./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3864570949 <...> Warning: Permanently added '10.128.1.21' (ED25519) to the list of known hosts. execve("./syz-executor3864570949", ["./syz-executor3864570949"], 0x7ffed4ee2080 /* 10 vars */) = 0 brk(NULL) = 0x5555897f2000 brk(0x5555897f2d00) = 0x5555897f2d00 arch_prctl(ARCH_SET_FS, 0x5555897f2380) = 0 set_tid_address(0x5555897f2650) = 5837 set_robust_list(0x5555897f2660, 24) = 0 rseq(0x5555897f2ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3864570949", 4096) = 28 getrandom("\x7f\xfa\x97\x05\x62\x66\xc4\x3a", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555897f2d00 brk(0x555589813d00) = 0x555589813d00 brk(0x555589814000) = 0x555589814000 mprotect(0x7f2765cdd000, 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 5838 attached [pid 5838] set_robust_list(0x5555897f2660, 24 [pid 5837] <... clone resumed>, child_tidptr=0x5555897f2650) = 5838 [pid 5838] <... set_robust_list resumed>) = 0 [pid 5838] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5838] setpgid(0, 0) = 0 [pid 5838] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5838] write(3, "1000", 4) = 4 [pid 5838] close(3) = 0 [pid 5838] write(1, "executing program\n", 18executing program ) = 18 [pid 5838] memfd_create("syzkaller", 0) = 3 [pid 5838] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5838] 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 [pid 5838] munmap(0x7f275d800000, 138412032) = 0 [pid 5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5838] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5838] close(3) = 0 [pid 5838] close(4) = 0 [pid 5838] mkdir("./file1", 0777) = 0 [ 70.975569][ T5838] loop0: detected capacity change from 0 to 32768 [ 71.016353][ T5838] ======================================================= [ 71.016353][ T5838] WARNING: The mand mount option has been deprecated and [ 71.016353][ T5838] and is ignored by this kernel. Remove the mand [ 71.016353][ T5838] option from the mount to silence this warning. [ 71.016353][ T5838] ======================================================= [pid 5838] mount("/dev/loop0", "./file1", "ocfs2", MS_SYNCHRONOUS|MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME|MS_LAZYTIME, "acl,heartbeat=none,nouser_xattr,coherency=full,data=writeback,localalloc=00000000000000000001,acl,no"...) = 0 [pid 5838] openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 [pid 5838] chdir("./file1") = 0 [pid 5838] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5838] mkdir("./file0", 000) = 0 [pid 5838] mkdirat(AT_FDCWD, "./file1", 000) = 0 [pid 5838] mkdir("./bus", 000) = 0 [ 71.066716][ T5838] ocfs2: Mounting device (7,0) on (node local, slot 0) with writeback data mode. [ 71.127230][ T5838] overlayfs: upper fs does not support tmpfile. [ 71.135291][ T5838] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 71.142600][ T5838] [ 71.144923][ T5838] ====================================================== [ 71.151916][ T5838] WARNING: possible circular locking dependency detected [ 71.158923][ T5838] 6.16.0-rc5-syzkaller-00193-g40f92e79b0aa #0 Not tainted [ 71.166001][ T5838] ------------------------------------------------------ [ 71.172996][ T5838] syz-executor386/5838 is trying to acquire lock: [ 71.179380][ T5838] ffff88807c565100 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}, at: ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 71.192594][ T5838] [ 71.192594][ T5838] but task is already holding lock: [ 71.199936][ T5838] ffff88807c569538 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 71.209389][ T5838] [ 71.209389][ T5838] which lock already depends on the new lock. [ 71.209389][ T5838] [ 71.219763][ T5838] [ 71.219763][ T5838] the existing dependency chain (in reverse order) is: [ 71.229012][ T5838] [ 71.229012][ T5838] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}: [ 71.236804][ T5838] lock_acquire+0x120/0x360 [ 71.241806][ T5838] down_write+0x96/0x1f0 [ 71.246557][ T5838] ocfs2_xattr_set_handle+0x3b0/0x7a0 [ 71.252441][ T5838] ocfs2_init_security_set+0xbd/0xe0 [ 71.258233][ T5838] ocfs2_mknod+0x137f/0x2050 [ 71.263334][ T5838] ocfs2_mkdir+0x191/0x440 [ 71.268256][ T5838] vfs_mkdir+0x306/0x510 [ 71.273003][ T5838] do_mkdirat+0x247/0x590 [ 71.277840][ T5838] __x64_sys_mkdir+0x6c/0x80 [ 71.282938][ T5838] do_syscall_64+0xfa/0x3b0 [ 71.287944][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.294347][ T5838] [ 71.294347][ T5838] -> #3 (jbd2_handle){.+.+}-{0:0}: [ 71.301646][ T5838] lock_acquire+0x120/0x360 [ 71.306657][ T5838] start_this_handle+0x1fa7/0x21c0 [ 71.312274][ T5838] jbd2__journal_start+0x2c1/0x5b0 [ 71.317888][ T5838] jbd2_journal_start+0x2a/0x40 [ 71.323241][ T5838] ocfs2_start_trans+0x376/0x6d0 [ 71.328683][ T5838] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 71.335077][ T5838] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 71.341911][ T5838] ocfs2_mknod+0xe08/0x2050 [ 71.346925][ T5838] ocfs2_mkdir+0x191/0x440 [ 71.351850][ T5838] vfs_mkdir+0x306/0x510 [ 71.356597][ T5838] do_mkdirat+0x247/0x590 [ 71.361434][ T5838] __x64_sys_mkdir+0x6c/0x80 [ 71.366531][ T5838] do_syscall_64+0xfa/0x3b0 [ 71.371541][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.377940][ T5838] [ 71.377940][ T5838] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: [ 71.386441][ T5838] lock_acquire+0x120/0x360 [ 71.391446][ T5838] down_read+0x46/0x2e0 [ 71.396104][ T5838] ocfs2_start_trans+0x36a/0x6d0 [ 71.401548][ T5838] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 71.407947][ T5838] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 71.414779][ T5838] ocfs2_mknod+0xe08/0x2050 [ 71.419790][ T5838] ocfs2_mkdir+0x191/0x440 [ 71.424714][ T5838] vfs_mkdir+0x306/0x510 [ 71.429461][ T5838] do_mkdirat+0x247/0x590 [ 71.434295][ T5838] __x64_sys_mkdir+0x6c/0x80 [ 71.439390][ T5838] do_syscall_64+0xfa/0x3b0 [ 71.444395][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.450788][ T5838] [ 71.450788][ T5838] -> #1 (sb_internal#2){.+.+}-{0:0}: [ 71.458252][ T5838] lock_acquire+0x120/0x360 [ 71.463258][ T5838] ocfs2_start_trans+0x26b/0x6d0 [ 71.468697][ T5838] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 71.475094][ T5838] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 71.481924][ T5838] ocfs2_mknod+0xe08/0x2050 [ 71.486933][ T5838] ocfs2_mkdir+0x191/0x440 [ 71.491857][ T5838] vfs_mkdir+0x306/0x510 [ 71.496607][ T5838] do_mkdirat+0x247/0x590 [ 71.501442][ T5838] __x64_sys_mkdir+0x6c/0x80 [ 71.506539][ T5838] do_syscall_64+0xfa/0x3b0 [ 71.511554][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.517950][ T5838] [ 71.517950][ T5838] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4){+.+.