CVSS: 3.3EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48852 – drm/vc4: hdmi: Unregister codec device on unbind
https://notcve.org/view.php?id=CVE-2022-48852
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: hdmi: Unregister codec device on unbind On bind we will register the HDMI codec device but we don't unregister it on unbind, leading to a device leakage. Unregister our device at unbind. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/vc4: hdmi: Anular el registro del dispositivo códec al desvincular. Al vincular, registraremos el dispositivo códec HDMI pero no lo cancelaremos al desvincular, lo que provoca una fuga del dispositivo. Dar de baja nuestro dispositivo en unbind. • https://git.kernel.org/stable/c/ee22082c3e2f230028afa0e22aa8773b1de3c919 https://git.kernel.org/stable/c/1ed68d776246f167aee9cd79f63f089c40a5e2a3 https://git.kernel.org/stable/c/e40945ab7c7f966d0c37b7bd7b0596497dfe228d •
CVSS: 7.8EPSS: 0%CPEs: 8EXPL: 0CVE-2022-48851 – staging: gdm724x: fix use after free in gdm_lte_rx()
https://notcve.org/view.php?id=CVE-2022-48851
In the Linux kernel, the following vulnerability has been resolved: staging: gdm724x: fix use after free in gdm_lte_rx() The netif_rx_ni() function frees the skb so we can't dereference it to save the skb->len. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: staging: gdm724x: corrige el use after free en gdm_lte_rx() La función netif_rx_ni() libera el skb para que no podamos desreferenciarlo para guardar el skb->len. • https://git.kernel.org/stable/c/61e121047645122c47714fcda684d0ee67f444af https://git.kernel.org/stable/c/6dc7b87c62423bfa68139fe95e85028aab584c9a https://git.kernel.org/stable/c/83a9c886c2b5a0d28c0b37e1736b47f38d61332a https://git.kernel.org/stable/c/48ecdf3e29a6e514e8196691589c7dfc6c4ac169 https://git.kernel.org/stable/c/403e3afe241b62401de1f8629c9c6b9b3d69dbff https://git.kernel.org/stable/c/6d9700b445098dbbce0caff4b8cfca214cf1e757 https://git.kernel.org/stable/c/1fb9dd3787495b4deb0efe66c58306b65691a48f https://git.kernel.org/stable/c/d39dc79513e99147b4c158a8a9e46743e • CWE-416: Use After Free •
CVSS: 5.5EPSS: 0%CPEs: 8EXPL: 0CVE-2022-48850 – net-sysfs: add check for netdevice being present to speed_show
https://notcve.org/view.php?id=CVE-2022-48850
In the Linux kernel, the following vulnerability has been resolved: net-sysfs: add check for netdevice being present to speed_show When bringing down the netdevice or system shutdown, a panic can be triggered while accessing the sysfs path because the device is already removed. [ 755.549084] mlx5_core 0000:12:00.1: Shutdown was called [ 756.404455] mlx5_core 0000:12:00.0: Shutdown was called ... [ 757.937260] BUG: unable to handle kernel NULL pointer dereference at (null) [ 758.031397] IP: [<ffffffff8ee11acb>] dma_pool_alloc+0x1ab/0x280 crash> bt ... PID: 12649 TASK: ffff8924108f2100 CPU: 1 COMMAND: "amsd" ... #9 [ffff89240e1a38b0] page_fault at ffffffff8f38c778 [exception RIP: dma_pool_alloc+0x1ab] RIP: ffffffff8ee11acb RSP: ffff89240e1a3968 RFLAGS: 00010046 RAX: 0000000000000246 RBX: ffff89243d874100 RCX: 0000000000001000 RDX: 0000000000000000 RSI: 0000000000000246 RDI: ffff89243d874090 RBP: ffff89240e1a39c0 R8: 000000000001f080 R9: ffff8905ffc03c00 R10: ffffffffc04680d4 R11: ffffffff8edde9fd R12: 00000000000080d0 R13: ffff89243d874090 R14: ffff89243d874080 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #10 [ffff89240e1a39c8] mlx5_alloc_cmd_msg at ffffffffc04680f3 [mlx5_core] #11 [ffff89240e1a3a18] cmd_exec at ffffffffc046ad62 [mlx5_core] #12 [ffff89240e1a3ab8] mlx5_cmd_exec at ffffffffc046b4fb [mlx5_core] #13 [ffff89240e1a3ae8] mlx5_core_access_reg at ffffffffc0475434 [mlx5_core] #14 [ffff89240e1a3b40] mlx5e_get_fec_caps at ffffffffc04a7348 [mlx5_core] #15 [ffff89240e1a3bb0] get_fec_supported_advertised