./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4063150311 <...> Warning: Permanently added '10.128.0.171' (ED25519) to the list of known hosts. execve("./syz-executor4063150311", ["./syz-executor4063150311"], 0x7ffd4b118d80 /* 10 vars */) = 0 brk(NULL) = 0x555577cb6000 brk(0x555577cb6d00) = 0x555577cb6d00 arch_prctl(ARCH_SET_FS, 0x555577cb6380) = 0 set_tid_address(0x555577cb6650) = 5825 set_robust_list(0x555577cb6660, 24) = 0 rseq(0x555577cb6ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4063150311", 4096) = 28 getrandom("\xc3\x28\xc4\x5c\x14\x65\x40\x1c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555577cb6d00 brk(0x555577cd7d00) = 0x555577cd7d00 brk(0x555577cd8000) = 0x555577cd8000 mprotect(0x7f0f9bd58000, 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 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) = 0x7f0f93800000 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(0x7f0f93800000, 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 syzkaller login: [ 74.864100][ T5825] loop0: detected capacity change from 0 to 32768 [ 74.898242][ T5825] ======================================================= [ 74.898242][ T5825] WARNING: The mand mount option has been deprecated and [ 74.898242][ T5825] and is ignored by this kernel. Remove the mand [ 74.898242][ T5825] option from the mount to silence this warning. [ 74.898242][ T5825] ======================================================= [ 74.949816][ T5825] JBD2: Ignoring recovery information on journal mount("/dev/loop0", "./file1", "ocfs2", MS_MANDLOCK|MS_DIRSYNC|MS_NODIRATIME, "acl,heartbeat=none,dir_resv_level=00000000000000000003,resv_level=00000000000000000006,coherency=ful"...) = 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) [ 74.978507][ T5825] ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. mkdirat(AT_FDCWD, "./file1", 000) = 0 mkdirat(AT_FDCWD, "./file0", 0162100) = 0 mkdir("./bus", 000) = 0 [ 75.073547][ T5825] overlayfs: upper fs does not support tmpfile. [ 75.081892][ T5825] overlayfs: upper fs does not support RENAME_WHITEOUT. [ 75.089403][ T5825] [ 75.091815][ T5825] ====================================================== [ 75.098832][ T5825] WARNING: possible circular locking dependency detected [ 75.105869][ T5825] 6.15.0-rc7-syzkaller #0 Not tainted [ 75.111214][ T5825] ------------------------------------------------------ [ 75.118208][ T5825] syz-executor406/5825 is trying to acquire lock: [ 75.124590][ T5825] ffff888074c5c2c0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}, at: ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 75.138070][ T5825] [ 75.138070][ T5825] but task is already holding lock: [ 75.145404][ T5825] ffff888074c06ab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 75.154865][ T5825] [ 75.154865][ T5825] which lock already depends on the new lock. [ 75.154865][ T5825] [ 75.165239][ T5825] [ 75.165239][ T5825] the existing dependency chain (in reverse order) is: [ 75.174223][ T5825] [ 75.174223][ T5825] -> #4 (&oi->ip_xattr_sem){+.+.