====================================================== WARNING: possible circular locking dependency detected 5.15.104-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/24511 is trying to acquire lock: ffff88814ac82650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1742 [inline] ffff88814ac82650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1859 [inline] ffff88814ac82650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x375/0x1100 fs/ext4/inode.c:243 but task is already holding lock: ffff88814ac84bd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ext_migrate+0x314/0x12f0 fs/ext4/migrate.c:438 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 percpu_down_write+0x52/0x2d0 kernel/locking/percpu-rwsem.c:217 ext4_ind_migrate+0x254/0x760 fs/ext4/migrate.c:625 ext4_ioctl_setflags fs/ext4/ioctl.c:457 [inline] ext4_fileattr_set+0xf13/0x17d0 fs/ext4/ioctl.c:763 vfs_fileattr_set+0x8f3/0xd30 fs/ioctl.c:700 ioctl_setflags fs/ioctl.c:732 [inline] do_vfs_ioctl+0x1d85/0x2b70 fs/ioctl.c:843 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl+0x81/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #2 (&sb->s_type->i_mutex_key#9){++++}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 down_read+0x3b/0x50 kernel/locking/rwsem.c:1488 inode_lock_shared include/linux/fs.h:797 [inline] ext4_bmap+0x4b/0x410 fs/ext4/inode.c:3159 bmap+0xa1/0xd0 fs/inode.c:1714 jbd2_journal_bmap fs/jbd2/journal.c:978 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1786 [inline] jbd2_journal_flush+0x7a2/0xc90 fs/jbd2/journal.c:2492 ext4_ioctl_checkpoint fs/ext4/ioctl.c:848 [inline] __ext4_ioctl fs/ext4/ioctl.c:1266 [inline] ext4_ioctl+0x32c7/0x5b70 fs/ext4/ioctl.c:1278 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596 mutex_lock_io_nested+0x45/0x60 kernel/locking/mutex.c:777 __jbd2_log_wait_for_space+0x213/0x760 fs/jbd2/checkpoint.c:110 add_transaction_credits+0x950/0xc00 fs/jbd2/transaction.c:303 start_this_handle+0x747/0x1590 fs/jbd2/transaction.c:427 jbd2__journal_start+0x2d1/0x5c0 fs/jbd2/transaction.c:525 __ext4_journal_start_sb+0x175/0x370 fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_evict_inode+0x7dd/0x1100 fs/ext4/inode.c:254 evict+0x2a4/0x620 fs/inode.c:587 do_unlinkat+0x502/0x940 fs/namei.c:4284 __do_sys_unlink fs/namei.c:4325 [inline] __se_sys_unlink fs/namei.c:4323 [inline] __x64_sys_unlink+0x45/0x50 fs/namei.c:4323 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb -> #0 (sb_internal){.+.+}-{0:0}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 percpu_down_read+0x46/0x1b0 include/linux/percpu-rwsem.h:51 __sb_start_write include/linux/fs.h:1742 [inline] sb_start_intwrite include/linux/fs.h:1859 [inline] ext4_evict_inode+0x375/0x1100 fs/ext4/inode.c:243 evict+0x2a4/0x620 fs/inode.c:587 ext4_ext_migrate+0x100b/0x12f0 fs/ext4/migrate.c:588 __ext4_ioctl fs/ext4/ioctl.c:1027 [inline] ext4_ioctl+0x1959/0x5b70 fs/ext4/ioctl.c:1278 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb other info that might help us debug this: Chain exists of: sb_internal --> &sb->s_type->i_mutex_key#9 --> &sbi->s_writepages_rwsem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->s_writepages_rwsem); lock(&sb->s_type->i_mutex_key#9); lock(&sbi->s_writepages_rwsem); lock(sb_internal); *** DEADLOCK *** 3 locks held by syz-executor.4/24511: #0: ffff88814ac82460 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write_file+0x5a/0x1f0 fs/namespace.c:421 #1: ffff88802ab267a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline] #1: ffff88802ab267a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: __ext4_ioctl fs/ext4/ioctl.c:1026 [inline] #1: ffff88802ab267a0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_ioctl+0x1951/0x5b70 fs/ext4/ioctl.c:1278 #2: ffff88814ac84bd8 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ext_migrate+0x314/0x12f0 fs/ext4/migrate.c:438 stack backtrace: CPU: 0 PID: 24511 Comm: syz-executor.4 Not tainted 5.15.104-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain+0x1646/0x58b0 kernel/locking/lockdep.c:3787 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5011 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5622 percpu_down_read+0x46/0x1b0 include/linux/percpu-rwsem.h:51 __sb_start_write include/linux/fs.h:1742 [inline] sb_start_intwrite include/linux/fs.h:1859 [inline] ext4_evict_inode+0x375/0x1100 fs/ext4/inode.c:243 evict+0x2a4/0x620 fs/inode.c:587 ext4_ext_migrate+0x100b/0x12f0 fs/ext4/migrate.c:588 __ext4_ioctl fs/ext4/ioctl.c:1027 [inline] ext4_ioctl+0x1959/0x5b70 fs/ext4/ioctl.c:1278 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7f245d01c0f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007f245b58e168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f245d13bf80 RCX: 00007f245d01c0f9 RDX: 0000000000000000 RSI: 0000000000006609 RDI: 0000000000000004 RBP: 00007f245d077b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdddc0b70f R14: 00007f245b58e300 R15: 0000000000022000