}-{4:4}: [ 71.528799][ T5838] validate_chain+0xb9b/0x2140 [ 71.534069][ T5838] __lock_acquire+0xab9/0xd20 [ 71.539245][ T5838] lock_acquire+0x120/0x360 [ 71.544250][ T5838] down_write+0x96/0x1f0 [ 71.548997][ T5838] ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 71.555393][ T5838] ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 [ 71.562224][ T5838] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 71.568361][ T5838] ocfs2_xattr_set+0xb70/0x11f0 [ 71.573718][ T5838] __vfs_setxattr+0x43c/0x480 [ 71.578900][ T5838] __vfs_setxattr_noperm+0x12d/0x660 [ 71.584695][ T5838] vfs_setxattr+0x16b/0x2f0 [ 71.589706][ T5838] ovl_get_workdir+0xbb7/0x1730 [ 71.595063][ T5838] ovl_fill_super+0x1386/0x35d0 [ 71.600418][ T5838] get_tree_nodev+0xbb/0x150 [ 71.605514][ T5838] vfs_get_tree+0x92/0x2b0 [ 71.610441][ T5838] do_new_mount+0x24a/0xa40 [ 71.615457][ T5838] __se_sys_mount+0x317/0x410 [ 71.620636][ T5838] do_syscall_64+0xfa/0x3b0 [ 71.625640][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.632058][ T5838] [ 71.632058][ T5838] other info that might help us debug this: [ 71.632058][ T5838] [ 71.642274][ T5838] Chain exists of: [ 71.642274][ T5838] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4 --> jbd2_handle --> &oi->ip_xattr_sem [ 71.642274][ T5838] [ 71.658001][ T5838] Possible unsafe locking scenario: [ 71.658001][ T5838] [ 71.665434][ T5838] CPU0 CPU1 [ 71.670778][ T5838] ---- ---- [ 71.676125][ T5838] lock(&oi->ip_xattr_sem); [ 71.680701][ T5838] lock(jbd2_handle); [ 71.687297][ T5838] lock(&oi->ip_xattr_sem); [ 71.694395][ T5838] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#4); [ 71.701673][ T5838] [ 71.701673][ T5838] *** DEADLOCK *** [ 71.701673][ T5838] [ 71.709798][ T5838] 4 locks held by syz-executor386/5838: [ 71.715328][ T5838] #0: ffff88807f32c0e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 [ 71.725424][ T5838] #1: ffff888079bbe428 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 71.734559][ T5838] #2: ffff88807c569800 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0 [ 71.744997][ T5838] #3: ffff88807c569538 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 71.754903][ T5838] [ 71.754903][ T5838] stack backtrace: [ 71.760786][ T5838] CPU: 1 UID: 0 PID: 5838 Comm: syz-executor386 Not tainted 6.16.0-rc5-syzkaller-00193-g40f92e79b0aa #0 PREEMPT(full) [ 71.760803][ T5838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 71.760816][ T5838] Call Trace: [ 71.760824][ T5838] [ 71.760831][ T5838] dump_stack_lvl+0x189/0x250 [ 71.760847][ T5838] ? __pfx_dump_stack_lvl+0x10/0x10 [ 71.760861][ T5838] ? __pfx__printk+0x10/0x10 [ 71.760876][ T5838] ? print_lock_name+0xde/0x100 [ 71.760892][ T5838] print_circular_bug+0x2ee/0x310 [ 71.760908][ T5838] check_noncircular+0x134/0x160 [ 71.760924][ T5838] validate_chain+0xb9b/0x2140 [ 71.760939][ T5838] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 71.760953][ T5838] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 71.760968][ T5838] __lock_acquire+0xab9/0xd20 [ 71.760982][ T5838] ? ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 71.760994][ T5838] lock_acquire+0x120/0x360 [ 71.761005][ T5838] ? ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 71.761018][ T5838] ? __kasan_check_byte+0x12/0x40 [ 71.761035][ T5838] ? unwind_next_frame+0xa5/0x2390 [ 71.761050][ T5838] down_write+0x96/0x1f0 [ 71.761062][ T5838] ? ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 71.761075][ T5838] ? __pfx_down_write+0x10/0x10 [ 71.761088][ T5838] ? lock_release+0x4b/0x3e0 [ 71.761100][ T5838] ocfs2_reserve_suballoc_bits+0x15e/0x4640 [ 71.761114][ T5838] ? is_bpf_text_address+0x26/0x2b0 [ 71.761127][ T5838] ? kernel_text_address+0xa5/0xe0 [ 71.761145][ T5838] ? __kernel_text_address+0xd/0x40 [ 71.761162][ T5838] ? unwind_get_return_address+0x4d/0x90 [ 71.761174][ T5838] ? __pfx_stack_trace_consume_entry+0x10/0x10 [ 71.761190][ T5838] ? arch_stack_walk+0xfc/0x150 [ 71.761207][ T5838] ? stack_trace_save+0x9c/0xe0 [ 71.761222][ T5838] ? __pfx_ocfs2_reserve_suballoc_bits+0x10/0x10 [ 71.761236][ T5838] ? check_path+0x21/0x40 [ 71.761249][ T5838] ? check_noncircular+0xe0/0x160 [ 71.761264][ T5838] ? lockdep_unlock+0x89/0x120 [ 71.761280][ T5838] ? validate_chain+0x897/0x2140 [ 71.761294][ T5838] ? get_tree_nodev+0xbb/0x150 [ 71.761315][ T5838] ? __lock_acquire+0xab9/0xd20 [ 71.761332][ T5838] ? do_raw_spin_unlock+0x122/0x240 [ 71.761349][ T5838] ? _raw_spin_unlock+0x28/0x50 [ 71.761364][ T5838] ? ocfs2_alloc_should_use_local+0x152/0x310 [ 71.761380][ T5838] ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0 [ 71.761394][ T5838] ocfs2_reserve_clusters_with_limit+0x2fb/0xba0 [ 71.761409][ T5838] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10 [ 71.761426][ T5838] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10 [ 71.761443][ T5838] ? __lock_acquire+0xab9/0xd20 [ 71.761457][ T5838] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 71.761474][ T5838] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10 [ 71.761495][ T5838] ? ocfs2_xattr_set+0xb36/0x11f0 [ 71.761509][ T5838] ? up_write+0x1c4/0x420 [ 71.761522][ T5838] ? ocfs2_xattr_set+0x334/0x11f0 [ 71.761537][ T5838] ocfs2_xattr_set+0xb70/0x11f0 [ 71.761557][ T5838] ? __pfx_ocfs2_xattr_set+0x10/0x10 [ 71.761570][ T5838] ? up+0xde/0x150 [ 71.761583][ T5838] ? smack_log+0xef/0x3f0 [ 71.761598][ T5838] ? __pfx___console_unlock+0x10/0x10 [ 71.761613][ T5838] ? smk_access+0x14c/0x4e0 [ 71.761628][ T5838] ? smk_tskacc+0x2fc/0x370 [ 71.761643][ T5838] ? posix_xattr_acl+0x93/0xc0 [ 71.761656][ T5838] ? evm_protect_xattr+0x4d4/0xa90 [ 71.761670][ T5838] ? __pfx_evm_protect_xattr+0x10/0x10 [ 71.761681][ T5838] ? safesetid_security_capable+0xa9/0x1a0 [ 71.761699][ T5838] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10 [ 71.761713][ T5838] __vfs_setxattr+0x43c/0x480 [ 71.761734][ T5838] __vfs_setxattr_noperm+0x12d/0x660 [ 71.761754][ T5838] vfs_setxattr+0x16b/0x2f0 [ 71.761774][ T5838] ? __pfx_vfs_setxattr+0x10/0x10 [ 71.761792][ T5838] ? up_write+0x1c4/0x420 [ 71.761807][ T5838] ovl_get_workdir+0xbb7/0x1730 [ 71.761823][ T5838] ? __pfx_ovl_get_workdir+0x10/0x10 [ 71.761844][ T5838] ? do_raw_spin_unlock+0x122/0x240 [ 71.761860][ T5838] ? _raw_spin_unlock+0x28/0x50 [ 71.761875][ T5838] ? ovl_inuse_trylock+0xae/0xf0 [ 71.761888][ T5838] ovl_fill_super+0x1386/0x35d0 [ 71.761903][ T5838] ? rcu_is_watching+0x15/0xb0 [ 71.761919][ T5838] ? shrinker_register+0x124/0x230 [ 71.761934][ T5838] ? __pfx_ovl_fill_super+0x10/0x10 [ 71.761947][ T5838] ? __pfx___mutex_lock+0x10/0x10 [ 71.761958][ T5838] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 71.761972][ T5838] ? __raw_spin_lock_init+0x45/0x100 [ 71.761991][ T5838] ? sget_fc+0x962/0xa40 [ 71.762005][ T5838] ? __pfx_set_anon_super_fc+0x10/0x10 [ 71.762020][ T5838] ? __pfx_ovl_fill_super+0x10/0x10 [ 71.762032][ T5838] get_tree_nodev+0xbb/0x150 [ 71.762048][ T5838] vfs_get_tree+0x92/0x2b0 [ 71.762065][ T5838] do_new_mount+0x24a/0xa40 [ 71.762085][ T5838] __se_sys_mount+0x317/0x410 [ 71.762098][ T5838] ? __pfx___se_sys_mount+0x10/0x10 [ 71.762109][ T5838] ? rcu_is_watching+0x15/0xb0 [ 71.762123][ T5838] ? __x64_sys_mount+0x20/0xc0 [ 71.762135][ T5838] do_syscall_64+0xfa/0x3b0 [ 71.762146][ T5838] ? lockdep_hardirqs_on+0x9c/0x150 [ 71.762163][ T5838] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.762176][ T5838] ? clear_bhb_loop+0x60/0xb0 [ 71.762189][ T5838] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 71.762202][ T5838] RIP: 0033:0x7f2765c65bd9 [ 71.762217][ T5838] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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 [ 71.762228][ T5838] RSP: 002b:00007ffd5d421e28 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 [ 71.762242][ T5838] RAX: ffffffffffffffda RBX: 0000200000000400 RCX: 00007f2765c65bd9 [ 71.762252][ T5838] RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 0000000000000000 [ 71.762260][ T5838] RBP: 0031656c69662f2e R08: 0000200000000400 R09: 00005555897f34c0 [ 71.762269][ T5838] R10: 0000000001000000 R11: 0000000000000246 R12: 00007ffd5d421e50 [ 71.762278][ T5838] R13: 00007ffd5d422078 R14: 431bde82d7b634db R15: 00007f2765cae03b [ 71.762291][ T5838] [pid 5838] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5838] exit_group(0) = ? [pid 5838] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5838, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=21 /* 0.21 s */} --- [ 72.330900][ T5838] overlayfs: upper fs missing required features. restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5842 attached , child_tidptr=0x5555897f2650) = 5842 [pid 5842] set_robust_list(0x5555897f2660, 24) = 0 [pid 5842] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5842] setpgid(0, 0) = 0 [pid 5842] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5842] write(3, "1000", 4) = 4 [pid 5842] close(3) = 0 executing program [pid 5842] write(1, "executing program\n", 18) = 18 [pid 5842] memfd_create("syzkaller", 0) = 3 [pid 5842] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5842] 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 [pid 5842] munmap(0x7f275d800000, 138412032) = 0 [pid 5842] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5842] close(3) = 0 [pid 5842] mkdir("./file0", 000) = 0 [pid 5842] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5842] mkdir("./bus", 000) = 0 [pid 5842] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5842] exit_group(0) = ? [pid 5842] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5842, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5843 attached , child_tidptr=0x5555897f2650) = 5843 [pid 5843] set_robust_list(0x5555897f2660, 24) = 0 [pid 5843] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 72.586565][ T5842] overlayfs: workdir and upperdir must reside under the same mount [pid 5843] setpgid(0, 0) = 0 [pid 5843] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5843] write(3, "1000", 4) = 4 [pid 5843] close(3) = 0 executing program [pid 5843] write(1, "executing program\n", 18) = 18 [pid 5843] memfd_create("syzkaller", 0) = 3 [pid 5843] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5843] 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 [pid 5843] munmap(0x7f275d800000, 138412032) = 0 [pid 5843] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5843] close(3) = 0 [pid 5843] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5843] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5843] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5843] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5843] exit_group(0) = ? [pid 5843] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5843, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5844 attached , child_tidptr=0x5555897f2650) = 5844 [pid 5844] set_robust_list(0x5555897f2660, 24) = 0 [pid 5844] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 72.802979][ T5843] overlayfs: workdir and upperdir must reside under the same mount [pid 5844] setpgid(0, 0) = 0 [pid 5844] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5844] write(3, "1000", 4) = 4 [pid 5844] close(3) = 0 [pid 5844] write(1, "executing program\n", 18executing program ) = 18 [pid 5844] memfd_create("syzkaller", 0) = 3 [pid 5844] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5844] 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 [pid 5844] munmap(0x7f275d800000, 138412032) = 0 [pid 5844] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5844] close(3) = 0 [pid 5844] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5844] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5844] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5844] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5844] exit_group(0) = ? [pid 5844] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5844, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5845 attached , child_tidptr=0x5555897f2650) = 5845 [pid 5845] set_robust_list(0x5555897f2660, 24) = 0 [pid 5845] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 73.054110][ T5844] overlayfs: workdir and upperdir must reside under the same mount [pid 5845] setpgid(0, 0) = 0 [pid 5845] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5845] write(3, "1000", 4) = 4 [pid 5845] close(3) = 0 [pid 5845] write(1, "executing program\n", 18executing program ) = 18 [pid 5845] memfd_create("syzkaller", 0) = 3 [pid 5845] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5845] 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 [pid 5845] munmap(0x7f275d800000, 138412032) = 0 [pid 5845] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5845] close(3) = 0 [pid 5845] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5845] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5845] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5845] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5845] exit_group(0) = ? [pid 5845] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5845, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 73.295075][ T5845] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5846 attached , child_tidptr=0x5555897f2650) = 5846 [pid 5846] set_robust_list(0x5555897f2660, 24) = 0 [pid 5846] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5846] setpgid(0, 0) = 0 [pid 5846] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5846] write(3, "1000", 4) = 4 [pid 5846] close(3) = 0 [pid 5846] write(1, "executing program\n", 18executing program ) = 18 [pid 5846] memfd_create("syzkaller", 0) = 3 [pid 5846] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5846] 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 [pid 5846] munmap(0x7f275d800000, 138412032) = 0 [pid 5846] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5846] close(3) = 0 [pid 5846] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5846] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5846] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5846] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5846] exit_group(0) = ? [pid 