Unable to handle kernel paging request at virtual address dfff800000000000 KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000000] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 8647 Comm: syz-executor.1 Tainted: G W 6.10.0-rc2-syzkaller-g8867bbd4a056 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : tipc_udp_nl_dump_remoteip+0x558/0xba0 lr : tipc_udp_nl_dump_remoteip+0x434/0xba0 net/tipc/udp_media.c:506 sp : ffff8000984f6de0 x29: ffff8000984f6f90 x28: 0000000000000000 x27: ffff70001309edd0 x26: 0000000000000000 x25: ffff0000ed71b590 x24: 0000000000000030 x23: 0000000000000000 x22: dfff800000000000 x21: ffff0000e4ed9140 x20: ffff0000e4ed9210 x19: ffff0000c2cb0098 x18: ffff8000984f6ea2 x17: ffff80008efed000 x16: ffff80008055b06c x15: 0000000000000001 x14: ffff80008eff0558 x13: dfff800000000000 x12: 00000000056aac64 x11: ffff8000984f6ec2 x10: ffff0000ed71b598 x9 : ffff0000e4ed9208 x8 : 0000000000000000 x7 : ffff80008a944c44 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000001 Call trace: tipc_udp_nl_dump_remoteip+0x558/0xba0 genl_dumpit+0x100/0x1b4 net/netlink/genetlink.c:1027 netlink_dump+0x584/0xbf0 net/netlink/af_netlink.c:2337 __netlink_dump_start+0x4d4/0x71c net/netlink/af_netlink.c:2454 genl_family_rcv_msg_dumpit net/netlink/genetlink.c:1076 [inline] genl_family_rcv_msg net/netlink/genetlink.c:1192 [inline] genl_rcv_msg+0x6c8/0xbb0 net/netlink/genetlink.c:1210 netlink_rcv_skb+0x214/0x3c4 net/netlink/af_netlink.c:2564 genl_rcv+0x38/0x50 net/netlink/genetlink.c:1219 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x65c/0x898 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x7a0/0xa84 net/netlink/af_netlink.c:1905 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] ____sys_sendmsg+0x56c/0x840 net/socket.c:2585 ___sys_sendmsg net/socket.c:2639 [inline] __sys_sendmsg+0x26c/0x33c net/socket.c:2668 __do_sys_sendmsg net/socket.c:2677 [inline] __se_sys_sendmsg net/socket.c:2675 [inline] __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2675 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Code: a9034be8 d343fd48 a90823e9 d343fee8 (38766908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: a9034be8 stp x8, x18, [sp, #48] 4: d343fd48 lsr x8, x10, #3 8: a90823e9 stp x9, x8, [sp, #128] c: d343fee8 lsr x8, x23, #3 * 10: 38766908 ldrb w8, [x8, x22] <-- trapping instruction