./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2023591620 <...> DUID 00:04:f8:b5:8a:47:ae:09:95:3a:43:2d:d7:42:86:31:94:89 forked to background, child pid 3188 [ 26.505496][ T3189] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.516506][ T3189] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller syzkaller login: [ 34.076567][ T3384] sshd (3384) used greatest stack depth: 16160 bytes left Warning: Permanently added '10.128.1.43' (ECDSA) to the list of known hosts. execve("./syz-executor2023591620", ["./syz-executor2023591620"], 0x7ffd5f00d540 /* 10 vars */) = 0 brk(NULL) = 0x555557453000 brk(0x555557453c40) = 0x555557453c40 arch_prctl(ARCH_SET_FS, 0x555557453300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2023591620", 4096) = 28 brk(0x555557474c40) = 0x555557474c40 brk(0x555557475000) = 0x555557475000 mprotect(0x7f2a7b37a000, 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 ftruncate(3, 4194320) = 0 pwrite64(3, "\xcf\x58", 2, 6) = 2 pwrite64(3, "\x8c\xb6\x37", 3, 36) = 3 pwrite64(3, "\x00\xf5\x00\x1d\xfd\x68\xdf\x5e\xc5\xcc\x2e\x7f\x55\x90\x6b\x1e\xe0\x95\x0e\xae\x3a\x56\x3d\xe9\x94\x71\x90\x8f\x2b\xa7\x71\xf2\x09\x3c\x51\xd0\x1d\xe6\xe7\x05\xae\x01\x00\x00\x00\xcd\x1a\xd0\x2b\x54\xa4\xe7\xfc\x8b", 54, 64) = 54 pwrite64(3, "\x00\x04\x00\x00\xec\x01\x00\x00\x13\x02\x00\x00\x12\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x61\x1c\xad\x49\xe1\x00\x00\x00\x1e\x00\x00\x00\x00\x00\x00\x00\x00\x10\xcc\x03\x10\x00\x01\x00\x52\x65\x49\x73\x45\x72\x33\x46\x73\x00\x00\x00\x02\x00\x00\x00\x02\x00\x01\x00\x02\x00\x01\x02\x00\x00\x00\x00\x01\x00\x00\x00\x12\x31\x2a\x23\x12\x12\x33\x12\x33\x12\x31\x12\x34\x13\x41\x24"..., 128, 65536) = 128 pwrite64(3, "\x00\xfe\xff\x00\x00\x00\x05\x00\x08\x00\x00\x08\xf9\xe8\xc3\xda\xd3\xb1\x94\x2a\x21\xb9\x00\x10\x08\x00\x03\x54\x00\x48\xb2\x56\x07\x82\x8b\x96\xe2\x7e\xa5\x80\x19\x56\x00\x00\x00\x00\x00\x00\x00\xf1\xff\xff\xff\x9e\x08", 55, 65728) = 55 pwrite64(3, "\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x12\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x61\x1c\xad\x49\xe1\x00\x00\x00\x1e\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", 64, 2170880) = 64 pwrite64(3, "\x01\x00\x02\x00\x5c\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x2c\x00\xd4\x0f\x01\x00\x01\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\xf4\x01\x00\x00\x02\x00\x30\x00\xa4\x0f\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", 96, 2174976) = 96 pwrite64(3, "\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\x28\x00\x04\x00\x02\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x20\x00\x04\x00\x2e\x2e\x00\x00\x00\x00\x00\x00\x2e\x00\xe2\xff\x00\x00\x00\x00\xed\x41\x00\x00\x03\x00\x00\x3a\xc1\x65\x5f\x3a\xc1\x65\x5f\x3a\xc1\x65\xea\xff\x68\x1d\xff\x7b\x5a\x40\x01\x4c\x8c\xf4\xe7\x12\xf4\xd5\x86\x26\x23\x83\x1c\x45\xf0\x3b\x61\x76\x25\x60\xc6\x84"..., 307, 2178976) = 307 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 mkdir("./file0", 0777) = 0 [ 43.426062][ T3609] loop0: detected capacity change from 0 to 8192 [ 43.437856][ T3609] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 43.451267][ T3609] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 43.460735][ T3609] REISERFS (device loop0): using ordered data mode [ 43.467394][ T3609] reiserfs: using flush barriers mount("/dev/loop0", "./file0", "reiserfs", MS_NOSUID|MS_NOEXEC|MS_NOATIME|MS_RELATIME, "") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 