CVSS: 4.4EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52771 – cxl/port: Fix delete_endpoint() vs parent unregistration race
https://notcve.org/view.php?id=CVE-2023-52771
In the Linux kernel, the following vulnerability has been resolved: cxl/port: Fix delete_endpoint() vs parent unregistration race The CXL subsystem, at cxl_mem ->probe() time, establishes a lineage of ports (struct cxl_port objects) between an endpoint and the root of a CXL topology. Each port including the endpoint port is attached to the cxl_port driver. Given that setup, it follows that when either any port in that lineage goes through a cxl_port ->remove() event, or the memdev goes through a cxl_mem ->remove() event. The hierarchy below the removed port, or the entire hierarchy if the memdev is removed needs to come down. The delete_endpoint() callback is careful to check whether it is being called to tear down the hierarchy, or if it is only being called to teardown the memdev because an ancestor port is going through ->remove(). That care needs to take the device_lock() of the endpoint's parent. Which requires 2 bugs to be fixed: 1/ A reference on the parent is needed to prevent use-after-free scenarios like this signature: BUG: spinlock bad magic on CPU#0, kworker/u56:0/11 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS edk2-20230524-3.fc38 05/24/2023 Workqueue: cxl_port detach_memdev [cxl_core] RIP: 0010:spin_bug+0x65/0xa0 Call Trace: do_raw_spin_lock+0x69/0xa0 __mutex_lock+0x695/0xb80 delete_endpoint+0xad/0x150 [cxl_core] devres_release_all+0xb8/0x110 device_unbind_cleanup+0xe/0x70 device_release_driver_internal+0x1d2/0x210 detach_memdev+0x15/0x20 [cxl_core] process_one_work+0x1e3/0x4c0 worker_thread+0x1dd/0x3d0 2/ In the case of RCH topologies, the parent device that needs to be locked is not always @port->dev as returned by cxl_mem_find_port(), use endpoint->dev.parent instead. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cxl/port: corrige delete_endpoint() frente a la ejecución de cancelación del registro principal. El subsistema CXL, en el momento cxl_mem ->probe(), establece un linaje de puertos (objetos struct cxl_port) entre un punto final y la raíz de una topología CXL. • https://git.kernel.org/stable/c/8dd2bc0f8e02d39bd80851ca787bcbdb7d495e69 https://git.kernel.org/stable/c/37179fcc916bce8c3cc7b36d67ef814cce55142b https://git.kernel.org/stable/c/6b2e428e673b3f55965674a426c40922e91388aa https://git.kernel.org/stable/c/8d2ad999ca3c64cb08cf6a58d227b9d9e746d708 https://access.redhat.com/security/cve/CVE-2023-52771 https://bugzilla.redhat.com/show_bug.cgi?id=2282720 • CWE-413: Improper Resource Locking •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52770 – f2fs: split initial and dynamic conditions for extent_cache
https://notcve.org/view.php?id=CVE-2023-52770
In the Linux kernel, the following vulnerability has been resolved: f2fs: split initial and dynamic conditions for extent_cache Let's allocate the extent_cache tree without dynamic conditions to avoid a missing condition causing a panic as below. # create a file w/ a compressed flag # disable the compression # panic while updating extent_cache F2FS-fs (dm-64): Swapfile: last extent is not aligned to section F2FS-fs (dm-64): Swapfile (3) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * N) Adding 124996k swap on ./swap-file. Priority:0 extents:2 across:17179494468k ================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read_write out/common/include/linux/instrumented.h:101 [inline] BUG: KASAN: null-ptr-deref in atomic_try_cmpxchg_acquire out/common/include/asm-generic/atomic-instrumented.h:705 [inline] BUG: KASAN: null-ptr-deref in queued_write_lock out/common/include/asm-generic/qrwlock.h:92 [inline] BUG: KASAN: null-ptr-deref in __raw_write_lock out/common/include/linux/rwlock_api_smp.h:211 [inline] BUG: KASAN: null-ptr-deref in _raw_write_lock+0x5a/0x110 out/common/kernel/locking/spinlock.c:295 Write of size 4 at addr 0000000000000030 by task syz-executor154/3327 CPU: 0 PID: 3327 Comm: syz-executor154 Tainted: G O 5.10.185 #1 Hardware name: emulation qemu-x86/qemu-x86, BIOS 2023.01-21885-gb3cc1cd24d 01/01/2023 Call Trace: __dump_stack out/common/lib/dump_stack.c:77 [inline] dump_stack_lvl+0x17e/0x1c4 out/common/lib/dump_stack.c:118 __kasan_report+0x16c/0x260 out/common/mm/kasan/report.c:415 kasan_report+0x51/0x70 out/common/mm/kasan/report.c:428 kasan_check_range+0x2f3/0x340 out/common/mm/kasan/generic.c:186 __kasan_check_write+0x14/0x20 out/common/mm/kasan/shadow.c:37 instrument_atomic_read_write out/common/include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire out/common/include/asm-generic/atomic-instrumented.h:705 [inline] queued_write_lock out/common/include/asm-generic/qrwlock.h:92 [inline] __raw_write_lock out/common/include/linux/rwlock_api_smp.h:211 [inline] _raw_write_lock+0x5a/0x110 out/common/kernel/locking/spinlock.c:295 __drop_extent_tree+0xdf/0x2f0 out/common/fs/f2fs/extent_cache.c:1155 f2fs_drop_extent_tree+0x17/0x30 out/common/fs/f2fs/extent_cache.c:1172 f2fs_insert_range out/common/fs/f2fs/file.c:1600 [inline] f2fs_fallocate+0x19fd/0x1f40 out/common/fs/f2fs/file.c:1764 vfs_fallocate+0x514/0x9b0 out/common/fs/open.c:310 ksys_fallocate out/common/fs/open.c:333 [inline] __do_sys_fallocate out/common/fs/open.c:341 [inline] __se_sys_fallocate out/common/fs/open.c:339 [inline] __x64_sys_fallocate+0xb8/0x100 out/common/fs/open.c:339 do_syscall_64+0x35/0x50 out/common/arch/x86/entry/common.c:46 En el kernel de Linux, se resolvió la siguiente vulnerabilidad: f2fs: condiciones iniciales y dinámicas divididas para extend_cache. Asignemos el árbol extend_cache sin condiciones dinámicas para evitar que una condición faltante cause pánico como se muestra a continuación. # crear un archivo con una bandera comprimida # desactivar la compresión # entrar en pánico al actualizar extend_cache F2FS-fs (dm-64): Swapfile: la última extensión no está alineada con la sección F2FS-fs (dm-64): Swapfile (3) es no alinearse con la sección: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(2097152 * N) Agregando 124996k swap en ./swap-file. • https://git.kernel.org/stable/c/72840cccc0a1a0a0dc1bb27b669a9111be6d0f6a https://git.kernel.org/stable/c/4377b1d3b19e1369d094a94596211a9815ddbb04 https://git.kernel.org/stable/c/9de787139b0258a5dd1f498780c26d76b61d2958 https://git.kernel.org/stable/c/d83309e7e006cee8afca83523559017c824fbf7a https://git.kernel.org/stable/c/f803982190f0265fd36cf84670aa6daefc2b0768 •
CVSS: 7.8EPSS: 0%CPEs: 3EXPL: 0CVE-2023-52769 – wifi: ath12k: fix htt mlo-offset event locking
https://notcve.org/view.php?id=CVE-2023-52769
In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix htt mlo-offset event locking The ath12k active pdevs are protected by RCU but the htt mlo-offset event handling code calling ath12k_mac_get_ar_by_pdev_id() was not marked as a read-side critical section. Mark the code in question as an RCU read-side critical section to avoid any potential use-after-free issues. Compile tested only. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: wifi: ath12k: corrige el bloqueo de eventos htt mlo-offset Los pdevs activos de ath12k están protegidos por RCU, pero el código de manejo de eventos htt mlo-offset que llama a ath12k_mac_get_ar_by_pdev_id() no se marcó como read-side de Sección crítica. Marque el código en cuestión como una sección crítica del lado de lectura de RCU para evitar posibles problemas de use after free. Compilación probada únicamente. • https://git.kernel.org/stable/c/d889913205cf7ebda905b1e62c5867ed4e39f6c2 https://git.kernel.org/stable/c/d908ca431e20b0e4bfc5d911d1744910ed779bdb https://git.kernel.org/stable/c/afd3425bd69610f318403084fe491e24a1357fb9 https://git.kernel.org/stable/c/6afc57ea315e0f660b1f870a681737bb7b71faef • CWE-416: Use After Free •
CVSS: -EPSS: 0%CPEs: 6EXPL: 0CVE-2023-52768 – wifi: wilc1000: use vmm_table as array in wilc struct
https://notcve.org/view.php?id=CVE-2023-52768