5846] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5846, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555897f2650) = 5847 ./strace-static-x86_64: Process 5847 attached [pid 5847] set_robust_list(0x5555897f2660, 24) = 0 [pid 5847] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [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(3executing program ) = 0 [pid 5847] write(1, "executing program\n", 18) = 18 [pid 5847] memfd_create("syzkaller", 0) = 3 [pid 5847] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [ 73.553522][ T5846] overlayfs: workdir and upperdir must reside under the same mount [pid 5847] 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 [pid 5847] munmap(0x7f275d800000, 138412032) = 0 [pid 5847] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5847] close(3) = 0 [pid 5847] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5847] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5847] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5847] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5847] exit_group(0) = ? [pid 5847] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5847, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5848 attached , child_tidptr=0x5555897f2650) = 5848 [pid 5848] set_robust_list(0x5555897f2660, 24) = 0 [pid 5848] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 73.711534][ T5847] overlayfs: workdir and upperdir must reside under the same mount [pid 5848] setpgid(0, 0) = 0 [pid 5848] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5848] write(3, "1000", 4) = 4 [pid 5848] close(3) = 0 executing program [pid 5848] write(1, "executing program\n", 18) = 18 [pid 5848] memfd_create("syzkaller", 0) = 3 [pid 5848] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5848] 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 [pid 5848] munmap(0x7f275d800000, 138412032) = 0 [pid 5848] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5848] close(3) = 0 [pid 5848] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5848] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5848] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5848] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5848] exit_group(0) = ? [pid 5848] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5848, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5849 attached , child_tidptr=0x5555897f2650) = 5849 [ 73.985432][ T5848] overlayfs: workdir and upperdir must reside under the same mount [pid 5849] set_robust_list(0x5555897f2660, 24) = 0 [pid 5849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5849] setpgid(0, 0) = 0 [pid 5849] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5849] write(3, "1000", 4) = 4 [pid 5849] close(3) = 0 executing program [pid 5849] write(1, "executing program\n", 18) = 18 [pid 5849] memfd_create("syzkaller", 0) = 3 [pid 5849] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5849] 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 [pid 5849] munmap(0x7f275d800000, 138412032) = 0 [pid 5849] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5849] close(3) = 0 [pid 5849] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5849] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5849] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5849] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5849] exit_group(0) = ? [pid 5849] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5849, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5850 attached , child_tidptr=0x5555897f2650) = 5850 [ 74.256957][ T5849] overlayfs: workdir and upperdir must reside under the same mount [pid 5850] set_robust_list(0x5555897f2660, 24) = 0 [pid 5850] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5850] setpgid(0, 0) = 0 [pid 5850] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5850] write(3, "1000", 4) = 4 [pid 5850] close(3) = 0 [pid 5850] write(1, "executing program\n", 18) = 18 executing program [pid 5850] memfd_create("syzkaller", 0) = 3 [pid 5850] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5850] 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 [pid 5850] munmap(0x7f275d800000, 138412032) = 0 [pid 5850] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5850] close(3) = 0 [pid 5850] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5850] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5850] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5850] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5850] exit_group(0) = ? [pid 5850] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5850, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5851 attached , child_tidptr=0x5555897f2650) = 5851 [ 74.486188][ T5850] overlayfs: workdir and upperdir must reside under the same mount [pid 5851] set_robust_list(0x5555897f2660, 24) = 0 [pid 5851] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5851] setpgid(0, 0) = 0 [pid 5851] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5851] write(3, "1000", 4) = 4 [pid 5851] close(3) = 0 [pid 5851] write(1, "executing program\n", 18executing program ) = 18 [pid 5851] memfd_create("syzkaller", 0) = 3 [pid 5851] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5851] 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 [pid 5851] munmap(0x7f275d800000, 138412032) = 0 [pid 5851] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5851] close(3) = 0 [pid 5851] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5851] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5851] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5851] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5851] exit_group(0) = ? [pid 5851] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5851, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5852 attached , child_tidptr=0x5555897f2650) = 5852 [pid 5852] set_robust_list(0x5555897f2660, 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] memfd_create("syzkaller", 0) = 3 [pid 5852] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [ 74.737183][ T5851] overlayfs: workdir and upperdir must reside under the same mount [pid 5852] 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 [pid 5852] munmap(0x7f275d800000, 138412032) = 0 [pid 5852] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5852] close(3) = 0 [pid 5852] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5852] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5852] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5852] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5852] exit_group(0) = ? [pid 5852] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5852, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555897f2650) = 5853 ./strace-static-x86_64: Process 5853 attached [ 74.938751][ T5852] overlayfs: workdir and upperdir must reside under the same mount [pid 5853] set_robust_list(0x5555897f2660, 