./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor251832650 <...> Warning: Permanently added '10.128.0.79' (ED25519) to the list of known hosts. execve("./syz-executor251832650", ["./syz-executor251832650"], 0x7ffe5743edb0 /* 10 vars */) = 0 brk(NULL) = 0x55555606b000 brk(0x55555606bd00) = 0x55555606bd00 arch_prctl(ARCH_SET_FS, 0x55555606b380) = 0 set_tid_address(0x55555606b650) = 5855 set_robust_list(0x55555606b660, 24) = 0 rseq(0x55555606bca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor251832650", 4096) = 27 getrandom("\x80\x3f\x03\xb6\x69\xf3\xb1\xc9", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555606bd00 brk(0x55555608cd00) = 0x55555608cd00 brk(0x55555608d000) = 0x55555608d000 mprotect(0x7fc04ca43000, 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 5856 attached [pid 5856] set_robust_list(0x55555606b660, 24 [pid 5855] <... clone resumed>, child_tidptr=0x55555606b650) = 5856 [pid 5856] <... set_robust_list resumed>) = 0 [pid 5855] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5856] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached [pid 5855] <... clone resumed>, child_tidptr=0x55555606b650) = 5857 [pid 5855] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5858 attached [pid 5857] set_robust_list(0x55555606b660, 24 [pid 5858] set_robust_list(0x55555606b660, 24 [pid 5857] <... set_robust_list resumed>) = 0 [pid 5858] <... set_robust_list resumed>) = 0 [pid 5857] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5856] <... clone resumed>, child_tidptr=0x55555606b650) = 5858 ./strace-static-x86_64: Process 5860 attached ./strace-static-x86_64: Process 5859 attached [pid 5858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5857] <... clone resumed>, child_tidptr=0x55555606b650) = 5860 [pid 5855] <... clone resumed>, child_tidptr=0x55555606b650) = 5859 [pid 5859] set_robust_list(0x55555606b660, 24 [pid 5858] setpgid(0, 0 [pid 5855] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5860] set_robust_list(0x55555606b660, 24 [pid 5859] <... set_robust_list resumed>) = 0 [pid 5858] <... setpgid resumed>) = 0 [pid 5860] <... set_robust_list resumed>) = 0 [pid 5859] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL./strace-static-x86_64: Process 5862 attached ./strace-static-x86_64: Process 5861 attached [pid 5855] <... clone resumed>, child_tidptr=0x55555606b650) = 5861 [pid 5860] <... prctl resumed>) = 0 [pid 5855] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5862] set_robust_list(0x55555606b660, 24 [pid 5861] set_robust_list(0x55555606b660, 24 [pid 5859] <... clone resumed>, child_tidptr=0x55555606b650) = 5862 [pid 5860] setpgid(0, 0 [pid 5858] <... openat resumed>) = 3 [pid 5860] <... setpgid resumed>) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5858] write(3, "1000", 4./strace-static-x86_64: Process 5863 attached [pid 5862] <... set_robust_list resumed>) = 0 [pid 5860] write(3, "1000", 4 [pid 5858] <... write resumed>) = 4 [pid 5862] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5861] <... set_robust_list resumed>) = 0 [pid 5860] <... write resumed>) = 4 [pid 5863] set_robust_list(0x55555606b660, 24) = 0 [pid 5862] <... prctl resumed>) = 0 [pid 5855] <... clone resumed>, child_tidptr=0x55555606b650) = 5863 [pid 5861] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5860] close(3 [pid 5858] close(3 [pid 5862] setpgid(0, 0 [pid 5860] <... close resumed>) = 0 [pid 5858] <... close resumed>) = 0 executing program [pid 5862] <... setpgid resumed>) = 0 [pid 5860] write(1, "executing program\n", 18executing program [pid 5858] write(1, "executing program\n", 18 [pid 5860] <... write resumed>) = 18 ./strace-static-x86_64: Process 5864 attached [pid 5863] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD [pid 5862] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5861] <... clone resumed>, child_tidptr=0x55555606b650) = 5864 [pid 5864] set_robust_list(0x55555606b660, 24 [pid 5862] <... openat resumed>) = 3 [pid 5860] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_TRUNC|O_APPEND|O_NONBLOCK|__O_SYNC|O_NOFOLLOW|O_NOATIME|FASYNC [pid 5858] <... write resumed>) = 18 [pid 5864] <... set_robust_list resumed>) = 0 [pid 5862] write(3, "1000", 4 [pid 5860] <... openat resumed>) = 3 [pid 5858] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_TRUNC|O_APPEND|O_NONBLOCK|__O_SYNC|O_NOFOLLOW|O_NOATIME|FASYNC./strace-static-x86_64: Process 5865 attached [pid 5864] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5862] <... write resumed>) = 4 [pid 5860] dup(3 [pid 5858] <... openat resumed>) = 3 [pid 5864] <... prctl resumed>) = 0 [pid 5862] close(3 [pid 5860] <... dup resumed>) = 4 [pid 5858] dup(3 [pid 5865] set_robust_list(0x55555606b660, 24 [pid 5864] setpgid(0, 0 [pid 5863] <... clone resumed>, child_tidptr=0x55555606b650) = 5865 [pid 5862] <... close resumed>) = 0 [pid 5865] <... set_robust_list resumed>) = 0 [pid 5860] fallocate(4, FALLOC_FL_ZERO_RANGE, 0, 137438954496 [pid 5864] <... setpgid resumed>) = 0 [pid 5858] <... dup resumed>) = 4 [pid 5864] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC [pid 5858] fallocate(4, FALLOC_FL_ZERO_RANGE, 0, 137438954496executing program executing program [pid 5864] <... openat resumed>) = 3 [pid 5862] write(1, "executing program\n", 18 [pid 5864] write(3, "1000", 4 [pid 5862] <... write resumed>) = 18 [pid 5864] <... write resumed>) = 4 [pid 5864] close(3) = 0 [pid 5862] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_TRUNC|O_APPEND|O_NONBLOCK|__O_SYNC|O_NOFOLLOW|O_NOATIME|FASYNC [pid 5864] write(1, "executing program\n", 18) = 18 [pid 5865] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5864] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_TRUNC|O_APPEND|O_NONBLOCK|__O_SYNC|O_NOFOLLOW|O_NOATIME|FASYNC [pid 5862] <... openat resumed>) = 3 [pid 5864] <... openat resumed>) = 3 [pid 5864] dup(3) = 4 [pid 5864] fallocate(4, FALLOC_FL_ZERO_RANGE, 0, 137438954496 [pid 5865] <... prctl resumed>) = 0 [pid 5862] dup(3 [pid 5865] setpgid(0, 0 [pid 5862] <... dup resumed>) = 4 [pid 5862] fallocate(4, FALLOC_FL_ZERO_RANGE, 0, 137438954496 [pid 5865] <... setpgid resumed>) = 0 [pid 5865] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5865] write(3, "1000", 4) = 4 [pid 5865] close(3) = 0 [pid 5865] write(1, "executing program\n", 18executing program ) = 18 [pid 