./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1985305095 <...> Warning: Permanently added '10.128.0.99' (ED25519) to the list of known hosts. execve("./syz-executor1985305095", ["./syz-executor1985305095"], 0x7ffed2da2970 /* 10 vars */) = 0 brk(NULL) = 0x555561963000 brk(0x555561963d40) = 0x555561963d40 arch_prctl(ARCH_SET_FS, 0x5555619633c0) = 0 set_tid_address(0x555561963690) = 5021 set_robust_list(0x5555619636a0, 24) = 0 rseq(0x555561963ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1985305095", 4096) = 28 getrandom("\x6e\x83\x28\x70\x2c\xe5\xf9\xc4", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555561963d40 brk(0x555561984d40) = 0x555561984d40 brk(0x555561985000) = 0x555561985000 mprotect(0x7f0223c02000, 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 5022 attached , child_tidptr=0x555561963690) = 5022 [pid 5022] set_robust_list(0x5555619636a0, 24) = 0 [pid 5022] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5022] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5022] setsid() = 1 [pid 5022] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5022] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5022] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5022] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5022] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5022] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5022] unshare(CLONE_NEWNS) = 0 [pid 5022] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5022] unshare(CLONE_NEWIPC) = 0 [pid 5022] unshare(CLONE_NEWCGROUP) = 0 [pid 5022] unshare(CLONE_NEWUTS) = 0 [pid 5022] unshare(CLONE_SYSVSEM) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "16777216", 8) = 8 [pid 5022] close(3) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "536870912", 9) = 9 [pid 5022] close(3) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "1024", 4) = 4 [pid 5022] close(3) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "8192", 4) = 4 [pid 5022] close(3) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "1024", 4) = 4 [pid 5022] close(3) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "1024", 4) = 4 [pid 5022] close(3) = 0 [pid 5022] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5022] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5022] close(3) = 0 [pid 5022] getpid() = 1 [pid 5022] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< {parent_tid=[3]}, 88) = 3 ./strace-static-x86_64: Process 5050 attached [pid 5049] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5049] futex(0x7f0223c08408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5049] futex(0x7f0223c0840c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5050] rseq(0x7f0223b35fe0, 0x20, 0, 0x53053053) = 0 [pid 5050] set_robust_list(0x7f0223b359a0, 24) = 0 [pid 5050] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5050] socket(AF_CAN, SOCK_RAW, CAN_RAW) = 3 [pid 5050] futex(0x7f0223c0840c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5050] futex(0x7f0223c08408, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] <... futex resumed>) = 0 [pid 5050] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5049] futex(0x7f0223c08408, FUTEX_WAKE_PRIVATE, 1000000 [pid 5050] bind(3, {sa_family=AF_CAN, sa_data="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"}, 16) = 0 [pid 5049] <... futex resumed>) = 0 [pid 5050] futex(0x7f0223c0840c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5049] futex(0x7f0223c0840c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5050] <... futex resumed>) = 0 [pid 5049] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5050] recvmmsg(3, [pid 