------------[ cut here ]------------ WARNING: CPU: 1 PID: 6011 at kernel/events/core.c:10329 __perf_event_overflow+0xaf9/0xe10 kernel/events/core.c:10329 Modules linked in: CPU: 1 UID: 0 PID: 6011 Comm: syz.0.18 Not tainted 6.16.0-rc4-syzkaller-gbf4807c89d8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__perf_event_overflow+0xaf9/0xe10 kernel/events/core.c:10329 Code: 89 3e 4c 8b 3c 24 e9 c3 fc ff ff e8 41 1d d0 ff 49 bd 00 00 00 00 00 fc ff df 4c 8b 74 24 28 e9 06 fe ff ff e8 28 1d d0 ff 90 <0f> 0b 90 e9 1b ff ff ff e8 1a 1d d0 ff 48 c7 c7 20 e3 93 8b e8 8e RSP: 0018:ffffc900031773c0 EFLAGS: 00010293 RAX: ffffffff81f04178 RBX: ffff88801d2c8640 RCX: ffff888011448000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900031774d0 R08: ffff88801d2c888f R09: 1ffff11003a59111 R10: dffffc0000000000 R11: ffffed1003a59112 R12: ffffc90003177968 R13: dffffc0000000000 R14: ffff88801d2c8888 R15: 0000000000000000 FS: 00007fd072acf6c0(0000) GS:ffff888125d1f000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000430 CR3: 00000000794f6000 CR4: 00000000003526f0 Call Trace: perf_swevent_overflow kernel/events/core.c:10427 [inline] perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1 do_perf_sw_event kernel/events/core.c:10567 [inline] ___perf_sw_event+0x4a1/0x700 kernel/events/core.c:10594 __perf_sw_event+0xfa/0x1a0 kernel/events/core.c:10606 perf_sw_event include/linux/perf_event.h:1596 [inline] do_user_addr_fault+0x12e4/0x1390 arch/x86/mm/fault.c:1283 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x76/0xf0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:__put_user_nocheck_4+0x3/0x10 arch/x86/lib/putuser.S:104 Code: d9 0f 01 cb 89 01 31 c9 0f 01 ca e9 17 3b 03 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 01 cb <89> 01 31 c9 0f 01 ca c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90003177a18 EFLAGS: 00050246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000200000000430 RDX: ffff888011448000 RSI: 0000000000000000 RDI: 00000000ffffffff RBP: ffffc90003177b90 R08: ffffc90003177607 R09: 1ffff9200062eec0 R10: dffffc0000000000 R11: fffff5200062eec1 R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000200000000400 ____sys_recvmsg+0x2ab/0x460 net/socket.c:2799 ___sys_recvmsg+0x1b5/0x510 net/socket.c:2828 __sys_recvmsg net/socket.c:2861 [inline] __do_sys_recvmsg net/socket.c:2867 [inline] __se_sys_recvmsg net/socket.c:2864 [inline] __x64_sys_recvmsg+0x198/0x260 net/socket.c:2864 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: 0033:0x7fd071b8e929 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:00007fd072acf038 EFLAGS: 00000246 ORIG_RAX: 000000000000002f RAX: ffffffffffffffda RBX: 00007fd071db5fa0 RCX: 00007fd071b8e929 RDX: 0000000000000000 RSI: 0000200000000400 RDI: 0000000000000004 RBP: 00007fd071c10b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd071db5fa0 R15: 00007fff006e3db8 ---------------- Code disassembly (best guess): 0: d9 0f (bad) (%rdi) 2: 01 cb add %ecx,%ebx 4: 89 01 mov %eax,(%rcx) 6: 31 c9 xor %ecx,%ecx 8: 0f 01 ca clac b: e9 17 3b 03 00 jmp 0x33b27 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop 16: 90 nop 17: 90 nop 18: 90 nop 19: 90 nop 1a: 90 nop 1b: 90 nop 1c: 90 nop 1d: 90 nop 1e: 90 nop 1f: 90 nop 20: 90 nop 21: 90 nop 22: 90 nop 23: 90 nop 24: 90 nop 25: 90 nop 26: 90 nop 27: 0f 01 cb stac * 2a: 89 01 mov %eax,(%rcx) <-- trapping instruction 2c: 31 c9 xor %ecx,%ecx 2e: 0f 01 ca clac 31: c3 ret 32: cc int3 33: cc int3 34: cc int3 35: cc int3 36: 90 nop 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop