CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2024-38588 – ftrace: Fix possible use-after-free issue in ftrace_location()
https://notcve.org/view.php?id=CVE-2024-38588
In the Linux kernel, the following vulnerability has been resolved: ftrace: Fix possible use-after-free issue in ftrace_location() KASAN reports a bug: BUG: KASAN: use-after-free in ftrace_location+0x90/0x120 Read of size 8 at addr ffff888141d40010 by task insmod/424 CPU: 8 PID: 424 Comm: insmod Tainted: G W 6.9.0-rc2+ [...] Call Trace: <TASK> dump_stack_lvl+0x68/0xa0 print_report+0xcf/0x610 kasan_report+0xb5/0xe0 ftrace_location+0x90/0x120 register_kprobe+0x14b/0xa40 kprobe_init+0x2d/0xff0 [kprobe_example] do_one_initcall+0x8f/0x2d0 do_init_module+0x13a/0x3c0 load_module+0x3082/0x33d0 init_module_from_file+0xd2/0x130 __x64_sys_finit_module+0x306/0x440 do_syscall_64+0x68/0x140 entry_SYSCALL_64_after_hwframe+0x71/0x79 The root cause is that, in lookup_rec(), ftrace record of some address is being searched in ftrace pages of some module, but those ftrace pages at the same time is being freed in ftrace_release_mod() as the corresponding module is being deleted: CPU1 | CPU2 register_kprobes() { | delete_module() { check_kprobe_address_safe() { | arch_check_ftrace_location() { | ftrace_location() { | lookup_rec() // USE! | ftrace_release_mod() // Free! To fix this issue: 1. Hold rcu lock as accessing ftrace pages in ftrace_location_range(); 2. Use ftrace_location_range() instead of lookup_rec() in ftrace_location(); 3. • https://git.kernel.org/stable/c/ae6aa16fdc163afe6b04b6c073ad4ddd4663c03b https://git.kernel.org/stable/c/eea46baf145150910ba134f75a67106ba2222c1b https://git.kernel.org/stable/c/1880a324af1c95940a7c954b6b937e86844a33bd https://git.kernel.org/stable/c/8ea8ef5e42173560ac510e92a1cc797ffeea8831 https://git.kernel.org/stable/c/dbff5f0bfb2416b8b55c105ddbcd4f885e98fada https://git.kernel.org/stable/c/7b4881da5b19f65709f5c18c1a4d8caa2e496461 https://git.kernel.org/stable/c/66df065b3106964e667b37bf8f7e55ec69d0c1f6 https://git.kernel.org/stable/c/31310e373f4c8c74e029d4326b283e757 • CWE-416: Use After Free •
CVSS: -EPSS: 0%CPEs: 9EXPL: 0CVE-2024-38583 – nilfs2: fix use-after-free of timer for log writer thread
https://notcve.org/view.php?id=CVE-2024-38583
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free of timer for log writer thread Patch series "nilfs2: fix log writer related issues". This bug fix series covers three nilfs2 log writer-related issues, including a timer use-after-free issue and potential deadlock issue on unmount, and a potential freeze issue in event synchronization found during their analysis. Details are described in each commit log. This patch (of 3): A use-after-free issue has been reported regarding the timer sc_timer on the nilfs_sc_info structure. The problem is that even though it is used to wake up a sleeping log writer thread, sc_timer is not shut down until the nilfs_sc_info structure is about to be freed, and is used regardless of the thread's lifetime. Fix this issue by limiting the use of sc_timer only while the log writer thread is alive. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: nilfs2: corrige el use-after-free del temporizador para el hilo del escritor de registros Serie de parches "nilfs2: corrige problemas relacionados con el escritor de registros". Esta serie de corrección de errores cubre tres problemas relacionados con el escritor de registros nilfs2, incluido un problema de use-after-free del temporizador y un posible problema de bloqueo al desmontar, y un posible problema de congelación en la sincronización de eventos encontrado durante su análisis. Los detalles se describen en cada registro de confirmación. • https://git.kernel.org/stable/c/fdce895ea5dd4e24edf1f4d693827349a4e5b3b4 https://git.kernel.org/stable/c/822ae5a8eac30478578a75f7e064f0584931bf2d https://git.kernel.org/stable/c/82933c84f188dcfe89eb26b0b48ab5d1ca99d164 https://git.kernel.org/stable/c/67fa90d4a2ccd9ebb0e1e168c7d0b5d0cf3c7148 https://git.kernel.org/stable/c/e65ccf3a4de4f0c763d94789615b83e11f204438 https://git.kernel.org/stable/c/86a30d6302deddb9fb97ba6fc4b04d0e870b582a https://git.kernel.org/stable/c/f9186bba4ea282b07293c1c892441df3a5441cb0 https://git.kernel.org/stable/c/2f12b2c03c5dae1a0de0a9e5853177e3d •
CVSS: 5.3EPSS: 0%CPEs: 9EXPL: 0CVE-2024-38582 – nilfs2: fix potential hang in nilfs_detach_log_writer()
https://notcve.org/view.php?id=CVE-2024-38582