5 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 close(3) = 0 [ 43.473621][ T3609] 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 [ 43.490381][ T3609] REISERFS (device loop0): checking transaction log (loop0) [ 43.499524][ T3609] REISERFS (device loop0): Using rupasov hash to sort names [ 43.508079][ T3609] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. sync() = 0 [ 43.746843][ T3609] [ 43.749183][ T3609] ====================================================== [ 43.756177][ T3609] WARNING: possible circular locking dependency detected [ 43.763170][ T3609] 6.1.0-rc4-syzkaller-00372-gaf7a05689189 #0 Not tainted [ 43.770168][ T3609] ------------------------------------------------------ [ 43.777178][ T3609] syz-executor202/3609 is trying to acquire lock: [ 43.783570][ T3609] ffffc90003d410f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x340/0x1070 [ 43.793296][ T3609] [ 43.793296][ T3609] but task is already holding lock: [ 43.800638][ T3609] ffff88807b74e460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 [ 43.809848][ T3609] [ 43.809848][ T3609] which lock already depends on the new lock. [ 43.809848][ T3609] [ 43.820227][ T3609] [ 43.820227][ T3609] the existing dependency chain (in reverse order) is: [ 43.829215][ T3609] [ 43.829215][ T3609] -> #2 (sb_writers#9){.+.+}-{0:0}: [ 43.836588][ T3609] lock_acquire+0x182/0x3c0 [ 43.841694][ T3609] sb_start_write+0x4d/0x1a0 [ 43.846807][ T3609] mnt_want_write_file+0x5a/0x1f0 [ 43.852341][ T3609] reiserfs_ioctl+0x16e/0x340 [ 43.857536][ T3609] __se_sys_ioctl+0xfb/0x170 [ 43.862640][ T3609] do_syscall_64+0x3d/0xb0 [ 43.867578][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 43.873983][ T3609] [ 43.873983][ T3609] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 43.881183][ T3609] lock_acquire+0x182/0x3c0 [ 43.886285][ T3609] __mutex_lock_common+0x1bd/0x26e0 [ 43.891986][ T3609] mutex_lock_nested+0x17/0x20 [ 43.897343][ T3609] reiserfs_write_lock_nested+0x5b/0xd0 [ 43.903397][ T3609] do_journal_begin_r+0x34b/0x1070 [ 43.909017][ T3609] journal_begin+0x14b/0x350 [ 43.914111][ T3609] reiserfs_fill_super+0x172b/0x24a0 [ 43.919940][ T3609] mount_bdev+0x26c/0x3a0 [ 43.924774][ T3609] legacy_get_tree+0xea/0x180 [ 43.929960][ T3609] vfs_get_tree+0x88/0x270 [ 43.934883][ T3609] do_new_mount+0x289/0xad0 [ 43.939892][ T3609] __se_sys_mount+0x2d3/0x3c0 [ 43.945072][ T3609] do_syscall_64+0x3d/0xb0 [ 43.949997][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 43.956420][ T3609] [ 43.956420][ T3609] -> #0 (&journal->j_mutex){+.+.}-{3:3}: [ 43.964236][ T3609] validate_chain+0x1898/0x6ae0 [ 43.969605][ T3609] __lock_acquire+0x1292/0x1f60 [ 43.974975][ T3609] lock_acquire+0x182/0x3c0 [ 43.980003][ T3609] __mutex_lock_common+0x1bd/0x26e0 [ 43.985719][ T3609] mutex_lock_nested+0x17/0x20 [ 43.990998][ T3609] do_journal_begin_r+0x340/0x1070 [ 43.996708][ T3609] journal_begin+0x14b/0x350 [ 44.001814][ T3609] reiserfs_dirty_inode+0x108/0x230 [ 44.007527][ T3609] __mark_inode_dirty+0x1e7/0x600 [ 44.013154][ T3609] reiserfs_ioctl+0x293/0x340 [ 44.018344][ T3609] __se_sys_ioctl+0xfb/0x170 [ 44.023541][ T3609] do_syscall_64+0x3d/0xb0 [ 44.028473][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.034967][ T3609] [ 44.034967][ T3609] other info that might help us debug this: [ 44.034967][ T3609] [ 