./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2893184398 <...> Warning: Permanently added '10.128.1.57' (ED25519) to the list of known hosts. execve("./syz-executor2893184398", ["./syz-executor2893184398"], 0x7ffdefe12030 /* 10 vars */) = 0 brk(NULL) = 0x555582a52000 brk(0x555582a52d00) = 0x555582a52d00 arch_prctl(ARCH_SET_FS, 0x555582a52380) = 0 set_tid_address(0x555582a52650) = 5069 set_robust_list(0x555582a52660, 24) = 0 rseq(0x555582a52ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2893184398", 4096) = 28 getrandom("\x99\x9b\xd7\x74\x68\x1f\x53\x5d", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555582a52d00 brk(0x555582a73d00) = 0x555582a73d00 brk(0x555582a74000) = 0x555582a74000 mprotect(0x7f7d0f8e5000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555582a52650) = 5070 ./strace-static-x86_64: Process 5070 attached [pid 5069] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5070] set_robust_list(0x555582a52660, 24) = 0 ./strace-static-x86_64: Process 5071 attached [pid 5070] mkdir("./syzkaller.YhTf3X", 0700 [pid 5069] <... clone resumed>, child_tidptr=0x555582a52650) = 5071 [pid 5071] set_robust_list(0x555582a52660, 24) = 0 [pid 5071] mkdir("./syzkaller.T9yXfl", 0700 [pid 5070] <... mkdir resumed>) = 0 [pid 5069] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5071] <... mkdir resumed>) = 0 ./strace-static-x86_64: Process 5072 attached [pid 5069] <... clone resumed>, child_tidptr=0x555582a52650) = 5072 [pid 5070] chmod("./syzkaller.YhTf3X", 0777 [pid 5069] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5072] set_robust_list(0x555582a52660, 24 [pid 5071] chmod("./syzkaller.T9yXfl", 0777 [pid 5070] <... chmod resumed>) = 0 [pid 5071] <... chmod resumed>) = 0 [pid 5070] chdir("./syzkaller.YhTf3X"./strace-static-x86_64: Process 5073 attached [pid 5072] <... set_robust_list resumed>) = 0 [pid 5071] chdir("./syzkaller.T9yXfl" [pid 5070] <... chdir resumed>) = 0 [pid 5069] <... clone resumed>, child_tidptr=0x555582a52650) = 5073 [pid 5073] set_robust_list(0x555582a52660, 24 [pid 5072] mkdir("./syzkaller.GqG6xl", 0700 [pid 5071] <... chdir resumed>) = 0 [pid 5070] mkdir("./0", 0777 [pid 5069] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5073] <... set_robust_list resumed>) = 0 [pid 5071] mkdir("./0", 0777 [pid 5073] mkdir("./syzkaller.4RTVkk", 0700./strace-static-x86_64: Process 5074 attached [pid 5071] <... mkdir resumed>) = 0 [pid 5074] set_robust_list(0x555582a52660, 24 [pid 5072] <... mkdir resumed>) = 0 [pid 5074] <... set_robust_list resumed>) = 0 [pid 5070] <... mkdir resumed>) = 0 [pid 5074] mkdir("./syzkaller.mO2uVm", 0700 [pid 5071] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 5069] <... clone resumed>, child_tidptr=0x555582a52650) = 5074 [pid 5073] <... mkdir resumed>) = 0 [pid 5072] chmod("./syzkaller.GqG6xl", 0777 [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5074] <... mkdir resumed>) = 0 [pid 5072] <... chmod resumed>) = 0 [pid 5071] <... openat resumed>) = 3 [pid 5074] chmod("./syzkaller.mO2uVm", 0777 [pid 5073] chmod("./syzkaller.4RTVkk", 0777 [pid 5072] chdir("./syzkaller.GqG6xl" [pid 5070] <... openat resumed>) = 3 [pid 5071] ioctl(3, LOOP_CLR_FD [pid 5074] <... chmod resumed>) = 0 [pid 5073] <... chmod resumed>) = 0 [pid 5072] <... chdir resumed>) = 0 [pid 5070] ioctl(3, LOOP_CLR_FD [pid 5073] chdir("./syzkaller.4RTVkk" [pid 5074] chdir("./syzkaller.mO2uVm" [pid 5073] <... chdir resumed>) = 0 [pid 5072] mkdir("./0", 0777 [pid 5071] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 5070] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 5074] <... chdir resumed>) = 0 [pid 5073] mkdir("./0", 0777 [pid 5071] close(3 [pid 5074] mkdir("./0", 0777 [pid 5072] <... mkdir resumed>) = 0 [pid 5071] <... close resumed>) = 0 [pid 5070] close(3 [pid 5073] <... mkdir resumed>) = 0 [pid 5074] <... mkdir resumed>) = 0 [pid 5071] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5074] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 3 ./strace-static-x86_64: Process 5075 attached [pid 5075] set_robust_list(0x555582a52660, 24) = 0 [pid 5075] chdir("./0" [pid 5074] ioctl(3, LOOP_CLR_FD [pid 5075] <... chdir resumed>) = 0 [pid 5074] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 5071] <... clone resumed>, child_tidptr=0x555582a52650) = 5075 [pid 5075] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5075] setpgid(0, 0 [pid 5074] close(3 [pid 5073] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 5072] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 5070] <... close resumed>) = 0 [pid 5075] <... setpgid resumed>) = 0 [pid 5074] <... close resumed>) = 0 [pid 5073] <... openat resumed>) = 3 [pid 5075] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5074] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5073] ioctl(3, LOOP_CLR_FD [pid 5072] <... openat resumed>) = 3 [pid 5070] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5077 attached [pid 5075] <... openat resumed>) = 3 [pid 5073] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 5077] set_robust_list(0x555582a52660, 24 [pid 5073] close(3 [pid 5072] ioctl(3, LOOP_CLR_FD./strace-static-x86_64: Process 5078 attached [pid 5077] <... set_robust_list resumed>) = 0 [pid 5070] <... clone resumed>, child_tidptr=0x555582a52650) = 5078 [pid 5075] write(3, "1000", 4 [pid 5072] <... ioctl resumed>) = -1 ENXIO (No such device or address) [pid 5078] set_robust_list(0x555582a52660, 24 [pid 5075] <... write resumed>) = 4 [pid 5078] <... set_robust_list resumed>) = 0 [pid 5077] chdir("./0" [pid 5073] <... close resumed>) = 0 [pid 5072] close(3 [pid 5078] chdir("./0" [pid 5077] <... chdir resumed>) = 0 [pid 5075] close(3 [pid 5073] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5072] <... close resumed>) = 0 [pid 5078] <... chdir resumed>) = 0 [pid 5077] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5072] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5075] <... close