In the Linux kernel, the following vulnerability has been resolved: wifi: wilc1000: use vmm_table as array in wilc struct Enabling KASAN and running some iperf tests raises some memory issues with vmm_table: BUG: KASAN: slab-out-of-bounds in wilc_wlan_handle_txq+0x6ac/0xdb4 Write of size 4 at addr c3a61540 by task wlan0-tx/95 KASAN detects that we are writing data beyond range allocated to vmm_table. There is indeed a mismatch between the size passed to allocator in wilc_wlan_init, and the range of possible indexes used later: allocation size is missing a multiplication by sizeof(u32) En el kernel de Linux, se resolvió la siguiente vulnerabilidad: wifi: wilc1000: use vmm_table como matriz en wilc struct. Al habilitar KASAN y ejecutar algunas pruebas de iperf se generan algunos problemas de memoria con vmm_table: BUG: KASAN: slab-out-of-bounds en wilc_wlan_handle_txq +0x6ac/0xdb4 Escritura de tamaño 4 en la dirección c3a61540 mediante la tarea wlan0-tx/95 KASAN detecta que estamos escribiendo datos más allá del rango asignado a vmm_table. De hecho, existe una discrepancia entre el tamaño pasado al asignador en wilc_wlan_init y el rango de posibles índices utilizados más adelante: al tamaño de la asignación le falta una multiplicación por sizeof(u32) • https://git.kernel.org/stable/c/32dd0b22a5ba1dd296ccf2caf46ad44c3a8d5d98 https://git.kernel.org/stable/c/40b717bfcefab28a0656b8caa5e43d5449e5a671 https://git.kernel.org/stable/c/5212d958f6518003cd98c9886f8e8aedcfc25741 https://git.kernel.org/stable/c/541b3757fd443a68ed8d25968eae511a8275e7c8 https://git.kernel.org/stable/c/4b0d6ddb6466d10df878a7787f175a0e4adc3e27 https://git.kernel.org/stable/c/6aaf7cd8bdfe245d3c9a8b48fe70c2011965948e https://git.kernel.org/stable/c/3ce1c2c3999b232258f7aabab311d47dda75605c https://git.kernel.org/stable/c/05ac1a198a63ad66bf5ae8b7321407c10 •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2023-52767 – tls: fix NULL deref on tls_sw_splice_eof() with empty record
https://notcve.org/view.php?id=CVE-2023-52767
In the Linux kernel, the following vulnerability has been resolved: tls: fix NULL deref on tls_sw_splice_eof() with empty record syzkaller discovered that if tls_sw_splice_eof() is executed as part of sendfile() when the plaintext/ciphertext sk_msg are empty, the send path gets confused because the empty ciphertext buffer does not have enough space for the encryption overhead. This causes tls_push_record() to go on the `split = true` path (which is only supposed to be used when interacting with an attached BPF program), and then get further confused and hit the tls_merge_open_record() path, which then assumes that there must be at least one populated buffer element, leading to a NULL deref. It is possible to have empty plaintext/ciphertext buffers if we previously bailed from tls_sw_sendmsg_locked() via the tls_trim_both_msgs() path. tls_sw_push_pending_record() already handles this case correctly; let's do the same check in tls_sw_splice_eof(). En el kernel de Linux, se resolvió la siguiente vulnerabilidad: tls: corrige NULL deref en tls_sw_splice_eof() con registro vacío syzkaller descubrió que si tls_sw_splice_eof() se ejecuta como parte de sendfile() cuando el texto plano/texto cifrado sk_msg está vacío, el envío La ruta se confunde porque el búfer de texto cifrado vacío no tiene suficiente espacio para la sobrecarga de cifrado. Esto hace que tls_push_record() vaya a la ruta `split = true` (que se supone que solo debe usarse al interactuar con un programa BPF adjunto), y luego se confunda aún más y acceda a la ruta tls_merge_open_record(), que luego supone que hay debe haber al menos un elemento de búfer poblado, lo que lleva a una deref NULL. Es posible tener buffers de texto plano/texto cifrado vacíos si previamente salimos de tls_sw_sendmsg_locked() a través de la ruta tls_trim_both_msgs(). tls_sw_push_pending_record() ya maneja este caso correctamente; hagamos la misma verificación en tls_sw_splice_eof(). • https://git.kernel.org/stable/c/df720d288dbb1793e82b6ccbfc670ec871e9def4 https://git.kernel.org/stable/c/2214e2bb5489145aba944874d0ee1652a0a63dc8 https://git.kernel.org/stable/c/53f2cb491b500897a619ff6abd72f565933760f0 https://git.kernel.org/stable/c/944900fe2736c07288efe2d9394db4d3ca23f2c9 •