CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2023-52633 – um: time-travel: fix time corruption
https://notcve.org/view.php?id=CVE-2023-52633
In the Linux kernel, the following vulnerability has been resolved: um: time-travel: fix time corruption In 'basic' time-travel mode (without =inf-cpu or =ext), we still get timer interrupts. These can happen at arbitrary points in time, i.e. while in timer_read(), which pushes time forward just a little bit. Then, if we happen to get the interrupt after calculating the new time to push to, but before actually finishing that, the interrupt will set the time to a value that's incompatible with the forward, and we'll crash because time goes backwards when we do the forwarding. Fix this by reading the time_travel_time, calculating the adjustment, and doing the adjustment all with interrupts disabled. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: um: viaje en el tiempo: corrige la corrupción del tiempo En el modo de viaje en el tiempo 'básico' (sin =inf-cpu o =ext), todavía obtenemos interrupciones del temporizador. Esto puede suceder en momentos arbitrarios en el tiempo, es decir, mientras está en timer_read(), lo que adelanta un poco el tiempo. • https://git.kernel.org/stable/c/0c7478a2da3f5fe106b4658338873d50c86ac7ab https://git.kernel.org/stable/c/4f7dad73df4cdb2b7042103d3922745d040ad025 https://git.kernel.org/stable/c/de3e9d8e8d1ae0a4d301109d1ec140796901306c https://git.kernel.org/stable/c/b427f55e9d4185f6f17cc1e3296eb8d0c4425283 https://git.kernel.org/stable/c/abe4eaa8618bb36c2b33e9cdde0499296a23448c •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2023-52632 – drm/amdkfd: Fix lock dependency warning with srcu
https://notcve.org/view.php?id=CVE-2023-52632
In the Linux kernel, the following vulnerability has been resolved: drm/amdkfd: Fix lock dependency warning with srcu ====================================================== WARNING: possible circular locking dependency detected 6.5.0-kfd-yangp #2289 Not tainted ------------------------------------------------------ kworker/0:2/996 is trying to acquire lock: (srcu){.+.+}-{0:0}, at: __synchronize_srcu+0x5/0x1a0 but task is already holding lock: ((work_completion)(&svms->deferred_list_work)){+.+.}-{0:0}, at: process_one_work+0x211/0x560 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 ((work_completion)(&svms->deferred_list_work)){+.+.}-{0:0}: __flush_work+0x88/0x4f0 svm_range_list_lock_and_flush_work+0x3d/0x110 [amdgpu] svm_range_set_attr+0xd6/0x14c0 [amdgpu] kfd_ioctl+0x1d1/0x630 [amdgpu] __x64_sys_ioctl+0x88/0xc0 -> #2 (&info->lock#2){+.+.}-{3:3}: __mutex_lock+0x99/0xc70 amdgpu_amdkfd_gpuvm_restore_process_bos+0x54/0x740 [amdgpu] restore_process_helper+0x22/0x80 [amdgpu] restore_process_worker+0x2d/0xa0 [amdgpu] process_one_work+0x29b/0x560 worker_thread+0x3d/0x3d0 -> #1 ((work_completion)(&(&process->restore_work)->work)){+.+.}-{0:0}: __flush_work+0x88/0x4f0 __cancel_work_timer+0x12c/0x1c0 kfd_process_notifier_release_internal+0x37/0x1f0 [amdgpu] __mmu_notifier_release+0xad/0x240 exit_mmap+0x6a/0x3a0 mmput+0x6a/0x120 do_exit+0x322/0xb90 do_group_exit+0x37/0xa0 __x64_sys_exit_group+0x18/0x20 do_syscall_64+0x38/0x80 -> #0 (srcu){.