resumed>) = 0 [pid 5077] <... prctl resumed>) = 0 [pid 5075] symlink("/dev/binderfs", "./binderfs"./strace-static-x86_64: Process 5079 attached [pid 5078] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5077] setpgid(0, 0 [pid 5075] <... symlink resumed>) = 0 [pid 5074] <... clone resumed>, child_tidptr=0x555582a52650) = 5077 [pid 5079] set_robust_list(0x555582a52660, 24 [pid 5078] <... prctl resumed>) = 0 [pid 5077] <... setpgid resumed>) = 0 [pid 5073] <... clone resumed>, child_tidptr=0x555582a52650) = 5080 [pid 5072] <... clone resumed>, child_tidptr=0x555582a52650) = 5079 ./strace-static-x86_64: Process 5080 attached [pid 5079] <... set_robust_list resumed>) = 0 [pid 5078] setpgid(0, 0 [pid 5077] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5075] memfd_create("syzkaller", 0 [pid 5080] set_robust_list(0x555582a52660, 24 [pid 5079] chdir("./0" [pid 5078] <... setpgid resumed>) = 0 [pid 5080] <... set_robust_list resumed>) = 0 [pid 5078] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5077] <... openat resumed>) = 3 [pid 5080] chdir("./0" [pid 5078] <... openat resumed>) = 3 [pid 5077] write(3, "1000", 4 [pid 5075] <... memfd_create resumed>) = 3 [pid 5080] <... chdir resumed>) = 0 [pid 5079] <... chdir resumed>) = 0 [pid 5078] write(3, "1000", 4 [pid 5077] <... write resumed>) = 4 [pid 5075] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5080] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5079] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5078] <... write resumed>) = 4 [pid 5077] close(3 [pid 5075] <... mmap resumed>) = 0x7f7d07400000 [pid 5080] <... prctl resumed>) = 0 [pid 5079] <... prctl resumed>) = 0 [pid 5078] close(3 [pid 5077] <... close resumed>) = 0 [pid 5080] setpgid(0, 0 [pid 5077] symlink("/dev/binderfs", "./binderfs" [pid 5078] <... close resumed>) = 0 [pid 5079] setpgid(0, 0 [pid 5078] symlink("/dev/binderfs", "./binderfs" [pid 5079] <... setpgid resumed>) = 0 [pid 5079] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5078] <... symlink resumed>) = 0 [pid 5077] <... symlink resumed>) = 0 [pid 5080] <... setpgid resumed>) = 0 [pid 5080] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5080] write(3, "1000", 4) = 4 [pid 5079] <... openat resumed>) = 3 [pid 5080] close(3 [pid 5077] memfd_create("syzkaller", 0 [pid 5080] <... close resumed>) = 0 [pid 5080] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5079] write(3, "1000", 4 [pid 5078] memfd_create("syzkaller", 0 [pid 5077] <... memfd_create resumed>) = 3 [pid 5080] memfd_create("syzkaller", 0 [pid 5079] <... write resumed>) = 4 [pid 5077] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5080] <... memfd_create resumed>) = 3 [pid 5080] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5077] <... mmap resumed>) = 0x7f7d07400000 [pid 5080] <... mmap resumed>) = 0x7f7d07400000 [pid 5079] close(3 [pid 5078] <... memfd_create resumed>) = 3 [pid 5079] <... close resumed>) = 0 [pid 5078] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5079] symlink("/dev/binderfs", "./binderfs" [pid 5078] <... mmap resumed>) = 0x7f7d07400000 [pid 5079] <... symlink resumed>) = 0 [pid 5079] memfd_create("syzkaller", 0) = 3 [pid 5079] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5078] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5075] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5079] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5080] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5077] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5075] <... write resumed>) = 16777216 [pid 5080] <... write resumed>) = 16777216 [pid 5075] munmap(0x7f7d07400000, 138412032) = 0 [pid 5080] munmap(0x7f7d07400000, 138412032 [pid 5077] <... write resumed>) = 16777216 [pid 5075] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = 4 [pid 5077] munmap(0x7f7d07400000, 138412032 [pid 5075] ioctl(4, LOOP_SET_FD, 3 [pid 5079] <... write resumed>) = 16777216 [pid 5079] munmap(0x7f7d07400000, 138412032 [pid 5078] <... write resumed>) = 16777216 [pid 5075] <... ioctl resumed>) = 0 [pid 5078] munmap(0x7f7d07400000, 138412032 [pid 5080] <... munmap resumed>) = 0 [pid 5077] <... munmap resumed>) = 0 [pid 5075] close(3 [pid 5080] openat(AT_FDCWD, "/dev/loop3", O_RDWR [ 58.531369][ T5075] loop1: detected capacity change from 0 to 32768 [pid 5077] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 5080] <... openat resumed>) = 4 [pid 5079] <... munmap resumed>) = 0 [pid 5078] <... munmap resumed>) = 0 [pid 5075] <... close resumed>) = 0 [pid 5080] ioctl(4, LOOP_SET_FD, 3 [pid 5079] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5077] <... openat resumed>) = 4 [pid 5075] close(4 [pid 5080] <... ioctl resumed>) = 0 [pid 5079] <... openat resumed>) = 4 [pid 5078] <... openat resumed>) = 4 [pid 5077] ioctl(4, LOOP_SET_FD, 3 [pid 5075] <... close resumed>) = 0 [pid 5080] close(3 [pid 5079] ioctl(4, LOOP_SET_FD, 3 [pid 5078] ioctl(4, LOOP_SET_FD, 3 [pid 5077] <... ioctl resumed>) = 0 [pid 5075] mkdir("./file0", 0777 [pid 5080] <... close resumed>) = 0 [pid 5080] close(4) = 0 [pid 5080] mkdir("./file0", 0777) = 0 [pid 5075] <... mkdir resumed>) = 0 [pid 5075] mount("/dev/loop1", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5077] close(3) = 0 [pid 5077] close(4) = 0 [pid 5077] mkdir("./file0", 0777 [pid 5080] mount("/dev/loop3", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5077] <... mkdir resumed>) = 0 [pid 5077] mount("/dev/loop4", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5079] <... ioctl resumed>) = 0 [pid 5079] close(3) = 0 [pid 5079] close(4) = 0 [pid 5079] mkdir("./file0", 0777) = 0 [pid 5079] mount("/dev/loop2", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5075] <... mount resumed>) = 0 [pid 5078] <... ioctl resumed>) = 0 [pid 5078] close(3 [pid 5075] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5078] <... close