CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-43872 – RDMA/hns: Fix soft lockup under heavy CEQE load
https://notcve.org/view.php?id=CVE-2024-43872
In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix soft lockup under heavy CEQE load CEQEs are handled in interrupt handler currently. This may cause the CPU core staying in interrupt context too long and lead to soft lockup under heavy load. Handle CEQEs in BH workqueue and set an upper limit for the number of CEQE handled by a single call of work handler. • https://git.kernel.org/stable/c/a5073d6054f75d7c94b3354206eec4b804d2fbd4 https://git.kernel.org/stable/c/06580b33c183c9f98e2a2ca96a86137179032c08 https://git.kernel.org/stable/c/2fdf34038369c0a27811e7b4680662a14ada1d6b •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2024-43871 – devres: Fix memory leakage caused by driver API devm_free_percpu()
https://notcve.org/view.php?id=CVE-2024-43871
In the Linux kernel, the following vulnerability has been resolved: devres: Fix memory leakage caused by driver API devm_free_percpu() It will cause memory leakage when use driver API devm_free_percpu() to free memory allocated by devm_alloc_percpu(), fixed by using devres_release() instead of devres_destroy() within devm_free_percpu(). • https://git.kernel.org/stable/c/ff86aae3b4112b85d2231c23bccbc49589df1c06 https://git.kernel.org/stable/c/700e8abd65b10792b2f179ce4e858f2ca2880f85 https://git.kernel.org/stable/c/b044588a16a978cd891cb3d665dd7ae06850d5bf https://git.kernel.org/stable/c/ef56dcdca8f2a53abc3a83d388b8336447533d85 https://git.kernel.org/stable/c/3047f99caec240a88ccd06197af2868da1af6a96 https://git.kernel.org/stable/c/3dcd0673e47664bc6c719ad47dadac6d55d5950d https://git.kernel.org/stable/c/b67552d7c61f52f1271031adfa7834545ae99701 https://git.kernel.org/stable/c/95065edb8ebb27771d5f1e898eef6ab43 • CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak') •
CVSS: 5.1EPSS: 0%CPEs: 6EXPL: 0CVE-2024-43870 – perf: Fix event leak upon exit
https://notcve.org/view.php?id=CVE-2024-43870
In the Linux kernel, the following vulnerability has been resolved: perf: Fix event leak upon exit When a task is scheduled out, pending sigtrap deliveries are deferred to the target task upon resume to userspace via task_work. However failures while adding an event's callback to the task_work engine are ignored. And since the last call for events exit happen after task work is eventually closed, there is a small window during which pending sigtrap can be queued though ignored, leaking the event refcount addition such as in the following scenario: TASK A ----- do_exit() exit_task_work(tsk); <IRQ> perf_event_overflow() event->pending_sigtrap = pending_id; irq_work_queue(&event->pending_irq); </IRQ> =========> PREEMPTION: TASK A -> TASK B event_sched_out() event->pending_sigtrap = 0; atomic_long_inc_not_zero(&event->refcount) // FAILS: task work has exited task_work_add(&event->pending_task) [...] <IRQ WORK> perf_pending_irq() // early return: event->oncpu = -1 </IRQ WORK> [...] =========> TASK B -> TASK A perf_event_exit_task(tsk) perf_event_exit_event() free_event() WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1) // leak event due to unexpected refcount == 2 As a result the event is never released while the task exits. Fix this with appropriate task_work_add()'s error handling. A logical flaw exists in the Linux kernel. When a task is scheduled, pending sigtrap deliveries are deferred to the target task upon resuming to userspace via task_work. • https://git.kernel.org/stable/c/8bffa95ac19ff27c8261904f89d36c7fcf215d59 https://git.kernel.org/stable/c/517e6a301f34613bff24a8e35b5455884f2d83d8 https://git.kernel.org/stable/c/78e1317a174edbfd1182599bf76c092a2877672c https://git.kernel.org/stable/c/67fad724f1b568b356c1065d50df46e6b30eb2f7 https://git.kernel.org/stable/c/70882d7fa74f0731492a0d493e8515a4f7131831 https://git.kernel.org/stable/c/05d3fd599594abf79aad4484bccb2b26e1cb0b51 https://git.kernel.org/stable/c/3d7a63352a93bdb8a1cdf29606bf617d3ac1c22a https://git.kernel.org/stable/c/2fd5ad3f310de22836cdacae919dd99d7 • CWE-404: Improper Resource Shutdown or Release •