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential hang in nilfs_detach_log_writer() Syzbot has reported a potential hang in nilfs_detach_log_writer() called during nilfs2 unmount. Analysis revealed that this is because nilfs_segctor_sync(), which synchronizes with the log writer thread, can be called after nilfs_segctor_destroy() terminates that thread, as shown in the call trace below: nilfs_detach_log_writer nilfs_segctor_destroy nilfs_segctor_kill_thread --> Shut down log writer thread flush_work nilfs_iput_work_func nilfs_dispose_list iput nilfs_evict_inode nilfs_transaction_commit nilfs_construct_segment (if inode needs sync) nilfs_segctor_sync --> Attempt to synchronize with log writer thread *** DEADLOCK *** Fix this issue by changing nilfs_segctor_sync() so that the log writer thread returns normally without synchronizing after it terminates, and by forcing tasks that are already waiting to complete once after the thread terminates. The skipped inode metadata flushout will then be processed together in the subsequent cleanup work in nilfs_segctor_destroy(). En el kernel de Linux, se resolvió la siguiente vulnerabilidad: nilfs2: soluciona un posible bloqueo en nilfs_detach_log_writer() Syzbot ha informado de un posible bloqueo en nilfs_detach_log_writer() llamado durante el desmontaje de nilfs2. El análisis reveló que esto se debe a que nilfs_segctor_sync(), que se sincroniza con el hilo del escritor de registros, puede ser llamado después de que nilfs_segctor_destroy() finalice ese hilo, como se muestra en el seguimiento de llamadas a continuación: nilfs_detach_log_writer nilfs_segctor_destroy nilfs_segctor_kill_thread --> Apagar el hilo del escritor de registros Flush_work nilfs_iput_work_func nilfs_dispose_list iput nilfs_evict_inode nilfs_transaction_commit nilfs_construct_segment (si el inodo necesita sincronización) nilfs_segctor_sync --> Intente sincronizar con el hilo del escritor de registros *** DEADLOCK *** Solucione este problema cambiando nilfs_segctor_sync() para que el hilo del escritor de registros regrese normalmente sin sincronizarse después de que termine y forzando las tareas que ya están esperando a completarse una vez que finaliza el hilo. La eliminación de metadatos del inodo omitido se procesará en conjunto en el trabajo de limpieza posterior en nilfs_segctor_destroy(). • https://git.kernel.org/stable/c/911d38be151921a5d152bb55e81fd752384c6830 https://git.kernel.org/stable/c/bc9cee50a4a4ca23bdc49f75ea8242d8a2193b3b https://git.kernel.org/stable/c/eff7cdf890b02596b8d73e910bdbdd489175dbdb https://git.kernel.org/stable/c/06afce714d87c7cd1dcfccbcd800c5c5d2cf1cfd https://git.kernel.org/stable/c/1c3844c5f4eac043954ebf6403fa9fd1f0e9c1c0 https://git.kernel.org/stable/c/a8799662fed1f8747edae87a1937549288baca6a https://git.kernel.org/stable/c/6e5c8e8e024e147b834f56f2115aad241433679b https://git.kernel.org/stable/c/c516db6ab9eabbedbc430b4f93b0d8728 •
CVSS: 7.0EPSS: 0%CPEs: 4EXPL: 0CVE-2024-38581 – drm/amdgpu/mes: fix use-after-free issue
https://notcve.org/view.php?id=CVE-2024-38581
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/mes: fix use-after-free issue Delete fence fallback timer to fix the ramdom use-after-free issue. v2: move to amdgpu_mes.c En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amdgpu/mes: soluciona el problema de use-after-free. Elimina el temporizador de reserva de valla para solucionar el problema de use-after-free. v2: pasar a amdgpu_mes.c A flaw was found in the Linux kernel. This issue is due to a possible use-after-free in drivers/gpu/drm/amd/amdgpu/amdgpu_mes.c. • https://git.kernel.org/stable/c/70b1bf6d9edc8692d241f59a65f073aec6d501de https://git.kernel.org/stable/c/39cfce75168c11421d70b8c0c65f6133edccb82a https://git.kernel.org/stable/c/0f98c144c15c8fc0f3176c994bd4e727ef718a5c https://git.kernel.org/stable/c/948255282074d9367e01908b3f5dcf8c10fc9c3d https://access.redhat.com/security/cve/CVE-2024-38581 https://bugzilla.redhat.com/show_bug.cgi?id=2293408 •
CVSS: 3.3EPSS: 0%CPEs: 5EXPL: 0CVE-2024-38580 – epoll: be better about file lifetimes
https://notcve.org/view.php?id=CVE-2024-38580
In the Linux kernel, the following vulnerability has been resolved: epoll: be better about file lifetimes epoll can call out to vfs_poll() with a file pointer that may race with the last 'fput()'. That would make f_count go down to zero, and while the ep->mtx locking means that the resulting file pointer tear-down will be blocked until the poll returns, it means that f_count is already dead, and any use of it won't actually get a reference to the file any more: it's dead regardless. Make sure we have a valid ref on the file pointer before we call down to vfs_poll() from the epoll routines. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: epoll: mejore la duración de los archivos epoll puede llamar a vfs_poll() con un puntero de archivo que puede competir con el último 'fput()'. Eso haría que f_count bajara a cero, y aunque el bloqueo ep->mtx significa que el desmontaje del puntero del archivo resultante se bloqueará hasta que regrese la encuesta, significa que f_count ya está muerto y no se podrá utilizar. De hecho, ya no obtengo una referencia al archivo: está muerto de todos modos. • https://git.kernel.org/stable/c/cbfd1088e24ec4c1199756a37cb8e4cd0a4b016e https://git.kernel.org/stable/c/559214eb4e5c3d05e69428af2fae2691ba1eb784 https://git.kernel.org/stable/c/4f65f4defe4e23659275ce5153541cd4f76ce2d2 https://git.kernel.org/stable/c/16e3182f6322575eb7c12e728ad3c7986a189d5d https://git.kernel.org/stable/c/4efaa5acf0a1d2b5947f98abb3acf8bfd966422b https://access.redhat.com/security/cve/CVE-2024-38580 https://bugzilla.redhat.com/show_bug.cgi?id=2293412 •