resumed>) = 0 [pid 5078] close(4 [pid 5077] <... mount resumed>) = 0 [pid 5075] <... openat resumed>) = 3 [pid 5080] <... mount resumed>) = 0 [pid 5078] <... close resumed>) = 0 [pid 5077] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5075] chdir("./file0" [pid 5080] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5078] mkdir("./file0", 0777 [pid 5077] <... openat resumed>) = 3 [pid 5080] <... openat resumed>) = 3 [pid 5078] <... mkdir resumed>) = 0 [pid 5077] chdir("./file0" [pid 5080] chdir("./file0" [pid 5075] <... chdir resumed>) = 0 [pid 5080] <... chdir resumed>) = 0 [pid 5077] <... chdir resumed>) = 0 [pid 5080] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 5075] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 5080] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5077] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 5078] mount("/dev/loop0", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5075] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5080] exit_group(0 [pid 5077] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5075] exit_group(0 [ 58.580234][ T5080] loop3: detected capacity change from 0 to 32768 [ 58.590592][ T5077] loop4: detected capacity change from 0 to 32768 [ 58.602626][ T5079] loop2: detected capacity change from 0 to 32768 [ 58.614427][ T5078] loop0: detected capacity change from 0 to 32768 [pid 5077] exit_group(0 [pid 5080] <... exit_group resumed>) = ? [pid 5077] <... exit_group resumed>) = ? [pid 5075] <... exit_group resumed>) = ? [pid 5077] +++ exited with 0 +++ [pid 5075] +++ exited with 0 +++ [pid 5080] +++ exited with 0 +++ [pid 5074] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5077, si_uid=0, si_status=0, si_utime=5 /* 0.05 s */, si_stime=24 /* 0.24 s */} --- [pid 5079] <... mount resumed>) = 0 [pid 5071] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5075, si_uid=0, si_status=0, si_utime=6 /* 0.06 s */, si_stime=22 /* 0.22 s */} --- [pid 5073] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5080, si_uid=0, si_status=0, si_utime=7 /* 0.07 s */, si_stime=23 /* 0.23 s */} --- [pid 5071] restart_syscall(<... resuming interrupted clone ...> [pid 5079] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5071] <... restart_syscall resumed>) = 0 [pid 5079] <... openat resumed>) = 3 [pid 5079] chdir("./file0" [pid 5071] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5079] <... chdir resumed>) = 0 [pid 5071] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5079] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 5071] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5079] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5073] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] <... openat resumed>) = 3 [pid 5071] newfstatat(3, "", [pid 5079] exit_group(0 [pid 5073] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5071] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5073] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5071] getdents64(3, [pid 5079] <... exit_group resumed>) = ? [pid 5073] <... openat resumed>) = 3 [pid 5071] <... getdents64 resumed>0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5071] umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5071] newfstatat(AT_FDCWD, "./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5073] newfstatat(3, "", [pid 5071] unlink("./0/binderfs" [pid 5074] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5071] <... unlink resumed>) = 0 [pid 5079] +++ exited with 0 +++ [pid 5074] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] getdents64(3, [pid 5071] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5078] <... mount resumed>) = 0 [pid 5074] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5073] <... getdents64 resumed>0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5078] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5074] <... openat resumed>) = 3 [pid 5072] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5079, si_uid=0, si_status=0, si_utime=6 /* 0.06 s */, si_stime=25 /* 0.25 s */} --- [pid 5078] <... openat resumed>) = 3 [pid 5074] newfstatat(3, "", [pid 5073] umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5072] restart_syscall(<... resuming interrupted clone ...> [pid 5078] chdir("./file0" [pid 5074] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5078] <... chdir resumed>) = 0 [pid 5074] getdents64(3, [pid 5073] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5072] <... restart_syscall resumed>) = 0 [pid 5078] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5074] <... getdents64 resumed>0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5073] newfstatat(AT_FDCWD, "./0/binderfs", [pid 5078] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5074] umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] <... newfstatat resumed>{st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5078] exit_group(0 [pid 5074] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] unlink("./0/binderfs" [pid 5072] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] <... umount2 resumed>) = 0 [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] <... unlink resumed>) = 0 [pid 5073] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5078] <... exit_group resumed>) = ? [pid 5074] newfstatat(AT_FDCWD, "./0/binderfs", [pid 5073] <... umount2 resumed>) = 0 [pid 5072] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5071] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5074] <... newfstatat resumed>{st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5073] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5072] <... openat resumed>) = 3 [pid 5071] newfstatat(AT_FDCWD, "./0/file0", [pid 5078] +++ exited with 0 +++ [pid 5074] unlink("./0/binderfs" [pid 5073] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5072] newfstatat(3, "", [pid 