CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-27080 – btrfs: fix race when detecting delalloc ranges during fiemap
https://notcve.org/view.php?id=CVE-2024-27080
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix race when detecting delalloc ranges during fiemap For fiemap we recently stopped locking the target extent range for the whole duration of the fiemap call, in order to avoid a deadlock in a scenario where the fiemap buffer happens to be a memory mapped range of the same file. This use case is very unlikely to be useful in practice but it may be triggered by fuzz testing (syzbot, etc). This however introduced a race that makes us miss delalloc ranges for file regions that are currently holes, so the caller of fiemap will not be aware that there's data for some file regions. This can be quite serious for some use cases - for example in coreutils versions before 9.0, the cp program used fiemap to detect holes and data in the source file, copying only regions with data (extents or delalloc) from the source file to the destination file in order to preserve holes (see the documentation for its --sparse command line option). This means that if cp was used with a source file that had delalloc in a hole, the destination file could end up without that data, which is effectively a data loss issue, if it happened to hit the race described below. The race happens like this: 1) Fiemap is called, without the FIEMAP_FLAG_SYNC flag, for a file that has delalloc in the file range [64M, 65M[, which is currently a hole; 2) Fiemap locks the inode in shared mode, then starts iterating the inode's subvolume tree searching for file extent items, without having the whole fiemap target range locked in the inode's io tree - the change introduced recently by commit b0ad381fa769 ("btrfs: fix deadlock with fiemap and extent locking"). It only locks ranges in the io tree when it finds a hole or prealloc extent since that commit; 3) Note that fiemap clones each leaf before using it, and this is to avoid deadlocks when locking a file range in the inode's io tree and the fiemap buffer is memory mapped to some file, because writing to the page with btrfs_page_mkwrite() will wait on any ordered extent for the page's range and the ordered extent needs to lock the range and may need to modify the same leaf, therefore leading to a deadlock on the leaf; 4) While iterating the file extent items in the cloned leaf before finding the hole in the range [64M, 65M[, the delalloc in that range is flushed and its ordered extent completes - meaning the corresponding file extent item is in the inode's subvolume tree, but not present in the cloned leaf that fiemap is iterating over; 5) When fiemap finds the hole in the [64M, 65M[ range by seeing the gap in the cloned leaf (or a file extent item with disk_bytenr == 0 in case the NO_HOLES feature is not enabled), it will lock that file range in the inode's io tree and then search for delalloc by checking for the EXTENT_DELALLOC bit in the io tree for that range and ordered extents (with btrfs_find_delalloc_in_range()). • https://git.kernel.org/stable/c/ded566b4637f1b6b4c9ba74e7d0b8493e93f19cf https://git.kernel.org/stable/c/b0ad381fa7690244802aed119b478b4bdafc31dd https://git.kernel.org/stable/c/89bca7fe6382d61e88c67a0b0e7bce315986fb8b https://git.kernel.org/stable/c/49d640d2946c35a17b051d54171a032dd95b0f50 https://git.kernel.org/stable/c/ced63fffd63072c0ca55d5a451010d71bf08c0b3 https://git.kernel.org/stable/c/978b63f7464abcfd364a6c95f734282c50f3decf •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-27079 – iommu/vt-d: Fix NULL domain on device release
https://notcve.org/view.php?id=CVE-2024-27079
In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix NULL domain on device release In the kdump kernel, the IOMMU operates in deferred_attach mode. In this mode, info->domain may not yet be assigned by the time the release_device function is called. It leads to the following crash in the crash kernel: BUG: kernel NULL pointer dereference, address: 000000000000003c ... RIP: 0010:do_raw_spin_lock+0xa/0xa0 ... _raw_spin_lock_irqsave+0x1b/0x30 intel_iommu_release_device+0x96/0x170 iommu_deinit_device+0x39/0xf0 __iommu_group_remove_device+0xa0/0xd0 iommu_bus_notifier+0x55/0xb0 notifier_call_chain+0x5a/0xd0 blocking_notifier_call_chain+0x41/0x60 bus_notify+0x34/0x50 device_del+0x269/0x3d0 pci_remove_bus_device+0x77/0x100 p2sb_bar+0xae/0x1d0 ... i801_probe+0x423/0x740 Use the release_domain mechanism to fix it. The scalable mode context entry which is not part of release domain should be cleared in release_device(). En el kernel de Linux, se resolvió la siguiente vulnerabilidad: iommu/vt-d: corrige el dominio NULL al lanzar el dispositivo. • https://git.kernel.org/stable/c/586081d3f6b13ec9dfdfdf3d7842a688b376fa5e https://git.kernel.org/stable/c/333fe86968482ca701c609af590003bcea450e8f https://git.kernel.org/stable/c/81e921fd321614c2ad8ac333b041aae1da7a1c6d •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-27078 – media: v4l2-tpg: fix some memleaks in tpg_alloc
