Backtrace

BUG: kernel NULL pointer dereference, address: 0000000000000030
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000010505b067 P4D 800000010505b067 PUD 10bd6e067 PMD 0 
Oops: 0002 [#1] SMP PTI
CPU: 1 PID: 2408 Comm: proc Not tainted 5.11.22-100.fc32.x86_64 #1
Hardware name: LENOVO 20150/Product Name, BIOS 5ECN39WW(V3.05) 09/11/2012
RIP: 0010:memcg_slab_post_alloc_hook+0x119/0x2b0
Code: c3 d3 eb 49 8b 06 a8 03 0f 85 45 01 00 00 65 48 ff 00 e8 8a 54 e6 ff 49 8b 47 38 48 85 c0 0f 85 12 01 00 00 48 83 e0 fc 31 f6 <4c> 89 34 d8 41 8b 55 18 49 8b 07 48 83 c2 08 41 f6 45 0a 02 40 0f
RSP: 0018:ffffb045c1343e00 EFLAGS: 00010246
RAX: 0000000000000010 RBX: 0000000000000004 RCX: 0000000000000006
RDX: 0000000000000001 RSI: 0000000000000000 RDI: 0000000000000010
RBP: 0000000000000000 R08: ffffb045c1343e48 R09: ffff944a977e0200
R10: 0000000000000022 R11: ffff944acbe4b840 R12: ffffb045c1343e48
R13: ffff944b801d4a00 R14: ffff944b8616f140 R15: fffff1c3005df800
FS:  00007fb4153f0700(0000) GS:ffff944bbb240000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000030 CR3: 000000010b782004 CR4: 00000000000606e0
Call Trace:
 ? do_epoll_ctl+0x350/0xbf0
 kmem_cache_alloc+0xe7/0x1e0
 do_epoll_ctl+0x350/0xbf0
 __x64_sys_epoll_ctl+0x4d/0x70
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fb42465f1be
Code: 48 8b 0d dd 0c 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 e9 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d aa 0c 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fb4153ef418 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
RAX: ffffffffffffffda RBX: 00007fb4153ef530 RCX: 00007fb42465f1be
RDX: 0000000000000022 RSI: 0000000000000001 RDI: 0000000000000019
RBP: 00007fb4153ef4f8 R08: 0000000000000001 R09: 00007fb40c000080
R10: 00007fb4153ef420 R11: 0000000000000246 R12: 0000000000002001
R13: 0000000000000000 R14: 00007fb40c002db0 R15: 0000000001a25f60
Modules linked in: uinput ccm xt_CHECKSUM xt_MASQUERADE xt_conntrack ipt_REJECT nf_nat_tftp nf_conntrack_tftp tun bridge stp llc nft_objref nf_conntrack_netbios_ns nf_conntrack_broadcast nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat ip6table_nat ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_mangle iptable_raw iptable_security ip_set nf_tables nfnetlink ip6table_filter ip6_tables iptable_filter sunrpc vfat fat brcmsmac brcmutil b43 cordic snd_hda_codec_hdmi snd_hda_codec_conexant mac80211 snd_hda_codec_generic ledtrig_audio intel_rapl_msr snd_hda_intel intel_rapl_common snd_intel_dspcfg uvcvideo soundwire_intel x86_pkg_temp_thermal intel_powerclamp soundwire_generic_allocation snd_soc_core cfg80211 videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 coretemp videobuf2_common snd_compress videodev kvm_intel kvm ssb
 snd_pcm_dmaengine mc libarc4 irqbypass rtsx_usb_ms rapl soundwire_cadence intel_cstate memstick snd_hda_codec snd_hda_core ac97_bus snd_hwdep snd_seq snd_seq_device snd_pcm intel_uncore bcma snd_timer snd ideapad_laptop iTCO_wdt at24 soundcore intel_pmc_bxt platform_profile iTCO_vendor_support sparse_keymap pcspkr rfkill i2c_i801 i2c_smbus lpc_ich ip_tables i915 nouveau mxm_wmi wmi drm_ttm_helper rtsx_usb_sdmmc ttm mmc_core i2c_algo_bit drm_kms_helper crct10dif_pclmul crc32_pclmul crc32c_intel cec ghash_clmulni_intel drm serio_raw alx rtsx_usb mdio video fuse
CR2: 0000000000000030