./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3742868522 <...> DUID 00:04:f8:b5:8a:47:ae:09:95:3a:43:2d:d7:42:86:31:94:89 forked to background, child pid 3186 [ 26.717828][ T3187] 8021q: adding VLAN 0 to HW filter on device bond0 [ 26.728743][ T3187] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.19' (ECDSA) to the list of known hosts. execve("./syz-executor3742868522", ["./syz-executor3742868522"], 0x7fff545c5490 /* 10 vars */) = 0 brk(NULL) = 0x5555560f0000 brk(0x5555560f0c40) = 0x5555560f0c40 arch_prctl(ARCH_SET_FS, 0x5555560f0300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3742868522", 4096) = 28 brk(0x555556111c40) = 0x555556111c40 brk(0x555556112000) = 0x555556112000 mprotect(0x7fdfec2ea000, 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, "\x8c\xb6\x37", 3, 1) = 3 pwrite64(3, "\x00\x84\x09", 3, 4) = 3 pwrite64(3, "\xcf\x58\xf9\xb6\xb0\x97\x28\x72\x18\xce\x56\xf2\x50\xb4\x26\xfd\x15\x34\xa8\x24\x13\x97\xcf\xab\x6d\x88\x16\xfa\x4b\xb4\x5c\x3f\x9f\xdd\xf8\x76\xb2\x69\xc1\xe8\x59\xce\xbe\x21\xb7\xd9\x24\x4b\x1f\xd8\xf4\x11\xc2\xe7\x5b\x40\x44\x0e\x6e\x93\x65\x6e\xcb\xb4\x9b\xee\xac\x1c\x75\x71\x47\x8c\xa3\xc9\x9e\xc9\x07\x4a\xeb\xad\xf4\x46\x2d\x55\x73\x8c\xec\xdf\x1a\xe2\x86\x2f\x84\x19\x26\xf1\x5b\x27\x70\x6d"..., 205, 7) = 205 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\x00\x00\x00\x00\x00\x05\x00\x08\x00\x00\x00\x01\x10\x00\x00\x03\x10\x00\x48\xb2\x56\x07\x81\x8b\x96\xe2\x7e\xa5\x80\x19\x56\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9e\x08", 45, 65728) = 45 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\xf4\x50\x98\x12\x2a\x16\x2b\x00\x17\x31\xda\x04\x98\x0e\x00\x00\x66\xd9\xca\x9b\x08\x8f\x7a\xfe\xe7\x42\xa2\xaa\xc9\x3d\x10\x58\x68\xc7\x2e\xdb"..., 185, 2170880) = 185 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\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf3\xff", 82, 2178976) = 82 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 mkdir("./file0", 0777) = 0 syzkaller login: [ 43.731449][ T3614] loop0: detected capacity change from 0 to 8192 [ 43.742602][ T3614] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 43.755689][ T3614] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 43.765419][ T3614] REISERFS (device loop0): using ordered data mode [ 43.771911][ T3614] 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 open(NULL, O_RDONLY) = -1 EFAULT (Bad address) mount(NULL, NULL, NULL, MS_NOSUID, NULL) = -1 EFAULT (Bad address) [ 43.778109][ T3614] 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 [ 43.794824][ T3614] REISERFS (device loop0): checking transaction log (loop0) [ 43.804641][ T3614] REISERFS (device loop0): Using rupasov hash to sort names [ 43.812712][ T3614] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 43.826851][ T3614] [ 43.829210][ T3614] ====================================================== [ 43.836231][ T3614] WARNING: possible circular locking dependency detected [ 43.843260][ T3614] 6.1.0-rc4-syzkaller-00020-gf67dd6ce0723 #0 Not tainted [ 43.850280][ T3614] ------------------------------------------------------ [ 43.857279][ T3614] syz-executor374/3614 is trying to acquire lock: [ 43.863669][ T3614] ffffc90003d910f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x340/0x1070 [ 43.873397][ T3614] [ 43.873397][ T3614] but task is already holding lock: [ 43.880739][ T3614] ffff888022f8e460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 [ 43.889931][ T3614] [ 43.889931][ T3614] which lock already depends on the new lock. [ 43.889931][ T3614] [ 43.900307][ T3614] [ 43.900307][ T3614] the existing dependency chain (in reverse order) is: [ 43.909301][ T3614] [ 43.909301][ T3614] -> #2 (sb_writers#9){.+.+}-{0:0}: [ 43.916659][ T3614] lock_acquire+0x182/0x3c0 [ 43.921666][ T3614] sb_start_write+0x4d/0x1a0 [ 43.926758][ T3614] mnt_want_write_file+0x5a/0x1f0 [ 43.932280][ T3614] reiserfs_ioctl+0x16e/0x340 [ 43.937457][ T3614] __se_sys_ioctl+0xfb/0x170 [ 43.942551][ T3614] do_syscall_64+0x3d/0xb0 [ 43.947475][ T3614] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 43.953868][ T3614] [ 43.953868][ T3614] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 43.961048][ T3614] lock_acquire+0x182/0x3c0 [ 43.966051][ T3614] __mutex_lock_common+0x1bd/0x26e0 [ 43.971749][ T3614] mutex_lock_nested+0x17/0x20 [ 43.977019][ T3614] reiserfs_write_lock_nested+0x5b/0xd0 [ 43.983066][ T3614] do_journal_begin_r+0x34b/0x1070 [ 43.988676][ T3614] journal_begin+0x14b/0x350 [ 43.993766][ T3614] reiserfs_fill_super+0x172b/0x24a0 [ 43.999553][ T3614] mount_bdev+0x26c/0x3a0 [ 44.004387][ T3614] legacy_get_tree+0xea/0x180 [ 44.009744][ T3614] vfs_get_tree+0x88/0x270 [ 44.014660][ T3614] do_new_mount+0x289/0xad0 [ 44.019665][ T3614] __se_sys_mount+0x2d3/0x3c0 [ 44.024846][ T3614] do_syscall_64+0x3d/0xb0 [ 44.029766][ T3614] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.036163][ T3614] [ 44.036163][ T3614] -> #0 (&journal->j_mutex){+.+.}-{3:3}: [ 44.043954][ T3614] validate_chain+0x1898/0x6ae0 [ 44.049313][ T3614] __lock_acquire+0x1292/0x1f60 [ 44.054672][ T3614] lock_acquire+0x182/0x3c0 [ 44.059681][ T3614] __mutex_lock_common+0x1bd/0x26e0 [ 44.065378][ T3614] mutex_lock_nested+0x17/0x20 [ 44.070639][ T3614] do_journal_begin_r+0x340/0x1070 [ 44.076276][ T3614] journal_begin+0x14b/0x350 [ 44.081370][ T3614] reiserfs_dirty_inode+0x108/0x230 [ 44.087070][ T3614] __mark_inode_dirty+0x1e7/0x600 [ 44.092597][ T3614] reiserfs_ioctl+0x293/0x340 [ 44.097774][ T3614] __se_sys_ioctl+0xfb/0x170 [ 44.102865][ T3614] do_syscall_64+0x3d/0xb0 [ 44.107782][ T3614] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.114177][ T3614] [ 44.114177][ T3614] other info that might help us debug this: [ 44.114177][ T3614] [ 44.124382][ T3614] Chain exists of: [ 44.124382][ T3614] &journal->j_mutex --> &sbi->lock --> sb_writers#9 [ 44.124382][ T3614] [ 44.136867][ T3614] Possible unsafe locking scenario: [ 44.136867][ T3614] [ 44.144291][ T3614] CPU0 CPU1 [ 44.149638][ T3614] ---- ---- [ 44.154984][ T3614] lock(sb_writers#9); [ 44.159123][ T3614] lock(&sbi->lock); [ 44.165603][ T3614] lock(sb_writers#9); [ 44.172256][ T3614] lock(&journal->j_mutex); [ 44.176823][ T3614] [ 44.176823][ T3614] *** DEADLOCK *** [ 44.176823][ T3614] [ 