./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4090488481 <...> Warning: Permanently added '10.128.0.9' (ED25519) to the list of known hosts. execve("./syz-executor4090488481", ["./syz-executor4090488481"], 0x7ffd504dc310 /* 10 vars */) = 0 brk(NULL) = 0x555560a35000 brk(0x555560a35d40) = 0x555560a35d40 arch_prctl(ARCH_SET_FS, 0x555560a353c0) = 0 set_tid_address(0x555560a35690) = 5085 set_robust_list(0x555560a356a0, 24) = 0 rseq(0x555560a35ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4090488481", 4096) = 28 getrandom("\xef\x98\xc3\x1c\x24\x22\xdd\x25", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555560a35d40 brk(0x555560a56d40) = 0x555560a56d40 brk(0x555560a57000) = 0x555560a57000 mprotect(0x7fdcdd2bf000, 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() = 5085 openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 write(3, "10000000000", 11) = 11 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 write(3, "20", 2) = 2 close(3) = 0 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) newfstatat(1, "", {st_mode=S_IFIFO|0600, st_size=0, ...}, AT_EMPTY_PATH) = 0 [ 75.381683][ T29] audit: type=1400 audit(1717170349.614:87): avc: denied { execmem } for pid=5085 comm="syz-executor409" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 write(3, "100", 3) = 3 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 write(3, "7 4 1 3", 7) = 7 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 write(3, "1", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 write(3, "0", 1) = 1 close(3) = 0 openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 write(3, "5085", 4) = 4 close(3) = 0 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5086 attached , child_tidptr=0x555560a35690) = 5086 [pid 5086] set_robust_list(0x555560a356a0, 24) = 0 [pid 5086] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5086] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5086] setsid() = 1 [pid 5086] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5086] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5086] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5086] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5086] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5086] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5086] unshare(CLONE_NEWNS) = 0 [pid 5086] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [ 75.614458][ T29] audit: type=1400 audit(1717170349.844:88): avc: denied { mounton } for pid=5086 comm="syz-executor409" path="/sys/fs/fuse/connections" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=dir permissive=1 [ 75.638552][ T29] audit: type=1400 audit(1717170349.854:89): avc: denied { mount } for pid=5086 comm="syz-executor409" name="/" dev="fusectl" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fusefs_t tclass=filesystem permissive=1 [pid 5086] unshare(CLONE_NEWIPC) = 0 [pid 5086] unshare(CLONE_NEWCGROUP) = 0 [pid 5086] unshare(CLONE_NEWUTS) = 0 [pid 5086] unshare(CLONE_SYSVSEM) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "16777216", 8) = 8 [pid 5086] close(3) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "536870912", 9) = 9 [pid 5086] close(3) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "1024", 4) = 4 [pid 5086] close(3) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "8192", 4) = 4 [pid 5086] close(3) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "1024", 4) = 4 [ 75.683408][ T29] audit: type=1400 audit(1717170349.914:90): avc: denied { mounton } for pid=5086 comm="syz-executor409" path="/" dev="sda1" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:root_t tclass=dir permissive=1 [pid 5086] close(3) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "1024", 4) = 4 [pid 5086] close(3) = 0 [pid 5086] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5086] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5086] close(3) = 0 [pid 5086] getpid() = 1 [pid 5086] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< [pid 5089] set_robust_list(0x555560a356a0, 