https://notcve.org/view.php?id=CVE-2024-27078
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-tpg: fix some memleaks in tpg_alloc In tpg_alloc, resources should be deallocated in each and every error-handling paths, since they are allocated in for statements. Otherwise there would be memleaks because tpg_free is called only when tpg_alloc return 0. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: medio: v4l2-tpg: corrige algunas fugas de memoria en tpg_alloc En tpg_alloc, los recursos deben desasignarse en todas y cada una de las rutas de manejo de errores, ya que se asignan en declaraciones for. De lo contrario, habría memleaks porque se llama a tpg_free solo cuando tpg_alloc devuelve 0. • https://git.kernel.org/stable/c/63881df94d3ecbb0deafa0b77da62ff2f32961c4 https://git.kernel.org/stable/c/0de691ff547d86dd54c24b40a81f9c925df8dd77 https://git.kernel.org/stable/c/8269ab16415f2065cd792c49b0475543936cbd79 https://git.kernel.org/stable/c/94303a06e1852a366e9671fff46d19459f88cb28 https://git.kernel.org/stable/c/770a57922ce36a8476c43f7400b6501c554ea511 https://git.kernel.org/stable/c/6bf5c2fade8ed53b2d26fa9875e5b04f36c7145d https://git.kernel.org/stable/c/4c86c772fef06f5d7a66151bac42366825db0941 https://git.kernel.org/stable/c/31096da07933598da8522c54bd007376f •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-27077 – media: v4l2-mem2mem: fix a memleak in v4l2_m2m_register_entity
https://notcve.org/view.php?id=CVE-2024-27077
In the Linux kernel, the following vulnerability has been resolved: media: v4l2-mem2mem: fix a memleak in v4l2_m2m_register_entity The entity->name (i.e. name) is allocated in v4l2_m2m_register_entity but isn't freed in its following error-handling paths. This patch adds such deallocation to prevent memleak of entity->name. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: medio: v4l2-mem2mem: corrige una fuga de mem en v4l2_m2m_register_entity La entidad->nombre (es decir, nombre) se asigna en v4l2_m2m_register_entity pero no se libera en las siguientes rutas de manejo de errores. Este parche agrega dicha desasignación para evitar la fuga de memoria de entidad->nombre. • https://git.kernel.org/stable/c/be2fff656322e82f215730839063c2c2ca73d14b https://git.kernel.org/stable/c/3dd8abb0ed0e0a7c66d6d677c86ccb188cc39333 https://git.kernel.org/stable/c/0175f2d34c85744f9ad6554f696cf0afb5bd04e4 https://git.kernel.org/stable/c/afd2a82fe300032f63f8be5d6cd6981e75f8bbf2 https://git.kernel.org/stable/c/dc866b69cc51af9b8509b4731b8ce2a4950cd0ef https://git.kernel.org/stable/c/0c9550b032de48d6a7fa6a4ddc09699d64d9300d https://git.kernel.org/stable/c/90029b9c979b60de5cb2b70ade4bbf61d561bc5d https://git.kernel.org/stable/c/5dc319cc3c4f7b74f7dfba349aa26f87e •
CVSS: -EPSS: 0%CPEs: 8EXPL: 0CVE-2024-27076 – media: imx: csc/scaler: fix v4l2_ctrl_handler memory leak
https://notcve.org/view.php?id=CVE-2024-27076
In the Linux kernel, the following vulnerability has been resolved: media: imx: csc/scaler: fix v4l2_ctrl_handler memory leak Free the memory allocated in v4l2_ctrl_handler_init on release. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: medios: imx: csc/scaler: corrige la pérdida de memoria v4l2_ctrl_handler Libere la memoria asignada en v4l2_ctrl_handler_init en el lanzamiento. • https://git.kernel.org/stable/c/a8ef0488cc592921a917362cca66af4a601987b9 https://git.kernel.org/stable/c/8c2e4efe1278cd2b230cdbf90a6cefbf00acc282 https://git.kernel.org/stable/c/5d9fe604bf9b5b09d2215225df55f22a4cbbc684 https://git.kernel.org/stable/c/b1d0eebaf87cc9ccd05f779ec4a0589f95d6c18b https://git.kernel.org/stable/c/8df9a3c7044b847e9c4dc7e683fd64c6b873f328 https://git.kernel.org/stable/c/d164ddc21e986dd9ad614b4b01746e5457aeb24f https://git.kernel.org/stable/c/42492b00156c03a79fd4851190aa63045d6a15ce https://git.kernel.org/stable/c/6c92224721a439d6350db5933a1060768 •