as a component of SUSE Linux Enterprise Server for SAP Applications 12 SP5 kernel-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 kernel-default-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 reiserfs-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 kernel-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 kernel-macros as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 kernel-source as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP3 kernel-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-default-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 reiserfs-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-macros as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 kernel-source as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP4 cluster-md-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 dlm-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 gfs2-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 ocfs2-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 reiserfs-kmp-default as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-devel as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-macros as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-source as a component of SUSE Linux Enterprise Server for SAP Applications 15 SP5 kernel-default-extra as a component of SUSE Linux Enterprise Workstation Extension 15 SP6 kernel-default as a component of SUSE Linux Enterprise Workstation Extension 15 SP6 kernel-source as a component of SUSE Linux Enterprise Workstation Extension 15 SP6 kernel-default as a component of SUSE Linux Micro 6.0 kernel-devel as a component of SUSE Linux Micro 6.0 kernel-macros as a component of SUSE Linux Micro 6.0 kernel-source as a component of SUSE Linux Micro 6.0 kernel-devel-rt as a component of SUSE Linux Micro 6.0 kernel-source-rt as a component of SUSE Linux Micro 6.0 kernel-default as a component of SUSE Linux Micro 6.1 kernel-devel as a component of SUSE Linux Micro 6.1 kernel-macros as a component of SUSE Linux Micro 6.1 kernel-source as a component of SUSE Linux Micro 6.1 kernel-devel-rt as a component of SUSE Linux Micro 6.1 kernel-source-rt as a component of SUSE Linux Micro 6.1 kernel-default as a component of SUSE Manager Proxy 4.3 kernel-default-devel as a component of SUSE Manager Proxy 4.3 kernel-devel as a component of SUSE Manager Proxy 4.3 kernel-macros as a component of SUSE Manager Proxy 4.3 kernel-source as a component of SUSE Manager Proxy 4.3 kernel-default as a component of SUSE Manager Retail Branch Server 4.3 kernel-default-devel as a component of SUSE Manager Retail Branch Server 4.3 kernel-devel as a component of SUSE Manager Retail Branch Server 4.3 kernel-macros as a component of SUSE Manager Retail Branch Server 4.3 kernel-source as a component of SUSE Manager Retail Branch Server 4.3 kernel-default as a component of SUSE Manager Server 4.3 kernel-default-devel as a component of SUSE Manager Server 4.3 kernel-devel as a component of SUSE Manager Server 4.3 kernel-macros as a component of SUSE Manager Server 4.3 kernel-source as a component of SUSE Manager Server 4.3 kernel-devel-rt as a component of SUSE Real Time Module 15 SP6 kernel-source-rt as a component of SUSE Real Time Module 15 SP6 cluster-md-kmp-default as a component of openSUSE Leap 15.6 dlm-kmp-default as a component of openSUSE Leap 15.6 gfs2-kmp-default as a component of openSUSE Leap 15.6 kernel-default as a component of openSUSE Leap 15.6 kernel-default-devel as a component of openSUSE Leap 15.6 kernel-default-extra as a component of openSUSE Leap 15.6 kernel-default-livepatch as a component of openSUSE Leap 15.6 kernel-default-livepatch-devel as a component of openSUSE Leap 15.6 kernel-default-optional as a component of openSUSE Leap 15.6 kernel-default-vdso as a component of openSUSE Leap 15.6 kselftests-kmp-default as a component of openSUSE Leap 15.6 ocfs2-kmp-default as a component of openSUSE Leap 15.6 reiserfs-kmp-default as a component of openSUSE Leap 15.6 kernel-devel as a component of openSUSE Leap 15.6 kernel-macros as a component of openSUSE Leap 15.6 kernel-source as a component of openSUSE Leap 15.6 kernel-source-vanilla as a component of openSUSE Leap 15.6 kernel-devel-azure as a component of openSUSE Leap 15.6 kernel-source-azure as a component of openSUSE Leap 15.6 kernel-devel-rt as a component of openSUSE Leap 15.6 kernel-source-rt as a component of openSUSE Leap 15.6 In the Linux kernel, the following vulnerability has been resolved: btrfs: