Hello, syzbot found the following issue on: HEAD commit: d82a6c5ef9dc net: prestera: acl: make read-only array clie.. git tree: net-next console output: https://syzkaller.appspot.com/x/log.txt?x=13862081700000 kernel config: https://syzkaller.appspot.com/x/.config?x=cce8a73d5200f3c0 dashboard link: https://syzkaller.appspot.com/bug?extid=03e3e228510223dabd34 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167da879700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12bb0fe1700000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11116ca1700000 final oops: https://syzkaller.appspot.com/x/report.txt?x=13116ca1700000 console output: https://syzkaller.appspot.com/x/log.txt?x=15116ca1700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+03e3e228510223dabd34@xxxxxxxxxxxxxxxxxxxxxxxxx infiniband syz: set active infiniband syz: added veth0_vlan RDS/IB: syz: added smc: adding ib device syz with port count 1 smc: ib device syz port 1 has pnetid general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057] CPU: 1 PID: 3592 Comm: syz-executor235 Not tainted 5.17.0-rc6-syzkaller-01979-gd82a6c5ef9dc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:dev_name include/linux/device.h:636 [inline] RIP: 0010:smc_pnet_find_ib net/smc/smc_pnet.c:314 [inline] RIP: 0010:smc_pnet_add_ib net/smc/smc_pnet.c:416 [inline] RIP: 0010:smc_pnet_enter net/smc/smc_pnet.c:515 [inline] RIP: 0010:smc_pnet_add+0xc4b/0x17a0 net/smc/smc_pnet.c:558 Code: 8d be 58 07 00 00 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 40 09 00 00 4d 8b a6 58 07 00 00 49 8d 7c 24 50 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 19 09 00 00 4d 8b 74 24 50 4d 85 f6 0f 85 21 ff RSP: 0018:ffffc9000399f540 EFLAGS: 00010206 RAX: 000000000000000a RBX: ffff888076902800 RCX: 0000000000000000 RDX: ffff8880226f0000 RSI: ffffffff88cadba0 RDI: 0000000000000050 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffc9000399f47f R10: ffffffff88cadb92 R11: 1ffffffff1eb5307 R12: 0000000000000000 R13: ffff88807066cc18 R14: ffff88801abc4000 R15: ffff888076902810 FS: 0000555555e61300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056492c9e2ff8 CR3: 0000000018900000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:792 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494 genl_rcv+0x24/0x40 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1317 [inline] netlink_unicast+0x539/0x7e0 net/netlink/af_netlink.c:1343 netlink_sendmsg+0x904/0xe00 net/netlink/af_netlink.c:1919 sock_sendmsg_nosec net/socket.c:705 [inline] sock_sendmsg+0xcf/0x120 net/socket.c:725 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2413 ___sys_sendmsg+0xf3/0x170 net/socket.c:2467 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2496 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f02fa3ae5d9 Code: 28 c3 e8 7a 15 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:00007ffd0d649788 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f02fa3ae5d9 RDX: 0000000000000000 RSI: 0000000020000280 RDI: 0000000000000005 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000555555e612c0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dev_name include/linux/device.h:636 [inline] RIP: 0010:smc_pnet_find_ib net/smc/smc_pnet.c:314 [inline] RIP: 0010:smc_pnet_add_ib net/smc/smc_pnet.c:416 [inline] RIP: 0010:smc_pnet_enter net/smc/smc_pnet.c:515 [inline] RIP: 0010:smc_pnet_add+0xc4b/0x17a0 net/smc/smc_pnet.c:558 Code: 8d be 58 07 00 00 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 40 09 00 00 4d 8b a6 58 07 00 00 49 8d 7c 24 50 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 19 09 00 00 4d 8b 74 24 50 4d 85 f6 0f 85 21 ff RSP: 0018:ffffc9000399f540 EFLAGS: 00010206 RAX: 000000000000000a RBX: ffff888076902800 RCX: 0000000000000000 RDX: ffff8880226f0000 RSI: ffffffff88cadba0 RDI: 0000000000000050 RBP: dffffc0000000000 R08: 0000000000000000 R09: ffffc9000399f47f R10: ffffffff88cadb92 R11: 1ffffffff1eb5307 R12: 0000000000000000 R13: ffff88807066cc18 R14: ffff88801abc4000 R15: ffff888076902810 FS: 0000555555e61300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056492c9f13a8 CR3: 0000000018900000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d be 58 07 00 00 lea 0x758(%rsi),%edi 6: 48 89 f8 mov %rdi,%rax 9: 48 c1 e8 03 shr $0x3,%rax d: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) 11: 0f 85 40 09 00 00 jne 0x957 17: 4d 8b a6 58 07 00 00 mov 0x758(%r14),%r12 1e: 49 8d 7c 24 50 lea 0x50(%r12),%rdi 23: 48 89 f8 mov %rdi,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 80 3c 28 00 cmpb $0x0,(%rax,%rbp,1) <-- trapping instruction 2e: 0f 85 19 09 00 00 jne 0x94d 34: 4d 8b 74 24 50 mov 0x50(%r12),%r14 39: 4d 85 f6 test %r14,%r14 3c: 0f .byte 0xf 3d: 85 21 test %esp,(%rcx) 3f: ff .byte 0xff --- 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