at ffffffffc04992bf [mlx5_core] #16 [ffff89240e1a3c08] mlx5e_get_link_ksettings at ffffffffc049ab36 [mlx5_core] #17 [ffff89240e1a3ce8] __ethtool_get_link_ksettings at ffffffff8f25db46 #18 [ffff89240e1a3d48] speed_show at ffffffff8f277208 #19 [ffff89240e1a3dd8] dev_attr_show at ffffffff8f0b70e3 #20 [ffff89240e1a3df8] sysfs_kf_seq_show at ffffffff8eedbedf #21 [ffff89240e1a3e18] kernfs_seq_show at ffffffff8eeda596 #22 [ffff89240e1a3e28] seq_read at ffffffff8ee76d10 #23 [ffff89240e1a3e98] kernfs_fop_read at ffffffff8eedaef5 #24 [ffff89240e1a3ed8] vfs_read at ffffffff8ee4e3ff #25 [ffff89240e1a3f08] sys_read at ffffffff8ee4f27f #26 [ffff89240e1a3f50] system_call_fastpath at ffffffff8f395f92 crash> net_device.state ffff89443b0c0000 state = 0x5 (__LINK_STATE_START| __LINK_STATE_NOCARRIER) To prevent this scenario, we also make sure that the netdevice is present. En el kernel de Linux, se resolvió la siguiente vulnerabilidad: net-sysfs: agregue verificación para que netdevice esté presente en speed_show Al desactivar el netdevice o apagar el sistema, se puede desencadenar un pánico al acceder a la ruta sysfs porque el dispositivo ya está eliminado. [ 755.549084] mlx5_core 0000:12:00.1: Se llamó al apagado [ 756.404455] mlx5_core 0000:12:00.0: Se llamó al apagado... [ 757.937260] ERROR: no se puede manejar la desreferencia del puntero NULL del kernel en (nulo) [ 758.031397] IP: [] dma_pool_alloc+0x1ab/0x280 crash> bt... PID: 12649 TAREA: ffff8924108f2100 CPU: 1 COMANDO: "amsd"... #9 [ffff89240e1a38b0] page_fault en ffffffff8f38c778 [excepción RIP: pool_alloc+0x1ab] RIP : ffffffff8ee11acb RSP: ffff89240e1a3968 RFLAGS: 00010046 RAX: 0000000000000246 RBX: ffff89243d874100 RCX: 0000000000001000 RDX: 00000000000000000 RSI: 0000000000000246 RDI: ffff89243d874090 RBP: ffff89240e1a39c0 R8: 000000000001f080 R9: ffff8905ffc03c00 R10: ffffffffc04680d4 R11: d R12: 00000000000080d0 R13: ffff89243d874090 R14: ffff89243d874080 R15: 0000000000000000 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #10 [ffff89240e1a39c8] mlx5_alloc_cmd_msg en ffffffffc04680f3 [mlx5_core] #11 [ffff89240e1a3a18] d_exec en ffffffffc046ad62 [mlx5_core] #12 [ffff89240e1a3ab8] mlx5_cmd_exec en ffffffffc046b4fb [mlx5_core] #13 [ffff89240e1a3ae8] mlx5_core_access_reg en ffffffffc0475434 [mlx5_core] #14 [ffff89240e1a3b40] mlx5e_get_fec_caps en ffffffffc04a7348 [mlx5_core] #15 [ffff89240e1a3bb0] get_fec_supported_advertised en ffffffffc04992bf [mlx5_core] #16 [ffff89240e1a3c08] mlx5e_get_link_ksettings en ffffffffc049ab36 [mlx5_core] #17 [ffff89240e1a3ce8] __ethtool_get_link_ksettings en ffffffff8f25db46 #18 [ ffff89240e1a3d48] speed_show en ffffffff8f277208 #19 [ffff89240e1a3dd8] dev_attr_show en ffffffff8f0b70e3 #20 [ffff89240e1a3df8] sysfs_kf_seq_show en ffffffff8eedbedf #21 40e1a3e18] kernfs_seq_show en ffffffff8eeda596 #22 [ffff89240e1a3e28] seq_read en ffffffff8ee76d10 #23 [ffff89240e1a3e98] kernfs_fop_read en ffffffff8eedaef5 #24 8] vfs_read en ffffffff8ee4e3ff #25 [ffff89240e1a3f08] sys_read en ffffffff8ee4f27f #26 [ffff89240e1a3f50] system_call_fastpath en ffffffff8f395f92 crash> net_device.state ffff89443b0c0000 estado = 0x5 LINK_STATE_START| __LINK_STATE_NOCARRIER) Para evitar este escenario, también nos aseguramos de que el netdevice esté presente. • https://git.kernel.org/stable/c/a7b9ab04c5932dee7ec95e0abc58b0df350c0dd2 https://git.kernel.org/stable/c/081369ad088a76429984483b8a5f7e967a125aad https://git.kernel.org/stable/c/75fc8363227a999e8f3d17e2eb28dce5600dcd3f https://git.kernel.org/stable/c/8879b5313e9fa5e0c6d6812a0d25d83aed0110e2 https://git.kernel.org/stable/c/d15c9f6e3335002fea1c33bc8f71a705fa96976c https://git.kernel.org/stable/c/8d5e69d8fbf3a35ab4fbe56b8f092802b43f3ef6 https://git.kernel.org/stable/c/3a79f380b3e10edf6caa9aac90163a5d7a282204 https://git.kernel.org/stable/c/4224cfd7fb6523f7a9d1c8bb91bb5df1e • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2022-48849 – drm/amdgpu: bypass tiling flag check in virtual display case (v2)
