Oops: general protection fault, probably for non-canonical address 0xdffffc00000a2403: 0000 [#1] SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000000512018-0x000000000051201f] CPU: 1 UID: 0 PID: 7971 Comm: syz.4.552 Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline] RIP: 0010:__smc_diag_dump net/smc/smc_diag.c:89 [inline] RIP: 0010:smc_diag_dump_proto+0x6d9/0x3280 net/smc/smc_diag.c:217 Code: 80 3c 2f 00 74 08 48 89 df e8 03 ef 5e f6 48 89 5c 24 28 48 8b 1b 48 85 db 0f 84 51 02 00 00 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 d8 ee 5e f6 48 8b 44 24 18 4c 8d RSP: 0018:ffffc90003e7ee80 EFLAGS: 00010206 RAX: 00000000000a2403 RBX: 0000000000512018 RCX: ffff88807ea58000 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc90003e7f310 R08: ffffffff89efde32 R09: 1ffff11009b3a78b R10: dffffc0000000000 R11: ffffed1009b3a78c R12: ffff88804da10000 R13: dffffc0000000000 R14: ffff88804d9d3c00 R15: 1ffff11009b3a82b FS: 00007f403e3bc6c0(0000) GS:ffff8881250ea000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000e000 CR3: 000000007d5d6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smc_diag_dump+0x59/0xa0 net/smc/smc_diag.c:236 netlink_dump+0x678/0xeb0 net/netlink/af_netlink.c:2309 __netlink_dump_start+0x5a2/0x790 net/netlink/af_netlink.c:2424 netlink_dump_start include/linux/netlink.h:340 [inline] smc_diag_handler_dump+0x1ba/0x260 net/smc/smc_diag.c:251 sock_diag_rcv_msg+0x3dc/0x5f0 net/core/sock_diag.c:-1 netlink_rcv_skb+0x208/0x480 net/netlink/af_netlink.c:2534 netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline] netlink_unicast+0x7f8/0x9a0 net/netlink/af_netlink.c:1339 netlink_sendmsg+0x8c3/0xcd0 net/netlink/af_netlink.c:1883 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:727 ____sys_sendmsg+0x523/0x860 net/socket.c:2566 ___sys_sendmsg net/socket.c:2620 [inline] __sys_sendmsg+0x271/0x360 net/socket.c:2652 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f403d58d169 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:00007f403e3bc038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f403d7a6080 RCX: 00007f403d58d169 RDX: 0000000000000600 RSI: 0000200000000540 RDI: 000000000000000a RBP: 00007f403d60e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f403d7a6080 R15: 00007ffc2f635578 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline] RIP: 0010:__smc_diag_dump net/smc/smc_diag.c:89 [inline] RIP: 0010:smc_diag_dump_proto+0x6d9/0x3280 net/smc/smc_diag.c:217 Code: 80 3c 2f 00 74 08 48 89 df e8 03 ef 5e f6 48 89 5c 24 28 48 8b 1b 48 85 db 0f 84 51 02 00 00 48 83 c3 18 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 d8 ee 5e f6 48 8b 44 24 18 4c 8d RSP: 0018:ffffc90003e7ee80 EFLAGS: 00010206 RAX: 00000000000a2403 RBX: 0000000000512018 RCX: ffff88807ea58000 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc90003e7f310 R08: ffffffff89efde32 R09: 1ffff11009b3a78b R10: dffffc0000000000 R11: ffffed1009b3a78c R12: ffff88804da10000 R13: dffffc0000000000 R14: ffff88804d9d3c00 R15: 1ffff11009b3a82b FS: 00007f403e3bc6c0(0000) GS:ffff8881250ea000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000020000000e000 CR3: 000000007d5d6000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 80 3c 2f 00 cmpb $0x0,(%rdi,%rbp,1) 4: 74 08 je 0xe 6: 48 89 df mov %rbx,%rdi 9: e8 03 ef 5e f6 call 0xf65eef11 e: 48 89 5c 24 28 mov %rbx,0x28(%rsp) 13: 48 8b 1b mov (%rbx),%rbx 16: 48 85 db test %rbx,%rbx 19: 0f 84 51 02 00 00 je 0x270 1f: 48 83 c3 18 add $0x18,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 d8 ee 5e f6 call 0xf65eef11 39: 48 8b 44 24 18 mov 0x18(%rsp),%rax 3e: 4c rex.WR 3f: 8d .byte 0x8d