RSP: 002b:00007f23034ee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2305515fa0 RCX: 00007f230529ce59 RDX: 00002000000002c0 RSI: 0000000000008931 RDI: 0000000000000003 RBP: 00007f23034ee090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f2305516038 R14: 00007f2305515fa0 R15: 00007ffde636dce8 ------------[ cut here ]------------ netdevice: dummy0: failed to sync uc/mc addresses WARNING: net/core/dev_addr_lists.c:1278 at netif_rx_mode_run+0xb56/0x1370 net/core/dev_addr_lists.c:1278, CPU#1: syz.8.5051/20868 Modules linked in: CPU: 1 UID: 0 PID: 20868 Comm: syz.8.5051 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)} Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:netif_rx_mode_run+0xc8a/0x1370 net/core/dev_addr_lists.c:1278 Code: 3a 48 c7 c2 80 38 51 8c eb 1a e8 71 f4 b0 f8 48 c7 c2 00 37 51 8c eb 0c e8 63 f4 b0 f8 48 c7 c2 00 38 51 8c 4c 89 f7 4c 89 fe <67> 48 0f b9 3a 4c 8b 6c 24 28 e9 3c 02 00 00 84 c0 74 31 e8 3e f4 RSP: 0018:ffffc900046f7a00 EFLAGS: 00010293 RAX: ffffffff8914a62f RBX: dffffc0000000000 RCX: ffff888011fedd00 RDX: ffffffff8c513700 RSI: ffff88805ed3a120 RDI: ffffffff8fbd0180 RBP: ffffc900046f7bd0 R08: ffff888011fedd00 R09: 0000000000000006 R10: 0000000000000100 R11: 0000000000000005 R12: 0000000000000001 R13: ffff88805ed3a120 R14: ffffffff8fbd0180 R15: ffff88805ed3a120 FS: 00007f23034ee6c0(0000) GS:ffff888125d7e000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b32a63fff CR3: 0000000051cb0000 CR4: 00000000003526f0 DR0: 0000000000000001 DR1: 00000000000001f8 DR2: 0000000000000003 DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Call Trace: netif_rx_mode_sync+0x24/0xa0 net/core/dev_addr_lists.c:1428 dev_ifsioc+0xf51/0x1330 net/core/dev_ioctl.c:596 dev_ioctl+0x7b4/0x1150 net/core/dev_ioctl.c:816 sock_do_ioctl+0x23e/0x320 net/socket.c:1342 sock_ioctl+0x5c9/0x7f0 net/socket.c:1449 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xff/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f230529ce59 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:00007f23034ee028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f2305515fa0 RCX: 00007f230529ce59 RDX: 00002000000002c0 RSI: 0000000000008931 RDI: 0000000000000003 RBP: 00007f23034ee090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f2305516038 R14: 00007f2305515fa0 R15: 00007ffde636dce8 ---------------- Code disassembly (best guess): 0: 3a 48 c7 cmp -0x39(%rax),%cl 3: c2 80 38 ret $0x3880 6: 51 push %rcx 7: 8c eb mov %gs,%ebx 9: 1a e8 sbb %al,%ch b: 71 f4 jno 0x1 d: b0 f8 mov $0xf8,%al f: 48 c7 c2 00 37 51 8c mov $0xffffffff8c513700,%rdx 16: eb 0c jmp 0x24 18: e8 63 f4 b0 f8 call 0xf8b0f480 1d: 48 c7 c2 00 38 51 8c mov $0xffffffff8c513800,%rdx 24: 4c 89 f7 mov %r14,%rdi 27: 4c 89 fe mov %r15,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 4c 8b 6c 24 28 mov 0x28(%rsp),%r13 34: e9 3c 02 00 00 jmp 0x275 39: 84 c0 test %al,%al 3b: 74 31 je 0x6e 3d: e8 .byte 0xe8 3e: 3e f4 ds hlt