Hello, syzbot found the following issue on: HEAD commit: 0c337952 Merge tag 'wireless-drivers-next-2021-06-16' of g.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=1621de10300000 kernel config: https://syzkaller.appspot.com/x/.config?x=a6380da8984033f1 dashboard link: https://syzkaller.appspot.com/bug?extid=5dda108b672b54141857 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121d2d20300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=100bd768300000 The issue was bisected to: commit f9006acc8dfe59e25aa75729728ac57a8d84fc32 Author: Florian Westphal <fw@xxxxxxxxx> Date: Wed Apr 21 07:51:08 2021 +0000 netfilter: arp_tables: pass table pointer via nf_hook_ops bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12600fffd00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=11600fffd00000 console output: https://syzkaller.appspot.com/x/log.txt?x=16600fffd00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+5dda108b672b54141857@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: f9006acc8dfe ("netfilter: arp_tables: pass table pointer via nf_hook_ops") general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 1 PID: 8455 Comm: syz-executor893 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:smc_tx_sendmsg+0x204/0x1ba0 net/smc/smc_tx.c:157 Code: 48 c1 ea 03 80 3c 02 00 0f 85 8b 17 00 00 49 8b 9d 08 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8f 17 00 00 48 63 5b 20 4c 8b RSP: 0018:ffffc9000164f800 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff889cd6ae RDI: 0000000000000020 RBP: ffff88801cf58000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff889cd6a1 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801cf58000 R14: ffffc9000164fd90 R15: ffff88801cf58060 FS: 0000000000ebf300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd43ca1328 CR3: 000000002acf2000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smc_sendmsg+0x274/0x5b0 net/smc/af_smc.c:2037 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:674 ____sys_sendmsg+0x331/0x810 net/socket.c:2350 ___sys_sendmsg+0xf3/0x170 net/socket.c:2404 __sys_sendmmsg+0x195/0x470 net/socket.c:2490 __do_sys_sendmmsg net/socket.c:2519 [inline] __se_sys_sendmmsg net/socket.c:2516 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2516 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x43ee89 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc82b20a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043ee89 RDX: 0000000000000001 RSI: 0000000020003d80 RDI: 0000000000000003 RBP: 0000000000402e70 R08: 0000000000000000 R09: 0000000000400488 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000402f00 R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488 Modules linked in: ---[ end trace 459b28282ae53115 ]--- RIP: 0010:smc_tx_sendmsg+0x204/0x1ba0 net/smc/smc_tx.c:157 Code: 48 c1 ea 03 80 3c 02 00 0f 85 8b 17 00 00 49 8b 9d 08 05 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d 7b 20 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 8f 17 00 00 48 63 5b 20 4c 8b RSP: 0018:ffffc9000164f800 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000004 RSI: ffffffff889cd6ae RDI: 0000000000000020 RBP: ffff88801cf58000 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff889cd6a1 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801cf58000 R14: ffffc9000164fd90 R15: ffff88801cf58060 FS: 0000000000ebf300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055b7501be298 CR3: 000000002acf2000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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@xxxxxxxxxxxxxxxx. 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 syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
