./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2277760225
<...>
DUID 00:04:d9:3a:76:1c:b4:63:be:bc:0b:c2:08:9c:83:36:98:31
forked to background, child pid 4661
[ 37.454022][ T4662] 8021q: adding VLAN 0 to HW filter on device bond0
[ 37.465427][ T4662] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK
syzkaller
Warning: Permanently added '10.128.10.43' (ECDSA) to the list of known hosts.
execve("./syz-executor2277760225", ["./syz-executor2277760225"], 0x7ffda875d400 /* 10 vars */) = 0
brk(NULL) = 0x555556fe5000
brk(0x555556fe5c40) = 0x555556fe5c40
arch_prctl(ARCH_SET_FS, 0x555556fe5300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor2277760225", 4096) = 28
brk(0x555557006c40) = 0x555557006c40
brk(0x555557007000) = 0x555557007000
mprotect(0x7ff88e7ff000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
memfd_create("syzkaller", 0) = 3
mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff886345000
write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4194304) = 4194304
munmap(0x7ff886345000, 4194304) = 0
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
syzkaller login: [ 64.782726][ T4996] memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4996 'syz-executor227'
ioctl(4, LOOP_SET_FD, 3) = 0
close(3) = 0
mkdir("./file0", 0777) = 0
[ 64.835891][ T4996] loop0: detected capacity change from 0 to 8192
[ 64.848207][ T4996] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025
[ 64.861352][ T4996] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal
[ 64.870797][ T4996] REISERFS (device loop0): using ordered data mode
[ 64.877438][ T4996] reiserfs: using flush barriers
[ 64.884020][ T4996] REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
[ 64.900448][ T4996] REISERFS (device loop0): checking transaction log (loop0)
mount("/dev/loop0", "./file0", "reiserfs", MS_SYNCHRONOUS|MS_DIRSYNC|MS_RELATIME|MS_STRICTATIME, "") = 0
openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
chdir("./file0") = 0
ioctl(4, LOOP_CLR_FD) = 0
close(4) = 0
[ 64.947989][ T4996] REISERFS (device loop0): Using r5 hash to sort names
[ 64.955879][ T4996] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
[ 64.978332][ T4996]
[ 64.980692][ T4996] ======================================================
[ 64.987721][ T4996] WARNING: possible circular locking dependency detected
[ 64.994749][ T4996] 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0 Not tainted
[ 65.001771][ T4996] ------------------------------------------------------
[ 65.008774][ T4996] syz-executor227/4996 is trying to acquire lock:
[ 65.015175][ T4996] ffff888075a30980 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}, at: open_xa_dir+0x136/0x610
[ 65.025023][ T4996]
[ 65.025023][ T4996] but task is already holding lock:
[ 65.032463][ T4996] ffff8880156d3090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0
[ 65.042035][ T4996]
[ 65.042035][ T4996] which lock already depends on the new lock.
[ 65.042035][ T4996]
[ 65.052430][ T4996]
[ 65.052430][ T4996] the existing dependency chain (in reverse order) is:
[ 65.061430][ T4996]
[ 65.061430][ T4996] -> #1 (&sbi->lock){+.+.}-{3:3}:
[ 65.068639][ T4996] lock_acquire+0x1e3/0x520
[ 65.073667][ T4996] __mutex_lock_common+0x1d8/0x2530
[ 65.079405][ T4996] mutex_lock_nested+0x1b/0x20
[ 65.084690][ T4996] reiserfs_write_lock+0x7a/0xd0
[ 65.090154][ T4996] reiserfs_mkdir+0x321/0x8f0
[ 65.095357][ T4996] open_xa_dir+0x2cd/0x610
[ 65.100330][ T4996] xattr_lookup+0x24/0x280