5071] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5074] <... unlink resumed>) = 0 [pid 5073] newfstatat(AT_FDCWD, "./0/file0", [pid 5072] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5070] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5078, si_uid=0, si_status=0, si_utime=5 /* 0.05 s */, si_stime=30 /* 0.30 s */} --- [pid 5074] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5072] getdents64(3, [pid 5071] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5072] <... getdents64 resumed>0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5071] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5072] umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5071] openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5073] <... openat resumed>) = 4 [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5074] <... umount2 resumed>) = 0 [pid 5073] newfstatat(4, "", [pid 5072] newfstatat(AT_FDCWD, "./0/binderfs", [pid 5071] <... openat resumed>) = 4 [pid 5074] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5072] <... newfstatat resumed>{st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5074] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] getdents64(4, [pid 5070] umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5070] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] getdents64(4, [pid 5070] openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5073] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5070] <... openat resumed>) = 3 [pid 5074] newfstatat(AT_FDCWD, "./0/file0", [pid 5073] close(4 [pid 5072] unlink("./0/binderfs" [pid 5071] newfstatat(4, "", [pid 5070] newfstatat(3, "", [pid 5074] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5073] <... close resumed>) = 0 [pid 5070] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5074] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5073] rmdir("./0/file0" [pid 5072] <... unlink resumed>) = 0 [pid 5071] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5070] getdents64(3, [pid 5074] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] <... rmdir resumed>) = 0 [pid 5072] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] getdents64(4, [pid 5070] <... getdents64 resumed>0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5074] openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5071] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5070] umount2("./0/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] <... openat resumed>) = 4 [pid 5071] getdents64(4, [pid 5070] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5074] newfstatat(4, "", [pid 5071] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5070] newfstatat(AT_FDCWD, "./0/binderfs", [pid 5073] getdents64(3, [pid 5070] <... newfstatat resumed>{st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5074] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5073] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5071] close(4 [pid 5070] unlink("./0/binderfs" [pid 5074] getdents64(4, [pid 5072] <... umount2 resumed>) = 0 [pid 5071] <... close resumed>) = 0 [pid 5070] <... unlink resumed>) = 0 [pid 5074] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5073] close(3 [pid 5072] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] rmdir("./0/file0" [pid 5070] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] getdents64(4, [pid 5073] <... close resumed>) = 0 [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5074] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5073] rmdir("./0" [pid 5072] newfstatat(AT_FDCWD, "./0/file0", [pid 5071] <... rmdir resumed>) = 0 [pid 5074] close(4 [pid 5073] <... rmdir resumed>) = 0 [pid 5072] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5071] getdents64(3, [pid 5074] <... close resumed>) = 0 [pid 5074] rmdir("./0/file0" [pid 5071] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5074] <... rmdir resumed>) = 0 [pid 5073] mkdir("./1", 0777 [pid 5071] close(3 [pid 5074] getdents64(3, [pid 5072] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5070] <... umount2 resumed>) = 0 [pid 5074] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5071] <... close resumed>) = 0 [pid 5074] close(3 [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5071] rmdir("./0" [pid 5070] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5070] newfstatat(AT_FDCWD, "./0/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5072] openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5071] <... rmdir resumed>) = 0 [pid 5070] umount2("./0/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] <... close resumed>) = 0 [pid 5070] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5070] openat(AT_FDCWD, "./0/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5074] rmdir("./0" [pid 5072] <... openat resumed>) = 4 [pid 5071] mkdir("./1", 0777 [pid 5070] <... openat resumed>) = 4 [pid 5073] <... mkdir resumed>) = 0 [pid 5070] newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5071] <... mkdir resumed>) = 0 [pid 5070] getdents64(4, [pid 5074] <... rmdir resumed>) = 0 [pid 5073] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 5070] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5070] getdents64(4, [pid 5072] newfstatat(4, "", [pid 5074] mkdir("./1", 0777 [pid 5070] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5071] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 5073] <... openat resumed>) = 3 [pid 5071] <... openat resumed>) = 3 [pid 5070] close(4 [pid 5074] <... mkdir resumed>) = 0 [pid 5071] ioctl(3, LOOP_CLR_FD [pid 5070] <... close resumed>) = 0 [pid 5072] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5070] rmdir("./0/file0" [pid 5073] ioctl(3, LOOP_CLR_FD [pid 5072] getdents64(4, [pid 5070] <... rmdir resumed>) = 0 [pid 5074] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 