====================================================== WARNING: possible circular locking dependency detected 6.0.0-rc2-syzkaller-00044-gdf0219d11b6f #0 Not tainted ------------------------------------------------------ syz-executor.4/25756 is trying to acquire lock: ffff88807f1d2650 (sb_internal){.+.+}-{0:0}, at: evict+0x2ed/0x6b0 fs/inode.c:665 but task is already holding lock: ffff88802e70a218 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] ffff88802e70a218 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xd1/0x110 fs/inode.c:1124 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}: down_write_nested+0x94/0x150 kernel/locking/rwsem.c:1662 inode_lock_nested include/linux/fs.h:791 [inline] lock_two_nondirectories+0xd1/0x110 fs/inode.c:1124 swap_inode_boot_loader fs/ext4/ioctl.c:385 [inline] __ext4_ioctl+0x1388/0x4ab0 fs/ext4/ioctl.c:1416 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #2 (&sb->s_type->i_mutex_key#8){++++}-{3:3}: down_read+0x98/0x450 kernel/locking/rwsem.c:1499 inode_lock_shared include/linux/fs.h:766 [inline] ext4_bmap+0x4e/0x460 fs/ext4/inode.c:3157 bmap+0xaa/0x120 fs/inode.c:1799 jbd2_journal_bmap+0xa8/0x180 fs/jbd2/journal.c:971 __jbd2_journal_erase fs/jbd2/journal.c:1784 [inline] jbd2_journal_flush+0x84f/0xc00 fs/jbd2/journal.c:2490 ext4_ioctl_checkpoint fs/ext4/ioctl.c:1082 [inline] __ext4_ioctl+0x28fd/0x4ab0 fs/ext4/ioctl.c:1586 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:603 [inline] mutex_lock_io_nested+0x13f/0x1190 kernel/locking/mutex.c:833 __jbd2_log_wait_for_space+0x234/0x460 fs/jbd2/checkpoint.c:110 add_transaction_credits+0xa2d/0xb70 fs/jbd2/transaction.c:298 start_this_handle+0x3ae/0x14a0 fs/jbd2/transaction.c:422 jbd2__journal_start+0x38c/0x910 fs/jbd2/transaction.c:520 __ext4_journal_start_sb+0x3a3/0x490 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_evict_inode+0x990/0x1d40 fs/ext4/inode.c:251 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput.part.0+0x55d/0x810 fs/inode.c:1774 iput+0x58/0x70 fs/inode.c:1764 do_unlinkat+0x41b/0x650 fs/namei.c:4304 __do_sys_unlink fs/namei.c:4345 [inline] __se_sys_unlink fs/namei.c:4343 [inline] __x64_sys_unlink+0xc6/0x110 fs/namei.c:4343 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd -> #0 (sb_internal){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3829 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5053 lock_acquire kernel/locking/lockdep.c:5666 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1826 [inline] sb_start_intwrite include/linux/fs.h:1948 [inline] ext4_evict_inode+0x11de/0x1d40 fs/ext4/inode.c:240 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput.part.0+0x55d/0x810 fs/inode.c:1774 iput+0x58/0x70 fs/inode.c:1764 ext4_rename+0x1411/0x2650 fs/ext4/namei.c:3985 ext4_rename2+0x1c3/0x270 fs/ext4/namei.c:4164 vfs_rename+0x115e/0x1a90 fs/namei.c:4756 do_renameat2+0xb5e/0xc80 fs/namei.c:4907 __do_sys_renameat2 fs/namei.c:4940 [inline] __se_sys_renameat2 fs/namei.c:4937 [inline] __x64_sys_renameat2+0xe4/0x120 fs/namei.c:4937 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd other info that might help us debug this: Chain exists of: sb_internal --> &sb->s_type->i_mutex_key#8 --> &sb->s_type->i_mutex_key#8/4 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sb->s_type->i_mutex_key#8/4); lock(&sb->s_type->i_mutex_key#8); lock(&sb->s_type->i_mutex_key#8/4); lock(sb_internal); *** DEADLOCK *** 5 locks held by syz-executor.4/25756: #0: ffff88807f1d2460 (sb_writers#4){.+.+}-{0:0}, at: do_renameat2+0x37b/0xc80 fs/namei.c:4843 #1: ffff88807f1d2748 (&type->s_vfs_rename_key){+.+.}-{3:3}, at: lock_rename+0x54/0x280 fs/namei.c:2994 #2: ffff88802f307258 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #2: ffff88802f307258 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename+0xa0/0x280 fs/namei.c:2998 #3: ffff88802e70c030 (&type->i_mutex_dir_key#3/2){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #3: ffff88802e70c030 (&type->i_mutex_dir_key#3/2){+.+.}-{3:3}, at: lock_rename+0xd4/0x280 fs/namei.c:2999 #4: ffff88802e70a218 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #4: ffff88802e70a218 (&sb->s_type->i_mutex_key#8/4){+.+.}-{3:3}, at: lock_two_nondirectories+0xd1/0x110 fs/inode.c:1124 stack backtrace: CPU: 1 PID: 25756 Comm: syz-executor.4 Not tainted 6.0.0-rc2-syzkaller-00044-gdf0219d11b6f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3095 [inline] check_prevs_add kernel/locking/lockdep.c:3214 [inline] validate_chain kernel/locking/lockdep.c:3829 [inline] __lock_acquire+0x2a43/0x56d0 kernel/locking/lockdep.c:5053 lock_acquire kernel/locking/lockdep.c:5666 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631 percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1826 [inline] sb_start_intwrite include/linux/fs.h:1948 [inline] ext4_evict_inode+0x11de/0x1d40 fs/ext4/inode.c:240 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput.part.0+0x55d/0x810 fs/inode.c:1774 iput+0x58/0x70 fs/inode.c:1764 ext4_rename+0x1411/0x2650 fs/ext4/namei.c:3985 ext4_rename2+0x1c3/0x270 fs/ext4/namei.c:4164 vfs_rename+0x115e/0x1a90 fs/namei.c:4756 do_renameat2+0xb5e/0xc80 fs/namei.c:4907 __do_sys_renameat2 fs/namei.c:4940 [inline] __se_sys_renameat2 fs/namei.c:4937 [inline] __x64_sys_renameat2+0xe4/0x120 fs/namei.c:4937 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f22ce289279 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f22cf4c2168 EFLAGS: 00000246 ORIG_RAX: 000000000000013c RAX: ffffffffffffffda RBX: 00007f22ce39bf80 RCX: 00007f22ce289279 RDX: 0000000000000003 RSI: 0000000020000080 RDI: 0000000000000004 RBP: 00007f22ce2e3189 R08: 0000000000000004 R09: 0000000000000000 R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffef5951f7f R14: 00007f22cf4c2300 R15: 0000000000022000