44.045187][ T3609] Chain exists of: [ 44.045187][ T3609] &journal->j_mutex --> &sbi->lock --> sb_writers#9 [ 44.045187][ T3609] [ 44.057689][ T3609] Possible unsafe locking scenario: [ 44.057689][ T3609] [ 44.065128][ T3609] CPU0 CPU1 [ 44.070481][ T3609] ---- ---- [ 44.075842][ T3609] lock(sb_writers#9); [ 44.079993][ T3609] lock(&sbi->lock); [ 44.086491][ T3609] lock(sb_writers#9); [ 44.093157][ T3609] lock(&journal->j_mutex); [ 44.097736][ T3609] [ 44.097736][ T3609] *** DEADLOCK *** [ 44.097736][ T3609] [ 44.105866][ T3609] 1 lock held by syz-executor202/3609: [ 44.111321][ T3609] #0: ffff88807b74e460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 [ 44.120972][ T3609] [ 44.120972][ T3609] stack backtrace: [ 44.127369][ T3609] CPU: 1 PID: 3609 Comm: syz-executor202 Not tainted 6.1.0-rc4-syzkaller-00372-gaf7a05689189 #0 [ 44.137777][ T3609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 44.147825][ T3609] Call Trace: [ 44.151091][ T3609] [ 44.154009][ T3609] dump_stack_lvl+0x1b1/0x28e [ 44.158689][ T3609] ? nf_tcp_handle_invalid+0x62e/0x62e [ 44.164137][ T3609] ? print_circular_bug+0x13e/0x1c0 [ 44.169324][ T3609] check_noncircular+0x2cc/0x390 [ 44.174250][ T3609] ? add_chain_block+0x850/0x850 [ 44.179173][ T3609] ? lockdep_lock+0x102/0x290 [ 44.183837][ T3609] ? _find_first_zero_bit+0xe8/0x110 [ 44.189106][ T3609] validate_chain+0x1898/0x6ae0 [ 44.193981][ T3609] ? reacquire_held_locks+0x650/0x650 [ 44.199337][ T3609] ? __kernel_text_address+0x9/0x40 [ 44.204516][ T3609] ? unwind_get_return_address+0x48/0x80 [ 44.210135][ T3609] ? arch_stack_walk+0x98/0xe0 [ 44.214886][ T3609] ? stack_trace_save+0x104/0x1e0 [ 44.219896][ T3609] ? stack_trace_snprint+0xf0/0xf0 [ 44.224993][ T3609] ? check_noncircular+0x1aa/0x390 [ 44.230093][ T3609] ? add_chain_block+0x850/0x850 [ 44.235022][ T3609] ? lockdep_unlock+0x144/0x2e0 [ 44.239856][ T3609] ? lockdep_lock+0x290/0x290 [ 44.244521][ T3609] ? add_lock_to_list+0x1c7/0x2d0 [ 44.249545][ T3609] ? validate_chain+0x1478/0x6ae0 [ 44.254569][ T3609] ? reacquire_held_locks+0x650/0x650 [ 44.259929][ T3609] ? lockdep_unlock+0x144/0x2e0 [ 44.264767][ T3609] ? lockdep_lock+0x290/0x290 [ 44.269431][ T3609] ? add_lock_to_list+0x1c7/0x2d0 [ 44.274444][ T3609] ? validate_chain+0x1478/0x6ae0 [ 44.279525][ T3609] ? reacquire_held_locks+0x650/0x650 [ 44.284898][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.289923][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.294948][ T3609] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.300572][ T3609] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.306632][ T3609] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.312268][ T3609] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.318247][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.323258][ T3609] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.328879][ T3609] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.334848][ T3609] ? rcu_lock_release+0x5/0x20 [ 44.339606][ T3609] ? read_lock_is_recursive+0x10/0x10 [ 44.344972][ T3609] ? rcu_lock_release+0x5/0x20 [ 44.349727][ T3609] ? __lock_acquire+0x1f60/0x1f60 [ 44.354750][ T3609] ? deref_stack_reg+0x17a/0x210 [ 44.359677][ T3609] ? preempt_count_add+0x8d/0x180 [ 44.364692][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.369789][ T3609] ? is_bpf_text_address+0x253/0x270 [ 