24) = 0 [pid 5853] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5853] setpgid(0, 0) = 0 [pid 5853] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5853] write(3, "1000", 4) = 4 [pid 5853] close(3) = 0 [pid 5853] write(1, "executing program\n", 18executing program ) = 18 [pid 5853] memfd_create("syzkaller", 0) = 3 [pid 5853] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5853] 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 [pid 5853] munmap(0x7f275d800000, 138412032) = 0 [pid 5853] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5853] close(3) = 0 [pid 5853] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5853] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5853] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5853] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5853] exit_group(0) = ? [pid 5853] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5853, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5854 attached , child_tidptr=0x5555897f2650) = 5854 [pid 5854] set_robust_list(0x5555897f2660, 24) = 0 [pid 5854] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5854] setpgid(0, 0) = 0 [ 75.169828][ T5853] overlayfs: workdir and upperdir must reside under the same mount [pid 5854] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5854] write(3, "1000", 4) = 4 [pid 5854] close(3) = 0 executing program [pid 5854] write(1, "executing program\n", 18) = 18 [pid 5854] memfd_create("syzkaller", 0) = 3 [pid 5854] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5854] 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 [pid 5854] munmap(0x7f275d800000, 138412032) = 0 [pid 5854] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5854] close(3) = 0 [pid 5854] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5854] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5854] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5854] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5854] exit_group(0) = ? [pid 5854] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5854, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5855 attached , child_tidptr=0x5555897f2650) = 5855 [pid 5855] set_robust_list(0x5555897f2660, 24) = 0 [pid 5855] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5855] setpgid(0, 0) = 0 [pid 5855] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5855] write(3, "1000", 4) = 4 [ 75.412301][ T5854] overlayfs: workdir and upperdir must reside under the same mount [pid 5855] close(3) = 0 [pid 5855] write(1, "executing program\n", 18executing program ) = 18 [pid 5855] memfd_create("syzkaller", 0) = 3 [pid 5855] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5855] 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 [pid 5855] munmap(0x7f275d800000, 138412032) = 0 [pid 5855] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5855] close(3) = 0 [pid 5855] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5855] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5855] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5855] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5855] exit_group(0) = ? [pid 5855] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5855, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5856 attached , child_tidptr=0x5555897f2650) = 5856 [ 75.674116][ T5855] overlayfs: workdir and upperdir must reside under the same mount [pid 5856] set_robust_list(0x5555897f2660, 24) = 0 [pid 5856] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5856] setpgid(0, 0) = 0 [pid 5856] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5856] write(3, "1000", 4) = 4 [pid 5856] close(3) = 0 [pid 5856] write(1, "executing program\n", 18executing program ) = 18 [pid 5856] memfd_create("syzkaller", 0) = 3 [pid 5856] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5856] 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 [pid 5856] munmap(0x7f275d800000, 138412032) = 0 [pid 5856] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5856] close(3) = 0 [pid 5856] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5856] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5856] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5856] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5856] exit_group(0) = ? [pid 5856] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5856, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5857 attached , child_tidptr=0x5555897f2650) = 5857 [pid 5857] set_robust_list(0x5555897f2660, 24) = 0 [pid 5857] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 75.955557][ T5856] overlayfs: workdir and upperdir must reside under the same mount [pid 5857] setpgid(0, 0) = 0 [pid 5857] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5857] write(3, "1000", 4) = 4 [pid 5857] close(3) = 0 [pid 5857] write(1, "executing program\n", 18executing program ) = 18 [pid 5857] memfd_create("syzkaller", 0) = 3 [pid 5857] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5857] 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 [pid 5857] munmap(0x7f275d800000, 138412032) = 0 [pid 5857] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5857] close(3) = 0 [pid 5857] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5857] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5857] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5857] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5857] exit_group(0) = ? [pid 5857] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5857, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5858 attached , child_tidptr=0x5555897f2650) = 5858 [ 76.236888][ T5857] overlayfs: workdir and upperdir must reside under the same mount [pid 5858] set_robust_list(0x5555897f2660, 24) = 0 [pid 5858] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5858] setpgid(0, 0) = 0 [pid 5858] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5858] write(3, "1000", 4) = 4 [pid 5858] close(3) = 0 [pid 5858] write(1, "executing program\n", 18executing program ) = 18 [pid 5858] memfd_create("syzkaller", 0) = 3 [pid 5858] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5858] 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 [pid 5858] munmap(0x7f275d800000, 138412032) = 0 [pid 5858] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5858] close(3) = 0 [pid 5858] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5858] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5858] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5858] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5858] exit_group(0) = ? [pid 5858] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5858, si_uid=0, si_status=0, si_utime=0, si_stime=14 /* 0.14 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5860 attached , child_tidptr=0x5555897f2650) = 5860 [ 76.488436][ T5858] overlayfs: workdir and upperdir must reside under the same