CVE-2024-26941

In the Linux kernel, the following vulnerability has been resolved: drm/dp:
Fix divide-by-zero regression on DP MST unplug with nouveau Fix a
regression when using nouveau and unplugging a StarTech MSTDP122DP
DisplayPort 1.2 MST hub (the same regression does not appear when using a
Cable Matters DisplayPort 1.4 MST hub). Trace: divide error: 0000 [#1]
PREEMPT SMP PTI CPU: 7 PID: 2962 Comm: Xorg Not tainted 6.8.0-rc3+ #744
Hardware name: Razer Blade/DANA_MB, BIOS 01.01 08/31/2018 RIP:
0010:drm_dp_bw_overhead+0xb4/0x110 [drm_display_helper] Code: c6 b8 01 00
00 00 75 61 01 c6 41 0f af f3 41 0f af f1 c1 e1 04 48 63 c7 31 d2 89 ff 48
8b 5d f8 c9 48 0f af f1 48 8d 44 06 ff <48> f7 f7 31 d2 31 c9 31 f6 31 ff
45 31 c0 45 31 c9 45 31 d2 45 31 RSP: 0018:ffffb2c5c211fa30 EFLAGS:
00010206 RAX: ffffffffffffffff RBX: 0000000000000000 RCX: 0000000000f59b00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP:
ffffb2c5c211fa48 R08: 0000000000000001 R09: 0000000000000020 R10:
0000000000000004 R11: 0000000000000000 R12: 0000000000023b4a R13:
ffff91d37d165800 R14: ffff91d36fac6d80 R15: ffff91d34a764010 FS:
00007f4a1ca3fa80(0000) GS:ffff91d6edbc0000(0000) knlGS:0000000000000000 CS:
0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559491d49000 CR3:
000000011d180002 CR4: 00000000003706f0 Call Trace: <TASK> ?
show_regs+0x6d/0x80 ? die+0x37/0xa0 ? do_trap+0xd4/0xf0 ?
do_error_trap+0x71/0xb0 ? drm_dp_bw_overhead+0xb4/0x110
[drm_display_helper] ? exc_divide_error+0x3a/0x70 ?
drm_dp_bw_overhead+0xb4/0x110 [drm_display_helper] ?
asm_exc_divide_error+0x1b/0x20 ? drm_dp_bw_overhead+0xb4/0x110
[drm_display_helper] ? drm_dp_calc_pbn_mode+0x2e/0x70 [drm_display_helper]
nv50_msto_atomic_check+0xda/0x120 [nouveau]
drm_atomic_helper_check_modeset+0xa87/0xdf0 [drm_kms_helper]
drm_atomic_helper_check+0x19/0xa0 [drm_kms_helper]
nv50_disp_atomic_check+0x13f/0x2f0 [nouveau]
drm_atomic_check_only+0x668/0xb20 [drm] ?
drm_connector_list_iter_next+0x86/0xc0 [drm] drm_atomic_commit+0x58/0xd0
[drm] ? __pfx___drm_printfn_info+0x10/0x10 [drm]
drm_atomic_connector_commit_dpms+0xd7/0x100 [drm]
drm_mode_obj_set_property_ioctl+0x1c5/0x450 [drm] ?
__pfx_drm_connector_property_set_ioctl+0x10/0x10 [drm]
drm_connector_property_set_ioctl+0x3b/0x60 [drm]
drm_ioctl_kernel+0xb9/0x120 [drm] drm_ioctl+0x2d0/0x550 [drm] ?
__pfx_drm_connector_property_set_ioctl+0x10/0x10 [drm]
nouveau_drm_ioctl+0x61/0xc0 [nouveau] _x64_sys_ioctl+0xa0/0xf0
do_syscall_64+0x76/0x140 ? do_syscall_64+0x85/0x140 ?
do_syscall_64+0x85/0x140 entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP:
0033:0x7f4a1cd1a94f Code: 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 <41> 89 c0 3d 00 f0 ff ff 77 1f 48 8b 44 24 18 64 48 2b 04 25 28 00 RSP:
002b:00007ffd2f1df520 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX:
ffffffffffffffda RBX: 00007ffd2f1df5b0 RCX: 00007f4a1cd1a94f RDX:
00007ffd2f1df5b0 RSI: 00000000c01064ab RDI: 000000000000000f RBP:
00000000c01064ab R08: 000056347932deb8 R09: 000056347a7d99c0 R10:
0000000000000000 R11: 0000000000000246 R12: 000056347938a220 R13:
000000000000000f R14: 0000563479d9f3f0 R15: 0000000000000000 </TASK>
Modules linked in: rfcomm xt_conntrack nft_chain_nat xt_MASQUERADE nf_nat
nf_conntrack_netlink nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xfrm_user
xfrm_algo xt_addrtype nft_compat nf_tables nfnetlink br_netfilter bridge
stp llc ccm cmac algif_hash overlay algif_skcipher af_alg bnep binfmt_misc
snd_sof_pci_intel_cnl snd_sof_intel_hda_common snd_soc_hdac_hda snd_sof_pci
snd_sof_xtensa_dsp snd_sof_intel_hda snd_sof snd_sof_utils
snd_soc_acpi_intel_match snd_soc_acpi snd_soc_core snd_compress
snd_sof_intel_hda_mlink snd_hda_ext_core iwlmvm intel_rapl_msr
intel_rapl_common intel_tcc_cooling x86_pkg_temp_thermal intel_powerclamp
mac80211 coretemp kvm_intel snd_hda_codec_hdmi kvm snd_hda —truncated—