5865] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_TRUNC|O_APPEND|O_NONBLOCK|__O_SYNC|O_NOFOLLOW|O_NOATIME|FASYNC) = 3 [pid 5865] dup(3) = 4 [pid 5865] fallocate(4, FALLOC_FL_ZERO_RANGE, 0, 137438954496 [pid 5856] kill(-5858, SIGKILL) = 0 [pid 5856] kill(5858, SIGKILL [pid 5857] kill(-5860, SIGKILL [pid 5856] <... kill resumed>) = 0 [pid 5857] <... kill resumed>) = 0 [pid 5857] kill(5860, SIGKILL) = 0 [pid 5861] kill(-5864, SIGKILL [pid 5859] kill(-5862, SIGKILL [pid 5861] <... kill resumed>) = 0 [pid 5859] <... kill resumed>) = 0 [pid 5859] kill(5862, SIGKILL [pid 5861] kill(5864, SIGKILL [pid 5859] <... kill resumed>) = 0 [pid 5861] <... kill resumed>) = 0 [pid 5863] kill(-5865, SIGKILL) = 0 [pid 5863] kill(5865, SIGKILL) = 0 [pid 5857] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5856] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5861] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5857] <... openat resumed>) = 3 [pid 5856] <... openat resumed>) = 3 [pid 5856] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5861] newfstatat(3, "", [pid 5857] newfstatat(3, "", [pid 5861] <... newfstatat resumed>{st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5863] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5861] getdents64(3, [pid 5859] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY [pid 5857] <... newfstatat resumed>{st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5863] <... openat resumed>) = 3 [pid 5861] <... getdents64 resumed>0x55555606c6f0 /* 2 entries */, 32768) = 48 [pid 5859] <... openat resumed>) = 3 [pid 5857] getdents64(3, [pid 5856] getdents64(3, [pid 5863] newfstatat(3, "", [pid 5861] getdents64(3, [pid 5859] newfstatat(3, "", [pid 5857] <... getdents64 resumed>0x55555606c6f0 /* 2 entries */, 32768) = 48 [pid 5863] <... newfstatat resumed>{st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5861] <... getdents64 resumed>0x55555606c6f0 /* 0 entries */, 32768) = 0 [pid 5859] <... newfstatat resumed>{st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5857] getdents64(3, [pid 5863] getdents64(3, [pid 5861] close(3 [pid 5859] getdents64(3, [pid 5857] <... getdents64 resumed>0x55555606c6f0 /* 0 entries */, 32768) = 0 [pid 5863] <... getdents64 resumed>0x55555606c6f0 /* 2 entries */, 32768) = 48 [pid 5861] <... close resumed>) = 0 [pid 5859] <... getdents64 resumed>0x55555606c6f0 /* 2 entries */, 32768) = 48 [pid 5857] close(3 [pid 5863] getdents64(3, [pid 5859] getdents64(3, [pid 5857] <... close resumed>) = 0 [pid 5863] <... getdents64 resumed>0x55555606c6f0 /* 0 entries */, 32768) = 0 [pid 5859] <... getdents64 resumed>0x55555606c6f0 /* 0 entries */, 32768) = 0 [pid 5863] close(3 [pid 5859] close(3 [pid 5863] <... close resumed>) = 0 [pid 5859] <... close resumed>) = 0 [pid 5856] <... getdents64 resumed>0x55555606c6f0 /* 2 entries */, 32768) = 48 [pid 5856] getdents64(3, 0x55555606c6f0 /* 0 entries */, 32768) = 0 [pid 5856] close(3) = 0 [pid 5860] <... fallocate resumed>) = ? [pid 5860] +++ killed by SIGKILL +++ [pid 5857] --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_KILLED, si_pid=5860, si_uid=0, si_status=SIGKILL, si_utime=0, si_stime=10149 /* 101.49 s */} --- [pid 