5049] futex(0x7f0223c08408, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5049] futex(0x7f0223c0840c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5049] futex(0x7f0223c0841c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5049] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f0223af4000 [pid 5049] mprotect(0x7f0223af5000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5049] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5049] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f0223b14990, parent_tid=0x7f0223b14990, exit_signal=0, stack=0x7f0223af4000, stack_size=0x20300, tls=0x7f0223b146c0}./strace-static-x86_64: Process 5051 attached [pid 5051] rseq(0x7f0223b14fe0, 0x20, 0, 0x53053053) = 0 [pid 5049] <... clone3 resumed> => {parent_tid=[4]}, 88) = 4 [pid 5051] set_robust_list(0x7f0223b149a0, 24 [pid 5049] rt_sigprocmask(SIG_SETMASK, [], [pid 5051] <... set_robust_list resumed>) = 0 [pid 5051] rt_sigprocmask(SIG_SETMASK, [], [pid 5049] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5051] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5049] futex(0x7f0223c08418, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] socket(AF_CAN, SOCK_DGRAM, CAN_J1939) = 4 [pid 5049] <... futex resumed>) = 0 [pid 5051] futex(0x7f0223c0841c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5049] futex(0x7f0223c0841c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5051] <... futex resumed>) = 0 [pid 5049] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5051] futex(0x7f0223c08418, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] futex(0x7f0223c08418, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5049] <... futex resumed>) = 0 [pid 5051] ioctl(4, SIOCGIFINDEX, {ifr_name="vxcan0" [pid 5049] futex(0x7f0223c0841c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5051] <... ioctl resumed>, ifr_ifindex=20}) = 0 [pid 5051] futex(0x7f0223c0841c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5049] <... futex resumed>) = 0 [pid 5049] futex(0x7f0223c08418, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] bind(4, {sa_family=AF_CAN, sa_data="\x00\x00\x14\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"}, 24 [pid 5049] <... futex resumed>) = 0 [pid 5051] <... bind resumed>) = 0 [pid 5049] futex(0x7f0223c0841c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5051] futex(0x7f0223c0841c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5049] <... futex resumed>) = 0 [pid 5051] futex(0x7f0223c08418, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] futex(0x7f0223c08418, FUTEX_WAKE_PRIVATE, 1000000 [pid 5051] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5049] <... futex resumed>) = 0 [pid 5051] sendmsg(4, {msg_name={sa_family=AF_CAN, sa_data="\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"}, msg_namelen=24, msg_iov=[{iov_base="\x10", iov_len=1}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0 [pid 5049] futex(0x7f0223c0841c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5051] <... sendmsg resumed>) = 1 [pid 5051] futex(0x7f0223c0841c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5049] <... futex resumed>) = 0 [ 162.057936][ T5050] ===================================================== [ 162.065345][ T5050] BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 [ 162.072994][ T5050] _copy_to_iter+0x366/0x2520 [ 162.077853][ T5050] raw_recvmsg+0x2b8/0x9e0 [ 162.082672][ T5050] sock_recvmsg+0x2c4/0x340 [ 162.087397][ T5050] ____sys_recvmsg+0x18a/0x620 [ 162.092510][ T5050] ___sys_recvmsg+0x223/0x840 [ 162.097368][ T5050] do_recvmmsg+0x4fc/0xfd0 [ 162.102092][ T5050] __x64_sys_recvmmsg+0x397/0x490 [ 162.107280][ T5050] x64_sys_call+0xf6c/0x3b50 [ 162.112129][ T5050] do_syscall_64+0xcf/0x1e0 [ 162.116824][ T5050] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.123084][ T5050] [ 162.125593][ T5050] Uninit was created at: [ 162.130105][ T5050] kmem_cache_alloc_node+0x613/0xc50 [ 162.135732][ T5050] kmalloc_reserve+0x13d/0x4a0 [ 162.140721][ T5050] __alloc_skb+0x35b/0x7a0 [ 162.145600][ T5050] alloc_skb_with_frags+0xc8/0xbf0 [ 162.150950][ T5050] sock_alloc_send_pskb+0xa81/0xbf0 [ 162.156608][ T5050] j1939_sk_sendmsg+0xc0a/0x2730 [ 162.161841][ T5050] __sock_sendmsg+0x30f/0x380 [ 162.166715][ T5050] ____sys_sendmsg+0x877/0xb60 [ 162.171940][ T5050] ___sys_sendmsg+0x28d/0x3c0 [ 162.176883][ T5050] __x64_sys_sendmsg+0x307/0x4a0 [ 162.182146][ T5050] x64_sys_call+0xc4b/0x3b50 [ 162.186944][ T5050] do_syscall_64+0xcf/0x1e0 [ 162.191741][ T5050] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.197882][ T5050] [ 162.200297][ T5050] Bytes 12-15 of 16 are uninitialized [ 162.205966][ T5050] Memory access of size 16 starts at ffff888120969690 [ 162.213370][ T5050] Data copied to user address 00000000200017c0 [ 162.219643][ T5050] [ 162.222197][ T5050] CPU: 1 PID: 5050 Comm: syz-executor198 Not tainted 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0 [ 162.232953][ T5050] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 162.243315][ T5050] ===================================================== [ 162.250368][ T5050] Disabling lock debugging due to kernel taint [ 162.256752][ T5050] Kernel panic - not syncing: kmsan.panic set ... [ 162.263299][ T5050] CPU: 1 PID: 5050 Comm: syz-executor198 Tainted: G B 6.9.0-rc5-syzkaller-00031-g71b1543c83d6 #0 [ 162.275658][ T5050] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 162.285960][ T5050] Call Trace: [ 162.289354][ T5050] [ 162.292406][ T5050] dump_stack_lvl+0x216/0x2d0 [ 162.297253][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.303292][ T5050] dump_stack+0x1e/0x30 [pid 5051] futex(0x7f0223c08418, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5049] close(3) = 0 [pid 5049] close(4) = 0 [pid 5049] close(5) = -1 EBADF (Bad file descriptor) [pid 5049] close(6) = -1 EBADF (Bad file descriptor) [pid 5049] close(7) = -1 EBADF (Bad file descriptor) [pid 5049] close(8) = -1 EBADF (Bad file descriptor) [pid 5049] close(9) = -1 EBADF (Bad file descriptor) [pid 5049] close(10) = -1 EBADF (Bad file descriptor) [pid 5049] close(11) = -1 EBADF (Bad file descriptor) [pid 5049] close(12) = -1 EBADF (Bad file descriptor) [pid 5049] close(13) = -1 EBADF (Bad file descriptor) [pid 5049] close(14) = -1 EBADF (Bad file descriptor) [pid 5049] close(15) = -1 EBADF (Bad file descriptor) [pid 5049] close(16) = -1 EBADF (Bad file descriptor) [pid 5049] close(17) = -1 EBADF (Bad file descriptor) [pid 5049] close(18) = -1 EBADF (Bad file descriptor) [pid 5049] close(19) = -1 EBADF (Bad file descriptor) [pid 5049] close(20) = -1 EBADF (Bad file descriptor) [pid 5049] close(21) = -1 EBADF (Bad file descriptor) [pid 5049] close(22) = -1 EBADF (Bad file descriptor) [pid 5049] close(23) = -1 EBADF (Bad file descriptor) [pid 5049] close(24) = -1 EBADF (Bad file descriptor) [pid 5049] close(25) = -1 EBADF (Bad file descriptor) [pid 5049] close(26) = -1 EBADF (Bad file descriptor) [pid 5049] close(27) = -1 EBADF (Bad file descriptor) [ 162.307637][ T5050] panic+0x4e2/0xcd0 [ 162.311727][ T5050] ? kmsan_get_metadata+0x101/0x1d0 [ 162.317241][ T5050] kmsan_report+0x2d5/0x2e0 [ 162.321938][ T5050] ? finish_task_switch+0x1c8/0x8f0 [ 162.327359][ T5050] ? kmsan_internal_check_memory+0x48c/0x560 [ 162.333586][ T5050] ? kmsan_copy_to_user+0xd5/0xf0 [ 162.338862][ T5050] ? _copy_to_iter+0x366/0x2520 [ 162.343998][ T5050] ? raw_recvmsg+0x2b8/0x9e0 [ 162.348832][ T5050] ? sock_recvmsg+0x2c4/0x340 [ 162.353729][ T5050] ? ____sys_recvmsg+0x18a/0x620 [ 162.358862][ T5050] ? ___sys_recvmsg+0x223/0x840 [ 162.363891][ T5050] ? do_recvmmsg+0x4fc/0xfd0 [ 162.368651][ T5050] ? __x64_sys_recvmmsg+0x397/0x490 [ 162.374026][ T5050] ? x64_sys_call+0xf6c/0x3b50 [ 162.379008][ T5050] ? do_syscall_64+0xcf/0x1e0 [ 162.383852][ T5050] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.390210][ T5050] ? __schedule+0x22df/0x6bc0 [ 162.395078][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.401057][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.406421][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.412396][ T5050] ? _raw_spin_lock_irqsave+0x35/0xc0 [ 162.417978][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.423338][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.428712][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.434699][ T5050] ? _raw_spin_lock_irqsave+0x35/0xc0 [ 162.440278][ T5050] ? filter_irq_stacks+0x60/0x1a0 [ 162.445504][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.451296][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.456660][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.462746][ T5050] kmsan_internal_check_memory+0x48c/0x560 [ 162.468785][ T5050] kmsan_copy_to_user+0xd5/0xf0 [ 162.473843][ T5050] ? should_fail_usercopy+0x2e/0x40 [ 162.479249][ T5050] _copy_to_iter+0x366/0x2520 [ 162.484095][ T5050] ? __pfx_sk_busy_loop_end+0x10/0x10 [ 162.489773][ T5050] ? kmsan_get_metadata+0x101/0x1d0 [ 162.495143][ T5050] raw_recvmsg+0x2b8/0x9e0 [ 162.499780][ T5050] ? __pfx_raw_recvmsg+0x10/0x10 [ 162.504921][ T5050] ? __pfx_raw_recvmsg+0x10/0x10 [ 162.510056][ T5050] sock_recvmsg+0x2c4/0x340 [ 162.514760][ T5050] ____sys_recvmsg+0x18a/0x620 [ 162.519694][ T5050] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 162.525724][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.531887][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.537348][ T5050] ___sys_recvmsg+0x223/0x840 [ 162.542316][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.547770][ T5050] ? kmsan_get_shadow_origin_ptr+0x4d/0xb0 [ 162.553758][ T5050] do_recvmmsg+0x4fc/0xfd0 [ 162.558341][ T5050] ? jump_label_init_type+0x100/0x140 [ 162.563916][ T5050] ? _raw_spin_unlock_irqrestore+0x3f/0x60 [ 162.569928][ T5050] ? stack_depot_save_flags+0x66d/0x6e0 [ 162.575668][ T5050] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 162.582586][ T5050] ? x64_sys_call+0xf6c/0x3b50 [ 162.587555][ T5050] __x64_sys_recvmmsg+0x397/0x490 [ 162.592768][ T5050] ? kmsan_get_metadata+0x146/0x1d0 [ 162.598142][ T5050] x64_sys_call+0xf6c/0x3b50 [ 162.602927][ T5050] do_syscall_64+0xcf/0x1e0 [ 162.607598][ T5050] ? clear_bhb_loop+0x25/0x80 [ 162.612451][ T5050] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 162.618664][ T5050] RIP: 0033:0x7f0223b7e519 [ 162.623257][ T5050] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 1a 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 [ 162.643075][ T5050] RSP: 002b:00007f0223b35238 EFLAGS: 00000246 ORIG_RAX: 000000000000012b [ 162.651663][ T5050] RAX: ffffffffffffffda RBX: 00007f0223c08408 RCX: 00007f0223b7e519 [ 162.659871][ T5050] RDX: 0000000000000001 RSI: 0000000020003080 RDI: 0000000000000003 [ 162.667986][ T5050] RBP: 00007f0223c08400 R08: 0000000000000000 R09: 00007f0223b356c0 [ 162.676185][ T5050] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0223bd54f4 [ 162.684316][ T5050] R13: 0000000000000013 R14: 00007ffdc751f160 R15: 00007ffdc751f248 [ 162.692463][ T5050] [ 162.695917][ T5050] Kernel Offset: disabled [ 162.700318][ T5050] Rebooting in 86400 seconds..