https://notcve.org/view.php?id=CVE-2022-48849
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: bypass tiling flag check in virtual display case (v2) vkms leverages common amdgpu framebuffer creation, and also as it does not support FB modifier, there is no need to check tiling flags when initing framebuffer when virtual display is enabled. This can fix below calltrace: amdgpu 0000:00:08.0: GFX9+ requires FB check based on format modifier WARNING: CPU: 0 PID: 1023 at drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:1150 amdgpu_display_framebuffer_init+0x8e7/0xb40 [amdgpu] v2: check adev->enable_virtual_display instead as vkms can be enabled in bare metal as well. En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amdgpu: omite la verificación del indicador de mosaico en la vitrina virtual (v2) vkms aprovecha la creación de framebuffer amdgpu común y, además, como no admite el modificador FB, no es necesario verificar los indicadores de mosaico al iniciar framebuffer cuando la visualización virtual está habilitada. Esto se puede solucionar a continuación: amdgpu 0000:00:08.0: GFX9+ requiere verificación de FB según el modificador de formato ADVERTENCIA: CPU: 0 PID: 1023 en drivers/gpu/drm/amd/amdgpu/amdgpu_display.c:1150 amdgpu_display_framebuffer_init+0x8e7/0xb40 [amdgpu] v2: marque adev->enable_virtual_display en su lugar, ya que vkms también se puede habilitar en bare metal. • https://git.kernel.org/stable/c/fcd1d79aa943fff4fbaa0cce1d576995a7960699 https://git.kernel.org/stable/c/cb29021be49858059138f75d6311a7c35a9379b2 https://git.kernel.org/stable/c/e2b993302f40c4eb714ecf896dd9e1c5be7d4cd7 •
CVSS: 7.8EPSS: 0%CPEs: 2EXPL: 0CVE-2022-48848 – tracing/osnoise: Do not unregister events twice
https://notcve.org/view.php?id=CVE-2022-48848
In the Linux kernel, the following vulnerability has been resolved: tracing/osnoise: Do not unregister events twice Nicolas reported that using: # trace-cmd record -e all -M 10 -p osnoise --poll Resulted in the following kernel warning: ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1217 at kernel/tracepoint.c:404 tracepoint_probe_unregister+0x280/0x370 [...] CPU: 0 PID: 1217 Comm: trace-cmd Not tainted 5.17.0-rc6-next-20220307-nico+ #19 RIP: 0010:tracepoint_probe_unregister+0x280/0x370 [...] CR2: 00007ff919b29497 CR3: 0000000109da4005 CR4: 0000000000170ef0 Call Trace: <TASK> osnoise_workload_stop+0x36/0x90 tracing_set_tracer+0x108/0x260 tracing_set_trace_write+0x94/0xd0 ? __check_object_size.part.0+0x10a/0x150 ? selinux_file_permission+0x104/0x150 vfs_write+0xb5/0x290 ksys_write+0x5f/0xe0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7ff919a18127 [...] ---[ end trace 0000000000000000 ]--- The warning complains about an attempt to unregister an unregistered tracepoint. This happens on trace-cmd because it first stops tracing, and then switches the tracer to nop. Which is equivalent to: # cd /sys/kernel/tracing/ # echo osnoise > current_tracer # echo 0 > tracing_on # echo nop > current_tracer The osnoise tracer stops the workload when no trace instance is actually collecting data. This can be caused both by disabling tracing or disabling the tracer itself. To avoid unregistering events twice, use the existing trace_osnoise_callback_enabled variable to check if the events (and the workload) are actually active before trying to deactivate them. • https://git.kernel.org/stable/c/2fac8d6486d5c34e2ec7028580142b8209da3f92 https://git.kernel.org/stable/c/4e10787d18379d9b296290c2288097feddef16d4 https://git.kernel.org/stable/c/f0cfe17bcc1dd2f0872966b554a148e888833ee9 •