BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 6c12067 P4D 6c12067 PUD 6c14067 PMD 6c16067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 451 Comm: syz-fuzzer Tainted: G W 6.1.75-syzkaller-00064-g3dfddcb9c277 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:copy_from_kernel_nofault+0x86/0x2d0 mm/maccess.c:36 Code: 48 89 55 d0 0f 85 de 01 00 00 ff 02 bf 07 00 00 00 4c 89 ee e8 bb 3a d2 ff 49 83 fd 07 76 58 4d 89 fe 49 83 c7 08 49 83 c5 f8 <49> 8b 1c 24 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 RSP: 0018:ffffc900094068f0 EFLAGS: 00010257 RAX: 0000000000000000 RBX: 00007ffffffff000 RCX: ffff88810e6f0000 RDX: ffff88810e6f0ba0 RSI: 0000000000000008 RDI: 0000000000000007 RBP: ffffc90009406928 R08: ffffffff81a337d5 R09: ffffed1021cde001 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffffff600000 R13: 0000000000000000 R14: ffffc90009406988 R15: ffffc90009406990 FS: 000000c001025090(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 0000000121ea0000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_probe_read_kernel_common kernel/trace/bpf_trace.c:230 [inline] ____bpf_probe_read_compat kernel/trace/bpf_trace.c:294 [inline] bpf_probe_read_compat+0x112/0x180 kernel/trace/bpf_trace.c:287 bpf_prog_baa065642a502c00+0x64/0x68 bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline] __bpf_prog_run include/linux/filter.h:600 [inline] bpf_prog_run include/linux/filter.h:607 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2275 [inline] bpf_trace_run3+0x177/0x2e0 kernel/trace/bpf_trace.c:2315 __bpf_trace_kmem_cache_free+0x99/0xc0 include/trace/events/kmem.h:114 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x4e7/0x510 mm/slub.c:3705 kfree_skbmem+0x104/0x170 __kfree_skb net/core/skbuff.c:871 [inline] consume_skb+0xb4/0x250 net/core/skbuff.c:1035 packet_rcv+0x163/0x13e0 net/packet/af_packet.c:2233 dev_queue_xmit_nit+0x9f8/0xa90 net/core/dev.c:2329 xmit_one net/core/dev.c:3630 [inline] dev_hard_start_xmit+0x140/0x630 net/core/dev.c:3650 sch_direct_xmit+0x298/0x9b0 net/sched/sch_generic.c:342 __dev_xmit_skb net/core/dev.c:3861 [inline] __dev_queue_xmit+0x17c2/0x36e0 net/core/dev.c:4266 dev_queue_xmit include/linux/netdevice.h:3076 [inline] neigh_hh_output include/net/neighbour.h:536 [inline] neigh_output include/net/neighbour.h:550 [inline] ip_finish_output2+0xb34/0xf60 net/ipv4/ip_output.c:228 __ip_finish_output+0x162/0x370 ip_finish_output+0x31/0x2a0 net/ipv4/ip_output.c:316 NF_HOOK_COND include/linux/netfilter.h:294 [inline] ip_output+0x1d6/0x420 net/ipv4/ip_output.c:430 dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0x10b0/0x1af0 net/ipv4/ip_output.c:532 ip_queue_xmit+0x4c/0x70 net/ipv4/ip_output.c:546 __tcp_transmit_skb+0x1e9e/0x35a0 net/ipv4/tcp_output.c:1401 __tcp_send_ack+0x2e4/0x6c0 net/ipv4/tcp_output.c:4004 tcp_send_ack+0x3b/0x60 net/ipv4/tcp_output.c:4010 __tcp_cleanup_rbuf+0x1ee/0x480 net/ipv4/tcp.c:1620 tcp_cleanup_rbuf net/ipv4/tcp.c:1631 [inline] tcp_recvmsg_locked+0x1c07/0x24c0 net/ipv4/tcp.c:2637 tcp_recvmsg+0x258/0x920 net/ipv4/tcp.c:2667 inet_recvmsg+0x14e/0x500 net/ipv4/af_inet.c:864 sock_recvmsg_nosec net/socket.c:1020 [inline] sock_recvmsg net/socket.c:1038 [inline] sock_read_iter+0x3b2/0x4b0 net/socket.c:1111 call_read_iter include/linux/fs.h:2252 [inline] new_sync_read fs/read_write.c:389 [inline] vfs_read+0x771/0xad0 fs/read_write.c:470 ksys_read+0x199/0x2c0 fs/read_write.c:613 __do_sys_read fs/read_write.c:623 [inline] __se_sys_read fs/read_write.c:621 [inline] __x64_sys_read+0x7b/0x90 fs/read_write.c:621 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x40720e Code: 48 83 ec 38 e8 13 00 00 00 48 83 c4 38 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48 RSP: 002b:000000c000877890 EFLAGS: 00000212 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000040720e RDX: 0000000000001000 RSI: 000000c000818000 RDI: 0000000000000003 RBP: 000000c0008778d0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000212 R12: 000000c001071e10 R13: 0000000000001af4 R14: 000000c000007520 R15: 00000000000000e3 Modules linked in: CR2: ffffffffff600000 ---[ end trace 0000000000000000 ]--- RIP: 0010:copy_from_kernel_nofault+0x86/0x2d0 mm/maccess.c:36 Code: 48 89 55 d0 0f 85 de 01 00 00 ff 02 bf 07 00 00 00 4c 89 ee e8 bb 3a d2 ff 49 83 fd 07 76 58 4d 89 fe 49 83 c7 08 49 83 c5 f8 <49> 8b 1c 24 4c 89 f0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 80 RSP: 0018:ffffc900094068f0 EFLAGS: 00010257 RAX: 0000000000000000 RBX: 00007ffffffff000 RCX: ffff88810e6f0000 RDX: ffff88810e6f0ba0 RSI: 0000000000000008 RDI: 0000000000000007 RBP: ffffc90009406928 R08: ffffffff81a337d5 R09: ffffed1021cde001 R10: 0000000000000000 R11: dffffc0000000001 R12: ffffffffff600000 R13: 0000000000000000 R14: ffffc90009406988 R15: ffffc90009406990 FS: 000000c001025090(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 0000000121ea0000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 89 55 d0 mov %rdx,-0x30(%rbp) 4: 0f 85 de 01 00 00 jne 0x1e8 a: ff 02 incl (%rdx) c: bf 07 00 00 00 mov $0x7,%edi 11: 4c 89 ee mov %r13,%rsi 14: e8 bb 3a d2 ff call 0xffd23ad4 19: 49 83 fd 07 cmp $0x7,%r13 1d: 76 58 jbe 0x77 1f: 4d 89 fe mov %r15,%r14 22: 49 83 c7 08 add $0x8,%r15 26: 49 83 c5 f8 add $0xfffffffffffffff8,%r13 * 2a: 49 8b 1c 24 mov (%r12),%rbx <-- trapping instruction 2e: 4c 89 f0 mov %r14,%rax 31: 48 c1 e8 03 shr $0x3,%rax 35: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 3c: fc ff df 3f: 80 .byte 0x80