5857] clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5873 attached , child_tidptr=0x55555606b650) = 5873 [pid 5873] set_robust_list(0x55555606b660, 24) = 0 [pid 5873] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5873] setpgid(0, 0) = 0 [pid 5873] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 executing program [pid 5873] write(3, "1000", 4) = 4 [pid 5873] close(3) = 0 [pid 5873] write(1, "executing program\n", 18) = 18 [pid 5873] openat(AT_FDCWD, "/dev/nullb0", O_RDWR|O_TRUNC|O_APPEND|O_NONBLOCK|__O_SYNC|O_NOFOLLOW|O_NOATIME|FASYNC) = 3 [pid 5873] dup(3) = 4 [pid 5873] fallocate(4, FALLOC_FL_ZERO_RANGE, 0, 137438954496 [pid 5857] kill(-5873, SIGKILL) = 0 [pid 5857] kill(5873, SIGKILL) = 0 [pid 5857] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 [pid 5857] newfstatat(3, "", {st_mode=S_IFDIR|0755, st_size=0, ...}, AT_EMPTY_PATH) = 0 [pid 5857] getdents64(3, 0x55555606c6f0 /* 2 entries */, 32768) = 48 [pid 5857] getdents64(3, 0x55555606c6f0 /* 0 entries */, 32768) = 0 [pid 5857] close(3) = 0 [ 286.605978][ T31] INFO: task syz-executor251:5862 blocked for more than 143 seconds. [ 286.614132][ T31] Not tainted 6.16.0-rc2-syzkaller-00308-gf7301f856d35 #0 [ 286.635860][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.644592][ T31] task:syz-executor251 state:D stack:28008 pid:5862 tgid:5862 ppid:5859 task_flags:0x400040 flags:0x00004006 [ 286.675868][ T31] Call Trace: [ 286.679208][ T31] [ 286.682175][ T31] __schedule+0x16f5/0x4d00 [ 286.702529][ T31] ? xfd_validate_state+0x6d/0x150 [ 286.708149][ T31] ? __pfx_preempt_schedule_notrace+0x10/0x10 [ 286.714271][ T31] ? schedule+0x165/0x360 [ 286.735886][ T31] ? __pfx___schedule+0x10/0x10 [ 286.740842][ T31] ? schedule+0x91/0x360 [ 286.745134][ T31] schedule+0x165/0x360 [ 286.765832][ T31] schedule_preempt_disabled+0x13/0x30 [ 286.771372][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 286.781993][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 286.795909][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 286.802138][ T31] ? __lock_acquire+0xab9/0xd20 [ 286.807102][ T31] ? blkdev_fallocate+0x1d8/0x4b0 [ 286.812204][ T31] down_write+0x1ab/0x1f0 [ 286.816860][ T31] ? __pfx_down_write+0x10/0x10 [ 286.821769][ T31] ? end_current_label_crit_section+0x152/0x180 [ 286.828171][ T31] blkdev_fallocate+0x1d8/0x4b0 [ 286.833074][ T31] vfs_fallocate+0x6a0/0x830 [ 286.837894][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 286.843053][ T31] ? __pfx_vfs_fallocate+0x10/0x10 [ 286.848267][ T31] __x64_sys_fallocate+0xc0/0x110 [ 286.853440][ T31] do_syscall_64+0xfa/0x3b0 [ 286.858075][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 286.863320][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.869547][ T31] ? clear_bhb_loop+0x60/0xb0 [ 286.874266][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 286.880266][ T31] RIP: 0033:0x7fc04c9d0b29 [ 286.884824][ T31] RSP: 002b:00007ffe17debc98 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 286.893324][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc04c9d0b29 [ 286.901475][ T31] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004 [ 286.909553][ T31] RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 [ 286.917730][ T31] R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000001 [ 286.925995][ T31] R13: 00007ffe17debeb8 R14: 00007ffe17debcc0 R15: 00007ffe17debcb0 [ 286.934033][ T31] [ 286.937250][ T31] INFO: task syz-executor251:5864 blocked for more than 143 seconds. [ 286.945578][ T31] Not tainted 6.16.0-rc2-syzkaller-00308-gf7301f856d35 #0 [ 286.953375][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 286.962258][ T31] task:syz-executor251 state:D stack:27272 pid:5864 tgid:5864 ppid:5861 task_flags:0x400040 flags:0x00004006 [ 286.985821][ T31] Call Trace: [ 286.989262][ T31] [ 286.992227][ T31] __schedule+0x16f5/0x4d00 [ 287.005983][ T31] ? xfd_validate_state+0x6d/0x150 [ 287.011266][ T31] ? save_fpregs_to_fpstate+0xa3/0x210 [ 287.025825][ T31] ? __lock_acquire+0xab9/0xd20 [ 287.030847][ T31] ? schedule+0x165/0x360 [ 287.035232][ T31] ? __pfx___schedule+0x10/0x10 [ 287.055865][ T31] ? schedule+0x91/0x360 [ 287.060190][ T31] schedule+0x165/0x360 [ 287.064387][ T31] schedule_preempt_disabled+0x13/0x30 [ 287.086279][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 287.092074][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 287.105850][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 287.112080][ T31] ? __lock_acquire+0xab9/0xd20 [ 287.125828][ T31] ? blkdev_fallocate+0x1d8/0x4b0 [ 287.131116][ T31] down_write+0x1ab/0x1f0 [ 287.135498][ T31] ? __pfx_down_write+0x10/0x10 [ 287.140560][ T31] ? end_current_label_crit_section+0x152/0x180 [ 287.146989][ T31] blkdev_fallocate+0x1d8/0x4b0 [ 287.151879][ T31] vfs_fallocate+0x6a0/0x830 [ 287.156553][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 287.161739][ T31] ? __pfx_vfs_fallocate+0x10/0x10 [ 287.167019][ T31] __x64_sys_fallocate+0xc0/0x110 [ 287.172094][ T31] do_syscall_64+0xfa/0x3b0 [ 287.176693][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.181935][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.188552][ T31] ? clear_bhb_loop+0x60/0xb0 [ 287.193285][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.199276][ T31] RIP: 0033:0x7fc04c9d0b29 [ 287.203727][ T31] RSP: 002b:00007ffe17debc98 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 287.212224][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc04c9d0b29 [ 287.220299][ T31] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004 [ 287.228345][ T31] RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 [ 287.236418][ T31] R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000001 [ 287.244436][ T31] R13: 00007ffe17debeb8 R14: 00007ffe17debcc0 R15: 00007ffe17debcb0 [ 287.252611][ T31] [ 287.255689][ T31] INFO: task syz-executor251:5865 blocked for more than 144 seconds. [ 287.274812][ T31] Not tainted 6.16.0-rc2-syzkaller-00308-gf7301f856d35 #0 [ 287.282626][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 287.291440][ T31] task:syz-executor251 state:D stack:25064 pid:5865 tgid:5865 ppid:5863 task_flags:0x400040 flags:0x00004006 [ 287.315882][ T31] Call Trace: [ 287.319233][ T31] [ 287.322195][ T31] __schedule+0x16f5/0x4d00 [ 287.335857][ T31] ? xfd_validate_state+0x6d/0x150 [ 287.341056][ T31] ? __pfx_preempt_schedule_notrace+0x10/0x10 [ 287.365838][ T31] ? schedule+0x165/0x360 [ 287.370275][ T31] ? __pfx___schedule+0x10/0x10 [ 287.375187][ T31] ? schedule+0x91/0x360 [ 287.385831][ T31] schedule+0x165/0x360 [ 287.390141][ T31] schedule_preempt_disabled+0x13/0x30 [ 287.395647][ T31] rwsem_down_write_slowpath+0xbec/0x1030 [ 287.425863][ T31] ? rwsem_down_write_slowpath+0x7ec/0x1030 [ 287.431863][ T31] ? __pfx_rwsem_down_write_slowpath+0x10/0x10 [ 287.445829][ T31] ? __lock_acquire+0xab9/0xd20 [ 287.450789][ T31] ? blkdev_fallocate+0x1d8/0x4b0 [ 287.465842][ T31] down_write+0x1ab/0x1f0 [ 287.470276][ T31] ? __pfx_down_write+0x10/0x10 [ 287.475171][ T31] ? end_current_label_crit_section+0x152/0x180 [ 287.485915][ T31] blkdev_fallocate+0x1d8/0x4b0 [ 287.490947][ T31] vfs_fallocate+0x6a0/0x830 [ 287.499573][ T31] ? __pfx_ptrace_notify+0x10/0x10 [ 287.504757][ T31] ? __pfx_vfs_fallocate+0x10/0x10 [ 287.521323][ T31] __x64_sys_fallocate+0xc0/0x110 [ 287.535885][ T31] do_syscall_64+0xfa/0x3b0 [ 287.540548][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.555827][ T31] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.562070][ T31] ? clear_bhb_loop+0x60/0xb0 [ 287.572813][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 287.585869][ T31] RIP: 0033:0x7fc04c9d0b29 [ 287.590445][ T31] RSP: 002b:00007ffe17debc98 EFLAGS: 00000246 ORIG_RAX: 000000000000011d [ 287.607468][ T31] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc04c9d0b29 [ 287.621955][ T31] RDX: 0000000000000000 RSI: 0000000000000010 RDI: 0000000000000004 [ 287.639627][ T31] RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 [ 287.648081][ T31] R10: 0000002000000400 R11: 0000000000000246 R12: 0000000000000001 [ 287.656214][ T31] R13: 00007ffe17debeb8 R14: 00007ffe17debcc0 R15: 00007ffe17debcb0 [ 287.664249][ T31] [ 287.667468][ T31] [ 287.667468][ T31] Showing all locks held in the system: [ 287.675365][ T31] 1 lock held by khungtaskd/31: [ 287.695929][ T31] #0: ffffffff8e13eda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 [ 287.726078][ T31] 2 locks held by klogd/5188: [ 287.730902][ T31] 2 locks held by getty/5587: [ 287.735613][ T31] #0: ffff8880345da0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 [ 287.759215][ T31] #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 [ 287.796257][ T31] 3 locks held by syz-executor251/5858: [ 287.801880][ T31] 1 lock held by syz-executor251/5862: [ 287.826213][ T31] #0: ffff888022c27aa0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x1d8/0x4b0 [ 287.866465][ T31] 1 lock held by syz-executor251/5864: [ 287.874619][ T31] #0: ffff888022c27aa0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x1d8/0x4b0 [ 287.895965][ T31] 1 lock held by syz-executor251/5865: [ 287.906002][ T31] #0: ffff888022c27aa0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x1d8/0x4b0 [ 287.925996][ T31] 1 lock held by syz-executor251/5873: [ 287.931510][ T31] #0: ffff888022c27aa0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}, at: blkdev_fallocate+0x1d8/0x4b0 [ 287.949728][ T31] [ 287.952112][ T31] ============================================= [ 287.952112][ T31] [ 287.961036][ T31] NMI backtrace for cpu 1 [ 