./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor409030475 <...> Warning: Permanently added '10.128.1.59' (ECDSA) to the list of known hosts. execve("./syz-executor409030475", ["./syz-executor409030475"], 0x7ffe16d85690 /* 10 vars */) = 0 brk(NULL) = 0x555555f8c000 brk(0x555555f8cc40) = 0x555555f8cc40 arch_prctl(ARCH_SET_FS, 0x555555f8c300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor409030475", 4096) = 27 brk(0x555555fadc40) = 0x555555fadc40 brk(0x555555fae000) = 0x555555fae000 mprotect(0x7fdedd632000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 3612 attached , child_tidptr=0x555555f8c5d0) = 3612 [pid 3612] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 3612] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 3612] setsid() = 1 [pid 3612] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 3612] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 3612] unshare(CLONE_NEWNS) = 0 [pid 3612] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 3612] unshare(CLONE_NEWIPC) = 0 [pid 3612] unshare(CLONE_NEWCGROUP) = 0 [pid 3612] unshare(CLONE_NEWUTS) = 0 [pid 3612] unshare(CLONE_SYSVSEM) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "16777216", 8) = 8 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "536870912", 9) = 9 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "8192", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024", 4) = 4 [pid 3612] close(3) = 0 [pid 3612] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 3612] write(3, "1024 1048576 500 1024", 21) = 21 [pid 3612] close(3) = 0 [pid 3612] getpid() = 1 [pid 3612] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 39.501817][ T3612] CPU: 0 PID: 3612 Comm: syz-executor409 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0 [ 39.511953][ T3612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 39.521986][ T3612] Call Trace: [ 39.525307][ T3612] [ 39.528220][ T3612] dump_stack_lvl+0xcd/0x134 [ 39.532793][ T3612] ccid3_update_send_interval.cold+0x87/0x93 [ 39.538762][ T3612] ccid3_hc_tx_packet_sent+0x12e/0x160 [ 39.544288][ T3612] ? ccid3_update_send_interval+0x120/0x120 [ 39.550161][ T3612] dccp_xmit_packet+0x2f2/0x740 [ 39.554994][ T3612] dccp_write_xmit+0x16d/0x1d0 [ 39.559732][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.564752][ T3612] dccp_sendmsg+0xa80/0xca0 [ 39.569247][ T3612] ? trace_event_raw_event_dccp_probe+0xd90/0xd90 [ 39.575653][ T3612] ? aa_af_perm+0x230/0x230 [ 39.580146][ T3612] ? __import_iovec+0x1f7/0x610 [ 39.584988][ T3612] inet_sendmsg+0x99/0xe0 [ 39.589309][ T3612] ? inet_send_prepare+0x4e0/0x4e0 [ 39.594409][ T3612] sock_sendmsg+0xcf/0x120 [ 39.598821][ T3612] ____sys_sendmsg+0x334/0x8c0 [ 39.603583][ T3612] ? copy_msghdr_from_user+0xfc/0x150 [ 39.608943][ T3612] ? kernel_sendmsg+0x50/0x50 [ 39.613621][ T3612] ___sys_sendmsg+0x110/0x1b0 [ 39.618286][ T3612] ? do_recvmmsg+0x6e0/0x6e0 [ 39.622867][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.627887][ T3612] ? finish_task_switch.isra.0+0x2b5/0xc70 [ 39.633689][ T3612] ? finish_task_switch.isra.0+0x2bf/0xc70 [ 39.639496][ T3612] ? __switch_to+0x5cc/0x1050 [ 39.644172][ T3612] ? __switch_to_asm+0x3a/0x60 [ 39.648929][ T3612] ? __schedule+0xae7/0x52b0 [ 39.653511][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.658545][ T3612] ? __fget_light+0x20a/0x270 [ 39.663213][ T3612] __sys_sendmmsg+0x18b/0x460 [ 39.667885][ T3612] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 39.672908][ T3612] ? ptrace_stop.part.0+0x746/0xa80 [ 39.678100][ T3612] ? rcu_read_lock_sched_held+0xd/0x70 [ 39.683567][ T3612] ? lock_release+0x560/0x780 [ 39.688230][ T3612] ? ptrace_notify+0xfa/0x140 [ 39.692892][ T3612] ? lock_downgrade+0x6e0/0x6e0 [ 39.697728][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.702751][ T3612] __x64_sys_sendmmsg+0x99/0x100 [ 39.707674][ T3612] do_syscall_64+0x35/0xb0 [ 39.712086][ T3612] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 39.718054][ T3612] RIP: 0033:0x7fdedd5be639 [ 39.722454][ T3612] Code: 28 c3 e8 4a 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 [ 39.742219][ T3612] RSP: 002b:00007ffd26373258 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 39.750619][ T3612] RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007fdedd5be639 [ 39.758576][ T3612] RDX: 0000000000000001 RSI: 0000000020001e80 RDI: 0000000000000004 [ 39.766531][ T3612] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [ 39.774493][ T3612] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd26373270 [ 39.782450][ T3612] R13: 00007ffd26373290 R14: 0000000000000000 R15: 0000000000000000 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [ 39.790408][ T3612] [ 39.795683][ T3612] BUG: "hc->tx_t_ipi == 0" holds (exception!) at net/dccp/ccids/ccid3.c:90/ccid3_update_send_interval() [ 39.808574][ T3612] CPU: 1 PID: 3612 Comm: syz-executor409 Not tainted 6.0.0-syzkaller-09039-ga6afa4199d3d #0 [ 39.818891][ T3612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 [ 39.828927][ T3612] Call Trace: [ 39.832190][ T3612] [ 39.835102][ T3612] dump_stack_lvl+0xcd/0x134 [ 39.839674][ T3612] ccid3_update_send_interval.cold+0x87/0x93 [ 39.845648][ T3612] ccid3_hc_tx_packet_sent+0x12e/0x160 [ 39.851161][ T3612] ? ccid3_update_send_interval+0x120/0x120 [ 39.857131][ T3612] dccp_xmit_packet+0x2f2/0x740 [ 39.861961][ T3612] dccp_write_xmit+0x16d/0x1d0 [ 39.866700][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.871714][ T3612] dccp_sendmsg+0xa80/0xca0 [ 39.876199][ T3612] ? trace_event_raw_event_dccp_probe+0xd90/0xd90 [ 39.882597][ T3612] ? aa_af_perm+0x230/0x230 [ 39.887088][ T3612] ? __import_iovec+0x1f7/0x610 [ 39.891926][ T3612] inet_sendmsg+0x99/0xe0 [ 39.896241][ T3612] ? inet_send_prepare+0x4e0/0x4e0 [ 39.901335][ T3612] sock_sendmsg+0xcf/0x120 [ 39.905735][ T3612] ____sys_sendmsg+0x334/0x8c0 [ 39.910481][ T3612] ? copy_msghdr_from_user+0xfc/0x150 [ 39.915834][ T3612] ? kernel_sendmsg+0x50/0x50 [ 39.920512][ T3612] ___sys_sendmsg+0x110/0x1b0 [ 39.925183][ T3612] ? do_recvmmsg+0x6e0/0x6e0 [ 39.929760][ T3612] ? lock_release+0x560/0x780 [ 39.934430][ T3612] ? finish_task_switch.isra.0+0x2b0/0xc70 [ 39.940236][ T3612] ? vtime_account_system+0x2c6/0x530 [ 39.945602][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.950800][ T3612] ? finish_task_switch.isra.0+0x2b5/0xc70 [ 39.956742][ T3612] ? __switch_to+0x5cc/0x1050 [ 39.961420][ T3612] ? __switch_to_asm+0x3a/0x60 [ 39.966181][ T3612] ? __schedule+0xae7/0x52b0 [ 39.970763][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 39.975868][ T3612] ? __fget_light+0x20a/0x270 [ 39.980532][ T3612] __sys_sendmmsg+0x18b/0x460 [ 39.985199][ T3612] ? __ia32_sys_sendmsg+0xb0/0xb0 [ 39.990231][ T3612] ? ptrace_stop.part.0+0x746/0xa80 [ 39.995507][ T3612] ? rcu_read_lock_sched_held+0xd/0x70 [ 40.000964][ T3612] ? lock_release+0x560/0x780 [ 40.005627][ T3612] ? ptrace_notify+0xfa/0x140 [ 40.010288][ T3612] ? lock_downgrade+0x6e0/0x6e0 [ 40.015126][ T3612] ? trace_hardirqs_on+0x2d/0x120 [ 40.020148][ T3612] __x64_sys_sendmmsg+0x99/0x100 [ 40.025075][ T3612] do_syscall_64+0x35/0xb0 [ 40.029499][ T3612] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 40.035385][ T3612] RIP: 0033:0x7fdedd5be639 [ 40.039785][ T3612] Code: 28 c3 e8 4a 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 [ 40.059384][ T3612] RSP: 002b:00007ffd26373258 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 [ 40.067874][ T3612] RAX: ffffffffffffffda RBX: 0000000000000010 RCX: 00007fdedd5be639 [ 40.075829][ T3612] RDX: 0000000000000001 RSI: 0000000020001e80 RDI: 0000000000000004 [ 40.083785][ T3612] RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] sendmmsg(4, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, msg_len=1}], 1, 0) = 1 [pid 3612] exit_group(1) = ? [pid 3612] +++ exited with 1 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=3612, si_uid=0, si_status=1, si_utime=1, si_stime=129} --- exit_group(0) = ? +++ exited with 0 +++ [ 40.091740