./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1843971710 <...> Warning: Permanently added '10.128.0.6' (ED25519) to the list of known hosts. execve("./syz-executor1843971710", ["./syz-executor1843971710"], 0x7ffdaff56b90 /* 10 vars */) = 0 brk(NULL) = 0x555573123000 brk(0x555573123d00) = 0x555573123d00 arch_prctl(ARCH_SET_FS, 0x555573123380) = 0 set_tid_address(0x555573123650) = 5838 set_robust_list(0x555573123660, 24) = 0 rseq(0x555573123ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1843971710", 4096) = 28 getrandom("\xbe\xde\x3f\x62\xb3\xa3\xe0\x13", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555573123d00 brk(0x555573144d00) = 0x555573144d00 brk(0x555573145000) = 0x555573145000 mprotect(0x7fe74e8e3000, 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 write(1, "executing program\n", 18executing program ) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fe746400000 write(3, "\x02\x02\x02\x02\x02\x02\x02\x02\x74\x68\x69\x73\x20\x69\x73\x20\x61\x6e\x20\x6f\x63\x66\x73\x32\x20\x76\x6f\x6c\x75\x6d\x65\x00\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02\x02"..., 16777216) = 16777216 munmap(0x7fe746400000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file1", 0777) = 0 [ 73.256019][ T5838] loop0: detected capacity change from 0 to 32768 [ 73.298436][ T5838] ======================================================= [ 73.298436][ T5838] WARNING: The mand mount option has been deprecated and [ 73.298436][ T5838] and is ignored by this kernel. Remove the mand [ 73.298436][ T5838] option from the mount to silence this warning. [ 73.298436][ T5838] ======================================================= mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "acl,nointr,atime_quantum=00000000000000000007,localflocks,localalloc=00000000000000000003,localflock"...) = 0 openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 chdir("./file1") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) mkdirat(AT_FDCWD, "./file0", 000) = 0 [ 73.358753][ T5838] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. [ 73.408096][ T5838] [ 73.410440][ T5838] ====================================================== [ 73.417443][ T5838] WARNING: possible circular locking dependency detected [ 73.424454][ T5838] 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0 Not tainted [ 73.431566][ T5838] ------------------------------------------------------ [ 73.438579][ T5838] syz-executor184/5838 is trying to acquire lock: [ 73.444980][ T5838] ffff888052c19800 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}, at: ocfs2_reserve_suballoc_bits+0x192/0x4eb0 [ 73.458337][ T5838] [ 73.458337][ T5838] but task is already holding lock: [ 73.465684][ T5838] ffff888052c1dc78 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x633/0x1930 [ 73.475177][ T5838] [ 73.475177][ T5838] which lock already depends on the new lock. [ 73.475177][ T5838] [ 73.485563][ T5838] [ 73.485563][ T5838] the existing dependency chain (in reverse order) is: [ 73.494562][ T5838] [ 73.494562][ T5838] -> #5 (&oi->ip_xattr_sem){++++}-{3:3}: [ 73.502381][ T5838] lock_acquire+0x1ed/0x550 [ 73.507404][ T5838] down_read+0xb1/0xa40 [ 73.512090][ T5838] ocfs2_init_acl+0x397/0x930 [ 73.517279][ T5838] ocfs2_mknod+0x1c05/0x2b40 [ 73.522388][ T5838] ocfs2_mkdir+0x1ab/0x480 [ 73.527323][ T5838] vfs_mkdir+0x2fb/0x4f0 [ 73.532077][ T5838] do_mkdirat+0x264/0x3a0 [ 73.536916][ T5838] __x64_sys_mkdirat+0x87/0xa0 [ 73.542190][ T5838] do_syscall_64+0xf3/0x230 [ 73.547230][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.553663][ T5838] [ 73.553663][ T5838] -> #4 (jbd2_handle){.+.