Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 UID: 0 PID: 7739 Comm: syz-executor Not tainted 6.17.0-rc1-syzkaller-ge4414b01c1cd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 RIP: 0010:___pcpu_freelist_pop kernel/bpf/percpu_freelist.c:114 [inline] RIP: 0010:__pcpu_freelist_pop+0x6b7/0x8c0 kernel/bpf/percpu_freelist.c:125 Code: 10 48 3b 8c 24 80 00 00 00 0f 85 b4 01 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 89 f8 48 c1 e8 03 <80> 3c 18 00 48 89 7c 24 20 74 0a e8 29 3f 41 00 48 8b 7c 24 20 48 RSP: 0018:ffffc9000b147740 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffe8ffffd335b0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffffc9000b147810 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52001628ef4 R12: 1ffffd1ffffa66b5 R13: ffffe8ffffd335a8 R14: 0000000000000001 R15: 0000000000000000 FS: 0000555589975500(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30a1cff8 CR3: 000000007f034000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: pcpu_freelist_pop+0xca/0x170 kernel/bpf/percpu_freelist.c:134 __bpf_get_stackid+0x574/0xcf0 kernel/bpf/stackmap.c:259 ____bpf_get_stackid_raw_tp kernel/trace/bpf_trace.c:1810 [inline] bpf_get_stackid_raw_tp+0x196/0x210 kernel/trace/bpf_trace.c:1799 bpf_prog_b724608cae728045+0x27/0x2f bpf_dispatcher_nop_func include/linux/bpf.h:1332 [inline] __bpf_prog_run include/linux/filter.h:718 [inline] bpf_prog_run include/linux/filter.h:725 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2257 [inline] bpf_trace_run2+0x284/0x4b0 kernel/trace/bpf_trace.c:2298 __do_trace_kfree include/trace/events/kmem.h:94 [inline] trace_kfree include/trace/events/kmem.h:94 [inline] kfree+0x3a0/0x440 mm/slub.c:4866 tcp_saved_syn_free include/linux/tcp.h:586 [inline] tcp_v4_destroy_sock+0x3a2/0x5d0 net/ipv4/tcp_ipv4.c:2594 inet_csk_destroy_sock+0x163/0x3a0 net/ipv4/inet_connection_sock.c:1294 __tcp_close+0xb19/0xde0 net/ipv4/tcp.c:3262 tcp_close+0x28/0x110 net/ipv4/tcp.c:3274 inet_release+0x144/0x190 net/ipv4/af_inet.c:435 __sock_release net/socket.c:649 [inline] sock_close+0xc0/0x240 net/socket.c:1439 __fput+0x44c/0xa70 fs/file_table.c:468 fput_close_sync+0x119/0x200 fs/file_table.c:573 __do_sys_close fs/open.c:1587 [inline] __se_sys_close fs/open.c:1572 [inline] __x64_sys_close+0x7f/0x110 fs/open.c:1572 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc7fd58d84a Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24 RSP: 002b:00007ffe44635d40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc7fd58d84a RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007ffe44635d9c R08: 0000000000000000 R09: 00007ffe44635aa7 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000043 R13: 00000000000927c0 R14: 00000000000358a6 R15: 00007ffe44635df0 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:___pcpu_freelist_pop kernel/bpf/percpu_freelist.c:114 [inline] RIP: 0010:__pcpu_freelist_pop+0x6b7/0x8c0 kernel/bpf/percpu_freelist.c:125 Code: 10 48 3b 8c 24 80 00 00 00 0f 85 b4 01 00 00 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 89 f8 48 c1 e8 03 <80> 3c 18 00 48 89 7c 24 20 74 0a e8 29 3f 41 00 48 8b 7c 24 20 48 RSP: 0018:ffffc9000b147740 EFLAGS: 00010046 RAX: 0000000000000000 RBX: dffffc0000000000 RCX: ffffe8ffffd335b0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000002 RBP: ffffc9000b147810 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffff52001628ef4 R12: 1ffffd1ffffa66b5 R13: ffffe8ffffd335a8 R14: 0000000000000001 R15: 0000000000000000 FS: 0000555589975500(0000) GS:ffff888125d1c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b30a1cff8 CR3: 000000007f034000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 10 48 3b adc %cl,0x3b(%rax) 3: 8c 24 80 mov %fs,(%rax,%rax,4) 6: 00 00 add %al,(%rax) 8: 00 0f add %cl,(%rdi) a: 85 b4 01 00 00 48 8d test %esi,-0x72b80000(%rcx,%rax,1) 11: 65 d8 5b 41 fcomps %gs:0x41(%rbx) 15: 5c pop %rsp 16: 41 5d pop %r13 18: 41 5e pop %r14 1a: 41 5f pop %r15 1c: 5d pop %rbp 1d: c3 ret 1e: cc int3 1f: cc int3 20: cc int3 21: cc int3 22: cc int3 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 18 00 cmpb $0x0,(%rax,%rbx,1) <-- trapping instruction 2e: 48 89 7c 24 20 mov %rdi,0x20(%rsp) 33: 74 0a je 0x3f 35: e8 29 3f 41 00 call 0x413f63 3a: 48 8b 7c 24 20 mov 0x20(%rsp),%rdi 3f: 48 rex.W