24 [pid 5086] <... clone resumed>, child_tidptr=0x555560a35690) = 2 [pid 5089] <... set_robust_list resumed>) = 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] write(1, "executing program\n", 18executing program ) = 18 [ 75.836033][ T29] audit: type=1400 audit(1717170350.074:91): avc: denied { mounton } for pid=5086 comm="syz-executor409" path="/dev/binderfs" dev="devtmpfs" ino=2322 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:device_t tclass=dir permissive=1 [ 75.859226][ T29] audit: type=1400 audit(1717170350.074:92): avc: denied { mount } for pid=5086 comm="syz-executor409" name="/" dev="binder" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5089] rt_sigaction(SIGRT_1, {sa_handler=0x7fdcdd26ae30, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7fdcdd25cc40}, NULL, 8) = 0 [pid 5089] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5089] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7fdcdd1d5000 [pid 5089] mprotect(0x7fdcdd1d6000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5089] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5089] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7fdcdd1f5990, parent_tid=0x7fdcdd1f5990, exit_signal=0, stack=0x7fdcdd1d5000, stack_size=0x20300, tls=0x7fdcdd1f56c0}./strace-static-x86_64: Process 5090 attached => {parent_tid=[3]}, 88) = 3 [pid 5090] rseq(0x7fdcdd1f5fe0, 0x20, 0, 0x53053053) = 0 [pid 5090] set_robust_list(0x7fdcdd1f59a0, 24) = 0 [pid 5089] rt_sigprocmask(SIG_SETMASK, [], [pid 5090] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5090] futex(0x7fdcdd2c5328, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5089] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5089] futex(0x7fdcdd2c5328, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5090] <... futex resumed>) = 0 [pid 5090] openat(AT_FDCWD, "/dev/nbd0", O_RDONLY) = 3 [pid 5090] futex(0x7fdcdd2c532c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5089] <... futex resumed>) = 0 [pid 5090] futex(0x7fdcdd2c5328, FUTEX_WAIT_PRIVATE, 0, NULL) = -1 EAGAIN (Resource temporarily unavailable) [pid 5089] futex(0x7fdcdd2c5328, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [ 75.985702][ T29] audit: type=1400 audit(1717170350.224:93): avc: denied { read } for pid=5089 comm="syz-executor409" name="nbd0" dev="devtmpfs" ino=664 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 76.009571][ T29] audit: type=1400 audit(1717170350.224:94): avc: denied { open } for pid=5089 comm="syz-executor409" path="/dev/nbd0" dev="devtmpfs" ino=664 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 5090] ioctl(3, NBD_SET_SIZE, 4294967040 [pid 5089] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5090] <... ioctl resumed>) = 0 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=0} [pid 5090] futex(0x7fdcdd2c532c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5089] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5090] <... futex resumed>) = 0 [pid 5089] futex(0x7fdcdd2c5328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5090] socketpair(AF_UNIX, SOCK_STREAM, 0, [pid 5089] <... futex resumed>) = 0 [pid 5090] <... socketpair resumed>[4, 5]) = 0 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5090] futex(0x7fdcdd2c532c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5089] <... futex resumed>) = 0 [pid 5090] <... futex resumed>) = 1 [pid 5089] futex(0x7fdcdd2c5328, FUTEX_WAKE_PRIVATE, 1000000 [pid 5090] ioctl(3, NBD_SET_SOCK, 4 [pid 5089] <... futex resumed>) = 0 [ 76.035164][ T29] audit: type=1400 audit(1717170350.254:95): avc: denied { ioctl } for pid=5089 comm="syz-executor409" path="/dev/nbd0" dev="devtmpfs" ino=664 ioctlcmd=0xab02 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5090] <... ioctl resumed>) = 0 [pid 5090] futex(0x7fdcdd2c532c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5089] <... futex resumed>) = 0 [pid 5089] futex(0x7fdcdd2c5328, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5089] futex(0x7fdcdd2c532c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5090] ioctl(3, NBD_DO_IT [pid 5089] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [ 76.174840][ T5090] nbd0: detected capacity change from 0 to 8388607 [pid 5089] close(3) = 0 [pid 5089] close(4) = 0 [pid 5089] close(5) = 0 [pid 5089] close(6) = -1 EBADF (Bad file descriptor) [pid 5089] close(7) = -1 EBADF (Bad file descriptor) [pid 5089] close(8) = -1 EBADF (Bad file descriptor) [pid 5089] close(9) = -1 EBADF (Bad file descriptor) [pid 5089] close(10) = -1 EBADF (Bad file descriptor) [pid 5089] close(11) = -1 EBADF (Bad file descriptor) [pid 5089] close(12) = -1 EBADF (Bad file descriptor) [pid 5089] close(13) = -1 EBADF (Bad file descriptor) [pid 5089] close(14) = -1 EBADF (Bad file descriptor) [pid 5089] close(15) = -1 EBADF (Bad file descriptor) [pid 5089] close(16) = -1 EBADF (Bad file descriptor) [pid 5089] close(17) = -1 EBADF (Bad file descriptor) [pid 5089] close(18) = -1 EBADF (Bad file descriptor) [pid 5089] close(19) = -1 EBADF (Bad file descriptor) [pid 5089] close(20) = -1 EBADF (Bad file descriptor) [pid 5089] close(21) = -1 EBADF (Bad file descriptor) [ 76.405104][ T4481] block nbd0: Receive control failed (result -104) [pid 5089] close(22) = -1 EBADF (Bad file descriptor) [pid 5089] close(23) = -1 EBADF (Bad file descriptor) [pid 5089] close(24) = -1 EBADF (Bad file descriptor) [pid 5089] close(25) = -1 EBADF (Bad file descriptor) [pid 5089] close(26) = -1 EBADF (Bad file descriptor) [pid 5089] close(27) = -1 EBADF (Bad file descriptor) [pid 5089] close(28) = -1 EBADF (Bad file descriptor) [pid 5089] close(29write to /proc/sys/net/core/bpf_jit_kallsyms failed: No such file or directory write to /proc/sys/net/core/bpf_jit_harden failed: No such file or directory ) = -1 EBADF (Bad file descriptor) [pid 5089] write(1, "write to /proc/sys/net/core/bpf_jit_kallsyms failed: No such file or directory\nwrite to /proc/sys/ne"..., 156) = 156 [pid 5089] exit_group(0) = ? [pid 5086] kill(-2, SIGKILL) = 0 [pid 5086] kill(2, SIGKILL) = 0 [pid 5086] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5086] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5086] getdents64(3, 0x555560a37740 /* 2 entries */, 32768) = 48 [pid 5086] getdents64(3, 0x555560a37740 /* 0 entries */, 32768) = 0 [pid 5086] close(3) = 0 [ 87.402484][ T45] cfg80211: failed to load regulatory.db [ 106.596267][ T58] block nbd0: Possible stuck request ffff888020678000: control (read@0,4096B). Runtime 30 seconds [ 136.675663][ T58] block nbd0: Possible stuck request ffff888020678000: control (read@0,4096B). Runtime 60 seconds [ 137.421314][ T4537] udevd[4537]: worker [5087] /devices/virtual/block/nbd0 is taking a long time [ 166.755094][ T58] block nbd0: Possible stuck request ffff888020678000: control (read@0,4096B). Runtime 90 seconds [ 196.835032][ T58] block nbd0: Possible stuck request ffff888020678000: control (read@0,4096B). Runtime 120 seconds [ 226.915053][ T58] block nbd0: Possible stuck request ffff888020678000: control (read@0,4096B). Runtime 150 seconds [ 239.076127][ T30] INFO: task syz-executor409:5090 blocked for more than 143 seconds. [ 239.084402][ T30] Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 [ 239.092492][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 239.101910][ T30] task:syz-executor409 state:D stack:26000 pid:5090 tgid:5089 ppid:5086 flags:0x00004006 [ 239.112216][ T30] Call Trace: [ 239.115555][ T30] [ 239.118485][ T30] __schedule+0xf15/0x5d00 [ 239.122926][ T30] ? __pfx___lock_acquire+0x10/0x10 [ 239.128172][ T30] ? __pfx___lock_acquire+0x10/0x10 [ 239.133413][ T30] ? __pfx___schedule+0x10/0x10 [ 239.138327][ T30] ? schedule+0x298/0x350 [ 239.142682][ T30] ? __pfx_lock_release+0x10/0x10 [ 239.147761][ T30] ? __mutex_lock+0x5b3/0x9c0 [ 239.152467][ T30] ? __mutex_trylock_common+0x78/0x250 [ 239.157993][ T30] schedule+0xe7/0x350 [ 239.162084][ T30] schedule_preempt_disabled+0x13/0x30 [ 239.167605][ T30] __mutex_lock+0x5b8/0x9c0 [ 239.172137][ T30] ? bdev_release+0x166/0x6f0 [ 239.176877][ T30] ? __pfx___mutex_lock+0x10/0x10 [ 239.181933][ T30] ? do_raw_spin_lock+0x12d/0x2c0 [ 239.187003][ T30] ? do_raw_spin_unlock+0x172/0x230 [ 239.192222][ T30] ? bdev_release+0x166/0x6f0 [ 239.197011][ T30] bdev_release+0x166/0x6f0 [ 239.201560][ T30] ? task_work_run+0x126/0x250 [ 239.206410][ T30] ? evm_file_release+0xd6/0x1d0 [ 239.211377][ T30] ? __pfx_blkdev_release+0x10/0x10 [ 239.216655][ T30] blkdev_release+0x15/0x20 [ 239.221170][ T30] __fput+0x408/0xbb0 [ 239.225212][ T30] task_work_run+0x14e/0x250 [ 239.229829][ T30] ? __pfx_task_work_run+0x10/0x10 [ 239.234996][ T30] ? __pfx_task_work_add+0x10/0x10 [ 239.240161][ T30] ? __pfx_blkdev_ioctl+0x10/0x10 [ 239.245240][ T30] ? selinux_file_ioctl+0xb4/0x270 [ 239.250373][ T30] ptrace_notify+0x10e/0x130 [ 239.255021][ T30] syscall_exit_to_user_mode_prepare+0x126/0x260 [ 239.261396][ T30] syscall_exit_to_user_mode+0x11/0x2a0 [ 239.267001][ T30] do_syscall_64+0xda/0x250 [ 239.271555][ T30] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 239.277504][ T30] RIP: 0033:0x7fdcdd2451a9 [ 239.281940][ T30] RSP: 002b:00007fdcdd1f5218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 239.290421][ T30] RAX: 0000000000000000 RBX: 00007fdcdd2c5328 RCX: 00007fdcdd2451a9 [ 239.298454][ T30] RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003 [ 239.306468][ T30] RBP: 00007fdcdd2c5320 R08: 0000000000000000 R09: 0000000000000000 [ 239.314451][ T30] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fdcdd2c532c [ 239.322495][ T30] R13: 00007fdcdd2923b4 R14: 64626e2f7665642f R15: 00000000ffffff00 [ 239.330515][ T30] [ 239.333543][ T30] [ 239.333543][ T30] Showing all locks held in the system: [ 239.341390][ T30] 1 lock held by khungtaskd/30: [ 239.346311][ T30] #0: ffffffff8dbb18e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 [ 239.356315][ T30] 6 locks held by kworker/u8:8/2800: [ 239.361626][ T30] 2 locks held by getty/4840: [ 239.366490][ T30] #0: ffff88802ad970a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 [ 239.376336][ T30] #1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 [ 239.386482][ T30] 1 lock held by udevd/5087: [ 239.391080][ T30] #0: ffff8880205464c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x41a/0xe50 [ 239.400452][ T30] 1 lock held by syz-executor409/5090: [ 239.405954][ T30] #0: ffff8880205464c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x166/0x6f0 [ 239.415583][ T30] [ 239.417911][ T30] ============================================= [ 239.417911][ T30] [ 239.426364][ T30] NMI backtrace for cpu 0 [ 239.430702][ T30] CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 [ 239.440582][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 239.450624][ T30] Call Trace: [ 239.453898][ T30] [ 239.456819][ T30] dump_stack_lvl+0x116/0x1f0 [ 239.461497][ T30] nmi_cpu_backtrace+0x27b/0x390 [ 239.466440][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 239.472431][ T30] nmi_trigger_cpumask_backtrace+0x29c/0x300 [ 239.478417][ T30] watchdog+0xf86/0x1240 [ 239.482654][ T30] ? __pfx_watchdog+0x10/0x10 [ 239.487347][ T30] ? lockdep_hardirqs_on+0x7c/0x110 [ 239.492587][ T30] ? __kthread_parkme+0x148/0x220 [ 239.497638][ T30] ? __pfx_watchdog+0x10/0x10 [ 239.502328][ T30] kthread+0x2c1/0x3a0 [ 239.506409][ T30] ? _raw_spin_unlock_irq+0x23/0x50 [ 239.511620][ T30] ? __pfx_kthread+0x10/0x10 [ 239.516232][ T30] ret_from_fork+0x45/0x80 [ 239.520664][ T30] ? __pfx_kthread+0x10/0x10 [ 239.525261][ T30] ret_from_fork_asm+0x1a/0x30 [ 239.530041][ T30] [ 239.533208][ T30] Sending NMI from CPU 0 to CPUs 1: [ 239.538488][ C1] NMI backtrace for cpu 1 [ 239.538500][ C1] CPU: 1 PID: 4526 Comm: klogd Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 [ 239.538522][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 239.538533][ C1] RIP: 0010:import_ubuf+0x0/0x200 [ 239.538564][ C1] Code: 00 31 d2 50 31 f6 48 c7 c7 e0 18 bb 8d e8 48 b7 ea fc 58 c3 cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 57 41 56 41 55 49 89 f5 41 54 41 89 fc 55 48 89 d5 [ 239.538582][ C1] RSP: 