./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor426333076 <...> Warning: Permanently added '10.128.0.8' (ECDSA) to the list of known hosts. execve("./syz-executor426333076", ["./syz-executor426333076"], 0x7ffd9b121d50 /* 10 vars */) = 0 brk(NULL) = 0x555556e1a000 brk(0x555556e1ac40) = 0x555556e1ac40 arch_prctl(ARCH_SET_FS, 0x555556e1a300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor426333076", 4096) = 27 brk(0x555556e3bc40) = 0x555556e3bc40 brk(0x555556e3c000) = 0x555556e3c000 mprotect(0x7f5162a46000, 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, 4194832) = 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: [ 43.466136][ T3606] loop0: detected capacity change from 0 to 8193 [ 43.478128][ T3606] REISERFS warning: read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025 [ 43.491771][ T3606] REISERFS (device loop0): found reiserfs format "3.6" with non-standard journal [ 43.501196][ T3606] REISERFS (device loop0): using ordered data mode [ 43.507897][ 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 close(3) = 0 [ 43.513811][ 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 [ 43.530727][ T3606] REISERFS (device loop0): checking transaction log (loop0) [ 43.539496][ T3606] REISERFS (device loop0): Using rupasov hash to sort names [ 43.547695][ T3606] REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. [ 43.562615][ T3606] [ 43.564957][ T3606] ====================================================== [ 43.572232][ T3606] WARNING: possible circular locking dependency detected [ 43.579247][ T3606] 6.1.0-rc4-syzkaller-00372-gaf7a05689189 #0 Not tainted [ 43.586330][ T3606] ------------------------------------------------------ [ 43.593342][ T3606] syz-executor426/3606 is trying to acquire lock: [ 43.599729][ T3606] ffffc90003db10f0 (&journal->j_mutex){+.+.}-{3:3}, at: do_journal_begin_r+0x293/0x10e0 [ 43.609537][ T3606] [ 43.609537][ T3606] but task is already holding lock: [ 43.616875][ T3606] ffff888023f20460 (sb_writers#9){.+.+}-{0:0}, at: reiserfs_ioctl+0x19e/0x320 [ 43.625724][ T3606] [ 43.625724][ T3606] which lock already depends on the new lock. [ 43.625724][ T3606] [ 43.636101][ T3606] [ 43.636101][ T3606] the existing dependency chain (in reverse order) is: [ 43.645091][ T3606] [ 43.645091][ T3606] -> #2 (sb_writers#9){.+.+}-{0:0}: [ 43.652539][ T3606] mnt_want_write_file+0x8e/0x590 [ 43.658063][ T3606] reiserfs_ioctl+0x19e/0x320 [ 43.663241][ T3606] __x64_sys_ioctl+0x193/0x200 [ 43.668504][ T3606] do_syscall_64+0x35/0xb0 [ 43.673441][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 43.679846][ T3606] [ 43.679846][ T3606] -> #1 (&sbi->lock){+.+.}-{3:3}: [ 43.687035][ T3606] __mutex_lock+0x12f/0x1350 [ 43.692150][ T3606] reiserfs_write_lock_nested+0x65/0xe0 [ 43.698201][ T3606] do_journal_begin_r+0x29d/0x10e0 [ 43.703814][ T3606] journal_begin+0x162/0x400 [ 43.708903][ T3606] reiserfs_fill_super+0x1c2b/0x2e90 [ 43.714690][ T3606] mount_bdev+0x34d/0x410 [ 43.719623][ T3606] legacy_get_tree+0x105/0x220 [ 43.724897][ T3606] vfs_get_tree+0x89/0x2f0 [ 43.729814][ T3606] path_mount+0x1326/0x1e20 [ 43.734824][ T3606] __x64_sys_mount+0x27f/0x300 [ 43.740090][ T3606] do_syscall_64+0x35/0xb0 [ 43.745011][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 43.751414][ T3606] [ 43.751414][ T3606] -> #0 (&journal->j_mutex){+.+.