netlink: 136 bytes leftover after parsing attributes in process `syz.0.710'. Oops: general protection fault, probably for non-canonical address 0xf5b591f5d5351575: 0000 [#1] SMP KASAN PTI KASAN: maybe wild-memory-access in range [0xadacafaea9a8aba8-0xadacafaea9a8abaf] CPU: 0 UID: 0 PID: 8127 Comm: syz.0.710 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:blk_mq_clear_rq_mapping block/blk-mq.c:3484 [inline] RIP: 0010:blk_mq_free_rqs+0x41b/0x680 block/blk-mq.c:3522 Code: 31 ff e8 68 b8 32 fd 48 89 d8 89 db 4c 21 f8 0f 85 d5 01 00 00 e8 75 b3 32 fd 41 bd 00 10 00 00 89 d9 49 d3 e5 48 8b 44 24 10 <0f> b6 04 28 84 c0 0f 85 d2 01 00 00 48 8b 44 24 08 8b 18 31 ff 89 RSP: 0018:ffffc9001b066c98 EFLAGS: 00010206 RAX: 15b595f5d5351575 RBX: 0000000000000004 RCX: 0000000000000004 RDX: ffffc90004069000 RSI: 0000000000003ebc RDI: 0000000000003ebd RBP: dffffc0000000000 R08: ffffffff9030dbf7 R09: 1ffffffff2061b7e R10: dffffc0000000000 R11: fffffbfff2061b7f R12: adacafaea9a8ac3a R13: 0000000000010000 R14: ffffea0001f60008 R15: 00000000ffffffc0 FS: 00007f85789256c0(0000) GS:ffff888125287000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c28c9fe CR3: 000000007beac000 CR4: 00000000003526f0 Call Trace: blk_mq_free_map_and_rqs+0x40/0xf0 block/blk-mq.c:4178 blk_mq_free_sched_tags block/blk-mq-sched.c:425 [inline] blk_mq_free_sched_res+0xeb/0x280 block/blk-mq-sched.c:436 elevator_change_done+0x1d2/0x5f0 block/elevator.c:639 elevator_change+0x321/0x450 block/elevator.c:685 elevator_set_none+0xb5/0x140 block/elevator.c:769 blk_mq_elv_switch_none block/blk-mq.c:5131 [inline] __blk_mq_update_nr_hw_queues block/blk-mq.c:5176 [inline] blk_mq_update_nr_hw_queues+0x5e7/0x1a60 block/blk-mq.c:5241 nbd_start_device+0x17f/0xb10 drivers/block/nbd.c:1489 nbd_genl_connect+0x165b/0x1cf0 drivers/block/nbd.c:2239 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2551 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1895 sock_sendmsg_nosec net/socket.c:787 [inline] __sock_sendmsg net/socket.c:802 [inline] ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752 __sys_sendmsg net/socket.c:2784 [inline] __do_sys_sendmsg net/socket.c:2789 [inline] __se_sys_sendmsg net/socket.c:2787 [inline] __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f857799cdd9 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:00007f8578925028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f8577c15fa0 RCX: 00007f857799cdd9 RDX: 0000000020000000 RSI: 0000200000001ac0 RDI: 0000000000000006 RBP: 00007f8577a32d69 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f8577c16038 R14: 00007f8577c15fa0 R15: 00007fff9e9be278 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:blk_mq_clear_rq_mapping block/blk-mq.c:3484 [inline] RIP: 0010:blk_mq_free_rqs+0x41b/0x680 block/blk-mq.c:3522 Code: 31 ff e8 68 b8 32 fd 48 89 d8 89 db 4c 21 f8 0f 85 d5 01 00 00 e8 75 b3 32 fd 41 bd 00 10 00 00 89 d9 49 d3 e5 48 8b 44 24 10 <0f> b6 04 28 84 c0 0f 85 d2 01 00 00 48 8b 44 24 08 8b 18 31 ff 89 RSP: 0018:ffffc9001b066c98 EFLAGS: 00010206 RAX: 15b595f5d5351575 RBX: 0000000000000004 RCX: 0000000000000004 RDX: ffffc90004069000 RSI: 0000000000003ebc RDI: 0000000000003ebd RBP: dffffc0000000000 R08: ffffffff9030dbf7 R09: 1ffffffff2061b7e R10: dffffc0000000000 R11: fffffbfff2061b7f R12: adacafaea9a8ac3a R13: 0000000000010000 R14: ffffea0001f60008 R15: 00000000ffffffc0 FS: 00007f85789256c0(0000) GS:ffff888125287000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f85788a1d58 CR3: 000000007beac000 CR4: 00000000003526f0 ---------------- Code disassembly (best guess): 0: 31 ff xor %edi,%edi 2: e8 68 b8 32 fd call 0xfd32b86f 7: 48 89 d8 mov %rbx,%rax a: 89 db mov %ebx,%ebx c: 4c 21 f8 and %r15,%rax f: 0f 85 d5 01 00 00 jne 0x1ea 15: e8 75 b3 32 fd call 0xfd32b38f 1a: 41 bd 00 10 00 00 mov $0x1000,%r13d 20: 89 d9 mov %ebx,%ecx 22: 49 d3 e5 shl %cl,%r13 25: 48 8b 44 24 10 mov 0x10(%rsp),%rax * 2a: 0f b6 04 28 movzbl (%rax,%rbp,1),%eax <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 d2 01 00 00 jne 0x208 36: 48 8b 44 24 08 mov 0x8(%rsp),%rax 3b: 8b 18 mov (%rax),%ebx 3d: 31 ff xor %edi,%edi 3f: 89 .byte 0x89