./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor835904079 <...> Warning: Permanently added '10.128.1.126' (ECDSA) to the list of known hosts. execve("./syz-executor835904079", ["./syz-executor835904079"], 0x7ffd123253b0 /* 10 vars */) = 0 brk(NULL) = 0x55555667a000 brk(0x55555667ac40) = 0x55555667ac40 arch_prctl(ARCH_SET_FS, 0x55555667a300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor835904079", 4096) = 27 brk(0x55555669bc40) = 0x55555669bc40 brk(0x55555669c000) = 0x55555669c000 mprotect(0x7f0a93ae1000, 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 getpid() = 304 mkdir("./syzkaller.fmT1fd", 0700) = 0 chmod("./syzkaller.fmT1fd", 0777) = 0 chdir("./syzkaller.fmT1fd") = 0 mkdir("./0", 0777) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55555667a5d0) = 305 ./strace-static-x86_64: Process 305 attached [pid 305] chdir("./0") = 0 [pid 305] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 305] setpgid(0, 0) = 0 [pid 305] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 305] write(3, "1000", 4) = 4 [pid 305] close(3) = 0 [pid 305] symlink("/dev/binderfs", "./binderfs") = 0 [pid 305] openat(AT_FDCWD, "/dev/loop0", O_RDONLY) = 3 [pid 305] ioctl(3, LOOP_SET_STATUS, {lo_number=0, lo_offset=0xffffffff, lo_flags=0, lo_name="\xb8\x2b\x91\x42\x1e\x13\x30\x6f\x5a\x01\x38\xfa\xc6\x0e\xf2\x2f\x15\x9f\x20\xa8\xd7\x4e\x17\xcf\x9b\x67\x0e\x2d\x7c\x1f\x51\x6a\x12\xea\xd2\xa7\x41\x4a\x4e\x85\x9f\x77\xad\x9a\xf2\x5b\xc2\x62\x21\x65\x77", ...}) = -1 ENXIO (No such device or address) [pid 305] openat(AT_FDCWD, "/dev/loop0", O_RDONLY) = 4 [pid 305] openat(AT_FDCWD, "/dev/loop0", O_RDONLY) = 5 [pid 305] memfd_create("\x55\xff\x41\x05\xd6\xe7\xfc\xa3\xb0\x04\xe2\x1b\x5c\x62\x79\xdc\x32\xe3\x5a\x6f\x4c\x14\xa7\x8c\x27\xa7\xcf\xff\xf0\x2b\x39\xac\x5c\xa4\xa5\x3d\x5c\xcc\xf6\xc4\x52\x88\x41\x94\xe0\xff\xff\xff\x58\x91\x1a\x75\x83\x56\xc1\x48\xd3\x0d\x5a\x01\x21\x62\xc0\xae\x57\xc5\x1f\xec\xfd\xe3\xc1\x07\xeb\x5c\x2c\x98\x50\x20\xf2\xfe\xc5\xf9\xd4\x9a\x16\xa6\xb2\xde\x82\xa8\xf9\xcb\x7b\xa9\x6d\x83\xfb\x84\x8e\xef"..., 0) = 6 [pid 305] ioctl(5, LOOP_SET_FD, 6) = 0 [pid 305] ioctl(4, LOOP_GET_STATUS64, {lo_offset=0, lo_number=0, lo_flags=LO_FLAGS_READ_ONLY, lo_file_name="", ...}) = 0 [pid 305] exit_group(0) = ? [ 22.164747][ T22] audit: type=1400 audit(1677268576.750:73): avc: denied { execmem } for pid=304 comm="syz-executor835" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 22.191253][ T22] audit: type=1400 audit(1677268576.780:74): avc: denied { read } for pid=305 comm="syz-executor835" name="loop0" dev="devtmpfs" ino=9305 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 305] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=305, si_uid=0, si_status=0, si_utime=0, si_stime=1} --- umount2("./0", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 fstat(3, {st_mode=S_IFDIR|0700, st_size=4096, ...