BUG: unable to handle page fault for address: ffffffffff600000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 6212067 P4D 6212067 PUD 6214067 PMD 6216067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 168 Comm: syslogd Not tainted 6.1.68-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 RIP: 0010:strncpy_from_kernel_nofault+0x92/0x1e0 mm/maccess.c:91 Code: d0 48 c1 e8 03 48 89 45 c0 42 0f b6 04 30 84 c0 48 89 55 c8 0f 85 eb 00 00 00 ff 02 45 31 e4 48 8b 55 d0 4c 8b 7d b8 49 89 dd <42> 8a 1c 23 4a 8d 3c 22 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 RSP: 0018:ffffc90000907698 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffff600000 RCX: ffff88810d3ca180 RDX: ffffc90000907720 RSI: ffffffffff600000 RDI: ffffffffff600000 RBP: ffffc900009076e0 R08: ffffffff8138c7ed R09: ffffed1021a776b3 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffffffffff600000 R14: dffffc0000000000 R15: 0000000000000005 FS: 00007f516b984380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 000000010f312000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_probe_read_kernel_str_common kernel/trace/bpf_trace.c:265 [inline] ____bpf_probe_read_kernel_str kernel/trace/bpf_trace.c:274 [inline] bpf_probe_read_kernel_str+0x2a/0x70 kernel/trace/bpf_trace.c:271 bpf_prog_ef3a4661c9d1378e+0x42/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:970 [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_run2+0x133/0x290 kernel/trace/bpf_trace.c:2314 __bpf_trace_kfree+0x6f/0x90 include/trace/events/kmem.h:94 trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0xce/0xf0 mm/slab_common.c:994 skb_free_head net/core/skbuff.c:762 [inline] skb_release_data+0x616/0x840 net/core/skbuff.c:791 skb_release_all net/core/skbuff.c:856 [inline] __kfree_skb net/core/skbuff.c:870 [inline] consume_skb+0xac/0x250 net/core/skbuff.c:1035 skb_free_datagram+0x15/0x20 net/core/datagram.c:322 __unix_dgram_recvmsg+0xcce/0x12b0 net/unix/af_unix.c:2530 unix_dgram_recvmsg+0xb7/0xd0 net/unix/af_unix.c:2547 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg net/socket.c:1035 [inline] sock_read_iter+0x3b2/0x4b0 net/socket.c:1108 call_read_iter include/linux/fs.h:2242 [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: 0033:0x7f516bad8b6a Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffcf501b648 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f516bad8b6a RDX: 00000000000000ff RSI: 000055fd00cd9300 RDI: 0000000000000000 RBP: 000055fd00cd92c0 R08: 0000000000000001 R09: 0000000000000000 R10: 00007f516bc773a3 R11: 0000000000000246 R12: 000055fd00cd93ff R13: 000055fd00cd9300 R14: 0000000000000000 R15: 00007f516bcb5a80 Modules linked in: CR2: ffffffffff600000 ---[ end trace 0000000000000000 ]--- RIP: 0010:strncpy_from_kernel_nofault+0x92/0x1e0 mm/maccess.c:91 Code: d0 48 c1 e8 03 48 89 45 c0 42 0f b6 04 30 84 c0 48 89 55 c8 0f 85 eb 00 00 00 ff 02 45 31 e4 48 8b 55 d0 4c 8b 7d b8 49 89 dd <42> 8a 1c 23 4a 8d 3c 22 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 RSP: 0018:ffffc90000907698 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffffff600000 RCX: ffff88810d3ca180 RDX: ffffc90000907720 RSI: ffffffffff600000 RDI: ffffffffff600000 RBP: ffffc900009076e0 R08: ffffffff8138c7ed R09: ffffed1021a776b3 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000 R13: ffffffffff600000 R14: dffffc0000000000 R15: 0000000000000005 FS: 00007f516b984380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600000 CR3: 000000010f312000 CR4: 00000000003506b0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: d0 48 c1 rorb -0x3f(%rax) 3: e8 03 48 89 45 call 0x4589480b 8: c0 42 0f b6 rolb $0xb6,0xf(%rdx) c: 04 30 add $0x30,%al e: 84 c0 test %al,%al 10: 48 89 55 c8 mov %rdx,-0x38(%rbp) 14: 0f 85 eb 00 00 00 jne 0x105 1a: ff 02 incl (%rdx) 1c: 45 31 e4 xor %r12d,%r12d 1f: 48 8b 55 d0 mov -0x30(%rbp),%rdx 23: 4c 8b 7d b8 mov -0x48(%rbp),%r15 27: 49 89 dd mov %rbx,%r13 * 2a: 42 8a 1c 23 mov (%rbx,%r12,1),%bl <-- trapping instruction 2e: 4a 8d 3c 22 lea (%rdx,%r12,1),%rdi 32: 48 89 f8 mov %rdi,%rax 35: 48 c1 e8 03 shr $0x3,%rax 39: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 3e: 84 c0 test %al,%al