./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2111181659 <...> Warning: Permanently added '10.128.0.152' (ED25519) to the list of known hosts. execve("./syz-executor2111181659", ["./syz-executor2111181659"], 0x7ffe23ebf340 /* 10 vars */) = 0 brk(NULL) = 0x55555edde000 brk(0x55555eddee00) = 0x55555eddee00 arch_prctl(ARCH_SET_FS, 0x55555edde480) = 0 set_tid_address(0x55555edde750) = 5849 set_robust_list(0x55555edde760, 24) = 0 rseq(0x55555eddeda0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2111181659", 4096) = 28 getrandom("\x24\x62\x5e\x2c\x08\x5d\x81\x35", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555eddee00 brk(0x55555edffe00) = 0x55555edffe00 brk(0x55555ee00000) = 0x55555ee00000 mprotect(0x7f8632314000, 16384, PROT_READ) = 0 mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000 mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5850 attached [pid 5850] set_robust_list(0x55555edde760, 24 [pid 5849] <... clone resumed>, child_tidptr=0x55555edde750) = 5850 [pid 5850] <... set_robust_list resumed>) = 0 [pid 5849] openat(AT_FDCWD, "/sys/kernel/debug/x86/nmi_longest_ns", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "10000000000", 11) = 11 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/hung_task_check_interval_secs", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "20", 2) = 2 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_kallsyms", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/net/core/bpf_jit_harden", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "0", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/kptr_restrict", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "0", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/softlockup_all_cpu_backtrace", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "100", 3) = 3 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/vm/oom_dump_tasks", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "0", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/debug/exception-trace", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "0", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/printk", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "7 4 1 3", 7) = 7 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/keys/gc_delay", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/vm/oom_kill_allocating_task", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/ctrl-alt-del", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "0", 1) = 1 [pid 5849] close(3) = 0 [pid 5849] openat(AT_FDCWD, "/proc/sys/kernel/cad_pid", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "5850", 4) = 4 [pid 5849] close(3) = 0 [pid 5849] kill(5850, SIGKILL) = 0 [pid 5850] +++ killed by SIGKILL +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5850, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=1 /* 0.01 s */} --- rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7f863225a0a0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f8632262e60}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f863225a0a0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f8632262e60}, NULL, 8) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5852 attached , child_tidptr=0x55555edde750) = 5852 [pid 5852] set_robust_list(0x55555edde760, 24) = 0 [pid 5852] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5852] setpgid(0, 0) = 0 [pid 5852] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5852] write(3, "1000", 4) = 4 [pid 5852] close(3) = 0 [pid 5852] write(1, "executing program\n", 18executing program ) = 18 [pid 5852] futex(0x7f863231a6cc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5852] rt_sigaction(SIGRT_1, {sa_handler=0x7f86322b9400, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f8632262e60}, NULL, 8) = 0 [pid 5852] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8632227000 [pid 5852] mprotect(0x7f8632228000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5852] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5852] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8632247990, parent_tid=0x7f8632247990, exit_signal=0, stack=0x7f8632227000, stack_size=0x20240, tls=0x7f86322476c0}./strace-static-x86_64: