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: 5497 Comm: syz.2.1422 Tainted: G W syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025 RIP: 0010:bpf_overflow_handler+0x10c/0x3a0 kernel/events/core.c:9862 Code: 80 3c 28 00 74 08 48 89 df e8 a0 20 1a 00 4c 8b 2b 49 8d 5d 38 49 83 c5 30 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 76 20 1a 00 4c 89 e7 48 89 de 41 ff RSP: 0018:ffffc90008647400 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000038 RCX: dffffc0000000000 RDX: ffffc90002910000 RSI: 000000000001270e RDI: 000000000001270f RBP: ffffc90008647500 R08: dffffc0000000000 R09: ffffed102515456a R10: ffffed102515456a R11: 1ffff11025154569 R12: ffffc90008647460 R13: 0000000000000030 R14: ffff888128aa2800 R15: 1ffff920010c8e88 FS: 00007fe27e3a66c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000001b7000 CR3: 000000012b5ba000 CR4: 00000000003506a0 DR0: 0000200000000300 DR1: 0000200000000300 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+0x377/0x470 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+0xc6a/0xc80 arch/x86/mm/fault.c:1255 handle_page_fault arch/x86/mm/fault.c:1428 [inline] exc_page_fault+0x5a/0xc0 arch/x86/mm/fault.c:1484 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:571 RIP: 0010:copy_user_enhanced_fast_string+0xe/0x40 arch/x86/lib/copy_user_64.S:206 Code: 89 d1 c1 e9 03 83 e2 07 f3 48 a5 89 d1 f3 a4 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 0f 01 cb 83 fa 40 0f 82 70 ff ff ff 89 d1 a4 31 c0 0f 01 ca c3 90 90 90 90 90 90 90 90 90 90 89 d1 83 f8 RSP: 0018:ffffc90008647a20 EFLAGS: 00050206 RAX: ffffffff82391101 RBX: 0000000000001000 RCX: 00000000000001c0 RDX: 0000000000001000 RSI: 00002000001b7000 RDI: ffff888118f12e40 RBP: ffffc90008647ab0 R08: dffffc0000000000 R09: ffffed10231e2600 R10: 0000000000000000 R11: 0000000000000200 R12: 0000000000001000 R13: dffffc00000000ff R14: 00002000001b61c0 R15: ffff888118f12000 pipe_write+0x914/0x1890 fs/pipe.c:529 call_write_iter include/linux/fs.h:2066 [inline] new_sync_write fs/read_write.c:518 [inline] vfs_write+0x725/0xd60 fs/read_write.c:605 ksys_write+0x140/0x240 fs/read_write.c:658 __do_sys_write fs/read_write.c:670 [inline] __se_sys_write fs/read_write.c:667 [inline] __x64_sys_write+0x7b/0x90 fs/read_write.c:667 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fe27f93e749 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:00007fe27e3a6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fe27fb94fa0 RCX: 00007fe27f93e749 RDX: 00000000fffffdef RSI: 00002000000001c0 RDI: 0000000000000000 RBP: 00007fe27f9c2f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fe27fb95038 R14: 00007fe27fb94fa0 R15: 00007ffcdf648d68 Modules linked in: ---[ end trace c797ae753deae52d ]--- RIP: 0010:bpf_overflow_handler+0x10c/0x3a0 kernel/events/core.c:9862 Code: 80 3c 28 00 74 08 48 89 df e8 a0 20 1a 00 4c 8b 2b 49 8d 5d 38 49 83 c5 30 4c 89 e8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 4c 89 ef e8 76 20 1a 00 4c 89 e7 48 89 de 41 ff RSP: 0018:ffffc90008647400 EFLAGS: 00010206 RAX: 0000000000000006 RBX: 0000000000000038 RCX: dffffc0000000000 RDX: ffffc90002910000 RSI: 000000000001270e RDI: 000000000001270f RBP: ffffc90008647500 R08: dffffc0000000000 R09: ffffed102515456a R10: ffffed102515456a R11: 1ffff11025154569 R12: ffffc90008647460 R13: 0000000000000030 R14: ffff888128aa2800 R15: 1ffff920010c8e88 FS: 00007fe27e3a66c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00002000001b7000 CR3: 000000012b5ba000 CR4: 00000000003506a0 DR0: 0000200000000300 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 ---------------- Code disassembly (best guess): 0: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 4: 74 08 je 0xe 6: 48 89 df mov %rbx,%rdi 9: e8 a0 20 1a 00 call 0x1a20ae e: 4c 8b 2b mov (%rbx),%r13 11: 49 8d 5d 38 lea 0x38(%r13),%rbx 15: 49 83 c5 30 add $0x30,%r13 19: 4c 89 e8 mov %r13,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 27: fc ff df * 2a: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 4c 89 ef mov %r13,%rdi 33: e8 76 20 1a 00 call 0x1a20ae 38: 4c 89 e7 mov %r12,%rdi 3b: 48 89 de mov %rbx,%rsi 3e: 41 rex.B 3f: ff .byte 0xff