./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3397920555 <...> Warning: Permanently added '10.128.0.247' (ECDSA) to the list of known hosts. execve("./syz-executor3397920555", ["./syz-executor3397920555"], 0x7ffddef1fb10 /* 10 vars */) = 0 brk(NULL) = 0x555556553000 brk(0x555556553c40) = 0x555556553c40 arch_prctl(ARCH_SET_FS, 0x555556553300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3397920555", 4096) = 28 brk(0x555556574c40) = 0x555556574c40 brk(0x555556575000) = 0x555556575000 mprotect(0x7fb725011000, 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: [ 43.969070][ T3606] loop0: detected capacity change from 0 to 8192 [ 43.980452][ T3606] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 43.993571][ T3606] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 44.002856][ T3606] REISERFS (device loop0): using ordered data mode [ 44.009357][ T3606] 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 [ 44.015365][ T3606] 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 [ 44.031718][ T3606] REISERFS (device loop0): checking transaction log (loop0) [ 44.040882][ T3606] REISERFS (device loop0): Using rupasov hash to sort names [ 44.048730][ T3606] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 44.062367][ T3606] close(3) = 0 ioctl(-1, _IOC(_IOC_WRITE, 0x66, 0x8, 0x28), 0x20000080) = -1 EBADF (Bad file descriptor) [ 44.064803][ T3606] ====================================================== [ 44.071814][ T3606] WARNING: possible circular locking dependency detected [ 44.078864][ T3606] 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0 Not tainted [ 44.086103][ T3606] ------------------------------------------------------ [ 44.093200][ T3606] syz-executor339/3606 is trying to acquire lock: [ 44.100906][ T3606] ffffc90003c710f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x293/0x10e0 [ 44.110650][ T3606] [ 44.110650][ T3606] but task is already holding lock: [ 44.117988][ T3606] ffff888077556460 (sb_writers#9){.+.+}-{0:0}, at: reiserfs_ioctl+0x19e/0x320 [ 44.126839][ T3606] [ 44.126839][ T3606] which lock already depends on the new lock. [ 44.126839][ T3606] [ 44.137215][ T3606] [ 44.137215][ T3606] the existing dependency chain (in reverse order) is: [ 44.146202][ T3606] [ 44.146202][ T3606] -> #2 (sb_writers#9){.+.+}-{0:0}: [ 44.153570][ T3606] mnt_want_write_file+0x8e/0x590 [ 44.159095][ T3606] reiserfs_ioctl+0x19e/0x320 [ 44.164274][ T3606] __x64_sys_ioctl+0x193/0x200 [ 44.169540][ T3606] do_syscall_64+0x35/0xb0 [ 44.174476][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.180872][ T3606] [ 44.180872][ T3606] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 44.188053][ T3606] __mutex_lock+0x12f/0x1350 [ 44.193211][ T3606] reiserfs_write_lock_nested+0x65/0xe0 [ 44.199260][ T3606] do_journal_begin_r+0x29d/0x10e0 [ 44.204869][ T3606] journal_begin+0x162/0x400 [ 44.209960][ T3606] reiserfs_fill_super+0x1c2b/0x2e90 [ 44.215754][ T3606] mount_bdev+0x34d/0x410 [ 44.220582][ T3606] legacy_get_tree+0x105/0x220 [ 44.225844][ T3606] vfs_get_tree+0x89/0x2f0 [ 44.230777][ T3606] path_mount+0x1326/0x1e20 [ 44.235778][ T3606] __x64_sys_mount+0x27f/0x300 [ 44.241040][ T3606] do_syscall_64+0x35/0xb0 [ 44.246002][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.252586][ T3606] [ 44.252586][ T3606] -> #0 (&journal->j_mutex){+.+.