}-{3:3}: [ 43.759208][ T3606] __lock_acquire+0x2a43/0x56d0 [ 43.764564][ T3606] lock_acquire+0x1df/0x630 [ 43.769586][ T3606] __mutex_lock+0x12f/0x1350 [ 43.774684][ T3606] do_journal_begin_r+0x293/0x10e0 [ 43.780299][ T3606] journal_begin+0x162/0x400 [ 43.785386][ T3606] reiserfs_dirty_inode+0xff/0x250 [ 43.791001][ T3606] __mark_inode_dirty+0x243/0x11d0 [ 43.796614][ T3606] reiserfs_ioctl+0x2c6/0x320 [ 43.801863][ T3606] __x64_sys_ioctl+0x193/0x200 [ 43.807133][ T3606] do_syscall_64+0x35/0xb0 [ 43.812076][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 43.818562][ T3606] [ 43.818562][ T3606] other info that might help us debug this: [ 43.818562][ T3606] [ 43.828768][ T3606] Chain exists of: [ 43.828768][ T3606] &journal->j_mutex --> &sbi->lock --> sb_writers#9 [ 43.828768][ T3606] [ 43.841432][ T3606] Possible unsafe locking scenario: [ 43.841432][ T3606] [ 43.848856][ T3606] CPU0 CPU1 [ 43.854198][ T3606] ---- ---- [ 43.859542][ T3606] lock(sb_writers#9); [ 43.863688][ T3606] lock(&sbi->lock); [ 43.870168][ T3606] lock(sb_writers#9); [ 43.876839][ T3606] lock(&journal->j_mutex); [ 43.881404][ T3606] [ 43.881404][ T3606] *** DEADLOCK *** [ 43.881404][ T3606] [ 43.889521][ T3606] 1 lock held by syz-executor426/3606: [ 43.894985][ T3606] #0: ffff888023f20460 (sb_writers#9){.+.+}-{0:0}, at: reiserfs_ioctl+0x19e/0x320 [ 43.904298][ T3606] [ 43.904298][ T3606] stack backtrace: [ 43.910177][ T3606] CPU: 0 PID: 3606 Comm: syz-executor426 Not tainted 6.1.0-rc4-syzkaller-00372-gaf7a05689189 #0 [ 43.920565][ T3606] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 43.930601][ T3606] Call Trace: [ 43.933874][ T3606] [ 43.936783][ T3606] dump_stack_lvl+0xcd/0x134 [ 43.941362][ T3606] check_noncircular+0x25f/0x2e0 [ 43.946279][ T3606] ? print_circular_bug+0x1e0/0x1e0 [ 43.951629][ T3606] ? lock_release+0x5cb/0x810 [ 43.956286][ T3606] ? is_bpf_text_address+0x77/0x170 [ 43.961468][ T3606] ? lock_downgrade+0x6e0/0x6e0 [ 43.966298][ T3606] __lock_acquire+0x2a43/0x56d0 [ 43.971135][ T3606] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 43.977273][ T3606] lock_acquire+0x1df/0x630 [ 43.981773][ T3606] ? do_journal_begin_r+0x293/0x10e0 [ 43.987038][ T3606] ? lock_release+0x810/0x810 [ 43.991705][ T3606] __mutex_lock+0x12f/0x1350 [ 43.996365][ T3606] ? do_journal_begin_r+0x293/0x10e0 [ 44.001776][ T3606] ? do_journal_begin_r+0x293/0x10e0 [ 44.007136][ T3606] ? mutex_lock_io_nested+0x1190/0x1190 [ 44.012747][ T3606] ? wait_for_completion_io_timeout+0x20/0x20 [ 44.018797][ T3606] ? lockdep_unlock+0x11b/0x290 [ 44.023640][ T3606] ? __lock_acquire+0x2567/0x56d0 [ 44.028646][ T3606] do_journal_begin_r+0x293/0x10e0 [ 44.033743][ T3606] ? do_journal_end+0x4af0/0x4af0 [ 44.038837][ T3606] ? find_held_lock+0x2d/0x110 [ 44.044100][ T3606] ? current_time+0x72/0x2c0 [ 44.048672][ T3606] journal_begin+0x162/0x400 [ 44.053244][ T3606] reiserfs_dirty_inode+0xff/0x250 [ 44.058343][ T3606] ? reiserfs_unfreeze+0xa0/0xa0 [ 44.063264][ T3606] ? ktime_get_coarse_real_ts64+0x1b7/0x200 [ 44.069143][ T3606] ? reiserfs_unfreeze+0xa0/0xa0 [ 44.074064][ T3606] __mark_inode_dirty+0x243/0x11d0 [ 44.079159][ T3606] reiserfs_ioctl+0x2c6/0x320 [ 44.083839][ T3606] ? reiserfs_fileattr_set+0x570/0x570 [ 44.089367][ T3606] __x64_sys_ioctl+0x193/0x200 [ 44.094116][ T3606] do_syscall_64+0x35/0xb0 [ 44.098519][ T3606] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 44.104399][ T3606] RIP: 0033:0x7f51629da139 [ 44.108788][ 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 [ 44.128375][ T3606] RSP: 002b:00007ffed7cf0798 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 44.136765][ T3606] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f51629da139 [ 44.144713][ T3606] RDX: 0000000020000080 RSI: 0000000040087602 RDI: 0000000000000005 [ 44.152660][ T3606] RBP: 00007f5162999930 R08: 0000555556e1a2c0 R09: 0000000000000000 [ 44.160612][ T3606] R10: 00007ffed7cf0650 R11: 0000000000000246 R12: 00007f51629999c0 ioctl(5, FS_IOC_SETVERSION, 0x20000080) = 0 exit_group(0) = ? +++ exited with 0 +++ [ 44.16856