}-{4:4}: [ 75.182013][ T5825] lock_acquire+0x120/0x360 [ 75.187023][ T5825] down_write+0x96/0x1f0 [ 75.191770][ T5825] ocfs2_xattr_set_handle+0x3b0/0x7a0 [ 75.197638][ T5825] ocfs2_init_security_set+0xbd/0xe0 [ 75.203415][ T5825] ocfs2_mknod+0x137f/0x2050 [ 75.208544][ T5825] ocfs2_mkdir+0x191/0x440 [ 75.213475][ T5825] vfs_mkdir+0x303/0x510 [ 75.218247][ T5825] do_mkdirat+0x247/0x590 [ 75.223087][ T5825] __x64_sys_mkdirat+0x87/0xa0 [ 75.228355][ T5825] do_syscall_64+0xf6/0x210 [ 75.233358][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.239755][ T5825] [ 75.239755][ T5825] -> #3 (jbd2_handle){.+.+}-{0:0}: [ 75.247037][ T5825] lock_acquire+0x120/0x360 [ 75.252059][ T5825] start_this_handle+0x1fa7/0x21c0 [ 75.257774][ T5825] jbd2__journal_start+0x2c1/0x5b0 [ 75.263392][ T5825] jbd2_journal_start+0x2a/0x40 [ 75.268755][ T5825] ocfs2_start_trans+0x376/0x6d0 [ 75.274210][ T5825] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 75.280603][ T5825] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 75.287436][ T5825] ocfs2_mknod+0xe08/0x2050 [ 75.292441][ T5825] ocfs2_mkdir+0x191/0x440 [ 75.297354][ T5825] vfs_mkdir+0x303/0x510 [ 75.302096][ T5825] do_mkdirat+0x247/0x590 [ 75.306926][ T5825] __x64_sys_mkdirat+0x87/0xa0 [ 75.312188][ T5825] do_syscall_64+0xf6/0x210 [ 75.317188][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.323574][ T5825] [ 75.323574][ T5825] -> #2 (&journal->j_trans_barrier){.+.+}-{4:4}: [ 75.332075][ T5825] lock_acquire+0x120/0x360 [ 75.337086][ T5825] down_read+0x46/0x2e0 [ 75.341741][ T5825] ocfs2_start_trans+0x36a/0x6d0 [ 75.347178][ T5825] ocfs2_reserve_suballoc_bits+0x711/0x4640 [ 75.353570][ T5825] ocfs2_reserve_new_metadata_blocks+0x403/0x940 [ 75.360393][ T5825] ocfs2_mknod+0xe08/0x2050 [ 75.365401][ T5825] ocfs2_mkdir+0x191/0x440 [ 75.370318][ T5825] vfs_mkdir+0x303/0x510 [ 75.375057][ T5825] do_mkdirat+0x247/0x590 [ 75.379891][ T5825] __x64_sys_mkdirat+0x87/0xa0 [ 75.385164][ T5825] do_syscall_64+0xf6/0x210 [ 75.390172][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.396580][ T5825] [ 75.396580][ T5825] -> #1 (sb_internal#2){.+.+}-{0:0}: [ 75.404046][ T5825] lock_acquire+0x120/0x360 [ 75.409065][ T5825] ocfs2_start_trans+0x26b/0x6d0 [ 75.414504][ T5825] ocfs2_mknod+0xe93/0x2050 [ 75.419514][ T5825] ocfs2_mkdir+0x191/0x440 [ 75.424435][ T5825] vfs_mkdir+0x303/0x510 [ 75.429174][ T5825] do_mkdirat+0x247/0x590 [ 75.434000][ T5825] __x64_sys_mkdirat+0x87/0xa0 [ 75.439259][ T5825] do_syscall_64+0xf6/0x210 [ 75.444261][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.450646][ T5825] [ 75.450646][ T5825] -> #0 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5){+.+.}-{4:4}: [ 75.461129][ T5825] validate_chain+0xb9b/0x2140 [ 75.466392][ T5825] __lock_acquire+0xaac/0xd20 [ 75.471566][ T5825] lock_acquire+0x120/0x360 [ 75.476572][ T5825] down_write+0x96/0x1f0 [ 75.481312][ T5825] ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 75.487961][ T5825] ocfs2_reserve_clusters_with_limit+0x1be/0xba0 [ 75.494783][ T5825] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 75.500932][ T5825] ocfs2_xattr_set+0xb70/0x11f0 [ 75.506274][ T5825] __vfs_setxattr+0x439/0x480 [ 75.511456][ T5825] __vfs_setxattr_noperm+0x12d/0x660 [ 75.517236][ T5825] vfs_setxattr+0x16b/0x2f0 [ 75.522251][ T5825] ovl_get_workdir+0xb86/0x1700 [ 75.527600][ T5825] ovl_fill_super+0x1386/0x35d0 [ 75.532946][ T5825] get_tree_nodev+0xbb/0x150 [ 75.538035][ T5825] vfs_get_tree+0x92/0x2b0 [ 75.542949][ T5825] do_new_mount+0x24a/0xa40 [ 75.547949][ T5825] __se_sys_mount+0x317/0x410 [ 75.553115][ T5825] do_syscall_64+0xf6/0x210 [ 75.558113][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.564498][ T5825] [ 75.564498][ T5825] other info that might help us debug this: [ 75.564498][ T5825] [ 75.574702][ T5825] Chain exists of: [ 75.574702][ T5825] &ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5 --> jbd2_handle --> &oi->ip_xattr_sem [ 75.574702][ T5825] [ 75.590398][ T5825] Possible unsafe locking scenario: [ 75.590398][ T5825] [ 75.597816][ T5825] CPU0 CPU1 [ 75.603158][ T5825] ---- ---- [ 75.608582][ T5825] lock(&oi->ip_xattr_sem); [ 75.613146][ T5825] lock(jbd2_handle); [ 75.619708][ T5825] lock(&oi->ip_xattr_sem); [ 75.626788][ T5825] lock(&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#5); [ 75.634051][ T5825] [ 75.634051][ T5825] *** DEADLOCK *** [ 75.634051][ T5825] [ 75.642173][ T5825] 4 locks held by syz-executor406/5825: [ 75.647687][ T5825] #0: ffff8880777580e0 (&type->s_umount_key#43/1){+.+.}-{4:4}, at: alloc_super+0x204/0x970 [ 75.657754][ T5825] #1: ffff888078db4420 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 [ 75.666858][ T5825] #2: ffff888074c06d80 (&sb->s_type->i_mutex_key#16){++++}-{4:4}, at: vfs_setxattr+0x144/0x2f0 [ 75.677265][ T5825] #3: ffff888074c06ab8 (&oi->ip_xattr_sem){+.+.}-{4:4}, at: ocfs2_xattr_set+0x40f/0x11f0 [ 75.687155][ T5825] [ 75.687155][ T5825] stack backtrace: [ 75.693046][ T5825] CPU: 0 UID: 0 PID: 5825 Comm: syz-executor406 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) [ 75.693069][ T5825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 75.693086][ T5825] Call Trace: [ 75.693092][ T5825] [ 75.693100][ T5825] dump_stack_lvl+0x189/0x250 [ 75.693116][ T5825] ? __pfx_dump_stack_lvl+0x10/0x10 [ 75.693128][ T5825] ? __pfx__printk+0x10/0x10 [ 75.693142][ T5825] ? print_lock_name+0xde/0x100 [ 75.693155][ T5825] print_circular_bug+0x2ee/0x310 [ 75.693164][ T5825] check_noncircular+0x134/0x160 [ 75.693174][ T5825] validate_chain+0xb9b/0x2140 [ 75.693188][ T5825] ? __mutex_unlock_slowpath+0x1cd/0x700 [ 75.693201][ T5825] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 75.693214][ T5825] __lock_acquire+0xaac/0xd20 [ 75.693226][ T5825] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 75.693240][ T5825] lock_acquire+0x120/0x360 [ 75.693250][ T5825] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 75.693263][ T5825] ? is_bpf_text_address+0x292/0x2b0 [ 75.693275][ T5825] ? is_bpf_text_address+0x26/0x2b0 [ 75.693288][ T5825] down_write+0x96/0x1f0 [ 75.693300][ T5825] ? ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 75.693312][ T5825] ? __pfx_down_write+0x10/0x10 [ 75.693323][ T5825] ? arch_stack_walk+0xfc/0x150 [ 75.693335][ T5825] ocfs2_reserve_local_alloc_bits+0x125/0x24e0 [ 75.693347][ T5825] ? stack_trace_save+0x9c/0xe0 [ 75.693356][ T5825] ? __pfx_stack_trace_save+0x10/0x10 [ 75.693365][ T5825] ? check_path+0x21/0x40 [ 75.693371][ T5825] ? check_noncircular+0xe0/0x160 [ 75.693380][ T5825] ? lockdep_unlock+0x89/0x120 [ 75.693389][ T5825] ? validate_chain+0x897/0x2140 [ 75.693402][ T5825] ? __pfx_ocfs2_reserve_local_alloc_bits+0x10/0x10 [ 75.693414][ T5825] ? do_new_mount+0x24a/0xa40 [ 75.693430][ T5825] ? __lock_acquire+0xaac/0xd20 [ 