287.961054][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc2-syzkaller-00308-gf7301f856d35 #0 PREEMPT(full) [ 287.961076][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 287.961087][ T31] Call Trace: [ 287.961094][ T31] [ 287.961103][ T31] dump_stack_lvl+0x189/0x250 [ 287.961135][ T31] ? __wake_up_klogd+0xd9/0x110 [ 287.961159][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 287.961188][ T31] ? __pfx__printk+0x10/0x10 [ 287.961221][ T31] nmi_cpu_backtrace+0x39e/0x3d0 [ 287.961249][ T31] ? __pfx_nmi_cpu_backtrace+0x10/0x10 [ 287.961271][ T31] ? _printk+0xcf/0x120 [ 287.961295][ T31] ? __pfx__printk+0x10/0x10 [ 287.961317][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 [ 287.961345][ T31] nmi_trigger_cpumask_backtrace+0x17a/0x300 [ 287.961371][ T31] watchdog+0xfee/0x1030 [ 287.961409][ T31] ? watchdog+0x1de/0x1030 [ 287.961443][ T31] kthread+0x70e/0x8a0 [ 287.961469][ T31] ? __pfx_watchdog+0x10/0x10 [ 287.961491][ T31] ? __pfx_kthread+0x10/0x10 [ 287.961515][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 287.961542][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 287.961568][ T31] ? __pfx_kthread+0x10/0x10 [ 287.961589][ T31] ret_from_fork+0x3f9/0x770 [ 287.961618][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 287.961648][ T31] ? __switch_to_asm+0x39/0x70 [ 287.961664][ T31] ? __switch_to_asm+0x33/0x70 [ 287.961680][ T31] ? __pfx_kthread+0x10/0x10 [ 287.961703][ T31] ret_from_fork_asm+0x1a/0x30 [ 287.961737][ T31] [ 287.961745][ T31] Sending NMI from CPU 1 to CPUs 0: [ 288.122994][ C0] NMI backtrace for cpu 0 [ 288.123012][ C0] CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.16.0-rc2-syzkaller-00308-gf7301f856d35 #0 PREEMPT(full) [ 288.123031][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 288.123040][ C0] RIP: 0010:its_return_thunk+0x0/0x10 [ 288.123064][ C0] Code: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 e9 4b 05 ca f5 cc [ 288.123077][ C0] RSP: 0018:ffffc90000147608 EFLAGS: 00000086 [ 288.123093][ C0] RAX: 0000000000000001 RBX: 0000000000000002 RCX: cf4f018b9d638e00 [ 288.123104][ C0] RDX: 0000000000000000 RSI: ffff88801d2a4740 RDI: ffff88801d2a3c00 [ 288.123114][ C0] RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff84c7a32b [ 288.123124][ C0] R10: ffffc900001477e8 R11: fffff52000028eff R12: 000000007d782025 [ 288.123135][ C0] R13: ffff88801d2a46f0 R14: ffff88801d2a4740 R15: 3953cd1358fe5fd6 [ 288.123147][ C0] FS: 0000000000000000(0000) GS:ffff888125c51000(0000) knlGS:0000000000000000 [ 288.123160][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 288.123171][ C0] CR2: 000056468e2fb168 CR3: 00000000314c6000 CR4: 00000000003526f0 [ 288.123187][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 288.123197][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 288.123207][ C0] Call Trace: [ 288.123213][ C0] [ 288.123219][ C0] __lock_acquire+0xab9/0xd20 [ 288.123245][ C0] ? debug_object_activate+0xbb/0x420 [ 288.123262][ C0] lock_acquire+0x120/0x360 [ 288.123281][ C0] ? debug_object_activate+0xbb/0x420 [ 288.123298][ C0] ? ktime_get+0x3e/0x1f0 [ 288.123314][ C0] ? ktime_get+0x3e/0x1f0 [ 288.123330][ C0] _raw_spin_lock_irqsave+0xa7/0xf0 [ 288.123349][ C0] ? debug_object_activate+0xbb/0x420 [ 288.123364][ C0] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 288.123383][ C0] ? ktime_get+0x3e/0x1f0 [ 288.123401][ C0] debug_object_activate+0xbb/0x420 [ 288.123420][ C0] enqueue_hrtimer+0x30/0x3a0 [ 288.123436][ C0] hrtimer_start_range_ns+0xd10/0x1080 [ 288.123462][ C0] dl_server_stop+0x43/0x90 [ 288.123483][ C0] dequeue_entities+0xfa0/0x1510 [ 288.123501][ C0] ? do_raw_spin_lock+0x121/0x290 [ 288.123523][ C0] dequeue_task_fair+0x205/0x580 [ 288.123542][ C0] __schedule+0x5a7/0x4d00 [ 288.123562][ C0] ? rcu_softirq_qs+0xf2/0x350 [ 288.123584][ C0] ? smpboot_thread_fn+0x4d/0xa60 [ 288.123607][ C0] ? schedule+0x165/0x360 [ 288.123627][ C0] ? __lock_acquire+0xab9/0xd20 [ 288.123653][ C0] ? __pfx___schedule+0x10/0x10 [ 288.123678][ C0] ? schedule+0x91/0x360 [ 288.123698][ C0] schedule+0x165/0x360 [ 288.123717][ C0] ? smpboot_thread_fn+0x4d/0xa60 [ 288.123737][ C0] smpboot_thread_fn+0x5bd/0xa60 [ 288.123758][ C0] ? smpboot_thread_fn+0x4d/0xa60 [ 288.123781][ C0] kthread+0x70e/0x8a0 [ 288.123798][ C0] ? __pfx_smpboot_thread_fn+0x10/0x10 [ 288.123819][ C0] ? __pfx_kthread+0x10/0x10 [ 288.123836][ C0] ? _raw_spin_unlock_irq+0x23/0x50 [ 288.123855][ C0] ? lockdep_hardirqs_on+0x9c/0x150 [ 288.123875][ C0] ? __pfx_kthread+0x10/0x10 [ 288.123892][ C0] ret_from_fork+0x3f9/0x770 [ 288.123913][ C0] ? __pfx_ret_from_fork+0x10/0x10 [ 288.123934][ C0] ? __switch_to_asm+0x39/0x70 [ 288.123950][ C0] ? __switch_to_asm+0x33/0x70 [ 288.123964][ C0] ? __pfx_kthread+0x10/0x10 [ 288.123980][ C0] ret_from_fork_asm+0x1a/0x30 [ 288.124000][ C0] [ 288.124008][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.014 msecs [ 288.128981][ T31] Kernel panic - not syncing: hung_task: blocked tasks [ 288.128998][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc2-syzkaller-00308-gf7301f856d35 #0 PREEMPT(full) [ 288.129020][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 288.129031][ T31] Call Trace: [ 288.129039][ T31] [ 288.129047][ T31] dump_stack_lvl+0x99/0x250 [ 288.129078][ T31] ? __asan_memcpy+0x40/0x70 [ 288.129103][ T31] ? __pfx_dump_stack_lvl+0x10/0x10 [ 288.129130][ T31] ? __pfx__printk+0x10/0x10 [ 288.129160][ T31] panic+0x2db/0x790 [ 288.129192][ T31] ? __pfx_panic+0x10/0x10 [ 288.129217][ T31] ? nmi_backtrace_stall_check+0x433/0x440 [ 288.129248][ T31] ? preempt_schedule_thunk+0x16/0x30 [ 288.129272][ T31] ? nmi_trigger_cpumask_backtrace+0x2b6/0x300 [ 288.129302][ T31] watchdog+0x102d/0x1030 [ 288.129329][ T31] ? watchdog+0x1de/0x1030 [ 288.129359][ T31] kthread+0x70e/0x8a0 [ 288.129383][ T31] ? __pfx_watchdog+0x10/0x10 [ 288.129413][ T31] ? __pfx_kthread+0x10/0x10 [ 288.129434][ T31] ? _raw_spin_unlock_irq+0x23/0x50 [ 288.129458][ T31] ? lockdep_hardirqs_on+0x9c/0x150 [ 288.129483][ T31] ? __pfx_kthread+0x10/0x10 [ 288.129504][ T31] ret_from_fork+0x3f9/0x770 [ 288.129531][ T31] ? __pfx_ret_from_fork+0x10/0x10 [ 288.129561][ T31] ? __switch_to_asm+0x39/0x70 [ 288.129579][ T31] ? __switch_to_asm+0x33/0x70 [ 288.129596][ T31] ? __pfx_kthread+0x10/0x10 [ 288.129617][ T31] ret_from_fork_asm+0x1a/0x30 [ 288.129649][ T31] [ 288.622690][ T31] Kernel Offset: disabled [ 288.627012][ T31] Rebooting in 86400 seconds..