44.184942][ T3614] 1 lock held by syz-executor374/3614: [ 44.190380][ T3614] #0: ffff888022f8e460 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 [ 44.200015][ T3614] [ 44.200015][ T3614] stack backtrace: [ 44.205877][ T3614] CPU: 1 PID: 3614 Comm: syz-executor374 Not tainted 6.1.0-rc4-syzkaller-00020-gf67dd6ce0723 #0 [ 44.216261][ T3614] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 44.226306][ T3614] Call Trace: [ 44.229581][ T3614] [ 44.232496][ T3614] dump_stack_lvl+0x1b1/0x28e [ 44.237161][ T3614] ? nf_tcp_handle_invalid+0x62e/0x62e [ 44.242601][ T3614] ? print_circular_bug+0x13e/0x1c0 [ 44.247786][ T3614] check_noncircular+0x2cc/0x390 [ 44.252707][ T3614] ? add_chain_block+0x850/0x850 [ 44.257625][ T3614] ? lockdep_lock+0x102/0x290 [ 44.262286][ T3614] ? _find_first_zero_bit+0xe8/0x110 [ 44.267555][ T3614] validate_chain+0x1898/0x6ae0 [ 44.272392][ T3614] ? reacquire_held_locks+0x650/0x650 [ 44.277746][ T3614] ? __kernel_text_address+0x9/0x40 [ 44.282922][ T3614] ? unwind_get_return_address+0x48/0x80 [ 44.288541][ T3614] ? arch_stack_walk+0x98/0xe0 [ 44.293295][ T3614] ? stack_trace_save+0x104/0x1e0 [ 44.298302][ T3614] ? stack_trace_snprint+0xf0/0xf0 [ 44.303421][ T3614] ? check_noncircular+0x1aa/0x390 [ 44.308585][ T3614] ? add_chain_block+0x850/0x850 [ 44.313763][ T3614] ? lockdep_unlock+0x144/0x2e0 [ 44.318657][ T3614] ? lockdep_lock+0x290/0x290 [ 44.323419][ T3614] ? add_lock_to_list+0x1c7/0x2d0 [ 44.328443][ T3614] ? validate_chain+0x1478/0x6ae0 [ 44.333463][ T3614] ? reacquire_held_locks+0x650/0x650 [ 44.338907][ T3614] ? lockdep_unlock+0x144/0x2e0 [ 44.343739][ T3614] ? lockdep_lock+0x290/0x290 [ 44.348399][ T3614] ? add_lock_to_list+0x1c7/0x2d0 [ 44.353430][ T3614] ? validate_chain+0x1478/0x6ae0 [ 44.358437][ T3614] ? reacquire_held_locks+0x650/0x650 [ 44.363793][ T3614] ? reacquire_held_locks+0x650/0x650 [ 44.369144][ T3614] ? is_bpf_text_address+0x253/0x270 [ 44.374411][ T3614] ? stack_trace_save+0x1e0/0x1e0 [ 44.379427][ T3614] ? __kernel_text_address+0x9/0x40 [ 44.384625][ T3614] ? unwind_get_return_address+0x48/0x80 [ 44.390246][ T3614] ? arch_stack_walk+0x98/0xe0 [ 44.394993][ T3614] ? stack_trace_save+0x104/0x1e0 [ 44.399998][ T3614] ? stack_trace_snprint+0xf0/0xf0 [ 44.405088][ T3614] ? lockdep_unlock+0x144/0x2e0 [ 44.409922][ T3614] ? lockdep_lock+0x290/0x290 [ 44.414598][ T3614] ? stack_trace_save+0x1e0/0x1e0 [ 44.419601][ T3614] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.425213][ T3614] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.431174][ T3614] ? rcu_lock_release+0x5/0x20 [ 44.435920][ T3614] ? read_lock_is_recursive+0x10/0x10 [ 44.441271][ T3614] ? rcu_lock_release+0x5/0x20 [ 44.446014][ T3614] ? __lock_acquire+0x1f60/0x1f60 [ 44.451019][ T3614] ? deref_stack_reg+0x17a/0x210 [ 44.455936][ T3614] ? preempt_count_add+0x8d/0x180 [ 44.460943][ T3614] ? stack_trace_save+0x1e0/0x1e0 [ 44.465948][ T3614] ? is_bpf_text_address+0x253/0x270 [ 44.471259][ T3614] ? stack_trace_save+0x1e0/0x1e0 [ 44.476266][ T3614] ? stack_trace_save+0x1e0/0x1e0 [ 44.481271][ T3614] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.486894][ T3614] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.492853][ T3614] ? rcu_lock_release+0x5/0x20 [ 44.497609][ T3614] ? read_lock_is_recursive+0x10/0x10 [ 44.503307][ T3614] ? rcu_lock_release+0x5/0x20 [ 44.508136][ T3614] ? __lock_acquire+0x1f60/0x1f60 [ 44.513140][ T3614] ? deref_stack_reg+0x17a/0x210 [ 44.518061][ T3614] ? stack_trace_save+0x1e0/0x1e0 [ 44.523066][ T3614] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.528677][ T3614] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.534636][ T3614] ? rcu_lock_release+0x5/0x20 [ 44.539380][ T3614] ? read_lock_is_recursive+0x10/0x10 [ 44.544733][ T3614] ? rcu_lock_release+0x5/0x20 [ 44.549485][ T3614] ? __lock_acquire+0x1f60/0x1f60 [ 44.554486][ T3614] ? deref_stack_reg+0x17a/0x210 [ 44.559402][ T3614] ? mark_lock+0x9a/0x350 [ 44.563716][ T3614] ? __lock_acquire+0x1292/0x1f60 [ 44.568723][ T3614] ? mark_lock+0x9a/0x350 [ 44.573041][ T3614] __lock_acquire+0x1292/0x1f60 [ 44.577899][ T3614] lock_acquire+0x182/0x3c0 [ 44.582399][ T3614] ? do_journal_begin_r+0x340/0x1070 [ 44.587670][ T3614] ? read_lock_is_recursive+0x10/0x10 [ 44.593032][ T3614] ? __might_sleep+0xc0/0xc0 [ 44.597630][ T3614] ? reiserfs_write_unlock_nested+0xd0/0x120 [ 44.603594][ T3614] ? __lock_acquire+0x1f60/0x1f60 [ 44.608601][ T3614] __mutex_lock_common+0x1bd/0x26e0 [ 44.613776][ T3614] ? do_journal_begin_r+0x340/0x1070 [ 44.619039][ T3614] ? __mutex_unlock_slowpath+0x222/0x770 [ 44.624653][ T3614] ? do_journal_begin_r+0x340/0x1070 [ 44.629927][ T3614] ? mutex_unlock+0x10/0x10 [ 44.634407][ T3614] ? mutex_lock_io_nested+0x60/0x60 [ 44.639599][ T3614] mutex_lock_nested+0x17/0x20 [ 44.644354][ T3614] do_journal_begin_r+0x340/0x1070 [ 44.649497][ T3614] ? journal_join_abort+0xe0/0xe0 [ 44.654507][ T3614] ? print_irqtrace_events+0x220/0x220 [ 44.659948][ T3614] ? ktime_get_coarse_real_ts64+0x45/0x140 [ 44.665738][ T3614] ? lockdep_hardirqs_on+0x8d/0x130 [ 44.670917][ T3614] journal_begin+0x14b/0x350 [ 44.675491][ T3614] reiserfs_dirty_inode+0x108/0x230 [ 44.680672][ T3614] ? reiserfs_free_inode+0x20/0x20 [ 44.685763][ T3614] ? rcu_read_lock_sched_held+0x87/0x110 [ 44.691722][ T3614] ? __bpf_trace_rcu_stall_warning+0x10/0x10 [ 44.697683][ T3614] ? current_time+0x1d7/0x300 [ 44.702342][ T3614] ? reiserfs_free_inode+0x20/0x20 [ 44.707433][ T3614] __mark_inode_dirty+0x1e7/0x600 [ 44.712440][ T3614] ? __might_fault+0xb2/0x110 [ 44.717122][ T3614] reiserfs_ioctl+0x293/0x340 [ 44.721819][ T3614] ? __se_sys_ioctl+0xf0/0x170 [ 44.726566][ T3614] ? reiserfs_unpack+0x390/0x390 [ 44.731481][ T3614] __se_sys_ioctl+0xfb/0x170 [ 44.736052][ T3614] do_syscall_64+0x3d/0xb0 [ 44.740461][ T3614] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.746332][ T3614] RIP: 0033:0x7fdfec27e169 [ 44.750726][ T3614] 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 [ 44.770313][ T3614] RSP: 002b:00007ffcb9b8aa88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 ioctl(5, FS_IOC_SETVERSION, 0x20000080) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 44.778703][ T3614] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fdfec27e169