Process 5853 attached => {parent_tid=[5853]}, 88) = 5853 [pid 5852] rt_sigprocmask(SIG_SETMASK, [], [pid 5853] rseq(0x7f8632247fe0, 0x20, 0, 0x53053053 [pid 5852] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5853] <... rseq resumed>) = 0 [pid 5852] futex(0x7f863231a6c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] set_robust_list(0x7f86322479a0, 24) = 0 [pid 5852] <... futex resumed>) = 0 [pid 5853] rt_sigprocmask(SIG_SETMASK, [], [pid 5852] futex(0x7f863231a6cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5853] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5853] memfd_create("syzkaller", 0) = 3 [pid 5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f8629e00000 [pid 5853] 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"..., 524288) = 524288 [pid 5853] munmap(0x7f8629e00000, 138412032) = 0 [pid 5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5853] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5853] close(3) = 0 [pid 5853] close(4) = 0 [pid 5853] mkdir("./file2", 0777) = 0 [ 187.886627][ T5853] loop0: detected capacity change from 0 to 1024 [ 187.932264][ T5853] ======================================================= [ 187.932264][ T5853] WARNING: The mand mount option has been deprecated and [ 187.932264][ T5853] and is ignored by this kernel. Remove the mand [ 187.932264][ T5853] option from the mount to silence this warning. [ 187.932264][ T5853] ======================================================= [ 187.967283][ T5853] EXT4-fs: Ignoring removed oldalloc option [ 187.973466][ T5853] EXT4-fs: Ignoring removed orlov option [pid 5853] mount("/dev/loop0", "./file2", "ext4", MS_NOSUID|MS_NODEV|MS_MANDLOCK|MS_STRICTATIME|MS_LAZYTIME, "debug_want_extra_isize=0x0000000000000080,grpjquota=,oldalloc,errors=remount-ro,orlov,usrquota,strip"...) = 0 [pid 5853] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5853] chdir("./file2") = 0 [pid 5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5853] futex(0x7f863231a6cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5852] <... futex resumed>) = 0 [pid 5853] futex(0x7f863231a6c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5852] futex(0x7f863231a6c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] <... futex resumed>) = 0 [pid 5852] <... futex resumed>) = 1 [pid 5853] renameat2(AT_FDCWD, "./file0/file0", AT_FDCWD, "./file1", RENAME_WHITEOUT [pid 5852] futex(0x7f863231a6cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5853] <... renameat2 resumed>) = 0 [pid 5853] futex(0x7f863231a6cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5853] futex(0x7f863231a6c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5852] <... futex resumed>) = 0 [pid 5853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5852] futex(0x7f863231a6c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] mkdir("./bus", 0777 [pid 5852] <... futex resumed>) = 0 [pid 5852] futex(0x7f863231a6cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5853] <... mkdir resumed>) = 0 [pid 5853] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5853] futex(0x7f863231a6cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5852] <... futex resumed>) = 0 [pid 5853] futex(0x7f863231a6c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5852] futex(0x7f863231a6c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5853] open("./bus", O_RDONLY [pid 5852] <... futex resumed>) = 0 [pid 5852] futex(0x7f863231a6cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5853] <... open resumed>) = 4 [ 187.979997][ T5853] EXT4-fs (loop0): stripe (1570) is not aligned with cluster size (16), stripe is disabled [ 188.004211][ T5853] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5853] futex(0x7f863231a6cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5853] futex(0x7f863231a6c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5852] <... futex resumed>) = 0 [pid 5852] futex(0x7f863231a6c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] <... futex resumed>) = 0 [pid 5852] <... futex resumed>) = 1 [pid 5853] chdir("./bus" [pid 