[ 65.105278][ T4996] reiserfs_xattr_set_handle+0xfc/0xdc0
[ 65.111352][ T4996] reiserfs_security_write+0x157/0x1d0
[ 65.117340][ T4996] reiserfs_new_inode+0x1631/0x1d40
[ 65.123062][ T4996] reiserfs_create+0x3e7/0x6e0
[ 65.128350][ T4996] path_openat+0x13df/0x3170
[ 65.133475][ T4996] do_filp_open+0x234/0x490
[ 65.138503][ T4996] do_sys_openat2+0x13f/0x500
[ 65.143708][ T4996] __x64_sys_open+0x225/0x270
[ 65.148908][ T4996] do_syscall_64+0x41/0xc0
[ 65.153846][ T4996] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 65.160265][ T4996]
[ 65.160265][ T4996] -> #0 (&type->i_mutex_dir_key#6/3){+.+.}-{3:3}:
[ 65.168880][ T4996] validate_chain+0x166b/0x58f0
[ 65.174260][ T4996] __lock_acquire+0x1316/0x2070
[ 65.179639][ T4996] lock_acquire+0x1e3/0x520
[ 65.184665][ T4996] down_write_nested+0x3d/0x50
[ 65.189955][ T4996] open_xa_dir+0x136/0x610
[ 65.194899][ T4996] xattr_lookup+0x24/0x280
[ 65.199837][ T4996] reiserfs_xattr_get+0xfd/0x570
[ 65.205300][ T4996] __vfs_getxattr+0x436/0x470
[ 65.210503][ T4996] smk_fetch+0xb1/0x140
[ 65.215185][ T4996] smack_d_instantiate+0x6d9/0xb40
[ 65.220828][ T4996] security_d_instantiate+0x9b/0xf0
[ 65.226553][ T4996] d_instantiate_new+0x65/0x120
[ 65.231925][ T4996] reiserfs_create+0x5cf/0x6e0
[ 65.237213][ T4996] path_openat+0x13df/0x3170
[ 65.242330][ T4996] do_filp_open+0x234/0x490
[ 65.247383][ T4996] do_sys_openat2+0x13f/0x500
[ 65.252586][ T4996] __x64_sys_open+0x225/0x270
[ 65.257790][ T4996] do_syscall_64+0x41/0xc0
[ 65.262726][ T4996] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 65.269159][ T4996]
[ 65.269159][ T4996] other info that might help us debug this:
[ 65.269159][ T4996]
[ 65.279399][ T4996] Possible unsafe locking scenario:
[ 65.279399][ T4996]
[ 65.286858][ T4996] CPU0 CPU1
[ 65.292227][ T4996] ---- ----
[ 65.297587][ T4996] lock(&sbi->lock);
[ 65.301574][ T4996] lock(&type->i_mutex_dir_key#6/3);
[ 65.309483][ T4996] lock(&sbi->lock);
[ 65.315988][ T4996] lock(&type->i_mutex_dir_key#6/3);
[ 65.321375][ T4996]
[ 65.321375][ T4996] *** DEADLOCK ***
[ 65.321375][ T4996]
[ 65.329523][ T4996] 3 locks held by syz-executor227/4996:
[ 65.335073][ T4996] #0: ffff88807c894460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90
[ 65.344227][ T4996] #1: ffff888075a302e0 (&type->i_mutex_dir_key#6){+.+.}-{3:3}, at: path_openat+0x7ba/0x3170
[ 65.354430][ T4996] #2: ffff8880156d3090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5f/0xd0
[ 65.364459][ T4996]
[ 65.364459][ T4996] stack backtrace:
[ 65.370344][ T4996] CPU: 1 PID: 4996 Comm: syz-executor227 Not tainted 6.4.0-rc7-syzkaller-00194-g8a28a0b6f1a1 #0
[ 65.380753][ T4996] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
[ 65.390817][ T4996] Call Trace:
[ 65.394102][ T4996] <TASK>
[ 65.397044][ T4996] dump_stack_lvl+0x1e7/0x2d0
[ 65.401728][ T4996] ? nf_tcp_handle_invalid+0x650/0x650
[ 65.407204][ T4996] ? print_circular_bug+0x12b/0x1a0
[ 65.412419][ T4996] check_noncircular+0x2fe/0x3b0
[ 65.417411][ T4996] ? read_lock_is_recursive+0x20/0x20
[ 65.422807][ T4996] ? add_chain_block+0x850/0x850
[ 65.427774][ T4996] ? lockdep_lock+0x123/0x2b0
[ 65.432468][ T4996] ? check_path+0x40/0x40
[ 65.436832][ T4996] ? noop_count+0x30/0x30
[ 65.441181][ T4996] ? _find_first_zero_bit+0xd4/0x100
[ 65.446482][ T4996] validate_chain+0x166b/0x58f0
[ 65.451386][ T4996] ? stack_trace_save+0x1c0/0x1c0
[ 65.456437][ T4996] ? reacquire_held_locks+0x660/0x660
[ 65.461829][ T4996] ? look_up_lock_class+0x77/0x140