fix hang during unmount when block group reclaim task is running When we start an unmount, at close_ctree(), if we have the reclaim task running and in the middle of a data block group relocation, we can trigger a deadlock when stopping an async reclaim task, producing a trace like the following: [629724.498185] task:kworker/u16:7 state:D stack: 0 pid:681170 ppid: 2 flags:0x00004000 [629724.499760] Workqueue: events_unbound btrfs_async_reclaim_metadata_space [btrfs] [629724.501267] Call Trace: [629724.501759] <TASK> [629724.502174] __schedule+0x3cb/0xed0 [629724.502842] schedule+0x4e/0xb0 [629724.503447] btrfs_wait_on_delayed_iputs+0x7c/0xc0 [btrfs] [629724.504534] ? prepare_to_wait_exclusive+0xc0/0xc0 [629724.505442] flush_space+0x423/0x630 [btrfs] [629724.506296] ? rcu_read_unlock_trace_special+0x20/0x50 [629724.507259] ? lock_release+0x220/0x4a0 [629724.507932] ? btrfs_get_alloc_profile+0xb3/0x290 [btrfs] [629724.508940] ? do_raw_spin_unlock+0x4b/0xa0 [629724.509688] btrfs_async_reclaim_metadata_space+0x139/0x320 [btrfs] [629724.510922] process_one_work+0x252/0x5a0 [629724.511694] ? process_one_work+0x5a0/0x5a0 [629724.512508] worker_thread+0x52/0x3b0 [629724.513220] ? process_one_work+0x5a0/0x5a0 [629724.514021] kthread+0xf2/0x120 [629724.514627] ? kthread_complete_and_exit+0x20/0x20 [629724.515526] ret_from_fork+0x22/0x30 [629724.516236] </TASK> [629724.516694] task:umount state:D stack: 0 pid:719055 ppid:695412 flags:0x00004000 [629724.518269] Call Trace: [629724.518746] <TASK> [629724.519160] __schedule+0x3cb/0xed0 [629724.519835] schedule+0x4e/0xb0 [629724.520467] schedule_timeout+0xed/0x130 [629724.521221] ? lock_release+0x220/0x4a0 [629724.521946] ? lock_acquired+0x19c/0x420 [629724.522662] ? trace_hardirqs_on+0x1b/0xe0 [629724.523411] __wait_for_common+0xaf/0x1f0 [629724.524189] ? usleep_range_state+0xb0/0xb0 [629724.524997] __flush_work+0x26d/0x530 [629724.525698] ? flush_workqueue_prep_pwqs+0x140/0x140 [629724.526580] ? lock_acquire+0x1a0/0x310 [629724.527324] __cancel_work_timer+0x137/0x1c0 [629724.528190] close_ctree+0xfd/0x531 [btrfs] [629724.529000] ? evict_inodes+0x166/0x1c0 [629724.529510] generic_shutdown_super+0x74/0x120 [629724.530103] kill_anon_super+0x14/0x30 [629724.530611] btrfs_kill_super+0x12/0x20 [btrfs] [629724.531246] deactivate_locked_super+0x31/0xa0 [629724.531817] cleanup_mnt+0x147/0x1c0 [629724.532319] task_work_run+0x5c/0xa0 [629724.532984] exit_to_user_mode_prepare+0x1a6/0x1b0 [629724.533598] syscall_exit_to_user_mode+0x16/0x40 [629724.534200] do_syscall_64+0x48/0x90 [629724.534667] entry_SYSCALL_64_after_hwframe+0x44/0xae [629724.535318] RIP: 0033:0x7fa2b90437a7 [629724.535804] RSP: 002b:00007ffe0b7e4458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [629724.536912] RAX: 0000000000000000 RBX: 00007fa2b9182264 RCX: 00007fa2b90437a7 [629724.538156] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000555d6cf20dd0 [629724.539053] RBP: 0000555d6cf20ba0 R08: 0000000000000000 R09: 00007ffe0b7e3200 [629724.539956] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [629724.540883] R13: 0000555d6cf20dd0 R14: 0000555d6cf20cb0 R15: 0000000000000000 [629724.541796] </TASK> This happens because: 1) Before entering close_ctree() we have the async block group reclaim task running and relocating a data block group; 2) There's an async metadata (or data) space reclaim task running; 3) We enter close_ctree() and park the cleaner kthread; 4) The async space reclaim task is at flush_space() and runs all the existing delayed iputs; 5) Before the async space reclaim task calls btrfs_wait_on_delayed_iputs(), the block group reclaim task which is doing the data block group relocation, creates a delayed iput at replace_file_extents() (called when COWing leaves that have file extent items pointing to relocated data exten ---truncated--- CVE-2022-49702 SLES-LTSS-TERADATA 15 SP2:kernel-default SLES-LTSS-TERADATA 15 SP2:kernel-source SUSE Linux Enterprise High Availability Extension 12 SP5:kernel-default SUSE Linux Enterprise High Availability Extension 12 SP5:kernel-source SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:kernel-default SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:kernel-default-devel SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:kernel-devel SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:kernel-macros SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:kernel-source SUSE Linux Enterprise High Performance Computing 15 