5072] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5070] getdents64(3, [pid 5074] <... openat resumed>) = 3 [pid 5072] getdents64(4, [pid 5070] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5070] close(3) = 0 [pid 5070] rmdir("./0" [pid 5074] ioctl(3, LOOP_CLR_FD [pid 5072] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5070] <... rmdir resumed>) = 0 [pid 5074] <... ioctl resumed>) = 0 [pid 5072] close(4 [pid 5070] mkdir("./1", 0777 [pid 5074] close(3 [pid 5072] <... close resumed>) = 0 [pid 5074] <... close resumed>) = 0 [pid 5072] rmdir("./0/file0" [pid 5074] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5072] <... rmdir resumed>) = 0 [pid 5070] <... mkdir resumed>) = 0 [pid 5072] getdents64(3, [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR./strace-static-x86_64: Process 5083 attached [pid 5074] <... clone resumed>, child_tidptr=0x555582a52650) = 5083 [pid 5072] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5072] close(3 [pid 5083] set_robust_list(0x555582a52660, 24 [pid 5070] <... openat resumed>) = 3 [pid 5072] <... close resumed>) = 0 [pid 5072] rmdir("./0" [pid 5070] ioctl(3, LOOP_CLR_FD) = 0 [pid 5083] <... set_robust_list resumed>) = 0 [pid 5072] <... rmdir resumed>) = 0 [pid 5072] mkdir("./1", 0777 [pid 5070] close(3) = 0 [pid 5070] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5072] <... mkdir resumed>) = 0 [pid 5083] chdir("./1" [pid 5072] openat(AT_FDCWD, "/dev/loop2", O_RDWR./strace-static-x86_64: Process 5084 attached [pid 5083] <... chdir resumed>) = 0 [pid 5072] <... openat resumed>) = 3 [pid 5070] <... clone resumed>, child_tidptr=0x555582a52650) = 5084 [pid 5084] set_robust_list(0x555582a52660, 24) = 0 [pid 5084] chdir("./1") = 0 [pid 5084] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5084] setpgid(0, 0) = 0 [pid 5084] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5072] ioctl(3, LOOP_CLR_FD [pid 5083] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5083] setpgid(0, 0) = 0 [pid 5084] <... openat resumed>) = 3 [pid 5083] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5084] write(3, "1000", 4) = 4 [pid 5084] close(3) = 0 [pid 5084] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5083] <... openat resumed>) = 3 [pid 5084] memfd_create("syzkaller", 0 [pid 5083] write(3, "1000", 4) = 4 [pid 5083] close(3 [pid 5084] <... memfd_create resumed>) = 3 [pid 5083] <... close resumed>) = 0 [pid 5083] symlink("/dev/binderfs", "./binderfs" [pid 5084] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5083] <... symlink resumed>) = 0 [pid 5083] memfd_create("syzkaller", 0) = 3 [pid 5083] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5072] <... ioctl resumed>) = 0 [pid 5072] close(3) = 0 [pid 5072] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5087 attached , child_tidptr=0x555582a52650) = 5087 [pid 5087] set_robust_list(0x555582a52660, 24) = 0 [pid 5087] chdir("./1") = 0 [pid 5087] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5087] setpgid(0, 0) = 0 [pid 5087] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5087] write(3, "1000", 4) = 4 [pid 5087] close(3) = 0 [pid 5087] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5087] memfd_create("syzkaller", 0) = 3 [pid 5087] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5073] <... ioctl resumed>) = 0 [pid 5071] <... ioctl resumed>) = 0 [pid 5071] close(3) = 0 [pid 5071] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5088 attached [pid 5088] set_robust_list(0x555582a52660, 24) = 0 [pid 5088] chdir("./1") = 0 [pid 5088] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5088] setpgid(0, 0) = 0 [pid 5088] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5071] <... clone resumed>, child_tidptr=0x555582a52650) = 5088 [pid 5088] <... openat resumed>) = 3 [pid 5088] write(3, "1000", 4) = 4 [pid 5073] close(3 [pid 5088] close(3) = 0 [pid 5088] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5073] <... close resumed>) = 0 [pid 5088] memfd_create("syzkaller", 0 [pid 5073] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5088] <... memfd_create resumed>) = 3 [pid 5088] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5084] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5073] <... clone resumed>, child_tidptr=0x555582a52650) = 5089 ./strace-static-x86_64: Process 5089 attached [pid 5089] set_robust_list(0x555582a52660, 24) = 0 [pid 5089] chdir("./1") = 0 [pid 5089] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5089] setpgid(0, 0) = 0 [pid 5089] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5089] write(3, "1000", 4) = 4 [pid 5089] close(3) = 0 [pid 5089] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5089] memfd_create("syzkaller", 0) = 3 [pid 5089] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5083] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5087] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5088] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5084] <... write resumed>) = 16777216 [pid 5084] munmap(0x7f7d07400000, 138412032) = 0 [pid 5084] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5084] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5084] close(3) = 0 [pid 5084] close(4) = 0 [pid 5084] mkdir("./file0", 0777) = 0 [ 59.808422][ T5084] loop0: detected capacity change from 0 to 32768 [pid 5084] mount("/dev/loop0", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"...) = 0 [pid 5084] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5084] chdir("./file0") = 0 [pid 5084] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5089] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5084] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5084] exit_group(0) = ? [pid 5084] +++ exited with 0 +++ [pid 5070] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5084, si_uid=0, si_status=0, si_utime=9 /* 0.09 s */, si_stime=24 /* 0.24 s */} --- [pid 