75.693445][ T5825] ? do_raw_spin_unlock+0x122/0x240 [ 75.693454][ T5825] ? _raw_spin_unlock+0x28/0x50 [ 75.693467][ T5825] ? ocfs2_alloc_should_use_local+0x152/0x310 [ 75.693478][ T5825] ? ocfs2_reserve_clusters_with_limit+0x16b/0xba0 [ 75.693488][ T5825] ocfs2_reserve_clusters_with_limit+0x1be/0xba0 [ 75.693498][ T5825] ? __pfx_ocfs2_reserve_clusters_with_limit+0x10/0x10 [ 75.693509][ T5825] ? __pfx_ocfs2_calc_xattr_set_need+0x10/0x10 [ 75.693521][ T5825] ? __lock_acquire+0xaac/0xd20 [ 75.693534][ T5825] ocfs2_init_xattr_set_ctxt+0x376/0x700 [ 75.693545][ T5825] ? __pfx_ocfs2_init_xattr_set_ctxt+0x10/0x10 [ 75.693556][ T5825] ? ocfs2_xattr_set+0xb36/0x11f0 [ 75.693566][ T5825] ? up_write+0x1c4/0x420 [ 75.693573][ T5825] ? ocfs2_xattr_set+0x334/0x11f0 [ 75.693583][ T5825] ocfs2_xattr_set+0xb70/0x11f0 [ 75.693596][ T5825] ? __pfx_ocfs2_xattr_set+0x10/0x10 [ 75.693607][ T5825] ? smack_log+0xef/0x3f0 [ 75.693621][ T5825] ? __pfx___console_unlock+0x10/0x10 [ 75.693630][ T5825] ? smk_access+0x14c/0x4e0 [ 75.693643][ T5825] ? smk_tskacc+0x2fc/0x370 [ 75.693656][ T5825] ? posix_xattr_acl+0x93/0xc0 [ 75.693668][ T5825] ? evm_protect_xattr+0x4d4/0xa90 [ 75.693680][ T5825] ? __pfx_evm_protect_xattr+0x10/0x10 [ 75.693690][ T5825] ? safesetid_security_capable+0xa9/0x1a0 [ 75.693700][ T5825] ? __pfx_ocfs2_xattr_trusted_set+0x10/0x10 [ 75.693710][ T5825] __vfs_setxattr+0x439/0x480 [ 75.693726][ T5825] __vfs_setxattr_noperm+0x12d/0x660 [ 75.693740][ T5825] vfs_setxattr+0x16b/0x2f0 [ 75.693754][ T5825] ? __pfx_vfs_setxattr+0x10/0x10 [ 75.693767][ T5825] ? up_write+0x1c4/0x420 [ 75.693776][ T5825] ovl_get_workdir+0xb86/0x1700 [ 75.693790][ T5825] ? __pfx_ovl_get_workdir+0x10/0x10 [ 75.693807][ T5825] ? do_raw_spin_unlock+0x122/0x240 [ 75.693816][ T5825] ? _raw_spin_unlock+0x28/0x50 [ 75.693825][ T5825] ? ovl_inuse_trylock+0xae/0xf0 [ 75.693836][ T5825] ovl_fill_super+0x1386/0x35d0 [ 75.693849][ T5825] ? rcu_is_watching+0x15/0xb0 [ 75.693864][ T5825] ? shrinker_register+0x124/0x230 [ 75.693877][ T5825] ? __pfx_ovl_fill_super+0x10/0x10 [ 75.693888][ T5825] ? __pfx___mutex_lock+0x10/0x10 [ 75.693899][ T5825] ? __pfx___mutex_unlock_slowpath+0x10/0x10 [ 75.693911][ T5825] ? __raw_spin_lock_init+0x45/0x100 [ 75.693922][ T5825] ? sget_fc+0x962/0xa40 [ 75.693933][ T5825] ? __pfx_set_anon_super_fc+0x10/0x10 [ 75.693944][ T5825] ? __pfx_ovl_fill_super+0x10/0x10 [ 75.693956][ T5825] get_tree_nodev+0xbb/0x150 [ 75.693967][ T5825] vfs_get_tree+0x92/0x2b0 [ 75.693980][ T5825] do_new_mount+0x24a/0xa40 [ 75.693994][ T5825] __se_sys_mount+0x317/0x410 [ 75.694003][ T5825] ? __pfx___se_sys_mount+0x10/0x10 [ 75.694011][ T5825] ? __x64_sys_mount+0x20/0xc0 [ 75.694019][ T5825] do_syscall_64+0xf6/0x210 [ 75.694031][ T5825] ? clear_bhb_loop+0x60/0xb0 [ 75.694040][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 75.694049][ T5825] RIP: 0033:0x7f0f9bce17b9 [ 75.694064][ T5825] 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 [ 75.694071][ T5825] RSP: 002b:00007fff8bc1c4a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 mount(NULL, "./bus", "overlay", 0, "upperdir=./file1,lowerdir=./file0,workdir=./bus,nfs_export=on,") = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 75.694081][ T5825] RAX: ffffffffffffffda RBX: 6e6f3d74726f7078 RCX