CVE-2024-47696 (GCVE-0-2024-47696)
Vulnerability from cvelistv5
Published
2024-10-21 11:53
Modified
2026-05-23 15:53
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: RDMA/iwcm: Fix WARNING:at_kernel/workqueue.c:#check_flush_dependency In the commit aee2424246f9 ("RDMA/iwcm: Fix a use-after-free related to destroying CM IDs"), the function flush_workqueue is invoked to flush the work queue iwcm_wq. But at that time, the work queue iwcm_wq was created via the function alloc_ordered_workqueue without the flag WQ_MEM_RECLAIM. Because the current process is trying to flush the whole iwcm_wq, if iwcm_wq doesn't have the flag WQ_MEM_RECLAIM, verify that the current process is not reclaiming memory or running on a workqueue which doesn't have the flag WQ_MEM_RECLAIM as that can break forward-progress guarantee leading to a deadlock. The call trace is as below: [ 125.350876][ T1430] Call Trace: [ 125.356281][ T1430] <TASK> [ 125.361285][ T1430] ? __warn (kernel/panic.c:693) [ 125.367640][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9)) [ 125.375689][ T1430] ? report_bug (lib/bug.c:180 lib/bug.c:219) [ 125.382505][ T1430] ? handle_bug (arch/x86/kernel/traps.c:239) [ 125.388987][ T1430] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1)) [ 125.395831][ T1430] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621) [ 125.403125][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9)) [ 125.410984][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9)) [ 125.418764][ T1430] __flush_workqueue (kernel/workqueue.c:3970) [ 125.426021][ T1430] ? __pfx___might_resched (kernel/sched/core.c:10151) [ 125.433431][ T1430] ? destroy_cm_id (drivers/infiniband/core/iwcm.c:375) iw_cm [ 125.441209][ T1430] ? __pfx___flush_workqueue (kernel/workqueue.c:3910) [ 125.473900][ T1430] ? _raw_spin_lock_irqsave (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:111 kernel/locking/spinlock.c:162) [ 125.473909][ T1430] ? __pfx__raw_spin_lock_irqsave (kernel/locking/spinlock.c:161) [ 125.482537][ T1430] _destroy_id (drivers/infiniband/core/cma.c:2044) rdma_cm [ 125.495072][ T1430] nvme_rdma_free_queue (drivers/nvme/host/rdma.c:656 drivers/nvme/host/rdma.c:650) nvme_rdma [ 125.505827][ T1430] nvme_rdma_reset_ctrl_work (drivers/nvme/host/rdma.c:2180) nvme_rdma [ 125.505831][ T1430] process_one_work (kernel/workqueue.c:3231) [ 125.515122][ T1430] worker_thread (kernel/workqueue.c:3306 kernel/workqueue.c:3393) [ 125.515127][ T1430] ? __pfx_worker_thread (kernel/workqueue.c:3339) [ 125.531837][ T1430] kthread (kernel/kthread.c:389) [ 125.539864][ T1430] ? __pfx_kthread (kernel/kthread.c:342) [ 125.550628][ T1430] ret_from_fork (arch/x86/kernel/process.c:147) [ 125.558840][ T1430] ? __pfx_kthread (kernel/kthread.c:342) [ 125.558844][ T1430] ret_from_fork_asm (arch/x86/entry/entry_64.S:257) [ 125.566487][ T1430] </TASK> [ 125.566488][ T1430] ---[ end trace 0000000000000000 ]---
References
Impacted products
Vendor Product Version
Linux Linux Version: d91d253c87fd1efece521ff2612078a35af673c6
Version: 7f25f296fc9bd0435be14e89bf657cd615a23574
Version: 94ee7ff99b87435ec63211f632918dc7f44dac79
Version: 557d035fe88d78dd51664f4dc0e1896c04c97cf6
Version: dc8074b8901caabb97c2d353abd6b4e7fa5a59a5
Version: ff5bbbdee08287d75d72e65b72a2b76d9637892a
Version: ee39384ee787e86e9db4efb843818ef0ea9cb8ae
Version: aee2424246f9f1dadc33faa78990c1e2eb7826e4
Version: aee2424246f9f1dadc33faa78990c1e2eb7826e4
Version: 4.19.320   ≤
Version: 5.4.282   ≤
Version: 5.10.224   ≤
