./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2211305917 <...> Warning: Permanently added '10.128.1.139' (ED25519) to the list of known hosts. execve("./syz-executor2211305917", ["./syz-executor2211305917"], 0x7ffcaf16f450 /* 10 vars */) = 0 brk(NULL) = 0x5555838b1000 brk(0x5555838b1d40) = 0x5555838b1d40 arch_prctl(ARCH_SET_FS, 0x5555838b13c0) = 0 set_tid_address(0x5555838b1690) = 5840 set_robust_list(0x5555838b16a0, 24) = 0 rseq(0x5555838b1ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2211305917", 4096) = 28 getrandom("\xb3\xeb\x6a\x86\x9e\xc5\x3b\x40", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555838b1d40 brk(0x5555838d2d40) = 0x5555838d2d40 brk(0x5555838d3000) = 0x5555838d3000 mprotect(0x7f3881929000, 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 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 5841 attached [pid 5841] set_robust_list(0x5555838b16a0, 24 [pid 5840] <... clone resumed>, child_tidptr=0x5555838b1690) = 5841 [pid 5841] <... set_robust_list resumed>) = 0 [pid 5841] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5841] setpgid(0, 0) = 0 [pid 5841] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5841] write(3, "1000", 4) = 4 [pid 5841] close(3) = 0 executing program [pid 5841] write(1, "executing program\n", 18) = 18 [pid 5841] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5841] rt_sigaction(SIGRT_1, {sa_handler=0x7f38818cd470, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f38818beb20}, NULL, 8) = 0 [pid 5841] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5841] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f388183c000 [pid 5841] mprotect(0x7f388183d000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5841] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5841] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f388185c990, parent_tid=0x7f388185c990, exit_signal=0, stack=0x7f388183c000, stack_size=0x20300, tls=0x7f388185c6c0}./strace-static-x86_64: Process 5844 attached => {parent_tid=[5844]}, 88) = 5844 [pid 5844] rseq(0x7f388185cfe0, 0x20, 0, 0x53053053 [pid 5841] rt_sigprocmask(SIG_SETMASK, [], [pid 5844] <... rseq resumed>) = 0 [pid 5841] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5844] set_robust_list(0x7f388185c9a0, 24 [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] <... set_robust_list resumed>) = 0 [pid 5841] <... futex resumed>) = 0 [pid 5844] rt_sigprocmask(SIG_SETMASK, [], [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=4, tv_nsec=50000000} [pid 5844] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5844] memfd_create("syzkaller", 0) = 3 [pid 5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f3879400000 [pid 5844] 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"..., 1048576) = 1048576 [pid 5844] munmap(0x7f3879400000, 138412032) = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [ 92.114885][ T9] cfg80211: failed to load regulatory.db [pid 5844] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5844] close(3) = 0 [pid 5844] close(4) = 0 [pid 5844] mkdir("./file2", 0777) = 0 [ 92.169975][ T5844] loop0: detected capacity change from 0 to 2048 [ 92.206929][ T5844] NILFS (loop0): broken superblock, retrying with spare superblock (blocksize = 1024) [pid 5844] mount("/dev/loop0", "./file2", "nilfs2", MS_SYNCHRONOUS, "") = 0 [pid 5844] openat(AT_FDCWD, "./file2", O_RDONLY|O_DIRECTORY) = 3 [pid 5844] chdir("./file2") = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5844] futex(0x7f388192f608, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] <... futex resumed>) = 0 [pid 5844] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT|O_SYNC|O_DIRECT, 000 [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5844] <... openat resumed>) = 4 [ 92.230541][ T5845] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds [ 92.232888][ T5842] udevd[5842]: incorrect nilfs2 checksum on /dev/loop0 [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5844] futex(0x7f388192f608, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] <... futex resumed>) = 0 [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5844] <... futex resumed>) = 0 [pid 5844] mmap(0x200000001000, 4096, PROT_WRITE, MAP_SHARED|MAP_FIXED, 4, 0) = 0x200000001000 [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5844] futex(0x7f388192f608, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] <... futex resumed>) = 0 [pid 5844] read(4, [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5844] <... read resumed>0x200000001400, 4096) = 10 [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5844] futex(0x7f388192f608, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] <... futex resumed>) = 0 [pid 5844] ftruncate(4, 4096 [ 92.273837][ T30] audit: type=1800 audit(1752522960.673:2): pid=5844 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="syz-executor221" name="file1" dev="loop0" ino=15 res=0 errno=0 [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5844] <... ftruncate resumed>) = -1 EROFS (Read-only file system) [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5841] <... futex resumed>) = 0 [pid 5844] <... futex resumed>) = 1 [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] readv(4, [pid 5841] <... futex resumed>) = 0 [pid 5844] <... readv resumed>[{iov_base=0x2000000002c0, iov_len=236}], 1) = -1 EROFS (Read-only file system) [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5844] futex(0x7f388192f608, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] <... futex resumed>) = 0 [pid 5844] openat(AT_FDCWD, "/proc/diskstats", O_RDONLY [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5844] <... openat resumed>) = 5 [pid 5844] futex(0x7f388192f60c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5841] <... futex resumed>) = 0 [pid 5844] futex(0x7f388192f608, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5841] futex(0x7f388192f608, FUTEX_WAKE_PRIVATE, 1000000 [pid 5844] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5841] <... futex resumed>) = 0 [pid 5844] read(5, [ 92.328209][ T5844] NILFS (loop0): DAT doesn't have a block to manage vblocknr = 3044605952 [ 92.336989][ T5844] NILFS error (device loop0): nilfs_bmap_truncate: broken bmap (inode number=15) [ 92.347999][ T5844] Remounting filesystem read-only [ 92.353153][ T5844] NILFS (loop0): error -5 truncating bmap (ino=15) [pid 5841] futex(0x7f388192f60c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5841] futex(0x7f388192f61c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5841] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f388181b000 [pid 5841] mprotect(0x7f388181c000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5841] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5841] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f388183b990, parent_tid=0x7f388183b990, exit_signal=0, stack=0x7f388181b000, stack_size=0x20300, tls=0x7f388183b6c0}./strace-static-x86_64: Process 5846 attached => {parent_tid=[5846]}, 88) = 5846 [pid 5841] rt_sigprocmask(SIG_SETMASK, [], [pid 5846] rseq(0x7f388183bfe0, 0x20, 0, 0x53053053 [pid 5841] <... rt_sigprocmask resumed>NULL, 8) = 0 [pid 5846] <... rseq resumed>) = 0 [pid 5841] futex(0x7f388192f618, FUTEX_WAKE_PRIVATE, 1000000 [pid 5846] set_robust_list(0x7f388183b9a0, 24) = 0 [pid 5841] <... futex resumed>) = 0 [pid 5846] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5841] futex(0x7f388192f61c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5846] read(5, [pid 5841] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5841] exit_group(0) = ? [pid 5840] kill(-5841, SIGKILL) = 0 [pid 5840] kill(5841, SIGKILL) = 0 [pid 5840] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5840] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5840] getdents64(3, 0x5555838b2730 /* 2 entries */, 32768) = 48 [pid 5840] getdents64(3, 0x5555838b2730 /* 0 entries */, 32768) = 0 [pid 5840] close(3) = 0 [ 286.674388][ T31] INFO: task syz-executor221:5846 blocked for more than 143 seconds. [ 286.682716][ T31] Not tainted 6.16.0-rc6-syzkaller #0 [ 286.688939][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.698986][ T31] task:syz-executor221 state:D stack:29728 pid:5846 tgid:5841 ppid:5840 task_flags:0x400040 flags:0x00004006 [ 286.711248][ T31] Call Trace: [ 286.714799][ T31] [ 286.717955][ T31] __schedule+0x16a2/0x4cb0 [ 286.723184][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.728165][ T31] ? schedule+0x165/0x360 [ 286.733252][ T31] ? __pfx___schedule+0x10/0x10 [ 286.738352][ T31] ? schedule+0x91/0x360 [ 286.743031][ T31] schedule+0x165/0x360 [ 286.747411][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.753382][ T31] __mutex_lock+0x724/0xe80 [ 286.757924][ T31] ? __mutex_lock+0x51b/0xe80 [ 286.763257][ T31] ? fdget_pos+0x247/0x320 [ 286.768008][ T31] ? __pfx___mutex_lock+0x10/0x10 [ 286.773732][ T31] ? __fget_files+0x2a/0x420 [ 286.778378][ T31] ? __fget_files+0x3a0/0x420 [ 286.783537][ T31] ? __fget_files+0x2a/0x420 [ 286.788260][ T31] fdget_pos+0x247/0x320 [ 286.793031][ T31] ksys_read+0x79/0x250 [ 286.797435][ T31] ? __pfx_ksys_read+0x10/0x10 [ 286.803568][ T31] ? rcu_is_watching+0x15/0xb0 [ 286.808607][ T31] do_syscall_64+0xfa/0x3b0 [ 286.813667][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.820072][ T31] ? __switch_to_asm+0x39/0x70 [ 286.825339][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.830221][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.836621][ T31] RIP: 0033:0x7f38818a7589 [ 286.841090][ T31] RSP: 002b:00007f388183b218 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 286.850137][ T31] RAX: ffffffffffffffda RBX: 00007f388192f618 RCX: 00007f38818a7589 [ 286.858595][ T31] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 286.867251][ T31] RBP: 00007f388192f610 R08: 00007ffeb1c29c07 R09: 0000000000000000 [ 286.875759][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f38818fbb1c [ 286.884176][ T31] R13: 0000200000000180 R14: 0000200000002200 R15: 00002000000002c0 [ 286.892829][ T31] [ 286.895888][ T31] [ 286.895888][ T31] Showing all locks held in the system: [ 286.904295][ T31] 1 lock held by khungtaskd/31: [ 286.909352][ T31] #0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 286.920268][ T31] 2 locks held by kworker/u8:2/36: [ 286.925942][ T31] #0: ffff8880b8639e18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 [ 286.936411][ T31] #1: ffff8880b8623f08 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39e/0x6d0 [ 286.948441][ T31] 2 locks held by getty/5596: [ 286.953544][ T31] #0: ffff888030e250a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 286.963613][ T31] #1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 286.974123][ T31] 4 locks held by syz-executor221/5844: [ 286.979783][ T31] 1 lock held by syz-executor221/5846: [ 286.985642][ T31] #0: ffff888029352478 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x247/0x320 [ 286.995208][ T31] [ 286.997590][ T31] ============================================= [ 286.997590][ T31] [ 287.006536][ T31] NMI backtrace for cpu 0 [ 287.006551][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller #0 PREEMPT(full) [ 287.006572][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.006582][ T31] Call Trace: [ 287.006590][ T31] [ 287.006598][ T31] dump_stack_lvl+0x189/0x250 [ 287.006621][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.006649][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.006670][ T31] ? __pfx__printk+0x10/0x10 [ 287.006707][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.006735][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.006756][ T31] ? _printk+0xcf/0x120 [ 287.006784][ T31] ? __pfx__printk+0x10/0x10 [ 287.006810][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.006841][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.006867][ T31] watchdog+0xfee/0x1030 [ 287.006897][ T31] ? watchdog+0x1de/0x1030 [ 287.006931][ T31] kthread+0x711/0x8a0 [ 287.006960][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.006985][ T31] ? __pfx_kthread+0x10/0x10 [ 287.007011][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.007036][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.007061][ T31] ? __pfx_kthread+0x10/0x10 [ 287.007085][ T31] ret_from_fork+0x3fc/0x770 [ 287.007118][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.007143][ T31] ? __switch_to_asm+0x39/0x70 [ 287.007164][ T31] ? __switch_to_asm+0x33/0x70 [ 287.007184][ T31] ? __pfx_kthread+0x10/0x10 [ 287.007209][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.007248][ T31] [ 287.007255][ T31] Sending NMI from CPU 0 to CPUs 1: [ 287.165358][ C1] NMI backtrace for cpu 1 [ 287.165375][ C1] CPU: 1 UID: 0 PID: 5844 Comm: syz-executor221 Not tainted 6.16.0-rc6-syzkaller #0 PREEMPT(full) [ 287.165393][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.165402][ C1] RIP: 0010:lockdep_hardirqs_on_prepare+0x1a8/0x2a0 [ 287.165430][ C1] Code: ba 07 00 00 00 83 da 00 48 89 df 4c 89 f6 e8 bf 45 00 00 85 c0 75 bd eb 11 48 c7 c7 10 00 01 8e 4c 89 fe e8 ea 08 52 03 eb c3 <48> c7 c7 0a 21 b7 8d e8 bc 2e ca 09 b8 ff ff ff ff 65 0f c1 05 9f [ 287.165443][ C1] RSP: 0018:ffffc900040ff838 EFLAGS: 00000046 [ 287.165458][ C1] RAX: 0000000000000002 RBX: ffff888032efda00 RCX: ffffffff934a1918 [ 287.165468][ C1] RDX: 0000000000000006 RSI: ffff888032efe518 RDI: ffff888032efda00 [ 287.165478][ C1] RBP: dffffc0000000000 R08: ffffffff8fa0cbf7 R09: 1ffffffff1f4197e [ 287.165489][ C1] R10: dffffc0000000000 R11: fffffbfff1f4197f R12: ffff888032efe540 [ 287.165499][ C1] R13: 0000200000001000 R14: ffff888032efe540 R15: 0000000000000002 [ 287.165510][ C1] FS: 