ci starts bisection 2023-01-24 18:24:57.462566071 +0000 UTC m=+170011.408628134 bisecting fixing commit since a6afa4199d3d038fbfdff5511f7523b0e30cb774 building syzkaller on aea5da898f473385f3b66c94f8aa49ca9a1c9744 ensuring issue is reproducible on original commit a6afa4199d3d038fbfdff5511f7523b0e30cb774 testing commit a6afa4199d3d038fbfdff5511f7523b0e30cb774 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 05768e0cded85aa178465147e6ddf47eccc2bb2071a8514493a14cdfed69b064 all runs: crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval() testing current HEAD 948ef7bb70c4acaf74d87420ea3a1190862d4548 testing commit 948ef7bb70c4acaf74d87420ea3a1190862d4548 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 30b824b52ec82e93bbd85b4faffaaad8b7c69df27faf389d9297e0157b3e3e7e all runs: crashed: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval() revisions tested: 2, total time: 20m50.918604818s (build: 13m55.245826508s, test: 6m8.615346138s) the crash still happens on HEAD commit msg: Merge tag 'modules-6.2-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux crash: BUG: "hc->tx_t_ipi == NUM" holds (exception!) at net/dccp/ccids/ccid3.c:LINE/ccid3_update_send_interval() BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() CPU: 0 PID: 6455 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+0x57/0x7d lib/dump_stack.c:106 ccid3_hc_tx_update_s net/dccp/ccids/ccid3.c:169 [inline] ccid3_hc_tx_packet_sent+0xda/0x110 net/dccp/ccids/ccid3.c:353 ccid_hc_tx_packet_sent net/dccp/ccid.h:175 [inline] dccp_xmit_packet+0x28a/0x660 net/dccp/output.c:289 dccp_write_xmit+0x10e/0x180 net/dccp/output.c:366 dccp_sendmsg+0x820/0xb20 net/dccp/proto.c:788 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:734 ____sys_sendmsg+0x397/0x8a0 net/socket.c:2476 ___sys_sendmsg+0xdb/0x160 net/socket.c:2530 __sys_sendmmsg+0x13a/0x300 net/socket.c:2616 __do_sys_sendmmsg net/socket.c:2645 [inline] __se_sys_sendmmsg net/socket.c:2642 [inline] __x64_sys_sendmmsg+0x94/0x100 net/socket.c:2642 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+0x63/0xcd RIP: 0033:0x7fbeef28a5a9 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:00007fbef031a168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007fbeef3abf80 RCX: 00007fbeef28a5a9 RDX: 0000000000000001 RSI: 0000000020001e80 RDI: 0000000000000004 RBP: 00007fbeef2e5580 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff5f01e69f R14: 00007fbef031a300 R15: 0000000000022000