5852] futex(0x7f863231a6cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5853] <... chdir resumed>) = 0 [pid 5853] futex(0x7f863231a6cc, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5852] <... futex resumed>) = 0 [pid 5853] futex(0x7f863231a6c8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5852] futex(0x7f863231a6c8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5852] <... futex resumed>) = 0 [pid 5853] mknodat(4, "./bus", S_ISGID|000 [pid 5852] futex(0x7f863231a6cc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5852] futex(0x7f863231a6dc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5852] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f8632206000 [pid 5852] mprotect(0x7f8632207000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5852] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5852] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f8632226990, parent_tid=0x7f8632226990, exit_signal=0, stack=0x7f8632206000, stack_size=0x20240, tls=0x7f86322266c0}./strace-static-x86_64: Process 5857 attached [pid 5857] rseq(0x7f8632226fe0, 0x20, 0, 0x53053053 [pid 5852] <... clone3 resumed> => {parent_tid=[5857]}, 88) = 5857 [pid 5857] <... rseq resumed>) = 0 [pid 5857] set_robust_list(0x7f86322269a0, 24 [pid 5852] rt_sigprocmask(SIG_SETMASK, [], [pid 5857] <... set_robust_list resumed>) = 0 [pid 5852] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5857] rt_sigprocmask(SIG_SETMASK, [], [pid 5852] futex(0x7f863231a6d8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5857] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5852] <... futex resumed>) = 0 [pid 5857] rename("./bus", "./file0" [pid 5852] futex(0x7f863231a6dc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5852] exit_group(0) = ? [pid 5849] kill(-5852, SIGKILL) = 0 [pid 5849] kill(5852, SIGKILL) = 0 [pid 5849] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5849] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5849] getdents64(3, 0x55555eddf7f0 /* 2 entries */, 32768) = 48 [pid 5849] getdents64(3, 0x55555eddf7f0 /* 0 entries */, 32768) = 0 [pid 5849] close(3) = 0 [ 351.129861][ T31] INFO: task syz-executor211:5857 blocked for more than 143 seconds. [ 351.137949][ T31] Not tainted 6.15.0-syzkaller-10820-gcd2e103d57e5 #0 [ 351.145448][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 351.154346][ T31] task:syz-executor211 state:D stack:28856 pid:5857 tgid:5852 ppid:5849 task_flags:0x400040 flags:0x00004006 [ 351.166355][ T31] Call Trace: [ 351.169628][ T31] [ 351.172705][ T31] __schedule+0x16a2/0x4cb0 [ 351.177232][ T31] ? __pfx_preempt_schedule_notrace+0x10/0x10 [ 351.183428][ T31] ? schedule+0x165/0x360 [ 351.187751][ T31] ? __pfx___schedule+0x10/0x10 [ 351.192728][ T31] ? schedule+0x91/0x360 [ 351.196964][ T31] schedule+0x165/0x360 [ 351.201252][ T31] schedule_preempt_disabled+0x13/0x30 [ 351.206699][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 351.212537][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 351.218433][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 351.225280][ T31] ? __lock_acquire+0xab9/0xd20 [ 351.230243][ T31] ? do_renameat2+0x3dd/0xc50 [ 351.234927][ T31] down_write_nested+0x1b5/0x200 [ 351.239989][ T31] ? __pfx_down_write_nested+0x10/0x10 [ 351.245444][ T31] ? mnt_get_write_access+0x223/0x2a0 [ 351.250945][ T31] do_renameat2+0x3dd/0xc50 [ 351.255450][ T31] ? __pfx_do_renameat2+0x10/0x10 [ 351.260920][ T31] ? strncpy_from_user+0x150/0x290 [ 351.266034][ T31] ? getname_flags+0x1e5/0x540 [ 351.270974][ T31] __x64_sys_rename+0x82/0x90 [ 351.275642][ T31] do_syscall_64+0xfa/0x3b0 [ 351.280264][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 351.286316][ T31] ? __switch_to_asm+0x39/0x70 [ 351.291277][ T31] ? clear_bhb_loop+0x60/0xb0 [ 351.295953][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 351.301962][ T31] RIP: 0033:0x7f8632293739 [ 351.306364][ T31] RSP: 002b:00007f8632226168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 351.314897][ T31] RAX: ffffffffffffffda RBX: 00007f863231a6d8 RCX: 00007f8632293739 [ 351.322967][ T31] RDX: 00007f863226cdf6 RSI: 0000200000000180 RDI: 