+.+}-{0:0}: __lock_acquire+0x1521/0x2510 lock_sync+0x5f/0x90 __synchronize_srcu+0x4f/0x1a0 __mmu_notifier_release+0x128/0x240 exit_mmap+0x6a/0x3a0 mmput+0x6a/0x120 svm_range_deferred_list_work+0x19f/0x350 [amdgpu] process_one_work+0x29b/0x560 worker_thread+0x3d/0x3d0 other info that might help us debug this: Chain exists of: srcu --> &info->lock#2 --> (work_completion)(&svms->deferred_list_work) Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock((work_completion)(&svms->deferred_list_work)); lock(&info->lock#2); lock((work_completion)(&svms->deferred_list_work)); sync(srcu); En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amdkfd: corrige la advertencia de dependencia de bloqueo con srcu ============================== ========================== ADVERTENCIA: posible dependencia de bloqueo circular detectada 6.5.0-kfd-yangp #2289 No contaminado ------ ------------------------------------------------ ktrabajador/ 0:2/996 está intentando adquirir el bloqueo: (srcu){.+.+}-{0:0}, en: __synchronize_srcu+0x5/0x1a0 pero la tarea ya mantiene el bloqueo: ((work_completion)(&svms->deferred_list_work )){+.+.}-{0:0}, en: Process_one_work+0x211/0x560 cuyo bloqueo ya depende del nuevo bloqueo. la cadena de dependencia existente (en orden inverso) es: -> #3 ((work_completion)(&svms->deferred_list_work)){+.+.}-{0:0}: __flush_work+0x88/0x4f0 svm_range_list_lock_and_flush_work+0x3d/0x110 [ amdgpu] svm_range_set_attr+0xd6/0x14c0 [amdgpu] kfd_ioctl+0x1d1/0x630 [amdgpu] __x64_sys_ioctl+0x88/0xc0 -> #2 (&info->lock#2){+.+.}-{3:3}: __mutex_lock+ 0x99/0xc70 amdgpu_amdkfd_gpuvm_restore_process_bos+0x54/0x740 [amdgpu] restaurar_proceso_helper+0x22/0x80 [amdgpu] restaurar_proceso_trabajador+0x2d/0xa0 [amdgpu] proceso_one_work+0x29b/0x560 trabajador_thread+0x3d/0x3d 0 -> #1 ((finalización_trabajo)(&(&proceso- >restore_work)->work)){+.+.}-{0:0}: __flush_work+0x88/0x4f0 __cancel_work_timer+0x12c/0x1c0 kfd_process_notifier_release_internal+0x37/0x1f0 [amdgpu] __mmu_notifier_release+0xad/0x240 exit_mmap+0x6a/0x3 a0 mmentrada +0x6a/0x120 do_exit+0x322/0xb90 do_group_exit+0x37/0xa0 __x64_sys_exit_group+0x18/0x20 do_syscall_64+0x38/0x80 -> #0 (srcu){.+.+}-{0:0}: __lock_acquire+0x1521/0x2 510 lock_sync +0x5f/0x90 __synchronize_srcu+0x4f/0x1a0 __mmu_notifier_release+0x128/0x240 exit_mmap+0x6a/0x3a0 mmput+0x6a/0x120 svm_range_deferred_list_work+0x19f/0x350 [amdgpu] Process_one_work+0x29b/0 x560 trabajador_thread+0x3d/0x3d0 otra información que podría ayudarnos a depurar esto : Existe cadena de: srcu --> &info->lock#2 --> (work_completion)(&svms->deferred_list_work) Posible escenario de bloqueo inseguro: CPU0 CPU1 ---- ---- lock((work_completion)(&svms- >lista_trabajo_diferido)); bloquear(&info->bloquear#2); lock((work_completion)(&svms->deferred_list_work)); sincronización(srcu); • https://git.kernel.org/stable/c/b602f098f716723fa5c6c96a486e0afba83b7b94 https://git.kernel.org/stable/c/752312f6a79440086ac0f9b08d7776870037323c https://git.kernel.org/stable/c/1556c242e64cdffe58736aa650b0b395854fe4d4 https://git.kernel.org/stable/c/2a9de42e8d3c82c6990d226198602be44f43f340 •