SP3-LTSS:reiserfs-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:cluster-md-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:dlm-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:gfs2-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:kernel-default SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:kernel-default-devel SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:kernel-devel SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:kernel-macros SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:kernel-source SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:ocfs2-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:cluster-md-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:dlm-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:gfs2-kmp-default SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:kernel-default SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:kernel-default-devel SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:kernel-devel SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:kernel-macros SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:kernel-source SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:ocfs2-kmp-default SUSE Linux Enterprise Live Patching 12 SP5:kernel-default SUSE Linux Enterprise Live Patching 12 SP5:kernel-default-kgraft SUSE Linux Enterprise Live Patching 12 SP5:kernel-default-kgraft-devel SUSE Linux Enterprise Live Patching 12 SP5:kernel-source SUSE Linux Enterprise Live Patching 15 SP3:kernel-default SUSE Linux Enterprise Live Patching 15 SP3:kernel-default-livepatch SUSE Linux Enterprise Live Patching 15 SP3:kernel-default-livepatch-devel SUSE Linux Enterprise Live Patching 15 SP3:kernel-source SUSE Linux Enterprise Live Patching 15 SP5:kernel-default SUSE Linux Enterprise Live Patching 15 SP5:kernel-default-livepatch SUSE Linux Enterprise Live Patching 15 SP5:kernel-default-livepatch-devel SUSE Linux Enterprise Live Patching 15 SP5:kernel-source SUSE Linux Enterprise Live Patching 15 SP6:kernel-default SUSE Linux Enterprise Live Patching 15 SP6:kernel-default-livepatch SUSE Linux Enterprise Live Patching 15 SP6:kernel-default-livepatch-devel SUSE Linux Enterprise Live Patching 15 SP6:kernel-source SUSE Linux Enterprise Micro 5.0:kernel-default SUSE Linux Enterprise Micro 5.1:kernel-default SUSE Linux Enterprise Micro 5.1:kernel-rt SUSE Linux Enterprise Micro 5.1:kernel-source SUSE Linux Enterprise Micro 5.1:kernel-source-rt SUSE Linux Enterprise Micro 5.2:kernel-default SUSE Linux Enterprise Micro 5.2:kernel-rt SUSE Linux Enterprise Micro 5.2:kernel-source SUSE Linux Enterprise Micro 5.2:kernel-source-rt SUSE Linux Enterprise Micro 5.5:kernel-default SUSE Linux Enterprise Micro 5.5:kernel-devel-rt SUSE Linux Enterprise Micro 5.5:kernel-macros SUSE Linux Enterprise Micro 5.5:kernel-source SUSE Linux Enterprise Micro 5.5:kernel-source-rt SUSE Linux Enterprise Module for Basesystem 15 SP6:kernel-default SUSE Linux Enterprise Module for Basesystem 15 SP6:kernel-default-devel SUSE Linux Enterprise Module for Basesystem 15 SP6:kernel-devel SUSE Linux Enterprise Module for Basesystem 15 SP6:kernel-macros SUSE Linux Enterprise Module for Basesystem 15 SP6:kernel-source SUSE Linux Enterprise Module for Development Tools 15 SP6:kernel-default SUSE Linux Enterprise Module for Development Tools 15 SP6:kernel-source SUSE Linux Enterprise Module for Public Cloud 15 SP6:kernel-devel-azure SUSE Linux Enterprise Module for Public Cloud 15 SP6:kernel-source-azure SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-base SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-devel SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-source SUSE Linux Enterprise Server 11 SP4 LTSS:kernel-default SUSE Linux Enterprise Server 11 SP4 LTSS:kernel-source SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-default SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-default-base SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-default-devel SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-default-man SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-devel SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-macros SUSE Linux Enterprise Server 12 SP2-LTSS:kernel-source SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-default SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-default-base SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-default-devel SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-default-man SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-devel SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-macros SUSE Linux Enterprise Server 12 SP4-LTSS:kernel-source SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security:kernel-default SUSE Linux Enterprise Server 12 SP5-LTSS Extended Security:kernel-source SUSE Linux Enterprise Server 12 SP5-LTSS:cluster-md-kmp-default SUSE Linux Enterprise Server 12 SP5-LTSS:dlm-kmp-default SUSE Linux Enterprise Server 12 SP5-LTSS:gfs2-kmp-default SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-default SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-default-base SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-default-devel SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-default-man SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-devel SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-devel-azure SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-macros SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-source SUSE Linux Enterprise Server 12 SP5-LTSS:kernel-source-azure SUSE Linux Enterprise Server 12 SP5-LTSS:ocfs2-kmp-default SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-default SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-default-base SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-default-devel SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-default-man SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-devel SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-macros SUSE Linux Enterprise Server 15 SP1-LTSS:kernel-source SUSE Linux Enterprise Server 15 SP1-LTSS:reiserfs-kmp-default SUSE Linux Enterprise Server 15 SP2-LTSS:kernel-default SUSE Linux Enterprise Server 15 SP2-LTSS:kernel-default-devel SUSE Linux Enterprise Server 15 SP2-LTSS:kernel-devel SUSE Linux Enterprise Server 15 SP2-LTSS:kernel-macros SUSE Linux Enterprise Server 15 SP2-LTSS:kernel-source SUSE Linux Enterprise Server 15 SP2-LTSS:reiserfs-kmp-default SUSE Linux Enterprise Server 15 SP3-LTSS:kernel-default SUSE Linux Enterprise Server 15 SP3-LTSS:kernel-default-devel SUSE Linux Enterprise Server 15 SP3-LTSS:kernel-devel SUSE Linux Enterprise Server 15 SP3-LTSS:kernel-macros SUSE Linux Enterprise Server 15 SP3-LTSS:kernel-source SUSE Linux Enterprise Server 15 SP3-LTSS:reiserfs-kmp-default SUSE Linux Enterprise Server 15 SP5-LTSS:cluster-md-kmp-default SUSE Linux Enterprise Server 15 SP5-LTSS:dlm-kmp-default SUSE Linux Enterprise Server 15 SP5-LTSS:gfs2-kmp-default SUSE Linux Enterprise Server 15 SP5-LTSS:kernel-default SUSE Linux Enterprise Server 15 SP5-LTSS:kernel-default-devel SUSE Linux Enterprise Server 15 SP5-LTSS:kernel-devel SUSE Linux Enterprise Server 15 SP5-LTSS:kernel-macros SUSE Linux Enterprise Server 15 SP5-LTSS:kernel-source SUSE Linux Enterprise Server 15 SP5-LTSS:ocfs2-kmp-default SUSE Linux Enterprise Server 15 SP5-LTSS:reiserfs-kmp-default SUSE Linux Enterprise Server 15-LTSS:kernel-default SUSE Linux Enterprise Server 15-LTSS:kernel-default-base SUSE Linux Enterprise Server 15-LTSS:kernel-default-devel SUSE Linux Enterprise Server 15-LTSS:kernel-default-man SUSE Linux Enterprise Server 15-LTSS:kernel-devel SUSE Linux Enterprise Server 15-LTSS:kernel-macros SUSE Linux Enterprise Server 15-LTSS:kernel-source SUSE Linux Enterprise Server 15-LTSS:reiserfs-kmp-default SUSE Linux Enterprise Server Teradata 12 SP3:kernel-default SUSE Linux Enterprise Server Teradata 12 SP3:kernel-source SUSE Linux Enterprise Server for SAP Applications 12 SP5:kernel-default SUSE Linux Enterprise Server for SAP Applications 12 SP5:kernel-source SUSE Linux Enterprise Server for SAP Applications 15 SP3:kernel-default SUSE Linux Enterprise Server for SAP Applications 15 SP3:kernel-default-devel SUSE Linux Enterprise Server for SAP Applications 15 SP3:kernel-devel SUSE Linux Enterprise Server for SAP Applications 15 SP3:kernel-macros SUSE Linux Enterprise Server for SAP Applications 15 SP3:kernel-source SUSE Linux Enterprise Server for SAP Applications 15 SP3:reiserfs-kmp-default SUSE Linux Enterprise Server for SAP Applications 15 SP5:cluster-md-kmp-default SUSE Linux Enterprise Server for SAP Applications 15 SP5:dlm-kmp-default SUSE Linux Enterprise Server for SAP Applications 15 SP5:gfs2-kmp-default SUSE Linux Enterprise Server for SAP Applications 15 SP5:kernel-default SUSE Linux Enterprise Server for SAP Applications 15 SP5:kernel-default-devel SUSE Linux Enterprise Server for SAP Applications 15 SP5:kernel-devel SUSE Linux Enterprise Server for SAP 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