mount [pid 5860] set_robust_list(0x5555897f2660, 24) = 0 [pid 5860] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5860] setpgid(0, 0) = 0 [pid 5860] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5860] write(3, "1000", 4) = 4 [pid 5860] close(3) = 0 [pid 5860] write(1, "executing program\n", 18executing program ) = 18 [pid 5860] memfd_create("syzkaller", 0) = 3 [pid 5860] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5860] 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 [pid 5860] munmap(0x7f275d800000, 138412032) = 0 [pid 5860] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5860] close(3) = 0 [pid 5860] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5860] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5860] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5860] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5860] exit_group(0) = ? [pid 5860] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5860, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=11 /* 0.11 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5865 attached , child_tidptr=0x5555897f2650) = 5865 [ 76.797271][ T5860] overlayfs: workdir and upperdir must reside under the same mount [pid 5865] set_robust_list(0x5555897f2660, 24) = 0 [pid 5865] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5865] setpgid(0, 0) = 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 executing program [pid 5865] write(1, "executing program\n", 18) = 18 [pid 5865] memfd_create("syzkaller", 0) = 3 [pid 5865] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5865] 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 [pid 5865] munmap(0x7f275d800000, 138412032) = 0 [pid 5865] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5865] close(3) = 0 [pid 5865] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5865] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5865] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5865] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5865] exit_group(0) = ? [pid 5865] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5865, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5867 attached , child_tidptr=0x5555897f2650) = 5867 [pid 5867] set_robust_list(0x5555897f2660, 24) = 0 [ 77.104338][ T5865] overlayfs: workdir and upperdir must reside under the same mount [pid 5867] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5867] setpgid(0, 0) = 0 [pid 5867] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5867] write(3, "1000", 4) = 4 [pid 5867] close(3) = 0 [pid 5867] write(1, "executing program\n", 18executing program ) = 18 [pid 5867] memfd_create("syzkaller", 0) = 3 [pid 5867] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5867] 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 [pid 5867] munmap(0x7f275d800000, 138412032) = 0 [pid 5867] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5867] close(3) = 0 [pid 5867] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5867] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5867] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5867] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5867] exit_group(0) = ? [pid 5867] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5867, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5868 attached , child_tidptr=0x5555897f2650) = 5868 [ 77.397850][ T5867] overlayfs: workdir and upperdir must reside under the same mount [pid 5868] set_robust_list(0x5555897f2660, 24) = 0 [pid 5868] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5868] setpgid(0, 0) = 0 [pid 5868] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5868] write(3, "1000", 4) = 4 [pid 5868] close(3) = 0 [pid 5868] write(1, "executing program\n", 18executing program ) = 18 [pid 5868] memfd_create("syzkaller", 0) = 3 [pid 5868] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5868] 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 [pid 5868] munmap(0x7f275d800000, 138412032) = 0 [pid 5868] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5868] close(3) = 0 [pid 5868] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5868] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5868] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5868] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5868] exit_group(0) = ? [pid 5868] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5868, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555897f2650) = 5869 ./strace-static-x86_64: Process 5869 attached [ 77.699917][ T5868] overlayfs: workdir and upperdir must reside under the same mount [pid 5869] set_robust_list(0x5555897f2660, 24) = 0 [pid 5869] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5869] setpgid(0, 0) = 0 [pid 5869] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5869] write(3, "1000", 4) = 4 [pid 5869] close(3) = 0 executing program [pid 5869] write(1, "executing program\n", 18) = 18 [pid 5869] memfd_create("syzkaller", 0) = 3 [pid 5869] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5869] 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 [pid 5869] munmap(0x7f275d800000, 138412032) = 0 [pid 5869] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5869] close(3) = 0 [pid 5869] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5869] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5869] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5869] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5869] exit_group(0) = ? [pid 5869] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5869, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5870 attached [pid 5870] set_robust_list(0x5555897f2660, 24 [pid 5837] <... clone resumed>, child_tidptr=0x5555897f2650) = 5870 [pid 5870] <... set_robust_list resumed>) = 0 [ 77.971873][ T5869] overlayfs: workdir and upperdir must reside under the same mount [pid 5870] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5870] setpgid(0, 0) = 0 [pid 5870] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5870] write(3, "1000", 4) = 4 [pid 5870] close(3) = 0 executing program [pid 5870] write(1, "executing program\n", 18) = 18 [pid 5870] memfd_create("syzkaller", 0) = 3 [pid 5870] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5870] 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 [pid 5870] munmap(0x7f275d800000, 138412032) = 0 [pid 5870] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5870] close(3) = 0 [pid 5870] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5870] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5870] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5870] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5870] exit_group(0) = ? [pid 5870] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5870, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=10 /* 0.10 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5871 