| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/vmalloc: combine all TLB flush operations of KASAN shadow virtual address into one operation\n\nWhen compiling kernel source 'make -j $(nproc)' with the up-and-running\nKASAN-enabled kernel on a 256-core machine, the following soft lockup is\nshown:\n\nwatchdog: BUG: soft lockup - CPU#28 stuck for 22s! [kworker/28:1:1760]\nCPU: 28 PID: 1760 Comm: kworker/28:1 Kdump: loaded Not tainted 6.10.0-rc5 #95\nWorkqueue: events drain_vmap_area_work\nRIP: 0010:smp_call_function_many_cond+0x1d8/0xbb0\nCode: 38 c8 7c 08 84 c9 0f 85 49 08 00 00 8b 45 08 a8 01 74 2e 48 89 f1 49 89 f7 48 c1 e9 03 41 83 e7 07 4c 01 e9 41 83 c7 03 f3 90 <0f> b6 01 41 38 c7 7c 08 84 c0 0f 85 d4 06 00 00 8b 45 08 a8 01 75\nRSP: 0018:ffffc9000cb3fb60 EFLAGS: 00000202\nRAX: 0000000000000011 RBX: ffff8883bc4469c0 RCX: ffffed10776e9949\nRDX: 0000000000000002 RSI: ffff8883bb74ca48 RDI: ffffffff8434dc50\nRBP: ffff8883bb74ca40 R08: ffff888103585dc0 R09: ffff8884533a1800\nR10: 0000000000000004 R11: ffffffffffffffff R12: ffffed1077888d39\nR13: dffffc0000000000 R14: ffffed1077888d38 R15: 0000000000000003\nFS: 0000000000000000(0000) GS:ffff8883bc400000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00005577b5c8d158 CR3: 0000000004850000 CR4: 0000000000350ef0\nCall Trace:\n <IRQ>\n ? watchdog_timer_fn+0x2cd/0x390\n ? __pfx_watchdog_timer_fn+0x10/0x10\n ? __hrtimer_run_queues+0x300/0x6d0\n ? sched_clock_cpu+0x69/0x4e0\n ? __pfx___hrtimer_run_queues+0x10/0x10\n ? srso_return_thunk+0x5/0x5f\n ? ktime_get_update_offsets_now+0x7f/0x2a0\n ? srso_return_thunk+0x5/0x5f\n ? srso_return_thunk+0x5/0x5f\n ? hrtimer_interrupt+0x2ca/0x760\n ? __sysvec_apic_timer_interrupt+0x8c/0x2b0\n ? sysvec_apic_timer_interrupt+0x6a/0x90\n </IRQ>\n <TASK>\n ? asm_sysvec_apic_timer_interrupt+0x16/0x20\n ? smp_call_function_many_cond+0x1d8/0xbb0\n ? __pfx_do_kernel_range_flush+0x10/0x10\n on_each_cpu_cond_mask+0x20/0x40\n flush_tlb_kernel_range+0x19b/0x250\n ? srso_return_thunk+0x5/0x5f\n ? kasan_release_vmalloc+0xa7/0xc0\n purge_vmap_node+0x357/0x820\n ? __pfx_purge_vmap_node+0x10/0x10\n __purge_vmap_area_lazy+0x5b8/0xa10\n drain_vmap_area_work+0x21/0x30\n process_one_work+0x661/0x10b0\n worker_thread+0x844/0x10e0\n ? srso_return_thunk+0x5/0x5f\n ? __kthread_parkme+0x82/0x140\n ? __pfx_worker_thread+0x10/0x10\n kthread+0x2a5/0x370\n ? __pfx_kthread+0x10/0x10\n ret_from_fork+0x30/0x70\n ? __pfx_kthread+0x10/0x10\n ret_from_fork_asm+0x1a/0x30\n </TASK>\n\nDebugging Analysis:\n\n 1. The following ftrace log shows that the lockup CPU spends too much\n time iterating vmap_nodes and flushing TLB when purging vm_area\n structures. (Some info is trimmed).\n\n kworker: funcgraph_entry: | drain_vmap_area_work() {\n kworker: funcgraph_entry: | mutex_lock() {\n kworker: funcgraph_entry: 1.092 us | __cond_resched();\n kworker: funcgraph_exit: 3.306 us | }\n ... ...\n kworker: funcgraph_entry: | flush_tlb_kernel_range() {\n ... ...\n kworker: funcgraph_exit: # 7533.649 us | }\n ... ...\n kworker: funcgraph_entry: 2.344 us | mutex_unlock();\n kworker: funcgraph_exit: $ 23871554 us | }\n\n The drain_vmap_area_work() spends over 23 seconds.\n\n There are 2805 flush_tlb_kernel_range() calls in the ftrace log.\n * One is called in __purge_vmap_area_lazy().\n * Others are called by purge_vmap_node->kasan_release_vmalloc.\n purge_vmap_node() iteratively releases kasan vmalloc\n allocations and flushes TLB for each vmap_area.\n - [Rough calculation] Each flush_tlb_kernel_range() runs\n about 7.5ms.\n -- 2804 * 7.5ms = 21.03 seconds.\n -- That's why a soft lock is triggered.\n\n 2. Extending the soft lockup time can work around the issue (For example,\n # echo\n---truncated---" |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "include/linux/kasan.h", |
| "mm/kasan/shadow.c", |
| "mm/vmalloc.c" |
| ], |
| "versions": [ |
| { |
| "version": "282631cb2447318e2a55b41a665dbe8571c46d70", |
| "lessThan": "f9a18889aad9b4c19c6c4550c67ad4f9ed2a354f", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "282631cb2447318e2a55b41a665dbe8571c46d70", |
| "lessThan": "9e9e085effe9b7e342138fde3cf8577d22509932", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "affected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "include/linux/kasan.h", |
| "mm/kasan/shadow.c", |
| "mm/vmalloc.c" |
| ], |
| "versions": [ |
| { |
| "version": "6.9", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "6.9", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.4", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13", |
| "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": "6.9", |
| "versionEndExcluding": "6.12.4" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.9", |
| "versionEndExcluding": "6.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/f9a18889aad9b4c19c6c4550c67ad4f9ed2a354f" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/9e9e085effe9b7e342138fde3cf8577d22509932" |
| } |
| ], |
| "title": "mm/vmalloc: combine all TLB flush operations of KASAN shadow virtual address into one operation", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-56559", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