00002000000003c0 [ 351.331020][ T31] RBP: 00007f863231a6d0 R08: 00007fffd7fce227 R09: 0000000000000000 [ 351.338986][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f863231a6dc [ 351.347104][ T31] R13: 000000000000006e R14: 00007fffd7fce140 R15: 00007fffd7fce228 [ 351.355171][ T31] [ 351.358185][ T31] [ 351.358185][ T31] Showing all locks held in the system: [ 351.366190][ T31] 1 lock held by khungtaskd/31: [ 351.371436][ T31] #0: ffffffff8e13d080 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 351.381401][ T31] 2 locks held by getty/5580: [ 351.386061][ T31] #0: ffff8880352820a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 351.395927][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 351.406144][ T31] 3 locks held by syz-executor211/5853: [ 351.411766][ T31] 2 locks held by syz-executor211/5857: [ 351.417293][ T31] #0: ffff888071d28428 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 351.426612][ T31] #1: ffff88807dc83d40 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: do_renameat2+0x3dd/0xc50 [ 351.437132][ T31] [ 351.439449][ T31] ============================================= [ 351.439449][ T31] [ 351.448020][ T31] NMI backtrace for cpu 0 [ 351.448029][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-syzkaller-10820-gcd2e103d57e5 #0 PREEMPT(full) [ 351.448041][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 351.448047][ T31] Call Trace: [ 351.448051][ T31] [ 351.448056][ T31] dump_stack_lvl+0x189/0x250 [ 351.448074][ T31] ? __wake_up_klogd+0xd9/0x110 [ 351.448092][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 351.448107][ T31] ? __pfx__printk+0x10/0x10 [ 351.448126][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 351.448139][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 351.448149][ T31] ? _printk+0xcf/0x120 [ 351.448162][ T31] ? __pfx__printk+0x10/0x10 [ 351.448174][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 351.448187][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 351.448200][ T31] watchdog+0xfee/0x1030 [ 351.448213][ T31] ? watchdog+0x1de/0x1030 [ 351.448229][ T31] kthread+0x711/0x8a0 [ 351.448248][ T31] ? __pfx_watchdog+0x10/0x10 [ 351.448258][ T31] ? __pfx_kthread+0x10/0x10 [ 351.448274][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 351.448286][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 351.448297][ T31] ? __pfx_kthread+0x10/0x10 [ 351.448313][ T31] ret_from_fork+0x3fc/0x770 [ 351.448327][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 351.448342][ T31] ? __switch_to_asm+0x39/0x70 [ 351.448351][ T31] ? __switch_to_asm+0x33/0x70 [ 351.448360][ T31] ? __pfx_kthread+0x10/0x10 [ 351.448376][ T31] ret_from_fork_asm+0x1a/0x30 [ 351.448396][ T31] [ 351.448400][ T31] Sending NMI from CPU 0 to CPUs 1: [ 351.604144][ C1] NMI backtrace for cpu 1 [ 351.604155][ C1] CPU: 1 UID: 0 PID: 5853 Comm: syz-executor211 Not tainted 6.15.0-syzkaller-10820-gcd2e103d57e5 #0 PREEMPT(full) [ 351.604166][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 351.604171][ C1] RIP: 0010:errseq_check+0x47/0x80 [ 351.604185][ C1] Code: 00 00 00 fc ff df 0f b6 04 08 84 c0 75 32 41 8b 2e 89 ef 89 de e8 69 57 07 fd 39 dd 75 13 e8 a0 55 07 fd 31 ed 89 e8 5b 41 5e <5d> e9 d3 55 a7 06 cc e8 8d 55 07 fd 81 e5 ff 0f 00 00 f7 dd eb e5 [ 351.604192][ C1] RSP: 0018:ffffc9000456f530 EFLAGS: 00000246 [ 351.604202][ C1] RAX: 0000000000000000 RBX: ffff888148c94ea8 RCX: ffff888072668000 [ 351.604208][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 351.604213][ C1] RBP: 0000000000000000 R08: ffff88807dfaa1d0 R09: 0000000000000001 [ 351.604219][ C1] R10: dffffc0000000000 R11: fffffbfff1f3f25f R12: ffff888071d28000 [ 351.604225][ C1] R13: ffff88807229c000 R14: ffff88807229cbd0 R15: dffffc0000000000 [ 351.604231][ C1] FS: 00007f86322476c0(0000) GS:ffff888125d95000(0000) knlGS:0000000000000000 [ 351.604239][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 351.604245][ C1] CR2: 000056397f7d0660 CR3: 000000007432e000 CR4: 00000000003526f0 [ 351.604255][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 351.604260][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 351.604265][ C1] Call