------------[ cut here ]------------ WARNING: CPU: 0 PID: 5921 at kernel/events/core.c:10226 __perf_event_overflow+0xaf9/0xe10 kernel/events/core.c:10226 Modules linked in: CPU: 0 UID: 0 PID: 5921 Comm: syz.1.9 Not tainted 6.15.0-rc4-syzkaller-gb4432656b36e #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:10226 Code: 89 3e 4c 8b 3c 24 e9 c3 fc ff ff e8 b1 73 d0 ff 49 bd 00 00 00 00 00 fc ff df 4c 8b 74 24 28 e9 06 fe ff ff e8 98 73 d0 ff 90 <0f> 0b 90 e9 1b ff ff ff e8 8a 73 d0 ff 48 c7 c7 60 b3 73 8b e8 9e RSP: 0018:ffffc90004677140 EFLAGS: 00010287 RAX: ffffffff81ef4b38 RBX: ffff88801ca89260 RCX: 0000000000080000 RDX: ffffc90004bba000 RSI: 00000000000002c2 RDI: 00000000000002c3 RBP: ffffc90004677250 R08: ffff88801ca8949f R09: 1ffff11003951293 R10: dffffc0000000000 R11: ffffed1003951294 R12: ffffc900046776c8 R13: dffffc0000000000 R14: ffff88801ca89498 R15: 0000000000000000 FS: 00007f885b3f66c0(0000) GS:ffff8881260cc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000001000 CR3: 000000007b9f8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: perf_swevent_overflow kernel/events/core.c:10324 [inline] perf_swevent_event+0x2f4/0x5e0 kernel/events/core.c:-1 do_perf_sw_event kernel/events/core.c:10464 [inline] ___perf_sw_event+0x4a1/0x700 kernel/events/core.c:10491 __perf_sw_event+0xfa/0x1a0 kernel/events/core.c:10503 perf_sw_event include/linux/perf_event.h:1537 [inline] do_user_addr_fault+0x12e4/0x1390 arch/x86/mm/fault.c:1284 handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x68/0x110 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:rep_movs_alternative+0x4a/0x90 arch/x86/lib/copy_user_64.S:74 Code: cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 RSP: 0018:ffffc90004677778 EFLAGS: 00050206 RAX: ffffffff84b61901 RBX: ffff8880117c0000 RCX: 0000000000033020 RDX: 0000000000000001 RSI: 0000200000001000 RDI: ffff8880117c0fc0 RBP: ffffc900046778d0 R08: ffff8880117f3fdf R09: 1ffff110022fe7fb R10: dffffc0000000000 R11: ffffed10022fe7fc R12: 1ffff920008cefc3 R13: 0000200000000040 R14: ffffc90004677e28 R15: 0000000000033fe0 copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] copy_from_user_iter lib/iov_iter.c:55 [inline] iterate_ubuf include/linux/iov_iter.h:30 [inline] iterate_and_advance2 include/linux/iov_iter.h:300 [inline] iterate_and_advance include/linux/iov_iter.h:328 [inline] __copy_from_iter lib/iov_iter.c:249 [inline] _copy_from_iter+0x24c/0x15a0 lib/iov_iter.c:260 copy_from_iter include/linux/uio.h:228 [inline] copy_from_iter_full include/linux/uio.h:245 [inline] memcpy_from_msg include/linux/skbuff.h:4180 [inline] netlink_sendmsg+0x6b2/0xb30 net/netlink/af_netlink.c:1868 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:727 ____sys_sendmsg+0x505/0x830 net/socket.c:2566 ___sys_sendmsg+0x21f/0x2a0 net/socket.c:2620 __sys_sendmsg net/socket.c:2652 [inline] __do_sys_sendmsg net/socket.c:2657 [inline] __se_sys_sendmsg net/socket.c:2655 [inline] __x64_sys_sendmsg+0x19b/0x260 net/socket.c:2655 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f885d58e969 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:00007f885b3f6038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f885d7b5fa0 RCX: 00007f885d58e969 RDX: 0000000000000000 RSI: 0000200000000000 RDI: 0000000000000005 RBP: 00007f885d610ab1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f885d7b5fa0 R15: 00007fffdbdd86b8 ---------------- Code disassembly (best guess): 0: cc int3 1: cc int3 2: cc int3 3: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) a: 00 00 00 d: 0f 1f 00 nopl (%rax) 10: 48 8b 06 mov (%rsi),%rax 13: 48 89 07 mov %rax,(%rdi) 16: 48 83 c6 08 add $0x8,%rsi 1a: 48 83 c7 08 add $0x8,%rdi 1e: 83 e9 08 sub $0x8,%ecx 21: 74 db je 0xfffffffe 23: 83 f9 08 cmp $0x8,%ecx 26: 73 e8 jae 0x10 28: eb c5 jmp 0xffffffef * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: c3 ret 2d: cc int3 2e: cc int3 2f: cc int3 30: cc int3 31: 48 8b 06 mov (%rsi),%rax 34: 48 89 07 mov %rax,(%rdi) 37: 48 8d 47 08 lea 0x8(%rdi),%rax 3b: 48 83 e0 f8 and $0xfffffffffffffff8,%rax 3f: 48 rex.W