00007f388185c6c0(0000) GS:ffff888125d4f000(0000) knlGS:0000000000000000 [ 287.165523][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 287.165533][ C1] CR2: 0000200000001000 CR3: 0000000076be0000 CR4: 00000000003526f0 [ 287.165549][ C1] Call Trace: [ 287.165558][ C1] [ 287.165567][ C1] trace_hardirqs_on+0x28/0x40 [ 287.165587][ C1] do_user_addr_fault+0x1a8/0x1390 [ 287.165611][ C1] ? rcu_is_watching+0x15/0xb0 [ 287.165627][ C1] ? trace_page_fault_kernel+0x84/0x1e0 [ 287.165648][ C1] exc_page_fault+0x76/0xf0 [ 287.165670][ C1] asm_exc_page_fault+0x26/0x30 [ 287.165684][ C1] RIP: 0010:rep_movs_alternative+0x4a/0x90 [ 287.165701][ C1] Code: cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 06 48 89 07 48 83 c6 08 48 83 c7 08 83 e9 08 74 db 83 f9 08 73 e8 eb c5 a4 c3 cc cc cc cc 48 8b 06 48 89 07 48 8d 47 08 48 83 e0 f8 48 [ 287.165712][ C1] RSP: 0018:ffffc900040ffa18 EFLAGS: 00050202 [ 287.165725][ C1] RAX: ffffffff84b84b01 RBX: ffff888078730000 RCX: 000000000000000a [ 287.165735][ C1] RDX: 0000000000000000 RSI: ffff888078730e80 RDI: 0000200000001000 [ 287.165745][ C1] RBP: ffffc900040ffb78 R08: ffff888078730e89 R09: 1ffff1100f0e61d1 [ 287.165755][ C1] R10: dffffc0000000000 R11: ffffed100f0e61d2 R12: 1ffff9200081ffaf [ 287.165766][ C1] R13: 0000200000000180 R14: ffffc900040ffd88 R15: 0000000000000e8a [ 287.165779][ C1] ? _copy_to_iter+0x151/0x16f0 [ 287.165797][ C1] _copy_to_iter+0x24c/0x16f0 [ 287.165815][ C1] ? kasan_quarantine_put+0xdd/0x220 [ 287.165833][ C1] ? __pfx__copy_to_iter+0x10/0x10 [ 287.165848][ C1] ? disk_seqf_stop+0x57/0x90 [ 287.165865][ C1] ? kfree+0x18e/0x440 [ 287.165882][ C1] ? klist_iter_exit+0xc1/0x100 [ 287.165898][ C1] seq_read_iter+0xbeb/0xe10 [ 287.165923][ C1] proc_reg_read_iter+0x1b4/0x280 [ 287.165941][ C1] vfs_read+0x4d0/0x980 [ 287.165962][ C1] ? __pfx_vfs_read+0x10/0x10 [ 287.165983][ C1] ? __fget_files+0x2a/0x420 [ 287.166000][ C1] ksys_read+0x145/0x250 [ 287.166019][ C1] ? __pfx_ksys_read+0x10/0x10 [ 287.166035][ C1] ? rcu_is_watching+0x15/0xb0 [ 287.166065][ C1] do_syscall_64+0xfa/0x3b0 [ 287.166078][ C1] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.166098][ C1] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.166112][ C1] ? clear_bhb_loop+0x60/0xb0 [ 287.166128][ C1] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.166142][ C1] RIP: 0033:0x7f38818a7589 [ 287.166155][ 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 [ 287.166166][ C1] RSP: 002b:00007f388185c218 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 287.166180][ C1] RAX: ffffffffffffffda RBX: 00007f388192f608 RCX: 00007f38818a7589 [ 287.166190][ C1] RDX: 0000000000002024 RSI: 0000200000000180 RDI: 0000000000000005 [ 287.166200][ C1] RBP: 00007f388192f600 R08: 0000000000000000 R09: 0000000000000000 [ 287.166210][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f38818fbb1c [ 287.166219][ C1] R13: 0000200000000180 R14: 0000200000002200 R15: 00002000000002c0 [ 287.166235][ C1] [ 287.166389][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 287.578856][ T31] CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller #0 PREEMPT(full) [ 287.589109][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.599536][ T31] Call Trace: [ 287.602839][ T31] [ 287.605787][ T31] dump_stack_lvl+0x99/0x250 [ 287.610691][ T31] ? __asan_memcpy+0x40/0x70 [ 287.615296][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.620603][ T31] ? __pfx__printk+0x10/0x10 [ 287.625218][ T31] panic+0x2db/0x790 [ 287.629128][ T31] ? __pfx_panic+0x10/0x10 [ 287.633663][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 287.639498][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 287.645187][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 287.651564][ T31] watchdog+0x102d/0x1030 [ 287.655913][ T31] ? watchdog+0x1de/0x1030 [ 287.660352][ T31] kthread+0x711/0x8a0 [ 287.664439][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.669178][ T31] ? __pfx_kthread+0x10/0x10 [ 287.674704][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.680298][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.686261][ T31] ? __pfx_kthread+0x10/0x10 [ 287.691050][ T31] ret_from_fork+0x3fc/0x770 [ 287.695830][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.701150][ T31] ? __switch_to_asm+0x39/0x70 [ 287.706064][ T31] ? __switch_to_asm+0x33/0x70 [ 287.710858][ T31] ? __pfx_kthread+0x10/0x10 [ 287.715470][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.720258][ T31] [ 287.723828][ T31] Kernel Offset: disabled [ 287.728152][ T31] Rebooting in 86400 seconds..