Trace: [ 351.604270][ C1] [ 351.604274][ C1] __ext4_journal_get_write_access+0x138/0x570 [ 351.604287][ C1] ? __pfx___ext4_journal_get_write_access+0x10/0x10 [ 351.604296][ C1] ? rcu_is_watching+0x15/0xb0 [ 351.604307][ C1] ? __mark_inode_dirty+0x3ab/0xdf0 [ 351.604320][ C1] ext4_xattr_block_set+0x12f3/0x2ac0 [ 351.604342][ C1] ? __pfx_ext4_xattr_block_set+0x10/0x10 [ 351.604354][ C1] ? ext4_xattr_ibody_set+0x100/0x6a0 [ 351.604365][ C1] ? ext4_reserve_inode_write+0x2ef/0x360 [ 351.604376][ C1] ext4_xattr_set_handle+0xdfb/0x1590 [ 351.604392][ C1] ? __pfx_ext4_xattr_set_handle+0x10/0x10 [ 351.604406][ C1] ? smack_inode_init_security+0x631/0x760 [ 351.604417][ C1] ext4_initxattrs+0x9f/0x110 [ 351.604429][ C1] security_inode_init_security+0x29d/0x3f0 [ 351.604439][ C1] ? __pfx_ext4_initxattrs+0x10/0x10 [ 351.604450][ C1] ? __pfx_security_inode_init_security+0x10/0x10 [ 351.604459][ C1] ? _raw_spin_unlock+0x28/0x50 [ 351.604469][ C1] ? insert_inode_locked+0x39a/0x410 [ 351.604481][ C1] __ext4_new_inode+0x3257/0x3c50 [ 351.604495][ C1] ? __pfx___ext4_new_inode+0x10/0x10 [ 351.604505][ C1] ? __pfx___dquot_initialize+0x10/0x10 [ 351.604514][ C1] ? smk_tskacc+0x2fc/0x370 [ 351.604525][ C1] ext4_create+0x22d/0x460 [ 351.604540][ C1] ? __pfx_ext4_create+0x10/0x10 [ 351.604551][ C1] ? bpf_lsm_inode_create+0x9/0x20 [ 351.604561][ C1] vfs_create+0x24b/0x400 [ 351.604574][ C1] do_mknodat+0x3c6/0x4d0 [ 351.604586][ C1] ? __pfx_do_mknodat+0x10/0x10 [ 351.604597][ C1] ? getname_flags+0x1e5/0x540 [ 351.604608][ C1] __x64_sys_mknodat+0xa7/0xc0 [ 351.604621][ C1] do_syscall_64+0xfa/0x3b0 [ 351.604632][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 351.604641][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 351.604650][ C1] ? clear_bhb_loop+0x60/0xb0 [ 351.604659][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 351.604668][ C1] RIP: 0033:0x7f8632293739 [ 351.604675][ C1] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 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 [ 351.604682][ C1] RSP: 002b:00007f8632247168 EFLAGS: 00000246 ORIG_RAX: 0000000000000103 [ 351.604691][ C1] RAX: ffffffffffffffda RBX: 00007f863231a6c8 RCX: 00007f8632293739 [ 351.604697][ C1] RDX: 0000000000000400 RSI: 0000200000000180 RDI: 0000000000000004 [ 351.604702][ C1] RBP: 00007f863231a6c0 R08: 00007f86322476c0 R09: 0000000000000000 [ 351.604708][ C1] R10: 0000000000000103 R11: 0000000000000246 R12: 00007f863231a6cc [ 351.604713][ C1] R13: 0000000000000006 R14: 00007fffd7fce140 R15: 00007fffd7fce228 [ 351.604724][ C1] [ 351.605144][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 352.006451][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-syzkaller-10820-gcd2e103d57e5 #0 PREEMPT(full) [ 352.017877][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 352.027907][ T31] Call Trace: [ 352.031165][ T31] [ 352.034074][ T31] dump_stack_lvl+0x99/0x250 [ 352.038644][ T31] ? __asan_memcpy+0x40/0x70 [ 352.043223][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 352.048408][ T31] ? __pfx__printk+0x10/0x10 [ 352.052980][ T31] panic+0x2db/0x790 [ 352.056857][ T31] ? __pfx_panic+0x10/0x10 [ 352.061254][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 352.067048][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 352.072400][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 352.078535][ T31] watchdog+0x102d/0x1030 [ 352.082844][ T31] ? watchdog+0x1de/0x1030 [ 352.087242][ T31] kthread+0x711/0x8a0 [ 352.091293][ T31] ? __pfx_watchdog+0x10/0x10 [ 352.095948][ T31] ? __pfx_kthread+0x10/0x10 [ 352.100517][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 352.105704][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 352.110880][ T31] ? __pfx_kthread+0x10/0x10 [ 352.115447][ T31] ret_from_fork+0x3fc/0x770 [ 352.120014][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 352.125101][ T31] ? __switch_to_asm+0x39/0x70 [ 352.129837][ T31] ? __switch_to_asm+0x33/0x70 [ 352.134573][ T31] ? __pfx_kthread+0x10/0x10 [ 352.139141][ T31] ret_from_fork_asm+0x1a/0x30 [ 352.143887][ T31] [ 352.146985][ T31] Kernel Offset: disabled [ 352.151292][ T31] Rebooting in 86400 seconds..