0018:ffffc90003aafd00 EFLAGS: 00000246 [ 239.538599][ C1] RAX: 0000000000000000 RBX: 00005650700458b0 RCX: ffffc90003aafd78 [ 239.538613][ C1] RDX: 000000000000008b RSI: 00005650700458b0 RDI: 0000000000000001 [ 239.538625][ C1] RBP: 1ffff92000755fa3 R08: 0000000000000000 R09: 0000000000000000 [ 239.538643][ C1] R10: 1ffff92000755ff9 R11: 0000000000000000 R12: 0000000000000003 [ 239.538657][ C1] R13: 0000000000000000 R14: ffffc90003aafd68 R15: ffffc90003aafdf8 [ 239.538670][ C1] FS: 00007f68fd3aa380(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 [ 239.538691][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 239.538706][ C1] CR2: 000055f52d8a9600 CR3: 000000002d45e000 CR4: 00000000003506f0 [ 239.538719][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 239.538731][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 239.538744][ C1] Call Trace: [ 239.538751][ C1] [ 239.538758][ C1] ? show_regs+0x8c/0xa0 [ 239.538785][ C1] ? nmi_cpu_backtrace+0x1d8/0x390 [ 239.538808][ C1] ? nmi_cpu_backtrace_handler+0xc/0x20 [ 239.538834][ C1] ? nmi_handle+0x1a9/0x5c0 [ 239.538860][ C1] ? __pfx_import_ubuf+0x10/0x10 [ 239.538884][ C1] ? default_do_nmi+0x6a/0x160 [ 239.538908][ C1] ? exc_nmi+0x170/0x1e0 [ 239.538930][ C1] ? end_repeat_nmi+0xf/0x53 [ 239.538956][ C1] ? __pfx_import_ubuf+0x10/0x10 [ 239.538979][ C1] ? __pfx_import_ubuf+0x10/0x10 [ 239.539003][ C1] ? __pfx_import_ubuf+0x10/0x10 [ 239.539026][ C1] [ 239.539032][ C1] [ 239.539039][ C1] __sys_sendto+0xe0/0x4e0 [ 239.539074][ C1] ? __pfx___sys_sendto+0x10/0x10 [ 239.539100][ C1] ? __pfx_lock_release+0x10/0x10 [ 239.539130][ C1] ? rcu_is_watching+0x12/0xc0 [ 239.539154][ C1] __x64_sys_sendto+0xe0/0x1c0 [ 239.539181][ C1] ? do_syscall_64+0x91/0x250 [ 239.539200][ C1] ? lockdep_hardirqs_on+0x7c/0x110 [ 239.539228][ C1] do_syscall_64+0xcd/0x250 [ 239.539247][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 239.539271][ C1] RIP: 0033:0x7f68fd50c9b5 [ 239.539286][ C1] Code: 8b 44 24 08 48 83 c4 28 48 98 c3 48 98 c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 26 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 7a 48 8b 15 44 c4 0c 00 f7 d8 64 89 02 48 83 [ 239.539304][ C1] RSP: 002b:00007ffe882fb4a8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 239.539322][ C1] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f68fd50c9b5 [ 239.539336][ C1] RDX: 000000000000008b RSI: 00005650700458b0 RDI: 0000000000000003 [ 239.539348][ C1] RBP: 000056507003f2c0 R08: 0000000000000000 R09: 0000000000000000 [ 239.539361][ C1] R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000013 [ 239.539374][ C1] R13: 00007f68fd69a212 R14: 00007ffe882fb5a8 R15: 0000000000000000 [ 239.539389][ C1] [ 239.539572][ T30] Kernel panic - not syncing: hung_task: blocked tasks [ 239.863733][ T30] CPU: 0 PID: 30 Comm: khungtaskd Not tainted 6.10.0-rc1-syzkaller-00027-g4a4be1ad3a6e #0 [ 239.873629][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 [ 239.883685][ T30] Call Trace: [ 239.886970][ T30] [ 239.889902][ T30] dump_stack_lvl+0x3d/0x1f0 [ 239.894512][ T30] panic+0x6f5/0x7a0 [ 239.898426][ T30] ? __pfx_panic+0x10/0x10 [ 239.902858][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 239.908235][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 239.914226][ T30] ? preempt_schedule_thunk+0x1a/0x30 [ 239.919604][ T30] ? watchdog+0xd3d/0x1240 [ 239.924029][ T30] ? watchdog+0xd30/0x1240 [ 239.928453][ T30] watchdog+0xd4e/0x1240 [ 239.932704][ T30] ? __pfx_watchdog+0x10/0x10 [ 239.937384][ T30] ? lockdep_hardirqs_on+0x7c/0x110 [ 239.942597][ T30] ? __kthread_parkme+0x148/0x220 [ 239.947632][ T30] ? __pfx_watchdog+0x10/0x10 [ 239.952320][ T30] kthread+0x2c1/0x3a0 [ 239.956398][ T30] ? _raw_spin_unlock_irq+0x23/0x50 [ 239.961607][ T30] ? __pfx_kthread+0x10/0x10 [ 239.966203][ T30] ret_from_fork+0x45/0x80 [ 239.970633][ T30] ? __pfx_kthread+0x10/0x10 [ 239.975229][ T30] ret_from_fork_asm+0x1a/0x30 [ 239.980010][ T30] [ 239.983258][ T30] Kernel Offset: disabled [ 239.987573][ T30] Rebooting in 86400 seconds..