[ 65.466952][ T4996] ? register_lock_class+0x104/0x990
[ 65.472335][ T4996] ? __lock_acquire+0x1316/0x2070
[ 65.477381][ T4996] ? is_dynamic_key+0x1f0/0x1f0
[ 65.482246][ T4996] ? mark_lock+0x9a/0x340
[ 65.486589][ T4996] __lock_acquire+0x1316/0x2070
[ 65.491451][ T4996] lock_acquire+0x1e3/0x520
[ 65.495958][ T4996] ? open_xa_dir+0x136/0x610
[ 65.500557][ T4996] ? read_lock_is_recursive+0x20/0x20
[ 65.505932][ T4996] ? lockdep_hardirqs_on+0x98/0x140
[ 65.511237][ T4996] ? __might_sleep+0xc0/0xc0
[ 65.515859][ T4996] ? _raw_spin_unlock_irqrestore+0xdd/0x140
[ 65.521769][ T4996] ? _raw_spin_unlock+0x40/0x40
[ 65.526631][ T4996] ? stack_trace_snprint+0xf0/0xf0
[ 65.531759][ T4996] down_write_nested+0x3d/0x50
[ 65.536537][ T4996] ? open_xa_dir+0x136/0x610
[ 65.541137][ T4996] open_xa_dir+0x136/0x610
[ 65.545562][ T4996] ? kasan_set_track+0x61/0x70
[ 65.550330][ T4996] ? kasan_set_track+0x4f/0x70
[ 65.555101][ T4996] ? security_d_instantiate+0x9b/0xf0
[ 65.560483][ T4996] ? listxattr_filler+0x500/0x500
[ 65.565506][ T4996] ? do_sys_openat2+0x13f/0x500
[ 65.570363][ T4996] ? __static_call_text_end+0x52188/0x52188
[ 65.576359][ T4996] xattr_lookup+0x24/0x280
[ 65.580819][ T4996] reiserfs_xattr_get+0xfd/0x570
[ 65.585794][ T4996] ? security_get+0x6d/0xc0
[ 65.590331][ T4996] ? security_list+0x80/0x80
[ 65.594930][ T4996] __vfs_getxattr+0x436/0x470
[ 65.599629][ T4996] smk_fetch+0xb1/0x140
[ 65.603802][ T4996] smack_d_instantiate+0x6d9/0xb40
[ 65.609107][ T4996] ? smack_sem_semop+0x230/0x230
[ 65.614069][ T4996] security_d_instantiate+0x9b/0xf0
[ 65.619295][ T4996] d_instantiate_new+0x65/0x120
[ 65.624157][ T4996] reiserfs_create+0x5cf/0x6e0
[ 65.628942][ T4996] ? reiserfs_lookup+0x580/0x580
[ 65.633892][ T4996] ? bpf_lsm_inode_create+0x9/0x10
[ 65.639004][ T4996] ? security_inode_create+0xb8/0x100
[ 65.644395][ T4996] ? reiserfs_lookup+0x580/0x580
[ 65.649370][ T4996] path_openat+0x13df/0x3170
[ 65.654007][ T4996] ? do_filp_open+0x490/0x490
[ 65.658711][ T4996] do_filp_open+0x234/0x490
[ 65.663221][ T4996] ? vfs_tmpfile+0x4a0/0x4a0
[ 65.667825][ T4996] ? _raw_spin_unlock+0x28/0x40
[ 65.672679][ T4996] ? alloc_fd+0x59c/0x640
[ 65.677022][ T4996] do_sys_openat2+0x13f/0x500
[ 65.681705][ T4996] ? print_irqtrace_events+0x220/0x220
[ 65.687174][ T4996] ? do_sys_open+0x230/0x230
[ 65.691770][ T4996] ? lockdep_hardirqs_on+0x98/0x140
[ 65.696976][ T4996] ? _raw_spin_unlock_irq+0x2e/0x50
[ 65.702178][ T4996] ? ptrace_notify+0x278/0x380
[ 65.706989][ T4996] __x64_sys_open+0x225/0x270
[ 65.711688][ T4996] ? do_sys_openat2+0x500/0x500
[ 65.716555][ T4996] ? syscall_enter_from_user_mode+0x32/0x230
[ 65.722542][ T4996] ? syscall_enter_from_user_mode+0x8c/0x230
[ 65.728530][ T4996] do_syscall_64+0x41/0xc0
[ 65.732953][ T4996] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 65.738855][ T4996] RIP: 0033:0x7ff88e791799
[ 65.743290][ T4996] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48
[ 65.762907][ T4996] RSP: 002b:00007ffe87f20688 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[ 65.771322][ T4996] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff88e791799
[ 65.779296][ T4996] RDX: 0000000000000000 RSI: 000000000008a142 RDI: 0000000020000000
[ 65.787276][ T4996] RBP: 00007ff88e751030 R08: 00000000000010e6 R09: 0000000000000000
open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_LARGEFILE|O_CLOEXEC|FASYNC, 000) = 4
exit_group(0) = ?
+++ exited with 0 +++
[ 65.795257][ T4996] R10: 00007ffe87f20550 R11: 0000000000000246 R12: 00007f