}) = 0 getdents64(3, 0x55555667b620 /* 3 entries */, 32768) = 80 umount2("./0/binderfs", MNT_DETACH|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) lstat("./0/binderfs", {st_mode=S_IFLNK|0777, st_size=13, ...}) = 0 unlink("./0/binderfs") = 0 getdents64(3, 0x55555667b620 /* 0 entries */, 32768) = 0 close(3) = 0 rmdir("./0") = 0 mkdir("./1", 0777) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 308 attached , child_tidptr=0x55555667a5d0) = 308 [pid 308] chdir("./1") = 0 [pid 308] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 308] setpgid(0, 0) = 0 [pid 308] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 308] write(3, "1000", 4) = 4 [pid 308] close(3) = 0 [pid 308] symlink("/dev/binderfs", "./binderfs") = 0 [ 22.216369][ T22] audit: type=1400 audit(1677268576.780:75): avc: denied { open } for pid=305 comm="syz-executor835" path="/dev/loop0" dev="devtmpfs" ino=9305 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 22.240667][ T22] audit: type=1400 audit(1677268576.780:76): avc: denied { ioctl } for pid=305 comm="syz-executor835" path="/dev/loop0" dev="devtmpfs" ino=9305 ioctlcmd=0x4c02 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 308] openat(AT_FDCWD, "/dev/loop0", O_RDONLY) = 3 [pid 308] ioctl(3, LOOP_SET_STATUS, {lo_number=0, lo_offset=0xffffffff, lo_flags=0, lo_name="\xb8\x2b\x91\x42\x1e\x13\x30\x6f\x5a\x01\x38\xfa\xc6\x0e\xf2\x2f\x15\x9f\x20\xa8\xd7\x4e\x17\xcf\x9b\x67\x0e\x2d\x7c\x1f\x51\x6a\x12\xea\xd2\xa7\x41\x4a\x4e\x85\x9f\x77\xad\x9a\xf2\x5b\xc2\x62\x21\x65\x77", ...}) = 0 [pid 308] openat(AT_FDCWD, "/dev/loop0", O_RDONLY) = 4 [pid 308] openat(AT_FDCWD, "/dev/loop0", O_RDONLY) = 5 [pid 308] memfd_create("\x55\xff\x41\x05\xd6\xe7\xfc\xa3\xb0\x04\xe2\x1b\x5c\x62\x79\xdc\x32\xe3\x5a\x6f\x4c\x14\xa7\x8c\x27\xa7\xcf\xff\xf0\x2b\x39\xac\x5c\xa4\xa5\x3d\x5c\xcc\xf6\xc4\x52\x88\x41\x94\xe0\xff\xff\xff\x58\x91\x1a\x75\x83\x56\xc1\x48\xd3\x0d\x5a\x01\x21\x62\xc0\xae\x57\xc5\x1f\xec\xfd\xe3\xc1\x07\xeb\x5c\x2c\x98\x50\x20\xf2\xfe\xc5\xf9\xd4\x9a\x16\xa6\xb2\xde\x82\xa8\xf9\xcb\x7b\xa9\x6d\x83\xfb\x84\x8e\xef"..., 0) = 6 [pid 308] ioctl(5, LOOP_SET_FD, 6) = -1 EBUSY (Device or resource busy) [pid 308] ioctl(4, LOOP_GET_STATUS64, 0x20000000) = -1 EOVERFLOW (Value too large for defined data type) [pid 308] exit_group(0) = ? [pid 304] kill(-308, SIGKILL) = 0 [pid 304] kill(308, SIGKILL) = 0 [pid 304] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 304] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0 [pid 304] getdents64(3, 0x55555667b620 /* 2 entries */, 32768) = 48 [pid 304] getdents64(3, 0x55555667b620 /* 0 entries */, 32768) = 0 [pid 304] close(3) = 0 [ 66.202588][ T67] cfg80211: failed to load regulatory.db [ 84.231108][ T155] udevd[155]: worker [307] /devices/virtual/block/loop0 is taking a long time [ 204.374950][ T155] udevd[155]: worker [307] /devices/virtual/block/loop0 timeout; kill it [ 204.392220][ T155] udevd[155]: seq 2307 '/devices/virtual/block/loop0' killed