Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5928 Comm: syz-executor Not tainted 6.14.0-rc6-syzkaller-00003-g4d872d51bc9d #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:____bpf_get_local_storage kernel/bpf/cgroup.c:1587 [inline] RIP: 0010:bpf_get_local_storage+0x17b/0x260 kernel/bpf/cgroup.c:1569 Code: 48 8d 7b 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bb 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 10 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 a6 00 00 00 48 8b 1b e8 13 90 73 09 83 f8 07 89 RSP: 0018:ffffc90000007628 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81e40b82 RDX: 0000000000000000 RSI: ffffffff81e40c38 RDI: ffff888030e00f20 RBP: ffffc90000007648 R08: 0000000000000005 R09: 0000000000000015 R10: 0000000000000015 R11: 0000000000000005 R12: ffff88802fa977f0 R13: ffffc900071c3002 R14: 0000000000000000 R15: ffff88802fa97820 FS: 000055555cc6f500(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc4b450e40 CR3: 000000002453a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> bpf_prog_3647604f6c8667e9+0x2e/0x41 bpf_dispatcher_nop_func include/linux/bpf.h:1290 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_prog_run_save_cb+0x11f/0x330 include/linux/filter.h:938 bpf_prog_run_array_cg kernel/bpf/cgroup.c:68 [inline] __cgroup_bpf_run_filter_skb+0x470/0xe60 kernel/bpf/cgroup.c:1425 sk_filter_trim_cap+0x234/0xac0 net/core/filter.c:147 tcp_filter net/ipv4/tcp_ipv4.c:2144 [inline] tcp_v4_rcv+0x28fd/0x4380 net/ipv4/tcp_ipv4.c:2332 ip_protocol_deliver_rcu+0xba/0x4c0 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x316/0x570 net/ipv4/ip_input.c:233 NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_local_deliver+0x18e/0x1f0 net/ipv4/ip_input.c:254 dst_input include/net/dst.h:469 [inline] ip_rcv_finish net/ipv4/ip_input.c:447 [inline] NF_HOOK include/linux/netfilter.h:314 [inline] NF_HOOK include/linux/netfilter.h:308 [inline] ip_rcv+0x2c3/0x5d0 net/ipv4/ip_input.c:567 __netif_receive_skb_one_core+0x199/0x1e0 net/core/dev.c:5893 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6006 process_backlog+0x443/0x15f0 net/core/dev.c:6354 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7188 napi_poll net/core/dev.c:7257 [inline] net_rx_action+0xa94/0x1010 net/core/dev.c:7379 handle_softirqs+0x213/0x8f0 kernel/softirq.c:561 do_softirq kernel/softirq.c:462 [inline] do_softirq+0xb2/0xf0 kernel/softirq.c:449 </IRQ> <TASK> __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:389 local_bh_enable include/linux/bottom_half.h:33 [inline] rcu_read_unlock_bh include/linux/rcupdate.h:919 [inline] __dev_queue_xmit+0x8b0/0x43e0 net/core/dev.c:4676 dev_queue_xmit include/linux/netdevice.h:3313 [inline] neigh_hh_output include/net/neighbour.h:523 [inline] neigh_output include/net/neighbour.h:537 [inline] ip_finish_output2+0xc34/0x2180 net/ipv4/ip_output.c:236 __ip_finish_output net/ipv4/ip_output.c:314 [inline] __ip_finish_output+0x49e/0x950 net/ipv4/ip_output.c:296 ip_finish_output+0x35/0x380 net/ipv4/ip_output.c:324 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:434 dst_output include/net/dst.h:459 [inline] ip_local_out net/ipv4/ip_output.c:130 [inline] __ip_queue_xmit+0x1a8d/0x22d0 net/ipv4/ip_output.c:528 __tcp_transmit_skb+0x2b39/0x3ec0 net/ipv4/tcp_output.c:1471 tcp_transmit_skb net/ipv4/tcp_output.c:1489 [inline] tcp_write_xmit+0x12b1/0x8560 net/ipv4/tcp_output.c:2832 __tcp_push_pending_frames+0xaf/0x390 net/ipv4/tcp_output.c:3015 tcp_push+0x221/0x6f0 net/ipv4/tcp.c:751 tcp_sendmsg_locked+0x290f/0x37c0 net/ipv4/tcp.c:1326 tcp_sendmsg+0x2e/0x50 net/ipv4/tcp.c:1358 inet_sendmsg+0xb9/0x140 net/ipv4/af_inet.c:851 sock_sendmsg_nosec net/socket.c:718 [inline] __sock_sendmsg net/socket.c:733 [inline] sock_write_iter+0x4ac/0x5b0 net/socket.c:1137 new_sync_write fs/read_write.c:586 [inline] vfs_write+0x5ae/0x1150 fs/read_write.c:679 ksys_write+0x207/0x250 fs/read_write.c:731 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f3d12f8bbe0 Code: 40 00 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 80 3d 61 19 1f 00 00 74 17 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 58 c3 0f 1f 80 00 00 00 00 48 83 ec 28 48 89 RSP: 002b:00007ffca4d15388 EFLAGS: 00000202 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000444e9280 RCX: 00007f3d12f8bbe0 RDX: 0000000000002090 RSI: 00007f3d0fffdf70 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000007 R09: 00000000003ffde8 R10: f430ebcf1bacd9f2 R11: 0000000000000202 R12: 0000000000002090 R13: 000055555cc91770 R14: 00007ffca4d15850 R15: 00007f3d0fffdf70 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:____bpf_get_local_storage kernel/bpf/cgroup.c:1587 [inline] RIP: 0010:bpf_get_local_storage+0x17b/0x260 kernel/bpf/cgroup.c:1569 Code: 48 8d 7b 10 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 bb 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 8b 5b 10 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 a6 00 00 00 48 8b 1b e8 13 90 73 09 83 f8 07 89 RSP: 0018:ffffc90000007628 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffffff81e40b82 RDX: 0000000000000000 RSI: ffffffff81e40c38 RDI: ffff888030e00f20 RBP: ffffc90000007648 R08: 0000000000000005 R09: 0000000000000015 R10: 0000000000000015 R11: 0000000000000005 R12: ffff88802fa977f0 R13: ffffc900071c3002 R14: 0000000000000000 R15: ffff88802fa97820 FS: 000055555cc6f500(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc4b450e40 CR3: 000000002453a000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 8d 7b 10 lea 0x10(%rbx),%rdi 4: 48 89 fa mov %rdi,%rdx 7: 48 c1 ea 03 shr $0x3,%rdx b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) f: 0f 85 bb 00 00 00 jne 0xd0 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 48 8b 5b 10 mov 0x10(%rbx),%rbx 23: 48 89 da mov %rbx,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 0f 85 a6 00 00 00 jne 0xda 34: 48 8b 1b mov (%rbx),%rbx 37: e8 13 90 73 09 call 0x973904f 3c: 83 f8 07 cmp $0x7,%eax 3f: 89 .byte 0x89