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Message-ID: <000000000000fabef5061f429db7@google.com> Date: Fri, 09 Aug 2024 09:27:19 -0700 From: syzbot <syzbot+f69bfae0a4eb29976e44@...kaller.appspotmail.com> To: agordeev@...ux.ibm.com, alibuda@...ux.alibaba.com, davem@...emloft.net, edumazet@...gle.com, guwen@...ux.alibaba.com, jaka@...ux.ibm.com, kuba@...nel.org, linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, tonylu@...ux.alibaba.com, wenjia@...ux.ibm.com Subject: [syzbot] [net?] [s390?] general protection fault in smc_diag_dump_proto Hello, syzbot found the following issue on: HEAD commit: d7e78951a8b8 Merge tag 'net-6.11-rc0' of git://git.kernel... git tree: net-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=173cfd3d980000 kernel config: https://syzkaller.appspot.com/x/.config?x=a6f4e2cb79bdcd45 dashboard link: https://syzkaller.appspot.com/bug?extid=f69bfae0a4eb29976e44 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15900a9d980000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1008b645980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/6b22bae2c3c1/disk-d7e78951.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/37db35e4bb64/vmlinux-d7e78951.xz kernel image: https://storage.googleapis.com/syzbot-assets/3e489cf2c28e/bzImage-d7e78951.xz Bisection is inconclusive: the first bad commit could be any of: 5bcd9a0a5995 wifi: brcm80211: remove unused structs f29dcae96ec8 Merge tag 'rtw-next-2024-06-04' of https://github.com/pkshih/rtw bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=17196f19980000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f69bfae0a4eb29976e44@...kaller.appspotmail.com Oops: general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 1 PID: 6338 Comm: syz-executor175 Not tainted 6.10.0-syzkaller-09703-gd7e78951a8b8 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024 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+0x709/0x3270 net/smc/smc_diag.c:217 Code: 08 48 89 df e8 f8 0d 9d f6 48 8b 44 24 28 4c 8d 68 14 48 8b 1b 48 83 c3 0e 48 89 d8 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df <42> 0f b6 04 38 84 c0 0f 85 46 1b 00 00 0f b7 1b 66 c1 c3 08 4c 89 RSP: 0018:ffffc90009d56b00 EFLAGS: 00010203 RAX: 0000000000000001 RBX: 000000000000000e RCX: ffff88807c439e00 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc90009d56f90 R08: ffffffff8990c562 R09: 1ffff11005a1084b R10: dffffc0000000000 R11: ffffed1005a1084c R12: 1ffff11005a108e0 R13: ffff88801f600014 R14: ffff88802d084200 R15: dffffc0000000000 FS: 00007f92fcb0b6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f92fcb0bd58 CR3: 000000002290e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> smc_diag_dump+0x59/0xa0 net/smc/smc_diag.c:236 netlink_dump+0x647/0xd80 net/netlink/af_netlink.c:2325 __netlink_dump_start+0x59f/0x780 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+0x7f0/0x990 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+0xa13/0x10b0 fs/splice.c:889 do_splice_from fs/splice.c:941 [inline] do_splice+0xd77/0x1900 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: 0033:0x7f92fcb924d9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 18 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f92fcb0b218 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007f92fcb0b6c0 RCX: 00007f92fcb924d9 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00007f92fcc1c348 R08: 0000000080000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f92fcc1c340 R13: 00007f92fcbe9074 R14: 00007ffd7bd61c20 R15: 00007ffd7bd61d08 </TASK> 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+0x709/0x3270 net/smc/smc_diag.c:217 Code: 08 48 89 df e8 f8 0d 9d f6 48 8b 44 24 28 4c 8d 68 14 48 8b 1b 48 83 c3 0e 48 89 d8 48 c1 e8 03 49 bf 00 00 00 00 00 fc ff df <42> 0f b6 04 38 84 c0 0f 85 46 1b 00 00 0f b7 1b 66 c1 c3 08 4c 89 RSP: 0018:ffffc90009d56b00 EFLAGS: 00010203 RAX: 0000000000000001 RBX: 000000000000000e RCX: ffff88807c439e00 RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000000 RBP: ffffc90009d56f90 R08: ffffffff8990c562 R09: 1ffff11005a1084b R10: dffffc0000000000 R11: ffffed1005a1084c R12: 1ffff11005a108e0 R13: ffff88801f600014 R14: ffff88802d084200 R15: dffffc0000000000 FS: 00007f92fcb0b6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f92fcb0bd58 CR3: 000000002290e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 08 48 89 or %cl,-0x77(%rax) 3: df e8 fucomip %st(0),%st 5: f8 clc 6: 0d 9d f6 48 8b or $0x8b48f69d,%eax b: 44 24 28 rex.R and $0x28,%al e: 4c 8d 68 14 lea 0x14(%rax),%r13 12: 48 8b 1b mov (%rbx),%rbx 15: 48 83 c3 0e add $0xe,%rbx 19: 48 89 d8 mov %rbx,%rax 1c: 48 c1 e8 03 shr $0x3,%rax 20: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 27: fc ff df * 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 46 1b 00 00 jne 0x1b7d 37: 0f b7 1b movzwl (%rbx),%ebx 3a: 66 c1 c3 08 rol $0x8,%bx 3e: 4c rex.WR 3f: 89 .byte 0x89 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
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