CVSS: 4.1EPSS: 0%CPEs: 6EXPL: 0CVE-2024-26659 – xhci: handle isoc Babble and Buffer Overrun events properly
https://notcve.org/view.php?id=CVE-2024-26659
In the Linux kernel, the following vulnerability has been resolved: xhci: handle isoc Babble and Buffer Overrun events properly xHCI 4.9 explicitly forbids assuming that the xHC has released its ownership of a multi-TRB TD when it reports an error on one of the early TRBs. Yet the driver makes such assumption and releases the TD, allowing the remaining TRBs to be freed or overwritten by new TDs. The xHC should also report completion of the final TRB due to its IOC flag being set by us, regardless of prior errors. This event cannot be recognized if the TD has already been freed earlier, resulting in "Transfer event TRB DMA ptr not part of current TD" error message. Fix this by reusing the logic for processing isoc Transaction Errors. This also handles hosts which fail to report the final completion. Fix transfer length reporting on Babble errors. They may be caused by device malfunction, no guarantee that the buffer has been filled. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: xhci: maneja correctamente los eventos isoc Babble y Buffer Overrun xHCI 4.9 prohíbe explícitamente suponer que xHC ha liberado su propiedad de un TD multi-TRB cuando informa un error en uno de los primeros TRB. • https://git.kernel.org/stable/c/696e4112e5c1ee61996198f0ebb6ca3fab55166e https://git.kernel.org/stable/c/2aa7bcfdbb46241c701811bbc0d64d7884e3346c https://git.kernel.org/stable/c/2e3ec80ea7ba58bbb210e83b5a0afefee7c171d3 https://git.kernel.org/stable/c/f5e7ffa9269a448a720e21f1ed1384d118298c97 https://git.kernel.org/stable/c/418456c0ce56209610523f21734c5612ee634134 https://git.kernel.org/stable/c/7c4650ded49e5b88929ecbbb631efb8b0838e811 https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html https://access.redhat.com/security/cve/CVE-2024 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: -EPSS: 0%CPEs: 2EXPL: 0CVE-2024-26658 – bcachefs: grab s_umount only if snapshotting
https://notcve.org/view.php?id=CVE-2024-26658
In the Linux kernel, the following vulnerability has been resolved: bcachefs: grab s_umount only if snapshotting When I was testing mongodb over bcachefs with compression, there is a lockdep warning when snapshotting mongodb data volume. $ cat test.sh prog=bcachefs $prog subvolume create /mnt/data $prog subvolume create /mnt/data/snapshots while true;do $prog subvolume snapshot /mnt/data /mnt/data/snapshots/$(date +%s) sleep 1s done $ cat /etc/mongodb.conf systemLog: destination: file logAppend: true path: /mnt/data/mongod.log storage: dbPath: /mnt/data/ lockdep reports: [ 3437.452330] ====================================================== [ 3437.452750] WARNING: possible circular locking dependency detected [ 3437.453168] 6.7.0-rc7-custom+ #85 Tainted: G E [ 3437.453562] ------------------------------------------------------ [ 3437.453981] bcachefs/35533 is trying to acquire lock: [ 3437.454325] ffffa0a02b2b1418 (sb_writers#10){.