./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1255052551 <...> Warning: Permanently added '10.128.1.167' (ED25519) to the list of known hosts. execve("./syz-executor1255052551", ["./syz-executor1255052551"], 0x7fff19e1e6b0 /* 10 vars */) = 0 brk(NULL) = 0x55557c89e000 brk(0x55557c89ee00) = 0x55557c89ee00 arch_prctl(ARCH_SET_FS, 0x55557c89e480) = 0 set_tid_address(0x55557c89e750) = 5846 set_robust_list(0x55557c89e760, 24) = 0 rseq(0x55557c89eda0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1255052551", 4096) = 28 getrandom("\x39\xa6\x90\x02\xcd\xf9\x5c\x80", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55557c89ee00 brk(0x55557c8bfe00) = 0x55557c8bfe00 brk(0x55557c8c0000) = 0x55557c8c0000 mprotect(0x7f58ce4d8000, 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 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=0x7f58ce41dd70, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f58ce426c70}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f58ce41dd70, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f58ce426c70}, 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 5847 attached [pid 5847] set_robust_list(0x55557c89e760, 24) = 0 [pid 5847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5846] <... clone resumed>, child_tidptr=0x55557c89e750) = 5847 [pid 5847] setpgid(0, 0) = 0 [pid 5847] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5847] write(3, "1000", 4) = 4 [pid 5847] close(3) = 0 executing program [pid 5847] write(1, "executing program\n", 18) = 18 [pid 5847] futex(0x7f58ce4de6ac, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5847] rt_sigaction(SIGRT_1, {sa_handler=0x7f58ce47d150, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f58ce426c70}, NULL, 8) = 0 [pid 5847] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5847] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f58ce3eb000 [pid 5847] mprotect(0x7f58ce3ec000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5847] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5847] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f58ce40b990, parent_tid=0x7f58ce40b990, exit_signal=0, stack=0x7f58ce3eb000, stack_size=0x20240, tls=0x7f58ce40b6c0}./strace-static-x86_64: Process 5849 attached [pid 5849] rseq(0x7f58ce40bfe0, 0x20, 0, 0x53053053 [pid 5847] <... clone3 resumed> => {parent_tid=[5849]}, 88) = 5849 [pid 5849] <... rseq resumed>) = 0 [pid 5847] rt_sigprocmask(SIG_SETMASK, [], [pid 5849] set_robust_list(0x7f58ce40b9a0, 24 [pid 5847] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5849] <... set_robust_list resumed>) = 0 [pid 5849] rt_sigprocmask(SIG_SETMASK, [], [pid 5847] futex(0x7f58ce4de6a8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5849] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5847] <... futex resumed>) = 0 [pid 5849] memfd_create("syzkaller", 0 [pid 5847] futex(0x7f58ce4de6ac, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5849] <... memfd_create resumed>) = 3 [pid 5849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f58c5e00000 [pid 5849] 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 5849] munmap(0x7f58c5e00000, 138412032) = 0 [pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5849] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5849] close(3) = 0 [pid 5849] close(4) = 0 [pid 5849] mkdir("./file2", 0777) = 0 [ 178.639487][ T5849] loop0: detected capacity change from 0 to 1024 [ 178.666221][ T5849] ======================================================= [ 178.666221][ T5849] WARNING: The mand mount option has been deprecated and [ 178.666221][ T5849] and is ignored by this kernel. Remove the mand [ 178.666221][ T5849] option from the mount to silence this warning. [ 178.666221][ T5849] ======================================================= [ 178.701799][ T5849] EXT4-fs: Ignoring removed oldalloc option [ 178.708609][ T5849] EXT4-fs: Ignoring removed orlov option [ 178.716450][ T5849] EXT4-fs (loop0): stripe (1570) is not aligned with cluster size (16), stripe is disabled [pid 5849] 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 5849] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5849] chdir("./file2") = 0 [pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5849] futex(0x7f58ce4de6ac, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5847] <... futex resumed>) = 0 [pid 5849] futex(0x7f58ce4de6a8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5847] futex(0x7f58ce4de6a8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5849] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5847] <... futex resumed>) = 0 [pid 5849] renameat2(AT_FDCWD, "./file0/file0", AT_FDCWD, "./file1", RENAME_WHITEOUT [ 178.742518][ T5849] EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. [pid 5847] futex(0x7f58ce4de6ac, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5849] <... renameat2 resumed>) = 0 [pid 5849] futex(0x7f58ce4de6ac, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5849] futex(0x7f58ce4de6a8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5847] <... futex resumed>) = 0 [pid 5847] futex(0x7f58ce4de6a8, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5849] <... futex resumed>) = 0 [pid 5847] futex(0x7f58ce4de6ac, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5849] mkdir("./bus", 0777) = 0 [pid 5849] --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- [pid 5849] futex(0x7f58ce4de6ac, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5849] futex(0x7f58ce4de6a8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5847] <... futex resumed>) = 0 [pid 5847] futex(0x7f58ce4de6a8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5849] <... futex resumed>) = 0 [pid 5847] <... futex resumed>) = 1 [pid 5847] futex(0x7f58ce4de6ac, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5849] rename("./file0/file0", "./file0/file1") = 0 [pid 5849] futex(0x7f58ce4de6ac, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5849] futex(0x7f58ce4de6a8, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5847] <... futex resumed>) = 0 [pid 5847] futex(0x7f58ce4de6a8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5849] <... futex resumed>) = 0 [pid 5847] <... futex resumed>) = 1 [pid 5849] openat(AT_FDCWD, "./file0/file0", O_RDWR|O_CREAT|O_SYNC, 001 [pid 5847] futex(0x7f58ce4de6ac, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5847] futex(0x7f58ce4de6bc, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5847] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f58ce3ca000 [pid 5847] mprotect(0x7f58ce3cb000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5847] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5847] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f58ce3ea990, parent_tid=0x7f58ce3ea990, exit_signal=0, stack=0x7f58ce3ca000, stack_size=0x20240, tls=0x7f58ce3ea6c0}./strace-static-x86_64: Process 5853 attached [pid 5853] rseq(0x7f58ce3eafe0, 0x20, 0, 0x53053053 [pid 5847] <... clone3 resumed> => {parent_tid=[5853]}, 88) = 5853 [pid 5853] <... rseq resumed>) = 0 [pid 5847] rt_sigprocmask(SIG_SETMASK, [], [pid 5853] set_robust_list(0x7f58ce3ea9a0, 24 [pid 5847] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5853] <... set_robust_list resumed>) = 0 [pid 5847] futex(0x7f58ce4de6b8, FUTEX_WAKE_PRIVATE, 1000000 [pid 5853] rt_sigprocmask(SIG_SETMASK, [], [pid 5847] <... futex resumed>) = 0 [pid 5853] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5847] futex(0x7f58ce4de6bc, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5853] rename("./file1", "./file0/file0" [pid 