}-{3:3}: [ 44.260377][ T3606] __lock_acquire+0x2a43/0x56d0 [ 44.265729][ T3606] lock_acquire+0x1df/0x630 [ 44.270731][ T3606] __mutex_lock+0x12f/0x1350 [ 44.275819][ T3606] do_journal_begin_r+0x293/0x10e0 [ 44.281431][ T3606] journal_begin+0x162/0x400 [ 44.286521][ T3606] reiserfs_dirty_inode+0xff/0x250 [ 44.292141][ T3606] __mark_inode_dirty+0x243/0x11d0 [ 44.297755][ T3606] reiserfs_ioctl+0x2c6/0x320 [ 44.302934][ T3606] __x64_sys_ioctl+0x193/0x200 [ 44.308200][ T3606] do_syscall_64+0x35/0xb0 [ 44.313122][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.319520][ T3606] [ 44.319520][ T3606] other info that might help us debug this: [ 44.319520][ T3606] [ 44.329724][ T3606] Chain exists of: [ 44.329724][ T3606] &journal->j_mutex --> &sbi->lock --> sb_writers#9 [ 44.329724][ T3606] [ 44.342213][ T3606] Possible unsafe locking scenario: [ 44.342213][ T3606] [ 44.349637][ T3606] CPU0 CPU1 [ 44.354978][ T3606] ---- ---- [ 44.360319][ T3606] lock(sb_writers#9); [ 44.364454][ T3606] lock(&sbi->lock); [ 44.370930][ T3606] lock(sb_writers#9); [ 44.377588][ T3606] lock(&journal->j_mutex); [ 44.382156][ T3606] [ 44.382156][ T3606] *** DEADLOCK *** [ 44.382156][ T3606] [ 44.390274][ T3606] 1 lock held by syz-executor339/3606: [ 44.395705][ T3606] #0: ffff888077556460 (sb_writers#9){.+.+}-{0:0}, at: reiserfs_ioctl+0x19e/0x320 [ 44.404994][ T3606] [ 44.404994][ T3606] stack backtrace: [ 44.410868][ T3606] CPU: 0 PID: 3606 Comm: syz-executor339 Not tainted 6.1.0-rc4-syzkaller-00362-gfef7fd48922d #0 [ 44.421258][ T3606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 44.431310][ T3606] Call Trace: [ 44.434576][ T3606] [ 44.437492][ T3606] dump_stack_lvl+0xcd/0x134 [ 44.442068][ T3606] check_noncircular+0x25f/0x2e0 [ 44.446986][ T3606] ? print_circular_bug+0x1e0/0x1e0 [ 44.452163][ T3606] ? lock_release+0x5cb/0x810 [ 44.456818][ T3606] ? is_bpf_text_address+0x77/0x170 [ 44.462001][ T3606] ? lock_downgrade+0x6e0/0x6e0 [ 44.466833][ T3606] __lock_acquire+0x2a43/0x56d0 [ 44.471665][ T3606] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 44.477643][ T3606] lock_acquire+0x1df/0x630 [ 44.482125][ T3606] ? do_journal_begin_r+0x293/0x10e0 [ 44.487388][ T3606] ? lock_release+0x810/0x810 [ 44.492051][ T3606] __mutex_lock+0x12f/0x1350 [ 44.496621][ T3606] ? do_journal_begin_r+0x293/0x10e0 [ 44.501893][ T3606] ? do_journal_begin_r+0x293/0x10e0 [ 44.507245][ T3606] ? mutex_lock_io_nested+0x1190/0x1190 [ 44.512775][ T3606] ? wait_for_completion_io_timeout+0x20/0x20 [ 44.518821][ T3606] ? lockdep_unlock+0x11b/0x290 [ 44.523650][ T3606] ? __lock_acquire+0x2567/0x56d0 [ 44.528676][ T3606] do_journal_begin_r+0x293/0x10e0 [ 44.533771][ T3606] ? do_journal_end+0x4af0/0x4af0 [ 44.538879][ T3606] ? find_held_lock+0x2d/0x110 [ 44.543623][ T3606] ? current_time+0x72/0x2c0 [ 44.548194][ T3606] journal_begin+0x162/0x400 [ 44.552767][ T3606] reiserfs_dirty_inode+0xff/0x250 [ 44.557861][ T3606] ? reiserfs_unfreeze+0xa0/0xa0 [ 44.562783][ T3606] ? ktime_get_coarse_real_ts64+0x1b7/0x200 [ 44.569014][ T3606] ? reiserfs_unfreeze+0xa0/0xa0 [ 44.573934][ T3606] __mark_inode_dirty+0x243/0x11d0 [ 44.579052][ T3606] reiserfs_ioctl+0x2c6/0x320 [ 44.583711][ T3606] ? reiserfs_fileattr_set+0x570/0x570 [ 44.589150][ T3606] __x64_sys_ioctl+0x193/0x200 [ 44.593898][ T3606] do_syscall_64+0x35/0xb0 [ 44.598314][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.604191][ T3606] RIP: 0033:0x7fb724fa51a9 [ 44.608600][ T3606] 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 [ 44.628187][ T3606] RSP: 002b:00007fff41c70428 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 44.636594][ T3606] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb724fa51a9 [ 44.644554][ T3606] RDX: 0000000020000080 RSI: 0000000040087602 RDI: 0000000000000005 [ 44.652522][ T3606] RBP: 00007fb724f649a0 R08: 0000000000000000 R09: 0000000000000000 [ 44.660474][ T3606] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb724f64a30 ioctl(5, FS_IOC_SETVERSION, 0x20000080) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 44.668510][ T3606] R13: 0000000000000000 R