attached , child_tidptr=0x5555897f2650) = 5871 [pid 5871] set_robust_list(0x5555897f2660, 24) = 0 [pid 5871] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 78.231723][ T5870] overlayfs: workdir and upperdir must reside under the same mount [pid 5871] setpgid(0, 0) = 0 [pid 5871] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5871] write(3, "1000", 4) = 4 [pid 5871] close(3) = 0 executing program [pid 5871] write(1, "executing program\n", 18) = 18 [pid 5871] memfd_create("syzkaller", 0) = 3 [pid 5871] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5871] 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 [pid 5871] munmap(0x7f275d800000, 138412032) = 0 [pid 5871] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5871] close(3) = 0 [pid 5871] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5871] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5871] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5871] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5871] exit_group(0) = ? [pid 5871] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5871, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5872 attached , child_tidptr=0x5555897f2650) = 5872 [pid 5872] set_robust_list(0x5555897f2660, 24) = 0 [ 78.470225][ T5871] overlayfs: workdir and upperdir must reside under the same mount [pid 5872] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5872] setpgid(0, 0) = 0 [pid 5872] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5872] write(3, "1000", 4) = 4 [pid 5872] close(3) = 0 [pid 5872] write(1, "executing program\n", 18executing program ) = 18 [pid 5872] memfd_create("syzkaller", 0) = 3 [pid 5872] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5872] 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 [pid 5872] munmap(0x7f275d800000, 138412032) = 0 [pid 5872] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5872] close(3) = 0 [pid 5872] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5872] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5872] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5872] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5872] exit_group(0) = ? [pid 5872] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5872, si_uid=0, si_status=0, si_utime=0, si_stime=11 /* 0.11 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 78.737335][ T5872] overlayfs: workdir and upperdir must reside under the same mount clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5873 attached , child_tidptr=0x5555897f2650) = 5873 [pid 5873] set_robust_list(0x5555897f2660, 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 [pid 5873] write(3, "1000", 4) = 4 [pid 5873] close(3) = 0 executing program [pid 5873] write(1, "executing program\n", 18) = 18 [pid 5873] memfd_create("syzkaller", 0) = 3 [pid 5873] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5873] 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 [pid 5873] munmap(0x7f275d800000, 138412032) = 0 [pid 5873] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5873] close(3) = 0 [pid 5873] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5873] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5873] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5873] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5873] exit_group(0) = ? [pid 5873] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5873, si_uid=0, si_status=0, si_utime=0, si_stime=10 /* 0.10 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5874 attached , child_tidptr=0x5555897f2650) = 5874 [pid 5874] set_robust_list(0x5555897f2660, 24) = 0 [pid 5874] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5874] setpgid(0, 0) = 0 [pid 5874] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5874] write(3, "1000", 4) = 4 [pid 5874] close(3) = 0 executing program [pid 5874] write(1, "executing program\n", 18) = 18 [pid 5874] memfd_create("syzkaller", 0) = 3 [pid 5874] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [ 78.977931][ T5873] overlayfs: workdir and upperdir must reside under the same mount [pid 5874] 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 [pid 5874] munmap(0x7f275d800000, 138412032) = 0 [pid 5874] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5874] close(3) = 0 [pid 5874] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5874] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5874] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5874] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5874] exit_group(0) = ? [pid 5874] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5874, si_uid=0, si_status=0, si_utime=0, si_stime=11 /* 0.11 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5875 attached , child_tidptr=0x5555897f2650) = 5875 [ 79.181413][ T5874] overlayfs: workdir and upperdir must reside under the same mount [pid 5875] set_robust_list(0x5555897f2660, 24) = 0 [pid 5875] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5875] setpgid(0, 0) = 0 [pid 5875] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5875] write(3, "1000", 4) = 4 [pid 5875] close(3) = 0 [pid 5875] write(1, "executing program\n", 18executing program ) = 18 [pid 5875] memfd_create("syzkaller", 0) = 3 [pid 5875] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5875] 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 [pid 5875] munmap(0x7f275d800000, 138412032) = 0 [pid 5875] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5875] close(3) = 0 [pid 5875] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5875] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5875] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5875] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5875] exit_group(0) = ? [pid 5875] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5875, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=7 /* 0.07 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5876 attached , child_tidptr=0x5555897f2650) = 5876 [pid 5876] set_robust_list(0x5555897f2660, 24) = 0 [pid 5876] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 79.451682][ T5875] overlayfs: workdir and upperdir must reside under the same mount [pid 5876] setpgid(0, 0) = 0 [pid 5876] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5876] write(3, "1000", 4) = 4 [pid 5876] close(3) = 0 [pid 5876] write(1, "executing program\n", 18executing program ) = 18 [pid 5876] memfd_create("syzkaller", 0) = 3 [pid 5876] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5876] 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 [pid 5876] munmap(0x7f275d800000, 138412032) = 0 [pid 5876] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5876] close(3) = 0 [pid 5876] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5876] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5876] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5876] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5876] exit_group(0) = ? [pid 