BUG: unable to handle page fault for address: fffffbfffbc00000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 23ffe4067 P4D 23ffe4067 PUD 23ffe3067 PMD 0 Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 5881 Comm: syz.3.110 Not tainted 6.12.0-rc1-next-20241003-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0018:ffffc90003c974f8 EFLAGS: 00010286 RAX: 0000000000000001 RBX: 1ffffffffbc00000 RCX: ffffffff81cf410f RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffde000000 RBP: ffffffffffffffff R08: ffffffffde000003 R09: 1ffffffffbc00000 R10: dffffc0000000000 R11: fffffbfffbc00000 R12: ffffffffde000000 R13: 0000000000000004 R14: dffffc0000000001 R15: fffffbfffbc00001 FS: 00007fb40fdd26c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfffbc00000 CR3: 000000004e4a6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_read include/linux/instrumented.h:26 [inline] copy_from_kernel_nofault+0x6f/0x2f0 mm/maccess.c:35 bpf_probe_read_kernel_common include/linux/bpf.h:2960 [inline] ____bpf_probe_read_compat kernel/trace/bpf_trace.c:294 [inline] bpf_probe_read_compat+0x10f/0x180 kernel/trace/bpf_trace.c:287 bpf_prog_19cf62d422e78662+0x43/0x45 bpf_dispatcher_nop_func include/linux/bpf.h:1257 [inline] __bpf_prog_run include/linux/filter.h:701 [inline] bpf_prog_run include/linux/filter.h:708 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2318 [inline] bpf_trace_run3+0x33a/0x5a0 kernel/trace/bpf_trace.c:2360 trace_kmem_cache_free include/trace/events/kmem.h:114 [inline] kmem_cache_free+0x367/0x410 mm/slub.c:4689 skb_kfree_head net/core/skbuff.c:1084 [inline] skb_free_head net/core/skbuff.c:1098 [inline] skb_release_data+0x677/0x8a0 net/core/skbuff.c:1125 skb_release_all net/core/skbuff.c:1190 [inline] __kfree_skb net/core/skbuff.c:1204 [inline] sk_skb_reason_drop+0x1c9/0x380 net/core/skbuff.c:1242 kfree_skb_reason include/linux/skbuff.h:1262 [inline] __skb_queue_purge_reason include/linux/skbuff.h:3305 [inline] __skb_queue_purge include/linux/skbuff.h:3310 [inline] tipc_bcast_xmit+0x2ea/0x470 net/tipc/bcast.c:272 tipc_node_broadcast+0x27d/0x8b0 net/tipc/node.c:1798 tipc_nametbl_publish+0x13a/0x1e0 net/tipc/name_table.c:786 tipc_sk_publish+0x205/0x480 net/tipc/socket.c:2915 __tipc_bind net/tipc/socket.c:700 [inline] tipc_sk_bind+0x25e/0x800 net/tipc/socket.c:708 __sys_bind_socket net/socket.c:1838 [inline] __sys_bind+0x22d/0x2d0 net/socket.c:1862 __do_sys_bind net/socket.c:1870 [inline] __se_sys_bind net/socket.c:1868 [inline] __x64_sys_bind+0x7a/0x90 net/socket.c:1868 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb40ef7dff9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb40fdd2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000031 RAX: ffffffffffffffda RBX: 00007fb40f135f80 RCX: 00007fb40ef7dff9 RDX: 0000000000000010 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007fb40eff0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fb40f135f80 R15: 00007ffc46a889f8 Modules linked in: CR2: fffffbfffbc00000 ---[ end trace 0000000000000000 ]--- RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:87 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:104 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline] RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline] RIP: 0010:kasan_check_range+0x82/0x290 mm/kasan/generic.c:189 Code: 01 00 00 00 00 fc ff df 4f 8d 3c 31 4c 89 fd 4c 29 dd 48 83 fd 10 7f 29 48 85 ed 0f 84 3e 01 00 00 4c 89 cd 48 f7 d5 48 01 dd <41> 80 3b 00 0f 85 c9 01 00 00 49 ff c3 48 ff c5 75 ee e9 1e 01 00 RSP: 0018:ffffc90003c974f8 EFLAGS: 00010286 RAX: 0000000000000001 RBX: 1ffffffffbc00000 RCX: ffffffff81cf410f RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffffffde000000 RBP: ffffffffffffffff R08: ffffffffde000003 R09: 1ffffffffbc00000 R10: dffffc0000000000 R11: fffffbfffbc00000 R12: ffffffffde000000 R13: 0000000000000004 R14: dffffc0000000001 R15: fffffbfffbc00001 FS: 00007fb40fdd26c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: fffffbfffbc00000 CR3: 000000004e4a6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 7 bytes skipped: 0: df 4f 8d fisttps -0x73(%rdi) 3: 3c 31 cmp $0x31,%al 5: 4c 89 fd mov %r15,%rbp 8: 4c 29 dd sub %r11,%rbp b: 48 83 fd 10 cmp $0x10,%rbp f: 7f 29 jg 0x3a 11: 48 85 ed test %rbp,%rbp 14: 0f 84 3e 01 00 00 je 0x158 1a: 4c 89 cd mov %r9,%rbp 1d: 48 f7 d5 not %rbp 20: 48 01 dd add %rbx,%rbp * 23: 41 80 3b 00 cmpb $0x0,(%r11) <-- trapping instruction 27: 0f 85 c9 01 00 00 jne 0x1f6 2d: 49 ff c3 inc %r11 30: 48 ff c5 inc %rbp 33: 75 ee jne 0x23 35: e9 .byte 0xe9 36: 1e (bad) 37: 01 00 add %eax,(%rax)