general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] CPU: 1 PID: 3451 Comm: syz.4.10584 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:bpf_overflow_handler+0x115/0x370 kernel/events/core.c:9862 Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 4d 65 1a 00 4c 8b 2b 49 8d 5d 38 49 83 c5 30 4c 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 ef e8 2c 65 1a 00 4c 89 e7 48 89 de 41 RSP: 0018:ffffc90001347400 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000038 RCX: 0000000000080000 RDX: ffffc90001c59000 RSI: 0000000000010465 RDI: 0000000000010466 RBP: ffffc90001347500 R08: ffff888134becb4b R09: 1ffff1102697d969 R10: dffffc0000000000 R11: ffffed102697d96a R12: ffffc90001347460 R13: 0000000000000030 R14: 1ffff92000268e88 R15: dffffc0000000000 FS: 00007ffa74b5a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000508 CR3: 0000000140ab5000 CR4: 00000000003506a0 DR0: 0000000000000002 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __perf_event_overflow+0x1b3/0x340 kernel/events/core.c:9086 perf_swevent_overflow kernel/events/core.c:9162 [inline] perf_swevent_event+0x2f7/0x530 kernel/events/core.c:-1 do_perf_sw_event kernel/events/core.c:9303 [inline] ___perf_sw_event+0x3aa/0x4d0 kernel/events/core.c:9334 __perf_sw_event+0x134/0x270 kernel/events/core.c:9346 perf_sw_event include/linux/perf_event.h:1179 [inline] do_user_addr_fault+0xdc2/0xde0 arch/x86/mm/fault.c:1236 handle_page_fault arch/x86/mm/fault.c:1436 [inline] exc_page_fault+0x5a/0xc0 arch/x86/mm/fault.c:1492 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0010:__put_user_nocheck_4+0x3/0x11 Code: 00 00 48 39 d9 73 54 0f 01 cb 66 89 01 31 c9 0f 01 ca c3 90 90 90 90 90 48 bb fd ef ff ff ff 7f 00 00 48 39 d9 73 34 0f 01 cb <89> 01 31 c9 0f 01 ca c3 90 90 90 90 90 90 48 bb f9 ef ff ff ff 7f RSP: 0018:ffffc90001347a38 EFLAGS: 00050283 RAX: 0000000000000000 RBX: 0000200000000508 RCX: 0000200000000508 RDX: ffffc90001c59000 RSI: 000000000001044e RDI: 000000000001044f RBP: ffffc90001347a70 R08: ffff8881350592cf R09: 1ffff11026a0b259 R10: dffffc0000000000 R11: ffffed1026a0b25a R12: ffffc90001347b20 R13: 0000000000000000 R14: 0000000000000000 R15: 00000000000000dd ____sys_recvmsg+0x32f/0x5e0 net/socket.c:2602 ___sys_recvmsg+0x21a/0x5c0 net/socket.c:2637 __sys_recvmsg net/socket.c:2667 [inline] __do_sys_recvmsg net/socket.c:2677 [inline] __se_sys_recvmsg net/socket.c:2674 [inline] __x64_sys_recvmsg+0x1f6/0x2c0 net/socket.c:2674 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ffa760ffdd9 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffa74b5a028 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007ffa76378fa0 RCX: 00007ffa760ffdd9 RDX: 0000000000000002 RSI: 0000200000000500 RDI: 000000000000000b RBP: 00007ffa76195d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffa76379038 R14: 00007ffa76378fa0 R15: 00007ffd10d36858 Modules linked in: ---[ end trace 7d1a35a494be10a7 ]--- RIP: 0010:bpf_overflow_handler+0x115/0x370 kernel/events/core.c:9862 Code: 00 00 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 4d 65 1a 00 4c 8b 2b 49 8d 5d 38 49 83 c5 30 4c 89 e8 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 ef e8 2c 65 1a 00 4c 89 e7 48 89 de 41 RSP: 0018:ffffc90001347400 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000038 RCX: 0000000000080000 RDX: ffffc90001c59000 RSI: 0000000000010465 RDI: 0000000000010466 RBP: ffffc90001347500 R08: ffff888134becb4b R09: 1ffff1102697d969 R10: dffffc0000000000 R11: ffffed102697d96a R12: ffffc90001347460 R13: 0000000000000030 R14: 1ffff92000268e88 R15: dffffc0000000000 FS: 00007ffa74b5a6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000508 CR3: 0000000140ab5000 CR4: 00000000003506a0 DR0: 0000000000000002 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 89 d8 mov %rbx,%rax 5: 48 c1 e8 03 shr $0x3,%rax 9: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) e: 74 08 je 0x18 10: 48 89 df mov %rbx,%rdi 13: e8 4d 65 1a 00 call 0x1a6565 18: 4c 8b 2b mov (%rbx),%r13 1b: 49 8d 5d 38 lea 0x38(%r13),%rbx 1f: 49 83 c5 30 add $0x30,%r13 23: 4c 89 e8 mov %r13,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 4c 89 ef mov %r13,%rdi 34: e8 2c 65 1a 00 call 0x1a6565 39: 4c 89 e7 mov %r12,%rdi 3c: 48 89 de mov %rbx,%rsi 3f: 41 rex.B