ci starts bisection 2023-01-27 12:38:21.046000954 +0000 UTC m=+408414.992063021 bisecting fixing commit since eb7081409f94a9a8608593d0fb63a1aa3d6f95d8 building syzkaller on 9da37ae85383e0dda5fc114ec808909f72fe038d ensuring issue is reproducible on original commit eb7081409f94a9a8608593d0fb63a1aa3d6f95d8 testing commit eb7081409f94a9a8608593d0fb63a1aa3d6f95d8 gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 699d5ee1827784b6fde49f2492207822e369f68276d0e434934bd12927f41f59 run #0: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #1: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #2: crashed: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() run #3: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #4: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #5: crashed: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() run #6: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #7: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #8: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #9: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #10: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #11: crashed: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() run #12: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #13: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #14: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #15: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #16: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #17: crashed: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() run #18: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #19: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx testing current HEAD 5af6ce7049365952f7f023155234fe091693ead1 testing commit 5af6ce7049365952f7f023155234fe091693ead1 gcc compiler: Debian clang version 13.0.1-6~deb11u1, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: ba28ada54adb12f428a38a51400ba00be872454667208890966db2926f2f77fa run #0: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #1: crashed: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() run #2: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #3: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #4: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #5: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #6: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #7: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #8: crashed: BUG: please report to dccp@vger.kernel.org => prev = NUM, last = NUM at net/dccp/ccids/lib/packet_history.c:LINE/tfrc_rx run #9: crashed: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() revisions tested: 2, total time: 22m37.811115802s (build: 15m30.071182674s, test: 6m19.362588785s) the crash still happens on HEAD commit msg: Merge tag '6.2-rc5-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6 crash: BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:LINE/ccid3_first_li() Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1537/dccp_feat_activate_values() BUG: stored value of X_recv is zero at net/dccp/ccids/ccid3.c:691/ccid3_first_li() CPU: 1 PID: 6174 Comm: syz-executor.0 Not tainted 6.2.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x163/0x220 lib/dump_stack.c:106 ccid3_first_li+0x27b/0x340 net/dccp/ccids/ccid3.c:691 tfrc_lh_interval_add+0x4d3/0x6e0 net/dccp/ccids/lib/loss_interval.c:157 tfrc_rx_handle_loss+0x65f/0x1760 net/dccp/ccids/lib/packet_history.c:328 ccid3_hc_rx_packet_recv+0x27d/0xe40 net/dccp/ccids/ccid3.c:744 ccid_hc_rx_packet_recv net/dccp/ccid.h:182 [inline] dccp_deliver_input_to_ccids net/dccp/input.c:176 [inline] dccp_rcv_established+0x14e/0x250 net/dccp/input.c:374 dccp_v4_do_rcv+0xc0/0x190 net/dccp/ipv4.c:674 sk_backlog_rcv include/net/sock.h:1113 [inline] __sk_receive_skb+0x370/0x880 net/core/sock.c:565 ip_protocol_deliver_rcu+0x66/0xa20 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x20d/0x440 net/ipv4/ip_input.c:233 __netif_receive_skb_one_core net/core/dev.c:5482 [inline] __netif_receive_skb+0x1b3/0x4e0 net/core/dev.c:5596 process_backlog+0x498/0x830 net/core/dev.c:5924 __napi_poll+0x93/0x390 net/core/dev.c:6485 napi_poll net/core/dev.c:6552 [inline] net_rx_action+0x6a2/0xed0 net/core/dev.c:6663 __do_softirq+0x277/0x75b kernel/softirq.c:571 do_softirq+0x161/0x240 kernel/softirq.c:472 __local_bh_enable_ip+0x1b0/0x1f0 kernel/softirq.c:396 rcu_read_unlock_bh include/linux/rcupdate.h:834 [inline] ip_finish_output2+0x99a/0xd60 net/ipv4/ip_output.c:229 dst_output include/net/dst.h:444 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0xf09/0x1b60 net/ipv4/ip_output.c:532 dccp_transmit_skb+0xc47/0x13c0 net/dccp/output.c:138 __dccp_rcv_established+0x205/0x2b0 net/dccp/input.c:346 dccp_rcv_established+0x1ef/0x250 net/dccp/input.c:376 dccp_v4_do_rcv+0xc0/0x190 net/dccp/ipv4.c:674 sk_backlog_rcv include/net/sock.h:1113 [inline] __release_sock+0x194/0x420 net/core/sock.c:2928 release_sock+0x51/0x170 net/core/sock.c:3485 dccp_sendmsg+0x421/0x730 net/dccp/proto.c:790 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x487/0x780 net/socket.c:2476 ___sys_sendmsg net/socket.c:2530 [inline] __sys_sendmmsg+0x32d/0x650 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0x97/0xb0 net/socket.c:2642 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f645c88c189 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f645d65f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f645c9abf80 RCX: 00007f645c88c189 RDX: 000000000000ffc3 RSI: 0000000020001e80 RDI: 0000000000000006 RBP: 00007f645c8e7b01 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc7517b69f R14: 00007f645d65f300 R15: 0000000000022000 Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1537/dccp_feat_activate_values() Negotiation of local Allow Short Seqnos failed in state CHANGING at net/dccp/feat.c:1537/dccp_feat_activate_values()