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List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:18c5:b0:3a0:b23a:81f2 with SMTP id e9e14a558f8ab-3a0b23a8477mr49452825ab.12.1726661582024; Wed, 18 Sep 2024 05:13:02 -0700 (PDT) Date: Wed, 18 Sep 2024 05:13:02 -0700 In-Reply-To: <20240918090515.212605-1-aha310510@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <0000000000003e8a5a062263ba5d@google.com> Subject: Re: [syzbot] [net?] [s390?] general protection fault in smc_diag_dump_proto From: syzbot To: aha310510@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: general protection fault in smc_diag_dump_proto Oops: general protection fault, probably for non-canonical address 0xdffffc00000a2403: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: probably user-memory-access in range [0x0000000000512018-0x000000000051201f] CPU: 0 UID: 0 PID: 6007 Comm: syz.1.56 Not tainted 6.11.0-syzkaller-05026-g39b3f4e0db5d-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 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+0x6d9/0x3270 net/smc/smc_diag.c:217 Code: 80 3c 2c 00 74 08 48 89 df e8 13 47 96 f6 48 89 5c 24 30 48 8b 1b 48 85 db 0f 84 2d 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 e8 46 96 f6 48 8b 44 24 28 4c 8d RSP: 0018:ffffc9000232eb00 EFLAGS: 00010206 RAX: 00000000000a2403 RBX: 0000000000512018 RCX: ffff888021765a00 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc9000232ef90 R08: ffffffff89984322 R09: 1ffff1100478378b R10: dffffc0000000000 R11: ffffed100478378c R12: 1ffff1100478382b R13: dffffc0000000000 R14: ffff888023c1bc00 R15: ffff88806a9a8010 FS: 00007f10eb3d36c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10eb3d2fa8 CR3: 0000000029d36000 CR4: 00000000003506f0 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+0x647/0xd80 net/netlink/af_netlink.c:2325 __netlink_dump_start+0x5a2/0x790 net/netlink/af_netlink.c:2440 netlink_dump_start include/linux/netlink.h:339 [inline] smc_diag_handler_dump+0x1ab/0x250 net/smc/smc_diag.c:251 sock_diag_rcv_msg+0x3dc/0x5f0 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2550 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline] netlink_unicast+0x7f6/0x990 net/netlink/af_netlink.c:1357 netlink_sendmsg+0x8e4/0xcb0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_sendmsg+0x134/0x200 net/socket.c:768 splice_to_socket+0xa10/0x10b0 fs/splice.c:889 do_splice_from fs/splice.c:941 [inline] do_splice+0xd68/0x18e0 fs/splice.c:1354 __do_splice fs/splice.c:1436 [inline] __do_sys_splice fs/splice.c:1652 [inline] __se_sys_splice+0x331/0x4a0 fs/splice.c:1634 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f10ea575f19 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:00007f10eb3d3048 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007f10ea706038 RCX: 00007f10ea575f19 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f10ea5e4e68 R08: 0000000080000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f10ea706038 R15: 00007ffc7d1ca708 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+0x6d9/0x3270 net/smc/smc_diag.c:217 Code: 80 3c 2c 00 74 08 48 89 df e8 13 47 96 f6 48 89 5c 24 30 48 8b 1b 48 85 db 0f 84 2d 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 e8 46 96 f6 48 8b 44 24 28 4c 8d RSP: 0018:ffffc9000232eb00 EFLAGS: 00010206 RAX: 00000000000a2403 RBX: 0000000000512018 RCX: ffff888021765a00 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc9000232ef90 R08: ffffffff89984322 R09: 1ffff1100478378b R10: dffffc0000000000 R11: ffffed100478378c R12: 1ffff1100478382b R13: dffffc0000000000 R14: ffff888023c1bc00 R15: ffff88806a9a8010 FS: 00007f10eb3d36c0(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f10eb3d2fa8 CR3: 0000000029d36000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 80 3c 2c 00 cmpb $0x0,(%rsp,%rbp,1) 4: 74 08 je 0xe 6: 48 89 df mov %rbx,%rdi 9: e8 13 47 96 f6 call 0xf6964721 e: 48 89 5c 24 30 mov %rbx,0x30(%rsp) 13: 48 8b 1b mov (%rbx),%rbx 16: 48 85 db test %rbx,%rbx 19: 0f 84 2d 02 00 00 je 0x24c 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 e8 46 96 f6 call 0xf6964721 39: 48 8b 44 24 28 mov 0x28(%rsp),%rax 3e: 4c rex.WR 3f: 8d .byte 0x8d Tested on: commit: 39b3f4e0 Merge tag 'hardening-v6.12-rc1' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=17a1c4a9980000 kernel config: https://syzkaller.appspot.com/x/.config?x=5c3b301db2ae9f24 dashboard link: https://syzkaller.appspot.com/bug?extid=f69bfae0a4eb29976e44 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Note: no patches were applied.