+.+}-{0:0}, at: filename_create+0x62/0x190 [ 3437.454875] but task is already holding lock: [ 3437.455268] ffffa0a02b2b10e0 (&type->s_umount_key#48){.+.+}-{3:3}, at: bch2_fs_file_ioctl+0x232/0xc90 [bcachefs] [ 3437.456009] which lock already depends on the new lock. [ 3437.456553] the existing dependency chain (in reverse order) is: [ 3437.457054] -> #3 (&type->s_umount_key#48){.+.+}-{3:3}: [ 3437.457507] down_read+0x3e/0x170 [ 3437.457772] bch2_fs_file_ioctl+0x232/0xc90 [bcachefs] [ 3437.458206] __x64_sys_ioctl+0x93/0xd0 [ 3437.458498] do_syscall_64+0x42/0xf0 [ 3437.458779] entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 3437.459155] -> #2 (&c->snapshot_create_lock){++++}-{3:3}: [ 3437.459615] down_read+0x3e/0x170 [ 3437.459878] bch2_truncate+0x82/0x110 [bcachefs] [ 3437.460276] bchfs_truncate+0x254/0x3c0 [bcachefs] [ 3437.460686] notify_change+0x1f1/0x4a0 [ 3437.461283] do_truncate+0x7f/0xd0 [ 3437.461555] path_openat+0xa57/0xce0 [ 3437.461836] do_filp_open+0xb4/0x160 [ 3437.462116] do_sys_openat2+0x91/0xc0 [ 3437.462402] __x64_sys_openat+0x53/0xa0 [ 3437.462701] do_syscall_64+0x42/0xf0 [ 3437.462982] entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 3437.463359] -> #1 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}: [ 3437.463843] down_write+0x3b/0xc0 [ 3437.464223] bch2_write_iter+0x5b/0xcc0 [bcachefs] [ 3437.464493] vfs_write+0x21b/0x4c0 [ 3437.464653] ksys_write+0x69/0xf0 [ 3437.464839] do_syscall_64+0x42/0xf0 [ 3437.465009] entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 3437.465231] -> #0 (sb_writers#10){.+.+}-{0:0}: [ 3437.465471] __lock_acquire+0x1455/0x21b0 [ 3437.465656] lock_acquire+0xc6/0x2b0 [ 3437.465822] mnt_want_write+0x46/0x1a0 [ 3437.465996] filename_create+0x62/0x190 [ 3437.466175] user_path_create+0x2d/0x50 [ 3437.466352] bch2_fs_file_ioctl+0x2ec/0xc90 [bcachefs] [ 3437.466617] __x64_sys_ioctl+0x93/0xd0 [ 3437.466791] do_syscall_64+0x42/0xf0 [ 3437.466957] entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 3437.467180] other info that might help us debug this: [ 3437.469670] 2 locks held by bcachefs/35533: other info that might help us debug this: [ 3437.467507] Chain exists of: sb_writers#10 --> &c->snapshot_create_lock --> &type->s_umount_key#48 [ 3437.467979] Possible unsafe locking scenario: [ 3437.468223] CPU0 CPU1 [ 3437.468405] ---- ---- [ 3437.468585] rlock(&type->s_umount_key#48); [ 3437.468758] lock(&c->snapshot_create_lock); [ 3437.469030] lock(&type->s_umount_key#48); [ 3437.469291] rlock(sb_writers#10); [ 3437.469434] *** DEADLOCK *** [ 3437.469 ---truncated--- En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bcachefs: toma s_umount solo si se toma una instantánea Cuando estaba probando mongodb sobre bcachefs con compresión, hay una advertencia de lockdep al tomar una instantánea del volumen de datos de mongodb. $ cat test.sh prog=bcachefs $prog subvolumen crear /mnt/data $prog subvolumen crear /mnt/data/snapshots mientras es verdadero;do $prog subvolumen snapshot /mnt/data /mnt/data/snapshots/$(fecha +% s) dormir 1 hecho $ cat /etc/mongodb.conf systemLog: destino: archivo logAppend: verdadera ruta: /mnt/data/mongod.log almacenamiento: dbPath: /mnt/data/ lockdep informes: [3437.452330] ==== ==================================================== [ 3437.452750] ADVERTENCIA: posible dependencia de bloqueo circular detectada [ 3437.453168] 6.7.0-rc7-custom+ #85 Contaminado: GE [ 3437.453562] ---------------------- -------------------------------- [ 3437.453981] bcachefs/35533 está intentando adquirir el bloqueo: [ 3437.454325] ffffa0a02b2b1418 (sb_writers #10){.+.+}-{0:0}, en: filename_create+0x62/0x190 [ 3437.454875] pero la tarea ya mantiene el bloqueo: [ 3437.455268] ffffa0a02b2b10e0 (&type->s_umount_key#48){.+.+ }-{3:3}, en: bch2_fs_file_ioctl+0x232/0xc90 [bcachefs] [ 3437.456009] cuyo bloqueo ya depende del nuevo bloqueo. [ 3437.456553] la cadena de dependencia existente (en orden inverso) es: [ 3437.457054] -> #3 (&type->s_umount_key#48){.+.+}-{3:3}: [ 3437.457507] down_read+0x3e/0x170 [ 3437.457772] bch2_fs_file_ioctl+0x232/0xc90 [bcachefs] [ 3437.458206] __x64_sys_ioctl+0x93/0xd0 [ 3437.458498] do_syscall_64+0x42/0xf0 [ 3437.458 779] Entry_SYSCALL_64_after_hwframe+0x6e/0x76 [3437.459155] -> #2 (&c->snapshot_create_lock){+ +++}-{3:3}: [ 3437.459615] down_read+0x3e/0x170 [ 3437.459878] bch2_truncate+0x82/0x110 [bcachefs] [ 3437.460276] bchfs_truncate+0x254/0x3c0 [bcachefs] [ 3437.4 60686] notificar_cambio+0x1f1/0x4a0 [ 3437.461283] do_truncate+0x7f/0xd0 [ 3437.461555] path_openat+0xa57/0xce0 [ 3437.461836] do_filp_open+0xb4/0x160 [ 3437.462116] do_sys_openat2+0x91/0xc0 [ 34 37.462402] __x64_sys_openat+0x53/0xa0 [ 3437.462701] do_syscall_64+0x42/0xf0 [ 3437.462982] Entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 3437.463359] -> #1 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}: [ 3437.463843] down_write+0x3b/0xc0 [ 3437.464223] bch2_write_it e+0x5b /0xcc0 [bcachefs] [ 3437.464493] vfs_write+0x21b/0x4c0 [ 3437.464653] ksys_write+0x69/0xf0 [ 3437.464839] do_syscall_64+0x42/0xf0 [ 3437.465009] entrada_SYSCALL _64_after_hwframe+0x6e/0x76 [ 3437.465231] -> #0 (sb_writers#10){ .+.+}-{0:0}: [ 3437.465471] __lock_acquire+0x1455/0x21b0 [ 3437.465656] lock_acquire+0xc6/0x2b0 [ 3437.465822] mnt_want_write+0x46/0x1a0 [ 3437.465996] nombre de archivo _create+0x62/0x190 [ 3437.466175] ruta_usuario_create+0x2d /0x50 [ 3437.466352] bch2_fs_file_ioctl+0x2ec/0xc90 [bcachefs] [ 3437.466617] __x64_sys_ioctl+0x93/0xd0 [ 3437.466791] do_syscall_64+0x42/0xf0 [ 3437 .466957] Entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 3437.467180] otra información que podría ayudarnos a depurar esto: [ 3437.469670] 2 bloqueos mantenidos por bcachefs/35533: otra información que podría ayudarnos a depurar esto: [3437.467507] Existe cadena de: sb_writers#10 --> &c->snapshot_create_lock --> &type->s_umount_key#48 [3437.467979] Posiblemente inseguro escenario de bloqueo: [3437.468223] CPU0 CPU1 [3437.468405] ---- ---- [3437.468585] rlock(&type->s_umount_key#48); [ 3437.468758] bloqueo(&c->snapshot_create_lock); [ 3437.469030] bloqueo(&type->s_umount_key#48); [3437.469291] rlock(sb_writers#10); [ 3437.469434] *** INTERBLOQUEO *** [ 3437.469 ---truncado--- • https://git.kernel.org/stable/c/5b41d3fd04c6757b9c2a60a0c5b2609cae9999df https://git.kernel.org/stable/c/2acc59dd88d27ad69b66ded80df16c042b04eeec •
