CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-43834 – xdp: fix invalid wait context of page_pool_destroy()
https://notcve.org/view.php?id=CVE-2024-43834
In the Linux kernel, the following vulnerability has been resolved: xdp: fix invalid wait context of page_pool_destroy() If the driver uses a page pool, it creates a page pool with page_pool_create(). The reference count of page pool is 1 as default. A page pool will be destroyed only when a reference count reaches 0. page_pool_destroy() is used to destroy page pool, it decreases a reference count. When a page pool is destroyed, ->disconnect() is called, which is mem_allocator_disconnect(). This function internally acquires mutex_lock(). If the driver uses XDP, it registers a memory model with xdp_rxq_info_reg_mem_model(). The xdp_rxq_info_reg_mem_model() internally increases a page pool reference count if a memory model is a page pool. Now the reference count is 2. To destroy a page pool, the driver should call both page_pool_destroy() and xdp_unreg_mem_model(). The xdp_unreg_mem_model() internally calls page_pool_destroy(). Only page_pool_destroy() decreases a reference count. If a driver calls page_pool_destroy() then xdp_unreg_mem_model(), we will face an invalid wait context warning. Because xdp_unreg_mem_model() calls page_pool_destroy() with rcu_read_lock(). The page_pool_destroy() internally acquires mutex_lock(). Splat looks like: ============================= [ BUG: Invalid wait context ] 6.10.0-rc6+ #4 Tainted: G W ----------------------------- ethtool/1806 is trying to lock: ffffffff90387b90 (mem_id_lock){+.+.}-{4:4}, at: mem_allocator_disconnect+0x73/0x150 other info that might help us debug this: context-{5:5} 3 locks held by ethtool/1806: stack backtrace: CPU: 0 PID: 1806 Comm: ethtool Tainted: G W 6.10.0-rc6+ #4 f916f41f172891c800f2fed Hardware name: ASUS System Product Name/PRIME Z690-P D4, BIOS 0603 11/01/2021 Call Trace: <TASK> dump_stack_lvl+0x7e/0xc0 __lock_acquire+0x1681/0x4de0 ? _printk+0x64/0xe0 ? __pfx_mark_lock.part.0+0x10/0x10 ? __pfx___lock_acquire+0x10/0x10 lock_acquire+0x1b3/0x580 ? mem_allocator_disconnect+0x73/0x150 ? • https://git.kernel.org/stable/c/c3f812cea0d7006469d1cf33a4a9f0a12bb4b3a3 https://git.kernel.org/stable/c/bf22306d92ca59c59dc4aa3bab14768948193d56 https://git.kernel.org/stable/c/05f646cb2174d1a4e032b60b99097f5c4b522616 https://git.kernel.org/stable/c/be9d08ff102df3ac4f66e826ea935cf3af63a4bd https://git.kernel.org/stable/c/6c390ef198aa69795427a5cb5fd7cb4bc7e6cd7a https://git.kernel.org/stable/c/3fc1be360b99baeea15cdee3cf94252cd3a72d26 https://git.kernel.org/stable/c/bf0ce5aa5f2525ed1b921ba36de96e458e77f482 https://git.kernel.org/stable/c/12144069209eec7f2090ce9afa15acdcc •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-43831 – media: mediatek: vcodec: Handle invalid decoder vsi
https://notcve.org/view.php?id=CVE-2024-43831
In the Linux kernel, the following vulnerability has been resolved: media: mediatek: vcodec: Handle invalid decoder vsi Handle an invalid decoder vsi in vpu_dec_init to ensure the decoder vsi is valid for future use. • https://git.kernel.org/stable/c/590577a4e5257ac3ed72999a94666ad6ba8f24bc https://git.kernel.org/stable/c/1c109f23b271a02b9bb195c173fab41e3285a8db https://git.kernel.org/stable/c/cdf05ae76198c513836bde4eb55f099c44773280 https://git.kernel.org/stable/c/59d438f8e02ca641c58d77e1feffa000ff809e9f •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-43830 – leds: trigger: Unregister sysfs attributes before calling deactivate()
https://notcve.org/view.php?id=CVE-2024-43830
In the Linux kernel, the following vulnerability has been resolved: leds: trigger: Unregister sysfs attributes before calling deactivate() Triggers which have trigger specific sysfs attributes typically store related data in trigger-data allocated by the activate() callback and freed by the deactivate() callback. Calling device_remove_groups() after calling deactivate() leaves a window where the sysfs attributes show/store functions could be called after deactivation and then operate on the just freed trigger-data. Move the device_remove_groups() call to before deactivate() to close this race window. This also makes the deactivation path properly do things in reverse order of the activation path which calls the activate() callback before calling device_add_groups(). • https://git.kernel.org/stable/c/a7e7a3156300a7e1982b03cc9cb8fb0c86434c49 https://git.kernel.org/stable/c/c3b7a650c8717aa89df318364609c86cbc040156 https://git.kernel.org/stable/c/d1415125b701ef13370e2761f691ec632a5eb93a https://git.kernel.org/stable/c/09c1583f0e10c918855d6e7540a79461a353e5d6 https://git.kernel.org/stable/c/3fb6a9d67cfd812a547ac73ec02e1077c26c640d https://git.kernel.org/stable/c/734ba6437e80dfc780e9ee9d95f912392d12b5ea https://git.kernel.org/stable/c/cb8aa9d2a4c8a15d6a43ccf901ef3d094aa60374 https://git.kernel.org/stable/c/0788a6f3523d3686a9eed5ea1e6fcce68 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-43829 – drm/qxl: Add check for drm_cvt_mode
https://notcve.org/view.php?id=CVE-2024-43829
In the Linux kernel, the following vulnerability has been resolved: drm/qxl: Add check for drm_cvt_mode Add check for the return value of drm_cvt_mode() and return the error if it fails in order to avoid NULL pointer dereference. • https://git.kernel.org/stable/c/1b043677d4be206c96b51811855502e50057f343 https://git.kernel.org/stable/c/62ef8d7816c8e4a6088275553818b9afc0ffaa03 https://git.kernel.org/stable/c/4e87f592a46bb804d8f833da6ce702ae4b55053f https://git.kernel.org/stable/c/3efe34f95b1ac8c138a46b14ce75956db0d6ee7c https://git.kernel.org/stable/c/f28b353c0c6c7831a70ccca881bf2db5e6785cdd https://git.kernel.org/stable/c/4b1f303bdeceac049e56e4b20eb5280bd9e02f4f https://git.kernel.org/stable/c/d4c57354a06cb4a77998ff8aa40af89eee30e07b https://git.kernel.org/stable/c/7bd09a2db0f617377027a2bb0b9179e69 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-43819 – kvm: s390: Reject memory region operations for ucontrol VMs
https://notcve.org/view.php?id=CVE-2024-43819
In the Linux kernel, the following vulnerability has been resolved: kvm: s390: Reject memory region operations for ucontrol VMs This change rejects the KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2 ioctls when called on a ucontrol VM. This is necessary since ucontrol VMs have kvm->arch.gmap set to 0 and would thus result in a null pointer dereference further in. Memory management needs to be performed in userspace and using the ioctls KVM_S390_UCAS_MAP and KVM_S390_UCAS_UNMAP. Also improve s390 specific documentation for KVM_SET_USER_MEMORY_REGION and KVM_SET_USER_MEMORY_REGION2. [frankja@linux.ibm.com: commit message spelling fix, subject prefix fix] • https://git.kernel.org/stable/c/27e0393f15fc8bc855c6a888387ff5ffd2181089 https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6 https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499 •