| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/nocb: Fix rcuog wake-up from offline softirq\n\nAfter a CPU has set itself offline and before it eventually calls\nrcutree_report_cpu_dead(), there are still opportunities for callbacks\nto be enqueued, for example from a softirq. When that happens on NOCB,\nthe rcuog wake-up is deferred through an IPI to an online CPU in order\nnot to call into the scheduler and risk arming the RT-bandwidth after\nhrtimers have been migrated out and disabled.\n\nBut performing a synchronized IPI from a softirq is buggy as reported in\nthe following scenario:\n\n WARNING: CPU: 1 PID: 26 at kernel/smp.c:633 smp_call_function_single\n Modules linked in: rcutorture torture\n CPU: 1 UID: 0 PID: 26 Comm: migration/1 Not tainted 6.11.0-rc1-00012-g9139f93209d1 #1\n Stopper: multi_cpu_stop+0x0/0x320 <- __stop_cpus+0xd0/0x120\n RIP: 0010:smp_call_function_single\n <IRQ>\n swake_up_one_online\n __call_rcu_nocb_wake\n __call_rcu_common\n ? rcu_torture_one_read\n call_timer_fn\n __run_timers\n run_timer_softirq\n handle_softirqs\n irq_exit_rcu\n ? tick_handle_periodic\n sysvec_apic_timer_interrupt\n </IRQ>\n\nFix this with forcing deferred rcuog wake up through the NOCB timer when\nthe CPU is offline. The actual wake up will happen from\nrcutree_report_cpu_dead()." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/rcu/tree_nocb.h" |
| ], |
| "versions": [ |
| { |
| "version": "9b52ee18f6d2f0e845b0dd5ba35edc02ba318827", |
| "lessThan": "84a5feebba10354c683983f5f1372a144225e4c2", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "00a611229bfad075660181c53e054ff544d3ac34", |
| "lessThan": "e66b1e01f2eb3209d08122572f41f7838b79540d", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "9139f93209d1ffd7f489ab19dee01b7c3a1a43d2", |
| "lessThan": "f7345ccc62a4b880cf76458db5f320725f28e400", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "ec2777e57f2f548702b147c6e5cc088079bd93ca", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "bbeaae6f79b2923cf8b8f191d039b19f11adf045", |
| "status": "affected", |
| "versionType": "git" |
| } |
| ] |
| }, |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "kernel/rcu/tree_nocb.h" |
| ], |
| "versions": [ |
| { |
| "version": "6.6.54", |
| "lessThan": "6.6.57", |
| "status": "affected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.11.2", |
| "lessThan": "6.11.4", |
| "status": "affected", |
| "versionType": "semver" |
| } |
| ] |
| } |
| ], |
| "cpeApplicability": [ |
| { |
| "nodes": [ |
| { |
| "operator": "OR", |
| "negate": false, |
| "cpeMatch": [ |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.6.54", |
| "versionEndExcluding": "6.6.57" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.11.2", |
| "versionEndExcluding": "6.11.4" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.1.113" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "6.10.13" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/84a5feebba10354c683983f5f1372a144225e4c2" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/e66b1e01f2eb3209d08122572f41f7838b79540d" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/f7345ccc62a4b880cf76458db5f320725f28e400" |
| } |
| ], |
| "title": "rcu/nocb: Fix rcuog wake-up from offline softirq", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2024-50032", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