CVSS: 4.7EPSS: 0%CPEs: 4EXPL: 0CVE-2024-26656 – drm/amdgpu: fix use-after-free bug
https://notcve.org/view.php?id=CVE-2024-26656
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: fix use-after-free bug The bug can be triggered by sending a single amdgpu_gem_userptr_ioctl to the AMDGPU DRM driver on any ASICs with an invalid address and size. The bug was reported by Joonkyo Jung <joonkyoj@yonsei.ac.kr>. For example the following code: static void Syzkaller1(int fd) { struct drm_amdgpu_gem_userptr arg; int ret; arg.addr = 0xffffffffffff0000; arg.size = 0x80000000; /*2 Gb*/ arg.flags = 0x7; ret = drmIoctl(fd, 0xc1186451/*amdgpu_gem_userptr_ioctl*/, &arg); } Due to the address and size are not valid there is a failure in amdgpu_hmm_register->mmu_interval_notifier_insert->__mmu_interval_notifier_insert-> check_shl_overflow, but we even the amdgpu_hmm_register failure we still call amdgpu_hmm_unregister into amdgpu_gem_object_free which causes access to a bad address. The following stack is below when the issue is reproduced when Kazan is enabled: [ +0.000014] Hardware name: ASUS System Product Name/ROG STRIX B550-F GAMING (WI-FI), BIOS 1401 12/03/2020 [ +0.000009] RIP: 0010:mmu_interval_notifier_remove+0x327/0x340 [ +0.000017] Code: ff ff 49 89 44 24 08 48 b8 00 01 00 00 00 00 ad de 4c 89 f7 49 89 47 40 48 83 c0 22 49 89 47 48 e8 ce d1 2d 01 e9 32 ff ff ff <0f> 0b e9 16 ff ff ff 4c 89 ef e8 fa 14 b3 ff e9 36 ff ff ff e8 80 [ +0.000014] RSP: 0018:ffffc90002657988 EFLAGS: 00010246 [ +0.000013] RAX: 0000000000000000 RBX: 1ffff920004caf35 RCX: ffffffff8160565b [ +0.000011] RDX: dffffc0000000000 RSI: 0000000000000004 RDI: ffff8881a9f78260 [ +0.000010] RBP: ffffc90002657a70 R08: 0000000000000001 R09: fffff520004caf25 [ +0.000010] R10: 0000000000000003 R11: ffffffff8161d1d6 R12: ffff88810e988c00 [ +0.000010] R13: ffff888126fb5a00 R14: ffff88810e988c0c R15: ffff8881a9f78260 [ +0.000011] FS: 00007ff9ec848540(0000) GS:ffff8883cc880000(0000) knlGS:0000000000000000 [ +0.000012] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ +0.000010] CR2: 000055b3f7e14328 CR3: 00000001b5770000 CR4: 0000000000350ef0 [ +0.000010] Call Trace: [ +0.000006] <TASK> [ +0.000007] ? show_regs+0x6a/0x80 [ +0.000018] ? __warn+0xa5/0x1b0 [ +0.000019] ? mmu_interval_notifier_remove+0x327/0x340 [ +0.000018] ? report_bug+0x24a/0x290 [ +0.000022] ? • https://git.kernel.org/stable/c/e87e08c94c9541b4e18c4c13f2f605935f512605 https://git.kernel.org/stable/c/af054a5fb24a144f99895afce9519d709891894c https://git.kernel.org/stable/c/22f665ecfd1225afa1309ace623157d12bb9bb0c https://git.kernel.org/stable/c/22207fd5c80177b860279653d017474b2812af5e https://access.redhat.com/security/cve/CVE-2024-26656 https://bugzilla.redhat.com/show_bug.cgi?id=2272692 • CWE-416: Use After Free •