5876] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5876, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5877 attached [pid 5877] set_robust_list(0x5555897f2660, 24 [pid 5837] <... clone resumed>, child_tidptr=0x5555897f2650) = 5877 [pid 5877] <... set_robust_list resumed>) = 0 [pid 5877] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5877] setpgid(0, 0) = 0 [ 79.743367][ T5876] overlayfs: workdir and upperdir must reside under the same mount [pid 5877] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5877] write(3, "1000", 4) = 4 [pid 5877] close(3) = 0 [pid 5877] write(1, "executing program\n", 18executing program ) = 18 [pid 5877] memfd_create("syzkaller", 0) = 3 [pid 5877] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5877] 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 [pid 5877] munmap(0x7f275d800000, 138412032) = 0 [pid 5877] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5877] close(3) = 0 [pid 5877] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5877] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5877] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5877] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5877] exit_group(0) = ? [pid 5877] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5877, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5878 attached , child_tidptr=0x5555897f2650) = 5878 [ 79.994513][ T5877] overlayfs: workdir and upperdir must reside under the same mount [pid 5878] set_robust_list(0x5555897f2660, 24) = 0 [pid 5878] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5878] setpgid(0, 0) = 0 [pid 5878] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5878] write(3, "1000", 4) = 4 [pid 5878] close(3) = 0 [pid 5878] write(1, "executing program\n", 18executing program ) = 18 [pid 5878] memfd_create("syzkaller", 0) = 3 [pid 5878] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5878] 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 [pid 5878] munmap(0x7f275d800000, 138412032) = 0 [pid 5878] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5878] close(3) = 0 [pid 5878] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5878] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5878] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5878] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5878] exit_group(0) = ? [pid 5878] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5878, si_uid=0, si_status=0, si_utime=3 /* 0.03 s */, si_stime=8 /* 0.08 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5879 attached , child_tidptr=0x5555897f2650) = 5879 [pid 5879] set_robust_list(0x5555897f2660, 24) = 0 [pid 5879] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 80.264663][ T5878] overlayfs: workdir and upperdir must reside under the same mount [pid 5879] setpgid(0, 0) = 0 [pid 5879] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5879] write(3, "1000", 4) = 4 [pid 5879] close(3) = 0 [pid 5879] write(1, "executing program\n", 18executing program ) = 18 [pid 5879] memfd_create("syzkaller", 0) = 3 [pid 5879] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5879] 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 [pid 5879] munmap(0x7f275d800000, 138412032) = 0 [pid 5879] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5879] close(3) = 0 [pid 5879] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5879] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5879] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5879] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5879] exit_group(0) = ? [pid 5879] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5879, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=9 /* 0.09 s */} --- restart_syscall(<... resuming interrupted clone ...>) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5880 attached , child_tidptr=0x5555897f2650) = 5880 [pid 5880] set_robust_list(0x5555897f2660, 24) = 0 [ 80.508166][ T5879] overlayfs: workdir and upperdir must reside under the same mount [pid 5880] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5880] setpgid(0, 0) = 0 [pid 5880] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5880] write(3, "1000", 4) = 4 [pid 5880] close(3) = 0 [pid 5880] write(1, "executing program\n", 18executing program ) = 18 [pid 5880] memfd_create("syzkaller", 0) = 3 [pid 5880] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5880] 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 [pid 5880] munmap(0x7f275d800000, 138412032) = 0 [pid 5880] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5880] close(3) = 0 [pid 5880] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5880] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5880] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5880] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5880] exit_group(0) = ? [pid 5880] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5880, si_uid=0, si_status=0, si_utime=2 /* 0.02 s */, si_stime=7 /* 0.07 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5881 attached , child_tidptr=0x5555897f2650) = 5881 [pid 5881] set_robust_list(0x5555897f2660, 24) = 0 [pid 5881] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [ 80.779129][ T5880] overlayfs: workdir and upperdir must reside under the same mount [pid 5881] setpgid(0, 0) = 0 [pid 5881] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5881] write(3, "1000", 4) = 4 [pid 5881] close(3) = 0 executing program [pid 5881] write(1, "executing program\n", 18) = 18 [pid 5881] memfd_create("syzkaller", 0) = 3 [pid 5881] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f275d800000 [pid 5881] 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 [pid 5881] munmap(0x7f275d800000, 138412032) = 0 [pid 5881] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [pid 5881] close(3) = 0 [pid 5881] mkdir("./file0", 000) = -1 EEXIST (File exists) [pid 5881] mkdirat(AT_FDCWD, "./file1", 000) = -1 EEXIST (File exists) [pid 5881] mkdir("./bus", 000) = -1 EEXIST (File exists) [pid 5881] mount(NULL, "./bus", "overlay", MS_STRICTATIME, "upperdir=./file1,lowerdir=./file0,workdir=./bus,") = -1 EINVAL (Invalid argument) [pid 5881] exit_group(0) = ? [pid 5881] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5881, si_uid=0, si_status=0, si_utime=1 /* 0.01 s */, si_stime=8 /* 0.08 s */} --- openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5882 attached , child_tidptr=0x5555897f2650) = 5882 [ 81.061259][ T5881] overlayfs: workdir and upperdir must reside under the same mount [pid 5882] set_robust_list(0x5555897f2660, 24) = 0 [pid 5882] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5882] setpgid(0, 0) = 0 [pid 5882] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5882] write(3, "1000", 4) = 4 [pid 5882] close(3) = 0 [pid 5882] write(1, "executing program\n", 18executing program ) = 18