Vulnerabilidad en kernel de Linux (CVE-2024-26700)

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/amd/display: corrige MST Null Ptr para RV. El cambio intenta corregir el siguiente error específico de la plataforma RV: ERROR: desreferencia del puntero NULL del kernel, dirección: 0000000000000008 PGD 0 P4D 0 Ups: 0000 [#1] PREEMPT SMP NOPTI CPU: 4 PID: 917 Comm: sway No contaminado 6.3.9-arch1-1 #1 124dc55df4f5272ccb409f39ef4872fc2b3376a2 Nombre de hardware: LENOVO 20NKS01Y00/20NKS01Y00, BIOS R1 2ET61W (1.31) 28/07/2022 QEPD : 0010:drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper] Código: 01 00 00 48 8b 85 60 05 00 00 48 63 80 88 00 00 00 3b 43 28 0f 8d 2e 01 00 0 0 48 8b 53 30 48 8d 04 80 48 8d 04 c2 48 8b 40 18 <48> 8> RSP: 0018:ffff960cc2df77d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8afb87e81280 RCX: 0000000000000224 RDX: ffff8af b9ee37c00 RSI: ffff8afb8da1a578 RDI: ffff8afb87e81280 RBP: ffff8afb83d67000 R08: 00000000000000001 R09: ffff8afb9652f850 R10: ffff960cc2df7908 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8afb8d7688a0 R14: ffff8afb8da1a578 R15: 00000000000000224 FS: 00007f4dac35ce00(0000) GS:ffff8a fe30b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000000000008 CR3: 000000010ddc6000 CR4: 00000 000003506e0 Llamar Seguimiento: ? __morir+0x23/0x70 ? page_fault_oops+0x171/0x4e0? plist_add+0xbe/0x100? exc_page_fault+0x7c/0x180? asm_exc_page_fault+0x26/0x30? drm_dp_atomic_find_time_slots+0x5e/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026]? drm_dp_atomic_find_time_slots+0x28/0x260 [drm_display_helper 0e67723696438d8e02b741593dd50d80b44c2026] compute_mst_dsc_configs_for_link+0x2ff/0xa40 [amdgpu 62e600d2a75e915 8e1cd0a243bdc8e6da040c054] ? fill_plane_buffer_attributes+0x419/0x510 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] compute_mst_dsc_configs_for_state+0x1e1/0x250 [amdgpu 62e600d2a75e9158e1cd0a243 bdc8e6da040c054] amdgpu_dm_atomic_check+0xecd/0x1190 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] drm_atomic_check_only+0x5c5/0xa40 drm_mode_atomic_ioctl+0x76e/0x bc0? _copiar_al_usuario+0x25/0x30? drm_ioctl+0x296/0x4b0? __pfx_drm_mode_atomic_ioctl+0x10/0x10 drm_ioctl_kernel+0xcd/0x170 drm_ioctl+0x26d/0x4b0 ? __pfx_drm_mode_atomic_ioctl+0x10/0x10 amdgpu_drm_ioctl+0x4e/0x90 [amdgpu 62e600d2a75e9158e1cd0a243bdc8e6da040c054] __x64_sys_ioctl+0x94/0xd0 do_syscall_ 64+0x60/0x90 ? do_syscall_64+0x6c/0x90 Entry_SYSCALL_64_after_hwframe+0x72/0xdc RIP: 0033:0x7f4dad17f76f Código: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c> RSP: 002b:00007ffd9ae859f0 EFLAGS: 00000246 ORIG_RAX: 00000000000000010 RAX: ffffffffffffffda RBX: 000055e255a5590 0 RCX: 00007f4dad17f76f RDX: 00007ffd9ae85a90 RSI: 00000000c03864bc RDI: 000000000000000b RBP: 00007ffd9ae85a90 R08: 0000000000000003 R09 : 0000000000000003 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000c03864bc R13: 0000000000000000b R14: 000055e255a7fc60 R1 5: 000055e255a01eb0 Módulos vinculados en: rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device ccm cmac algif_hash algif_skcipher af_alg joydev mousedev bnep > typec libphy k10temp ipmi_msghandler roles i2c_scmi acpi_ cpufreq mac_hid nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_mas> CR2: 0000000000000008 ---[ final de seguimiento 00000000000000000 ]--- RIP: 0010:drm_dp_atomic_find_time_slots+0x5e/0x26 0 [drm_display_helper] Código: 01 00 00 48 8b 85 60 05 00 00 48 63 80 88 00 00 00 3b 43 28 0f 8d 2e 01 00 00 48 8b 53 30 48 8d 04 80 48 8d 04 c2 48 8b 40 18 <48> 8> RSP: 0018:ffff960cc2df77d8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff8afb87e81280 RCX: 0000000000000224 RDX: ffff8afb9ee37c00 RSI: ffff8afb8da1a578 RDI: ffff8afb87e81280 RBP: ffff8afb83d67000 R08: 00000000000000001 R09: ffff8afb9652f850 R10: ffff960cc2df7908 R11: 0000000000000002 R12: 0000000000000000 R13: ffff8afb8d7688a0 ---truncado- --