Additional info:
reporter:       libreport-2.9.5
kernel BUG at mm/slub.c:296!
invalid opcode: 0000 [#1] SMP NOPTI
Modules linked in: fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun nf_conntrack_netbios_ns nf_conntrack_broadcast xt_CT ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack devlink ip_set nfnetlink ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack libcrc32c iptable_mangle iptable_raw iptable_security ebtable_filter ebtables ip6table_filter ip6_tables sunrpc vfat fat eeepc_wmi asus_wmi edac_mce_amd sparse_keymap rfkill kvm_amd video wmi_bmof mxm_wmi kvm snd_hda_codec_realtek irqbypass crct10dif_pclmul crc32_pclmul snd_hda_codec_generic ghash_clmulni_intel snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hda_core
 joydev snd_hwdep snd_seq snd_seq_device snd_pcm ccp snd_timer snd sp5100_tco soundcore k10temp i2c_piix4 shpchp gpio_amdpt pinctrl_amd gpio_generic wmi pcc_cpufreq acpi_cpufreq amdkfd amd_iommu_v2 amdgpu chash gpu_sched drm_kms_helper ttm drm igb crc32c_intel dca i2c_algo_bit
CPU: 1 PID: 2027 Comm: Xorg Not tainted 4.17.14-202.fc28.x86_64 #1
Hardware name: System manufacturer System Product Name/ROG STRIX X470-F GAMING, BIOS 4018 07/12/2018
RIP: 0010:__slab_free+0x16a/0x2e0
RSP: 0018:ffffafe38910fa60 EFLAGS: 00010246
RAX: ffff9f8036ea0400 RBX: ffff9f8036ea0400 RCX: 0000000180200012
RDX: ffff9f8036ea0400 RSI: ffffe4f69fdba800 RDI: ffff9f805e806e80
RBP: ffffafe38910faf8 R08: 0000000000000001 R09: ffffffffc05a5e78
R10: ffffe4f69fdba800 R11: 0000000000000780 R12: ffff9f805e806e80
R13: ffffe4f69fdba800 R14: ffff9f8036ea0400 R15: ffff9f802f015000
FS:  00007fab59ee5ac0(0000) GS:ffff9f805ec40000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0ca8002158 CR3: 00000007de72a000 CR4: 00000000003406e0
Call Trace:
 dc_stream_release+0x28/0x50 [amdgpu]
 dm_update_crtcs_state+0x1be/0x4d0 [amdgpu]
 amdgpu_dm_atomic_check+0x1b1/0x3b0 [amdgpu]
 drm_atomic_check_only+0x360/0x4f0 [drm]
 ? __drm_atomic_helper_crtc_duplicate_state+0x85/0xb0 [drm_kms_helper]
 drm_atomic_commit+0x13/0x50 [drm]
 drm_atomic_helper_legacy_gamma_set+0x136/0x160 [drm_kms_helper]
 drm_mode_gamma_set_ioctl+0x184/0x1e0 [drm]
 ? drm_mode_crtc_set_gamma_size+0xa0/0xa0 [drm]
 drm_ioctl_kernel+0x5b/0xb0 [drm]
 drm_ioctl+0x1b3/0x370 [drm]
 ? drm_mode_crtc_set_gamma_size+0xa0/0xa0 [drm]
 ? do_iter_write+0xdc/0x190
 amdgpu_drm_ioctl+0x49/0x80 [amdgpu]
 do_vfs_ioctl+0xa4/0x610
 ksys_ioctl+0x60/0x90
 __x64_sys_ioctl+0x16/0x20
 do_syscall_64+0x5b/0x160
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fab5715dec7
RSP: 002b:00007fffa5389ff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000028dbf90 RCX: 00007fab5715dec7
RDX: 00007fffa538a030 RSI: 00000000c02064a5 RDI: 000000000000000c
RBP: 00007fffa538a030 R08: 00000000028dc650 R09: 00000000028dc850
R10: 00000000028dc650 R11: 0000000000000246 R12: 00000000c02064a5
R13: 000000000000000c R14: 00000000028d6740 R15: 000000000278fb00
Code: ff ff 84 c0 0f 84 f1 fe ff ff 44 0f b6 7c 24 1f 80 7c 24 4b 00 79 05 45 84 ff 74 7a 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 <0f> 0b e8 2f fc ff ff 85 c0 0f 85 c1 fe ff ff 48 8d 65 d8 5b 41 
RIP: __slab_free+0x16a/0x2e0 RSP: ffffafe38910fa60