44.375057][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.380087][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.385106][ T3609] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.390746][ T3609] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.396728][ T3609] ? rcu_lock_release+0x5/0x20 [ 44.401486][ T3609] ? read_lock_is_recursive+0x10/0x10 [ 44.406935][ T3609] ? rcu_lock_release+0x5/0x20 [ 44.411728][ T3609] ? __lock_acquire+0x1f60/0x1f60 [ 44.416758][ T3609] ? deref_stack_reg+0x17a/0x210 [ 44.421699][ T3609] ? stack_trace_save+0x1e0/0x1e0 [ 44.426716][ T3609] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.432338][ T3609] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.438314][ T3609] ? rcu_lock_release+0x5/0x20 [ 44.443074][ T3609] ? read_lock_is_recursive+0x10/0x10 [ 44.448445][ T3609] ? rcu_lock_release+0x5/0x20 [ 44.453201][ T3609] ? __lock_acquire+0x1f60/0x1f60 [ 44.458218][ T3609] ? deref_stack_reg+0x17a/0x210 [ 44.463146][ T3609] ? mark_lock+0x9a/0x350 [ 44.467464][ T3609] ? __lock_acquire+0x1292/0x1f60 [ 44.472481][ T3609] ? mark_lock+0x9a/0x350 [ 44.476802][ T3609] __lock_acquire+0x1292/0x1f60 [ 44.481646][ T3609] lock_acquire+0x182/0x3c0 [ 44.486140][ T3609] ? do_journal_begin_r+0x340/0x1070 [ 44.491442][ T3609] ? read_lock_is_recursive+0x10/0x10 [ 44.496805][ T3609] ? __might_sleep+0xc0/0xc0 [ 44.501385][ T3609] ? reiserfs_write_unlock_nested+0xd0/0x120 [ 44.507353][ T3609] ? __lock_acquire+0x1f60/0x1f60 [ 44.512366][ T3609] __mutex_lock_common+0x1bd/0x26e0 [ 44.517556][ T3609] ? do_journal_begin_r+0x340/0x1070 [ 44.522829][ T3609] ? __mutex_unlock_slowpath+0x222/0x770 [ 44.528446][ T3609] ? do_journal_begin_r+0x340/0x1070 [ 44.533718][ T3609] ? mutex_unlock+0x10/0x10 [ 44.538203][ T3609] ? mutex_lock_io_nested+0x60/0x60 [ 44.543390][ T3609] mutex_lock_nested+0x17/0x20 [ 44.548224][ T3609] do_journal_begin_r+0x340/0x1070 [ 44.553329][ T3609] ? journal_join_abort+0xe0/0xe0 [ 44.558342][ T3609] ? print_irqtrace_events+0x220/0x220 [ 44.563788][ T3609] ? ktime_get_coarse_real_ts64+0x45/0x140 [ 44.569582][ T3609] ? lockdep_hardirqs_on+0x8d/0x130 [ 44.574770][ T3609] journal_begin+0x14b/0x350 [ 44.579347][ T3609] reiserfs_dirty_inode+0x108/0x230 [ 44.584539][ T3609] ? reiserfs_free_inode+0x20/0x20 [ 44.589638][ T3609] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.595257][ T3609] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.601233][ T3609] ? current_time+0x1d7/0x300 [ 44.605907][ T3609] ? reiserfs_free_inode+0x20/0x20 [ 44.611018][ T3609] __mark_inode_dirty+0x1e7/0x600 [ 44.616032][ T3609] ? __might_fault+0xb2/0x110 [ 44.620696][ T3609] reiserfs_ioctl+0x293/0x340 [ 44.625361][ T3609] ? __se_sys_ioctl+0xf0/0x170 [ 44.630117][ T3609] ? reiserfs_unpack+0x390/0x390 [ 44.635041][ T3609] __se_sys_ioctl+0xfb/0x170 [ 44.639623][ T3609] do_syscall_64+0x3d/0xb0 [ 44.644051][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.649932][ T3609] RIP: 0033:0x7f2a7b30dff9 [ 44.654337][ T3609] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 [ 44.673929][ T3609] RSP: 002b:00007fff91f0de68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 44.682333][ T3609] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2a7b30dff9 [ 44.690293][ T3609] RDX: 0000000020000040 RSI: 0000000040087602 RDI: 0000000000000005 ioctl(5, FS_IOC_SETVERSION, 0x20000040) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 44.698248][ T3609] RBP: 00007f2