CVSS: 6.1EPSS: 0%CPEs: 6EXPL: 0CVE-2024-43869 – perf: Fix event leak upon exec and file release
https://notcve.org/view.php?id=CVE-2024-43869
In the Linux kernel, the following vulnerability has been resolved: perf: Fix event leak upon exec and file release The perf pending task work is never waited upon the matching event release. In the case of a child event, released via free_event() directly, this can potentially result in a leaked event, such as in the following scenario that doesn't even require a weak IRQ work implementation to trigger: schedule() prepare_task_switch() =======> <NMI> perf_event_overflow() event->pending_sigtrap = ... irq_work_queue(&event->pending_irq) <======= </NMI> perf_event_task_sched_out() event_sched_out() event->pending_sigtrap = 0; atomic_long_inc_not_zero(&event->refcount) task_work_add(&event->pending_task) finish_lock_switch() =======> <IRQ> perf_pending_irq() //do nothing, rely on pending task work <======= </IRQ> begin_new_exec() perf_event_exit_task() perf_event_exit_event() // If is child event free_event() WARN(atomic_long_cmpxchg(&event->refcount, 1, 0) != 1) // event is leaked Similar scenarios can also happen with perf_event_remove_on_exec() or simply against concurrent perf_event_release(). Fix this with synchonizing against the possibly remaining pending task work while freeing the event, just like is done with remaining pending IRQ work. This means that the pending task callback neither need nor should hold a reference to the event, preventing it from ever beeing freed. • https://git.kernel.org/stable/c/8bffa95ac19ff27c8261904f89d36c7fcf215d59 https://git.kernel.org/stable/c/517e6a301f34613bff24a8e35b5455884f2d83d8 https://git.kernel.org/stable/c/78e1317a174edbfd1182599bf76c092a2877672c https://git.kernel.org/stable/c/9ad46f1fef421d43cdab3a7d1744b2f43b54dae0 https://git.kernel.org/stable/c/ed2c202dac55423a52d7e2290f2888bf08b8ee99 https://git.kernel.org/stable/c/104e258a004037bc7dba9f6085c71dad6af57ad4 https://git.kernel.org/stable/c/f34d8307a73a18de5320fcc6f40403146d061891 https://git.kernel.org/stable/c/3a5465418f5fd970e86a86c7f4075be26 • CWE-402: Transmission of Private Resources into a New Sphere ('Resource Leak') •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-43868 – riscv/purgatory: align riscv_kernel_entry
https://notcve.org/view.php?id=CVE-2024-43868
In the Linux kernel, the following vulnerability has been resolved: riscv/purgatory: align riscv_kernel_entry When alignment handling is delegated to the kernel, everything must be word-aligned in purgatory, since the trap handler is then set to the kexec one. Without the alignment, hitting the exception would ultimately crash. On other occasions, the kernel's handler would take care of exceptions. This has been tested on a JH7110 SoC with oreboot and its SBI delegating unaligned access exceptions and the kernel configured to handle them. • https://git.kernel.org/stable/c/736e30af583fb6e0e2b8211b894ff99dea0f1ee7 https://git.kernel.org/stable/c/10ffafb456f293976c42f700578ef740467cb569 https://git.kernel.org/stable/c/6e62dab357eea12db0fc62dea94c7a892888e6e8 https://git.kernel.org/stable/c/5d4aaf16a8255f7c71790e211724ba029609c5ff https://git.kernel.org/stable/c/fb197c5d2fd24b9af3d4697d0cf778645846d6d5 •