Version: 5.15.165   ≤
Version: 6.1.103   ≤
Version: 6.6.44   ≤
Version: 6.10.3   ≤
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/iwcm: Fix WARNING:at_kernel/workqueue.c:#check_flush_dependency\n\nIn the commit aee2424246f9 (\"RDMA/iwcm: Fix a use-after-free related to\ndestroying CM IDs\"), the function flush_workqueue is invoked to flush the\nwork queue iwcm_wq.\n\nBut at that time, the work queue iwcm_wq was created via the function\nalloc_ordered_workqueue without the flag WQ_MEM_RECLAIM.\n\nBecause the current process is trying to flush the whole iwcm_wq, if\niwcm_wq doesn\u0027t have the flag WQ_MEM_RECLAIM, verify that the current\nprocess is not reclaiming memory or running on a workqueue which doesn\u0027t\nhave the flag WQ_MEM_RECLAIM as that can break forward-progress guarantee\nleading to a deadlock.\n\nThe call trace is as below:\n\n[  125.350876][ T1430] Call Trace:\n[  125.356281][ T1430]  \u003cTASK\u003e\n[ 125.361285][ T1430] ? __warn (kernel/panic.c:693)\n[ 125.367640][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9))\n[ 125.375689][ T1430] ? report_bug (lib/bug.c:180 lib/bug.c:219)\n[ 125.382505][ T1430] ? handle_bug (arch/x86/kernel/traps.c:239)\n[ 125.388987][ T1430] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))\n[ 125.395831][ T1430] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)\n[ 125.403125][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9))\n[ 125.410984][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9))\n[ 125.418764][ T1430] __flush_workqueue (kernel/workqueue.c:3970)\n[ 125.426021][ T1430] ? __pfx___might_resched (kernel/sched/core.c:10151)\n[ 125.433431][ T1430] ? destroy_cm_id (drivers/infiniband/core/iwcm.c:375) iw_cm\n[ 125.441209][ T1430] ? __pfx___flush_workqueue (kernel/workqueue.c:3910)\n[ 125.473900][ T1430] ? _raw_spin_lock_irqsave (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:111 kernel/locking/spinlock.c:162)\n[ 125.473909][ T1430] ? __pfx__raw_spin_lock_irqsave (kernel/locking/spinlock.c:161)\n[ 125.482537][ T1430] _destroy_id (drivers/infiniband/core/cma.c:2044) rdma_cm\n[ 125.495072][ T1430] nvme_rdma_free_queue (drivers/nvme/host/rdma.c:656 drivers/nvme/host/rdma.c:650) nvme_rdma\n[ 125.505827][ T1430] nvme_rdma_reset_ctrl_work (drivers/nvme/host/rdma.c:2180) nvme_rdma\n[ 125.505831][ T1430] process_one_work (kernel/workqueue.c:3231)\n[ 125.515122][ T1430] worker_thread (kernel/workqueue.c:3306 kernel/workqueue.c:3393)\n[ 125.515127][ T1430] ? __pfx_worker_thread (kernel/workqueue.c:3339)\n[ 125.531837][ T1430] kthread (kernel/kthread.c:389)\n[ 125.539864][ T1430] ? __pfx_kthread (kernel/kthread.c:342)\n[ 125.550628][ T1430] ret_from_fork (arch/x86/kernel/process.c:147)\n[ 125.558840][ T1430] ? __pfx_kthread (kernel/kthread.c:342)\n[ 125.558844][ T1430] ret_from_fork_asm (arch/x86/entry/entry_64.S:257)\n[  125.566487][ T1430]  \u003c/TASK\u003e\n[  125.566488][ T1430] ---[ end trace 0000000000000000 ]---"
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        "dateUpdated": "2026-05-23T15:53:43.422Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "RDMA/iwcm: Fix WARNING:at_kernel/workqueue.c:#check_flush_dependency",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47696",
    "datePublished": "2024-10-21T11:53:33.950Z",
    "dateReserved": "2024-09-30T16:00:12.942Z",
    "dateUpdated": "2026-05-23T15:53:43.422Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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