5847] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5847] exit_group(0) = ? [pid 5846] kill(-5847, SIGKILL) = 0 [pid 5846] kill(5847, SIGKILL) = 0 [pid 5846] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5846] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5846] getdents64(3, 0x55557c89f7f0 /* 2 entries */, 32768) = 48 [pid 5846] getdents64(3, 0x55557c89f7f0 /* 0 entries */, 32768) = 0 [pid 5846] close(3) = 0 [ 429.745525][ T31] INFO: task syz-executor125:5853 blocked for more than 143 seconds. [ 429.753757][ T31] Not tainted 6.15.0-rc7-syzkaller #0 [ 429.759794][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 429.769301][ T31] task:syz-executor125 state:D stack:28616 pid:5853 tgid:5847 ppid:5846 task_flags:0x400040 flags:0x00004006 [ 429.781686][ T31] Call Trace: [ 429.785010][ T31] [ 429.788410][ T31] __schedule+0x168f/0x4c70 [ 429.793012][ T31] ? __pfx_preempt_schedule_notrace+0x10/0x10 [ 429.799626][ T31] ? __lock_acquire+0xaac/0xd20 [ 429.804547][ T31] ? schedule+0x165/0x360 [ 429.809357][ T31] ? __pfx___schedule+0x10/0x10 [ 429.814273][ T31] ? schedule+0x91/0x360 [ 429.818966][ T31] schedule+0x165/0x360 [ 429.823175][ T31] schedule_preempt_disabled+0x13/0x30 [ 429.829105][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 429.834892][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 429.841272][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 429.847769][ T31] ? __lock_acquire+0xaac/0xd20 [ 429.852684][ T31] ? lock_two_directories+0x16b/0x220 [ 429.858478][ T31] ? mnt_get_write_access+0x68/0x2a0 [ 429.863812][ T31] down_write_nested+0x1b5/0x200 [ 429.869219][ T31] ? __pfx_down_write_nested+0x10/0x10 [ 429.874724][ T31] ? mnt_get_write_access+0x223/0x2a0 [ 429.881037][ T31] lock_two_directories+0x16b/0x220 [ 429.886510][ T31] do_renameat2+0x38a/0xc50 [ 429.891075][ T31] ? __pfx_do_renameat2+0x10/0x10 [ 429.896519][ T31] ? getname_flags+0x1e5/0x540 [ 429.901321][ T31] __x64_sys_rename+0x82/0x90 [ 429.906392][ T31] do_syscall_64+0xf6/0x210 [ 429.910932][ T31] ? ret_from_fork_asm+0x1a/0x30 [ 429.916211][ T31] ? clear_bhb_loop+0x60/0xb0 [ 429.920949][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 429.927165][ T31] RIP: 0033:0x7f58ce457489 [ 429.931625][ T31] RSP: 002b:00007f58ce3ea168 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 [ 429.940602][ T31] RAX: ffffffffffffffda RBX: 00007f58ce4de6b8 RCX: 00007f58ce457489 [ 429.948928][ T31] RDX: 0030656c69662f30 RSI: 00002000000001c0 RDI: 0000200000000000 [ 429.957202][ T31] RBP: 00007f58ce4de6b0 R08: 00007ffff522f7d7 R09: 0000000000000000 [ 429.965214][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f58ce4de6bc [ 429.973723][ T31] R13: 000000000000006e R14: 00007ffff522f6f0 R15: 00007ffff522f7d8 [ 429.982063][ T31] [ 429.985144][ T31] [ 429.985144][ T31] Showing all locks held in the system: [ 429.993980][ T31] 1 lock held by khungtaskd/31: [ 429.999202][ T31] #0: ffffffff8df3dee0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 430.009497][ T31] 2 locks held by getty/5581: [ 430.014205][ T31] #0: ffff88814cb7c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 430.024471][ T31] #1: ffffc900030062f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 430.034922][ T31] 3 locks held by syz-executor125/5849: [ 430.040786][ T31] 4 locks held by syz-executor125/5853: [ 430.046588][ T31] #0: ffff8880353d6420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 430.056128][ T31] #1: ffff8880353d6730 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x37f/0xc50 [ 430.066582][ T31] #2: ffff88807b085d60 (&type->i_mutex_dir_key#3/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 [ 430.078004][ T31] #3: ffff88807b329808 (&type->i_mutex_dir_key#3/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 [ 430.089434][ T31] [ 430.091784][ T31] ============================================= [ 430.091784][ T31] [ 430.101231][ T31] NMI backtrace for cpu 0 [ 430.101256][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) [ 430.101279][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.101291][ T31] Call Trace: [ 430.101299][ T31] [ 430.101307][ T31] dump_stack_lvl+0x189/0x250 [ 430.101337][ T31] ? __wake_up_klogd+0xd9/0x110 [ 430.101361][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.101388][ T31] ? __pfx__printk+0x10/0x10 [ 430.101432][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 430.101457][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 430.101475][ T31] ? _printk+0xcf/0x120 [ 430.101510][ T31] ? __pfx__printk+0x10/0x10 [ 430.101543][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 430.101565][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 430.101589][ T31] watchdog+0xfee/0x1030 [ 430.101616][ T31] ? watchdog+0x1de/0x1030 [ 430.101648][ T31] kthread+0x711/0x8a0 [ 430.101675][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.101697][ T31] ? __pfx_kthread+0x10/0x10 [ 430.101721][ T31] ? __pfx_kthread+0x10/0x10 [ 430.101742][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.101764][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.101789][ T31] ? __pfx_kthread+0x10/0x10 [ 430.101816][ T31] ret_from_fork+0x4b/0x80 [ 430.101834][ T31] ? __pfx_kthread+0x10/0x10 [ 430.101856][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.101902][ T31] [ 430.101910][ T31] Sending NMI from CPU 0 to CPUs 1: [ 430.247078][ C1] NMI backtrace for cpu 1 [ 430.247095][ C1] CPU: 1 UID: 0 PID: 5849 Comm: syz-executor125 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) [ 430.247114][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.247125][ C1] RIP: 0010:__sanitizer_cov_trace_const_cmp8+0x8/0x90 [ 430.247151][ C1] Code: 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 8b 04 24 <65> 48 8b 0c 25 08 a0 72 92 65 8b 15 58 aa b2 10 81 e2 00 01 ff 00 [ 430.247165][ C1] RSP: 0018:ffffc900044d6ef8 EFLAGS: 00000246 [ 430.247180][ C1] RAX: ffffffff826f434a RBX: 1ffff9200089adf8 RCX: ffffffff826f431d [ 430.247193][ C1] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 430.247203][ C1] RBP: ffffc900044d7090 R08: ffff8880778b39ff R09: 1ffff1100ef1673f [ 430.247215][ C1] R10: dffffc0000000000 R11: ffffed100ef16740 R12: 000000000000000e [ 430.247226][ C1] R13: 1ffff1100ef1673f R14: 000000000000601b R15: ffff8880778b39f8 [ 430.247238][ C1] FS: 00007f58ce40b6c0(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000 [ 430.247253][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 430.247264][ C1] CR2: 000055d3b19b24b0 CR3: 0000000034b24000 CR4: 00000000003526f0 [ 430.247279][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 430.247288][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 430.247298][ C1] Call Trace: [ 430.247306][ C1] [ 430.247312][ C1] __ext4_get_inode_loc+0x5aa/0x1040 [ 430.247347][ C1] ? __pfx___ext4_get_inode_loc+0x10/0x10 [ 430.247372][ C1] ? __pfx___might_resched+0x10/0x10 [ 430.247402][ C1] ext4_reserve_inode_write+0x191/0x330 [ 430.247429][ C1] __ext4_mark_inode_dirty+0x15b/0x700 [ 430.247453][ C1] ext4_dirty_inode+0xd0/0x110 [ 430.247476][ C1] ? __pfx_ext4_dirty_inode+0x10/0x10 [ 430.247498][ C1] __mark_inode_dirty+0x2d1/0xdf0 [ 430.247519][ C1] ext4_xattr_block_set+0x12ca/0x2ac0 [ 430.247564][ C1] ? __pfx_ext4_xattr_block_set+0x10/0x10 [ 430.247584][ C1] ? ext4_xattr_ibody_set+0x100/0x6a0 [ 430.247609][ C1] ext4_xattr_set_handle+0xdfb/0x1590 [ 430.247638][ C1] ? __pfx_ext4_xattr_set_handle+0x10/0x10 [ 430.247663][ C1] ? smack_inode_init_security+0x631/0x760 [ 430.247691][ C1] ext4_initxattrs+0x9f/0x110 [ 430.247710][ C1] security_inode_init_security+0x2a0/0x3f0 [ 430.247737][ C1] ? __pfx_ext4_initxattrs+0x10/0x10 [ 430.247754][ C1] ? __pfx_security_inode_init_security+0x10/0x10 [ 430.247781][ C1] ? _raw_spin_unlock+0x28/0x50 [ 430.247799][ C1] ? insert_inode_locked+0x39a/0x410 [ 430.247819][ C1] __ext4_new_inode+0x3257/0x3bd0 [ 430.247854][ C1] ? __pfx___ext4_new_inode+0x10/0x10 [ 430.247878][ C1] ? __pfx___dquot_initialize+0x10/0x10 [ 430.247893][ C1] ? d_splice_alias+0x111/0x330 [ 430.247914][ C1] ? ext4_lookup+0x2b9/0x6c0 [ 430.247931][ C1] ext4_create+0x22d/0x460 [ 430.247954][ C1] ? __pfx_ext4_create+0x10/0x10 [ 430.247973][ C1] ? bpf_lsm_inode_create+0x9/0x20 [ 430.247990][ C1] ? __pfx_ext4_create+0x10/0x10 [ 430.248006][ C1] path_openat+0x14f1/0x3830 [ 430.248025][ C1] ? arch_stack_walk+0xfc/0x150 [ 430.248063][ C1] ? __pfx_path_openat+0x10/0x10 [ 430.248081][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.248108][ C1] do_filp_open+0x1fa/0x410 [ 430.248130][ C1] ? __pfx_do_filp_open+0x10/0x10 [ 430.248162][ C1] ? _raw_spin_unlock+0x28/0x50 [ 430.248178][ C1] ? alloc_fd+0x64c/0x6c0 [ 430.248208][ C1] do_sys_openat2+0x121/0x1c0 [ 430.248228][ C1] ? __pfx_do_sys_openat2+0x10/0x10 [ 430.248249][ C1] ? rcu_is_watching+0x15/0xb0 [ 430.248277][ C1] __x64_sys_openat+0x138/0x170 [ 430.248298][ C1] do_syscall_64+0xf6/0x210 [ 430.248322][ C1] ? clear_bhb_loop+0x60/0xb0 [ 430.248340][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 430.248356][ C1] RIP: 0033:0x7f58ce457489 [ 430.248371][ 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 [ 430.248384][ C1] RSP: 002b:00007f58ce40b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 430.248401][ C1] RAX: ffffffffffffffda RBX: 00007f58ce4de6a8 RCX: 00007f58ce457489 [ 430.248413][ C1] RDX: 0000000000101042 RSI: 0000200000000140 RDI: 00000000ffffff9c [ 430.248424][ C1] RBP: 00007f58ce4de6a0 R08: 00007f58ce40b6c0 R09: 0000000000000000 [ 430.248434][ C1] R10: 0000000000000001 R11: 0000000000000246 R12: 00007f58ce4de6ac [ 430.248445][ C1] R13: 0000000000000006 R14: 00007ffff522f6f0 R15: 00007ffff522f7d8 [ 430.248464][ C1] [ 430.248472][ C1] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.394 msecs [ 430.249353][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 430.710382][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) [ 430.720456][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 430.730517][ T31] Call Trace: [ 430.733803][ T31] [ 430.736745][ T31] dump_stack_lvl+0x99/0x250 [ 430.741351][ T31] ? __asan_memcpy+0x40/0x70 [ 430.745950][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 430.751158][ T31] ? __pfx__printk+0x10/0x10 [ 430.755779][ T31] panic+0x2db/0x790 [ 430.759687][ T31] ? __pfx_panic+0x10/0x10 [ 430.764116][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 430.769931][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 430.775310][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 430.781481][ T31] watchdog+0x102d/0x1030 [ 430.785825][ T31] ? watchdog+0x1de/0x1030 [ 430.790345][ T31] kthread+0x711/0x8a0 [ 430.794439][ T31] ? __pfx_watchdog+0x10/0x10 [ 430.799140][ T31] ? __pfx_kthread+0x10/0x10 [ 430.803749][ T31] ? __pfx_kthread+0x10/0x10 [ 430.808383][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 430.813599][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 430.818920][ T31] ? __pfx_kthread+0x10/0x10 [ 430.823524][ T31] ret_from_fork+0x4b/0x80 [ 430.827949][ T31] ? __pfx_kthread+0x10/0x10 [ 430.832573][ T31] ret_from_fork_asm+0x1a/0x30 [ 430.837362][ T31] [ 430.840657][ T31] Kernel Offset: disabled [ 430.844990][ T31] Rebooting in 86400 seconds..