5070] umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5070] openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5070] newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5070] getdents64(3, 0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5070] umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5070] newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5070] unlink("./1/binderfs") = 0 [pid 5070] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = 0 [pid 5070] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5070] newfstatat(AT_FDCWD, "./1/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5070] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5070] openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 [pid 5070] newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5070] getdents64(4, 0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5070] getdents64(4, 0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5070] close(4) = 0 [pid 5083] <... write resumed>) = 16777216 [pid 5070] rmdir("./1/file0") = 0 [pid 5070] getdents64(3, 0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5070] close(3) = 0 [pid 5083] munmap(0x7f7d07400000, 138412032 [pid 5070] rmdir("./1") = 0 [pid 5070] mkdir("./2", 0777) = 0 [pid 5070] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 [pid 5070] ioctl(3, LOOP_CLR_FD [pid 5083] <... munmap resumed>) = 0 [pid 5083] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = 4 [pid 5083] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5083] close(3) = 0 [pid 5083] close(4) = 0 [pid 5083] mkdir("./file0", 0777) = 0 [pid 5087] <... write resumed>) = 16777216 [pid 5083] mount("/dev/loop4", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5087] munmap(0x7f7d07400000, 138412032 [pid 5083] <... mount resumed>) = 0 [ 60.050055][ T5083] loop4: detected capacity change from 0 to 32768 [pid 5083] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5083] chdir("./file0") = 0 [pid 5087] <... munmap resumed>) = 0 [pid 5087] openat(AT_FDCWD, "/dev/loop2", O_RDWR) = 4 [pid 5087] ioctl(4, LOOP_SET_FD, 3 [pid 5083] openat(AT_FDCWD, "/dev/loop4", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5083] exit_group(0) = ? [pid 5083] +++ exited with 0 +++ [pid 5074] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5083, si_uid=0, si_status=0, si_utime=7 /* 0.07 s */, si_stime=27 /* 0.27 s */} --- [pid 5074] umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5074] openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5074] newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5074] getdents64(3, 0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5074] umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5074] newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5074] unlink("./1/binderfs") = 0 [pid 5074] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5087] <... ioctl resumed>) = 0 [pid 5087] close(3) = 0 [pid 5087] close(4) = 0 [pid 5087] mkdir("./file0", 0777) = 0 [ 60.152581][ T5087] loop2: detected capacity change from 0 to 32768 [pid 5087] mount("/dev/loop2", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5074] <... umount2 resumed>) = 0 [pid 5074] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5087] <... mount resumed>) = 0 [pid 5074] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5087] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5074] newfstatat(AT_FDCWD, "./1/file0", [pid 5087] <... openat resumed>) = 3 [pid 5074] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5087] chdir("./file0" [pid 5074] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5087] <... chdir resumed>) = 0 [pid 5074] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5087] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 5074] openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 [pid 5074] newfstatat(4, "", [pid 5087] <... openat resumed>) = -1 EBUSY (Device or resource busy) [pid 5074] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5087] exit_group(0 [pid 5074] getdents64(4, [pid 5087] <... exit_group resumed>) = ? [pid 5088] <... write resumed>) = 16777216 [pid 5074] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5088] munmap(0x7f7d07400000, 138412032 [pid 5087] +++ exited with 0 +++ [pid 5074] getdents64(4, 0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5074] close(4 [pid 5072] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5087, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=29 /* 0.29 s */} --- [pid 5074] <... close resumed>) = 0 [pid 5072] umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] rmdir("./1/file0" [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5072] openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5072] newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5074] <... rmdir resumed>) = 0 [pid 5072] getdents64(3, [pid 5074] getdents64(3, [pid 5072] <... getdents64 resumed>0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5074] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5072] umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] close(3 [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5072] newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5072] unlink("./1/binderfs") = 0 [pid 5072] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] <... close resumed>) = 0 [pid 5074] rmdir("./1") = 0 [pid 5074] mkdir("./2", 0777) = 0 [pid 5088] <... munmap resumed>) = 0 [pid 5074] openat(AT_FDCWD, "/dev/loop4", O_RDWR [pid 5072] <... umount2 resumed>) = 0 [pid 5074] <... openat resumed>) = 3 [pid 5088] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 5072] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5070] <... ioctl resumed>) = 0 [pid 5074] ioctl(3, LOOP_CLR_FD [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5072] newfstatat(AT_FDCWD, "./1/file0", [pid 5070] close(3) = 0 [pid 