+}-{0:0}: [ 73.560959][ T5838] lock_acquire+0x1ed/0x550 [ 73.565985][ T5838] start_this_handle+0x1eb4/0x2110 [ 73.571622][ T5838] jbd2__journal_start+0x2da/0x5d0 [ 73.577255][ T5838] jbd2_journal_start+0x29/0x40 [ 73.582629][ T5838] ocfs2_start_trans+0x3c9/0x700 [ 73.588077][ T5838] ocfs2_mknod+0x150c/0x2b40 [ 73.593209][ T5838] ocfs2_mkdir+0x1ab/0x480 [ 73.598144][ T5838] vfs_mkdir+0x2fb/0x4f0 [ 73.602896][ T5838] do_mkdirat+0x264/0x3a0 [ 73.607734][ T5838] __x64_sys_mkdirat+0x87/0xa0 [ 73.613008][ T5838] do_syscall_64+0xf3/0x230 [ 73.618034][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.624457][ T5838] [ 73.624457][ T5838] -> #3 (&journal->j_trans_barrier){.+.+}-{3:3}: [ 73.633234][ T5838] lock_acquire+0x1ed/0x550 [ 73.638262][ T5838] down_read+0xb1/0xa40 [ 73.642934][ T5838] ocfs2_start_trans+0x3be/0x700 [ 73.648382][ T5838] ocfs2_mknod+0x150c/0x2b40 [ 73.653514][ T5838] ocfs2_mkdir+0x1ab/0x480 [ 73.658450][ T5838] vfs_mkdir+0x2fb/0x4f0 [ 73.663204][ T5838] do_mkdirat+0x264/0x3a0 [ 73.668045][ T5838] __x64_sys_mkdirat+0x87/0xa0 [ 73.673317][ T5838] do_syscall_64+0xf3/0x230 [ 73.678333][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.684736][ T5838] [ 73.684736][ T5838] -> #2 (sb_internal#2){.+.+}-{0:0}: [ 73.692220][ T5838] lock_acquire+0x1ed/0x550 [ 73.697248][ T5838] ocfs2_start_trans+0x2b9/0x700 [ 73.702696][ T5838] ocfs2_mknod+0x150c/0x2b40 [ 73.707804][ T5838] ocfs2_mkdir+0x1ab/0x480 [ 73.712743][ T5838] vfs_mkdir+0x2fb/0x4f0 [ 73.717492][ T5838] do_mkdirat+0x264/0x3a0 [ 73.722329][ T5838] __x64_sys_mkdirat+0x87/0xa0 [ 73.727602][ T5838] do_syscall_64+0xf3/0x230 [ 73.732620][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.739023][ T5838] [ 73.739023][ T5838] -> #1 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{3:3}: [ 73.749548][ T5838] lock_acquire+0x1ed/0x550 [ 73.754575][ T5838] down_write+0x99/0x220 [ 73.759336][ T5838] ocfs2_reserve_local_alloc_bits+0x132/0x2870 [ 73.766098][ T5838] ocfs2_reserve_clusters_with_limit+0x1b8/0xb60 [ 73.772962][ T5838] ocfs2_mknod+0x1486/0x2b40 [ 73.778072][ T5838] ocfs2_mkdir+0x1ab/0x480 [ 73.783007][ T5838] vfs_mkdir+0x2fb/0x4f0 [ 73.787761][ T5838] do_mkdirat+0x264/0x3a0 [ 73.792599][ T5838] __x64_sys_mkdirat+0x87/0xa0 [ 73.797871][ T5838] do_syscall_64+0xf3/0x230 [ 73.802891][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.809295][ T5838] [ 73.809295][ T5838] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3){+.+.}-{3:3}: [ 73.819905][ T5838] validate_chain+0x18ef/0x5920 [ 73.825278][ T5838] __lock_acquire+0x1384/0x2050 [ 73.830649][ T5838] lock_acquire+0x1ed/0x550 [ 73.835671][ T5838] down_write+0x99/0x220 [ 73.840430][ T5838] ocfs2_reserve_suballoc_bits+0x192/0x4eb0 [ 73.846845][ T5838] ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0 [ 73.853693][ T5838] ocfs2_init_xattr_set_ctxt+0x3a6/0x900 [ 73.859840][ T5838] ocfs2_xattr_set+0xf4e/0x1930 [ 73.865204][ T5838] __vfs_setxattr+0x46a/0x4a0 [ 73.870392][ T5838] __vfs_setxattr_noperm+0x12e/0x660 [ 73.876219][ T5838] vfs_setxattr+0x221/0x430 [ 73.881234][ T5838] path_setxattr+0x37e/0x4d0 [ 73.886338][ T5838] __x64_sys_lsetxattr+0xb8/0xd0 [ 73.891791][ T5838] do_syscall_64+0xf3/0x230 [ 73.896832][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 73.903243][ T5838] [ 73.903243][ T5838] other info that might help us debug this: [ 73.903243][ T5838] [ 73.913486][ T5838] Chain exists of: [ 73.913486][ T5838] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3 --> jbd2_handle --> &oi->ip_xattr_sem [ 73.913486][ T5838] [ 73.929258][ T5838] Possible unsafe locking scenario: [ 73.929258][ T5838] [ 73.936692][ T5838] CPU0 CPU1 [ 73.942047][ T5838] ---- ---- [ 73.947394][ T5838] lock(&oi->ip_xattr_sem); [ 73.951984][ T5838] lock(jbd2_handle); [ 73.958572][ T5838] lock(&oi->ip_xattr_sem); [ 73.965697][ T5838] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#3); [ 73.973002][ T5838] [ 73.973002][ T5838] *** DEADLOCK *** [ 73.973002][ T5838] [ 73.981158][ T5838] 3 locks held by syz-executor184/5838: [ 73.986690][ T5838] #0: ffff88814df18420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 [ 73.995863][ T5838] #1: ffff888052c1df40 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: vfs_setxattr+0x1e1/0x430 [ 74.006323][ T5838] #2: ffff888052c1dc78 (&oi->ip_xattr_sem){++++}-{3:3}, at: ocfs2_xattr_set+0x633/0x1930 [ 74.016265][ T5838] [ 74.016265][ T5838] stack backtrace: [ 74.022317][ T5838] CPU: 0 UID: 0 PID: 5838 Comm: syz-executor184 Not tainted 6.12.0-rc5-syzkaller-00044-gc1e939a21eb1 #0 [ 74.033442][ T5838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 74.043508][ T5838] Call Trace: [ 74.046774][ T5838] [ 74.049693][ T5838] dump_stack_lvl+0x241/0x360 [ 74.054373][ T5838] ? __pfx_dump_stack_lvl+0x10/0x10 [ 74.059563][ T5838] ? __pfx__printk+0x10/0x10 [ 74.064148][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.069779][ T5838] print_circular_bug+0x13a/0x1b0 [ 74.074802][ T5838] check_noncircular+0x36a/0x4a0 [ 74.079732][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.085366][ T5838] ? __pfx_check_noncircular+0x10/0x10 [ 74.090817][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.096447][ T5838] ? lockdep_lock+0x123/0x2b0 [ 74.101126][ T5838] validate_chain+0x18ef/0x5920 [ 74.106009][ T5838] ? __pfx_validate_chain+0x10/0x10 [ 74.111206][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.116843][ T5838] ? mark_lock+0x9a/0x360 [ 74.121169][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.126810][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.132453][ T5838] ? ocfs2_get_system_file_inode+0x1d4/0x7b0 [ 74.138434][ T5838] ? __pfx_lock_release+0x10/0x10 [ 74.143461][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.149092][ T5838] ? mark_lock+0x9a/0x360 [ 74.153419][ T5838] __lock_acquire+0x1384/0x2050 [ 74.158279][ T5838] lock_acquire+0x1ed/0x550 [ 74.162790][ T5838] ? ocfs2_reserve_suballoc_bits+0x192/0x4eb0 [ 74.168866][ T5838] ? __pfx_lock_acquire+0x10/0x10 [ 74.173892][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.179524][ T5838] ? __pfx___might_resched+0x10/0x10 [ 74.184809][ T5838] ? __pfx_ocfs2_get_system_file_inode+0x10/0x10 [ 74.191137][ T5838] ? __lock_acquire+0x1384/0x2050 [ 74.196170][ T5838] down_write+0x99/0x220 [ 74.200415][ T5838] ? ocfs2_reserve_suballoc_bits+0x192/0x4eb0 [ 74.206492][ T5838] ? __pfx_down_write+0x10/0x10 [ 74.211347][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.216980][ T5838] ocfs2_reserve_suballoc_bits+0x192/0x4eb0 [ 74.222883][ T5838] ? mark_lock+0x9a/0x360 [ 74.227205][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.232835][ T5838] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 74.238844][ T5838] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 74.245173][ T5838] ? _raw_spin_unlock_irqrestore+0x8f/0x140 [ 74.251058][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.256687][ T5838] ? lockdep_hardirqs_on+0x99/0x150 [ 74.261884][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.267514][ T5838] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 74.273398][ T5838] ? __pfx__raw_spin_unlock_irqrestore+0x10/0x10 [ 74.279721][ T5838] ? __pfx_ocfs2_reserve_suballoc_bits+0x10/0x10 [ 74.286062][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.291692][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.297356][ T5838] ? stack_depot_save_flags+0x6e4/0x830 [ 74.302907][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.308539][ T5838] ? kasan_save_track+0x51/0x80 [ 74.313390][ T5838] ? kasan_save_track+0x3f/0x80 [ 74.318233][ T5838] ? __kasan_kmalloc+0x98/0xb0 [ 74.322990][ T5838] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 74.328536][ T5838] ? ocfs2_reserve_new_metadata_blocks+0x117/0x9c0 [ 74.335039][ T5838] ? ocfs2_init_xattr_set_ctxt+0x3a6/0x900 [ 74.340837][ T5838] ? ocfs2_xattr_set+0xf4e/0x1930 [ 74.345854][ T5838] ? __vfs_setxattr+0x46a/0x4a0 [ 74.350699][ T5838] ? __vfs_setxattr_noperm+0x12e/0x660 [ 74.356178][ T5838] ? vfs_setxattr+0x221/0x430 [ 74.360846][ T5838] ? path_setxattr+0x37e/0x4d0 [ 74.365604][ T5838] ? __x64_sys_lsetxattr+0xb8/0xd0 [ 74.370707][ T5838] ? do_syscall_64+0xf3/0x230 [ 74.375383][ T5838] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.381460][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.387093][ T5838] ? __kasan_kmalloc+0x98/0xb0 [ 74.391858][ T5838] ? ocfs2_reserve_new_metadata_blocks+0x117/0x9c0 [ 74.398385][ T5838] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 74.403930][ T5838] ocfs2_reserve_new_metadata_blocks+0x41c/0x9c0 [ 74.410265][ T5838] ? __pfx_ocfs2_reserve_new_metadata_blocks+0x10/0x10 [ 74.417116][ T5838] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10 [ 74.423274][ T5838] ? ocfs2_xattr_set+0xf00/0x1930 [ 74.428292][ T5838] ocfs2_init_xattr_set_ctxt+0x3a6/0x900 [ 74.433924][ T5838] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10 [ 74.440071][ T5838] ? up_write+0x1a9/0x590 [ 74.444398][ T5838] ? __pfx_ocfs2_truncate_log_needs_flush+0x10/0x10 [ 74.450977][ T5838] ? __pfx_up_write+0x10/0x10 [ 74.455646][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.461274][ T5838] ? __kmalloc_cache_noprof+0x19c/0x2c0 [ 74.466819][ T5838] ocfs2_xattr_set+0xf4e/0x1930 [ 74.471670][ T5838] ? __pfx_ocfs2_xattr_set+0x10/0x10 [ 74.476952][ T5838] ? __pfx_stack_trace_save+0x10/0x10 [ 74.482333][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.487992][ T5838] ? lockdep_unlock+0x16a/0x300 [ 74.492861][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.498523][ T5838] ? mark_lock+0x2ae/0x360 [ 74.502944][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.508595][ T5838] ? aa_get_newest_label+0xff/0x6f0 [ 74.513818][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.519451][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.525080][ T5838] ? posix_xattr_acl+0xa9/0xd0 [ 74.529841][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.535472][ T5838] ? evm_protect_xattr+0x4be/0xb30 [ 74.540599][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.546231][ T5838] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10 [ 74.552213][ T5838] __vfs_setxattr+0x46a/0x4a0 [ 74.556888][ T5838] __vfs_setxattr_noperm+0x12e/0x660 [ 74.562171][ T5838] vfs_setxattr+0x221/0x430 [ 74.566669][ T5838] ? __pfx_vfs_setxattr+0x10/0x10 [ 74.571682][ T5838] ? srso_alias_return_thunk+0x5/0xfbef5 [ 74.577350][ T5838] path_setxattr+0x37e/0x4d0 [ 74.581945][ T5838] ? __pfx_path_setxattr+0x10/0x10 [ 74.587072][ T5838] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 74.593438][ T5838] ? do_syscall_64+0x100/0x230 [ 74.598199][ T5838] __x64_sys_lsetxattr+0xb8/0xd0 [ 74.603135][ T5838] do_syscall_64+0xf3/0x230 [ 74.607665][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 74.613597][ T5838] RIP: 0033:0x7fe74e86ca39 [ 74.618004][ T5838] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48 [ 74.637609][ T5838] RSP: 002b:00007ffcf57aa928 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd [ 74.646056][ T5838] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fe74e86ca39 [ 74.654024][ T5838] RDX: 00000000200002c0 RSI: 0000000020000180 RDI: 0000000020000100 lsetxattr("./file0", "trusted.overlay.upper", "\xed\x72\x69\x7d\xb9\x18\xe2\x43\xd2\xb6\xff\x63\x87\xd7\x3f\xdd\xe9\xc5\x75\x72\xd4\xd7\xde\x2f\xd9\xcd\xcb\x57\xff\x7b\xe7\x42\x08\x9f\x2f\x7e\xf9\x62\x7b\x7b\x7b\x3b\x54\xf5\x87\xb6\xc6\x9a\x7e\xff\xee\xdb\x47\x0b\xcd\xc7\x86\x38\x53\xa7\xda\x6e\xfb\xd6\x0e\xca\x1b\x21\x84\xb3\x2d\xe3\xaa\xea\x0b\x21\xfc\xff\xb3\x10\xa2\x10\xc2\xa5\x24\x6d\x32\x39\x0e\x86\x10\x4e\x85\x7a\xde\x9d\x47\xef\xdd\xcd"..., 178, 0) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 74.662019][ T5838