5072] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5070] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5072] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW./strace-static-x86_64: Process 5090 attached [pid 5088] <... openat resumed>) = 4 [pid 5072] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5070] <... clone resumed>, child_tidptr=0x555582a52650) = 5090 [pid 5090] set_robust_list(0x555582a52660, 24) = 0 [pid 5090] chdir("./2") = 0 [pid 5090] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5090] setpgid(0, 0) = 0 [pid 5090] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5090] write(3, "1000", 4) = 4 [pid 5090] close(3) = 0 [pid 5090] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5090] memfd_create("syzkaller", 0) = 3 [pid 5090] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5088] ioctl(4, LOOP_SET_FD, 3 [pid 5072] openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 [pid 5072] newfstatat(4, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5072] getdents64(4, [pid 5088] <... ioctl resumed>) = 0 [pid 5072] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5088] close(3 [pid 5072] getdents64(4, [pid 5088] <... close resumed>) = 0 [pid 5072] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5088] close(4 [pid 5072] close(4 [pid 5088] <... close resumed>) = 0 [pid 5088] mkdir("./file0", 0777 [pid 5072] <... close resumed>) = 0 [pid 5072] rmdir("./1/file0" [pid 5088] <... mkdir resumed>) = 0 [pid 5088] mount("/dev/loop1", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5089] <... write resumed>) = 16777216 [pid 5072] <... rmdir resumed>) = 0 [pid 5072] getdents64(3, 0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5089] munmap(0x7f7d07400000, 138412032 [pid 5088] <... mount resumed>) = 0 [pid 5072] close(3 [pid 5088] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5072] <... close resumed>) = 0 [pid 5088] <... openat resumed>) = 3 [pid 5072] rmdir("./1" [pid 5088] chdir("./file0" [pid 5072] <... rmdir resumed>) = 0 [pid 5088] <... chdir resumed>) = 0 [pid 5088] openat(AT_FDCWD, "/dev/loop1", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5088] exit_group(0) = ? [ 60.339002][ T5088] loop1: detected capacity change from 0 to 32768 [pid 5072] mkdir("./2", 0777 [pid 5089] <... munmap resumed>) = 0 [pid 5072] <... mkdir resumed>) = 0 [pid 5088] +++ exited with 0 +++ [pid 5071] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5088, si_uid=0, si_status=0, si_utime=13 /* 0.13 s */, si_stime=20 /* 0.20 s */} --- [pid 5072] openat(AT_FDCWD, "/dev/loop2", O_RDWR [pid 5071] restart_syscall(<... resuming interrupted clone ...> [pid 5072] <... openat resumed>) = 3 [pid 5071] <... restart_syscall resumed>) = 0 [pid 5072] ioctl(3, LOOP_CLR_FD [pid 5071] umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5071] openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5089] openat(AT_FDCWD, "/dev/loop3", O_RDWR [pid 5071] <... openat resumed>) = 3 [pid 5071] newfstatat(3, "", [pid 5089] <... openat resumed>) = 4 [pid 5089] ioctl(4, LOOP_SET_FD, 3 [pid 5071] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5089] <... ioctl resumed>) = 0 [pid 5089] close(3 [pid 5071] getdents64(3, 0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5089] <... close resumed>) = 0 [pid 5089] close(4 [pid 5071] umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5089] <... close resumed>) = 0 [pid 5089] mkdir("./file0", 0777 [pid 5071] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5071] newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5089] <... mkdir resumed>) = 0 [pid 5071] unlink("./1/binderfs" [pid 5089] mount("/dev/loop3", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5071] <... unlink resumed>) = 0 [ 60.449802][ T5089] loop3: detected capacity change from 0 to 32768 [pid 5071] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5089] <... mount resumed>) = 0 [pid 5089] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 [pid 5089] chdir("./file0") = 0 [pid 5089] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5089] exit_group(0) = ? [pid 5089] +++ exited with 0 +++ [pid 5073] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5089, si_uid=0, si_status=0, si_utime=9 /* 0.09 s */, si_stime=28 /* 0.28 s */} --- [pid 5073] umount2("./1", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5073] openat(AT_FDCWD, "./1", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5073] newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5071] <... umount2 resumed>) = 0 [pid 5073] getdents64(3, 0x555582a536f0 /* 4 entries */, 32768) = 112 [pid 5073] umount2("./1/binderfs", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5073] newfstatat(AT_FDCWD, "./1/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5073] unlink("./1/binderfs") = 0 [pid 5073] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) [pid 5071] newfstatat(AT_FDCWD, "./1/file0", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5074] <... ioctl resumed>) = 0 [pid 5073] <... umount2 resumed>) = 0 [pid 5071] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5074] close(3) = 0 [pid 5073] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5073] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5071] openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5074] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5071] <... openat resumed>) = 4 [pid 5073] newfstatat(AT_FDCWD, "./1/file0", [pid 5071] newfstatat(4, "", ./strace-static-x86_64: Process 5091 attached [pid 5073] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_SYMLINK_NOFOLLOW) = 0 [pid 5071] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5091] set_robust_list(0x555582a52660, 24 [pid 5073] umount2("./1/file0", MNT_FORCE|UMOUNT_NOFOLLOW [pid 5071] getdents64(4, [pid 5091] <... set_robust_list resumed>) = 0 [pid 5074] <... clone resumed>, child_tidptr=0x555582a52650) = 5091 [pid 5073] <... umount2 resumed>) = -1 EINVAL (Invalid argument) [pid 5091] chdir("./2" [pid 5073] openat(AT_FDCWD, "./1/file0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5091] <... chdir resumed>) = 0 [pid 5091] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5073] <... openat resumed>) = 4 [pid 5071] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5091] <... prctl resumed>) = 0 [pid 5073] newfstatat(4, "", [pid 5071] getdents64(4, [pid 5091] setpgid(0, 0 [pid 5090] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5073] <... newfstatat resumed>{st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 [pid 5071] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5091] <... setpgid resumed>) = 0 [pid 5073] getdents64(4, [pid 5071] close(4 [pid 5091] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5073] <... getdents64 resumed>0x555582a5b730 /* 2 entries */, 32768) = 48 [pid 5091] <... openat resumed>) = 3 [pid 5073] getdents64(4, [pid 5071] <... close resumed>) = 0 [pid 5091] write(3, "1000", 4 [pid 5071] rmdir("./1/file0") = 0 [pid 5091] <... write resumed>) = 4 [pid 5071] getdents64(3, [pid 5091] close(3 [pid 5073] <... getdents64 resumed>0x555582a5b730 /* 0 entries */, 32768) = 0 [pid 5091] <... close resumed>) = 0 [pid 5073] close(4 [pid 5071] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5091] symlink("/dev/binderfs", "./binderfs" [pid 5071] close(3 [pid 5073] <... close resumed>) = 0 [pid 5091] <... symlink resumed>) = 0 [pid 5073] rmdir("./1/file0" [pid 5071] <... close resumed>) = 0 [pid 5091] memfd_create("syzkaller", 0 [pid 5073] <... rmdir resumed>) = 0 [pid 5071] rmdir("./1" [pid 5091] <... memfd_create resumed>) = 3 [pid 5073] getdents64(3, [pid 5091] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5073] <... getdents64 resumed>0x555582a536f0 /* 0 entries */, 32768) = 0 [pid 5071] <... rmdir resumed>) = 0 [pid 5091] <... mmap resumed>) = 0x7f7d07400000 [pid 5073] close(3 [pid 5071] mkdir("./2", 0777 [pid 5073] <... close resumed>) = 0 [pid 5073] rmdir("./1" [pid 5071] <... mkdir resumed>) = 0 [pid 5073] <... rmdir resumed>) = 0 [pid 5071] openat(AT_FDCWD, "/dev/loop1", O_RDWR [pid 5073] mkdir("./2", 0777 [pid 5071] <... openat resumed>) = 3 [pid 5073] <... mkdir resumed>) = 0 [pid 5071] ioctl(3, LOOP_CLR_FD [pid 5073] openat(AT_FDCWD, "/dev/loop3", O_RDWR) = 3 [pid 5073] ioctl(3, LOOP_CLR_FD [pid 5072] <... ioctl resumed>) = 0 [pid 5072] close(3) = 0 [pid 5072] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5092 attached [pid 5092] set_robust_list(0x555582a52660, 24) = 0 [pid 5072] <... clone resumed>, child_tidptr=0x555582a52650) = 5092 [pid 5092] chdir("./2") = 0 [pid 5092] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5092] setpgid(0, 0) = 0 [pid 5092] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5092] write(3, "1000", 4) = 4 [pid 5092] close(3) = 0 [pid 5092] symlink("/dev/binderfs", "./binderfs") = 0 [pid 5092] memfd_create("syzkaller", 0) = 3 [pid 5092] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f7d07400000 [pid 5090] <... write resumed>) = 16777216 [pid 5090] munmap(0x7f7d07400000, 138412032 [pid 5073] <... ioctl resumed>) = 0 [pid 5073] close(3) = 0 [pid 5090] <... munmap resumed>) = 0 [pid 5073] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5071] <... ioctl resumed>) = 0 [pid 5071] close(3./strace-static-x86_64: Process 5093 attached [pid 5090] openat(AT_FDCWD, "/dev/loop0", O_RDWR [pid 5071] <... close resumed>) = 0 [pid 5090] <... openat resumed>) = 4 [pid 5093] set_robust_list(0x555582a52660, 24 [pid 5073] <... clone resumed>, child_tidptr=0x555582a52650) = 5093 [pid 5071] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5093] <... set_robust_list resumed>) = 0 ./strace-static-x86_64: Process 5094 attached [pid 5093] chdir("./2" [pid 5094] set_robust_list(0x555582a52660, 24 [pid 5093] <... chdir resumed>) = 0 [pid 5094] <... set_robust_list resumed>) = 0 [pid 5093] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5094] chdir("./2" [pid 5093] <... prctl resumed>) = 0 [pid 5090] ioctl(4, LOOP_SET_FD, 3 [pid 5094] <... chdir resumed>) = 0 [pid 5093] setpgid(0, 0 [pid 5094] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5094] setpgid(0, 0 [pid 5071] <... clone resumed>, child_tidptr=0x555582a52650) = 5094 [pid 5094] <... setpgid resumed>) = 0 [pid 5094] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5094] write(3, "1000", 4 [pid 5090] <... ioctl resumed>) = 0 [pid 5094] <... write resumed>) = 4 [pid 5094] close(3) = 0 [pid 5090] close(3 [pid 5094] symlink("/dev/binderfs", "./binderfs" [pid 5090] <... close resumed>) = 0 [pid 5094] <... symlink resumed>) = 0 [pid 5093] <... setpgid resumed>) = 0 [pid 5090] close(4 [pid 5094] memfd_create("syzkaller", 0 [pid 5093] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5090] <... close resumed>) = 0 [pid 5094] <... memfd_create resumed>) = 3 [pid 5090] mkdir("./file0", 0777 [pid 5094] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0 [pid 5093] <... openat resumed>) = 3 [pid 5094] <... mmap resumed>) = 0x7f7d07400000 [pid 5090] <... mkdir resumed>) = 0 [pid 5093] write(3, "1000", 4 [pid 5090] mount("/dev/loop0", "./file0", "jfs", MS_NOSUID|MS_NODIRATIME, "errors=remount-ro,nodiscard,resize,gid=0x000000000000ee00,nointegrity,errors=continue,grpquota,integ"... [pid 5093] <... write resumed>) = 4 [pid 5091] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 16777216 [pid 5093] close(3 [pid 5090] <... mount resumed>) = 0 [pid 5093] <... close resumed>) = 0 [pid 5090] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY [pid 5093] symlink("/dev/binderfs", "./binderfs" [pid 5090] <... openat resumed>) = 3 [pid 5093] <... symlink resumed>) = 0 [pid 5090] chdir("./file0" [ 61.051052][ T5090] loop0: detected capacity change from 0 to 32768 [pid 5093] memfd_create("syzkaller", 0) = 3 [pid 5090] <... chdir resumed>) = 0 [pid 5090] openat(AT_FDCWD, "/dev/loop0", O_RDWR