====================================================== WARNING: possible circular locking dependency detected 5.15.158-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/6979 is trying to acquire lock: ffff0000d3ae43f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: __jbd2_log_wait_for_space+0x1a4/0x5cc fs/jbd2/checkpoint.c:71 but task is already holding lock: ffff0000d3ade650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] ffff0000d3ade650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline] ffff0000d3ade650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x338/0x124c fs/ext4/inode.c:243 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (sb_internal){.+.+}-{0:0}: percpu_down_read+0xec/0x3a8 include/linux/percpu-rwsem.h:51 __sb_start_write include/linux/fs.h:1811 [inline] sb_start_intwrite include/linux/fs.h:1928 [inline] ext4_evict_inode+0x338/0x124c fs/ext4/inode.c:243 evict+0x260/0x68c fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x744/0x824 fs/inode.c:1731 ext4_ext_migrate+0xc3c/0xee4 fs/ext4/migrate.c:588 __ext4_ioctl fs/ext4/ioctl.c:1028 [inline] ext4_ioctl+0x1904/0x61bc fs/ext4/ioctl.c:1276 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #2 (&sbi->s_writepages_rwsem){++++}-{0:0}: percpu_down_write+0xd8/0x3b0 kernel/locking/percpu-rwsem.c:217 ext4_ind_migrate+0x170/0x58c fs/ext4/migrate.c:625 ext4_ioctl_setflags fs/ext4/ioctl.c:457 [inline] ext4_fileattr_set+0xbe0/0x12d0 fs/ext4/ioctl.c:765 vfs_fileattr_set+0x70c/0xad4 fs/ioctl.c:700 do_vfs_ioctl+0x1634/0x2a38 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #1 (&sb->s_type->i_mutex_key#9){++++}-{3:3}: down_read+0xc0/0x398 kernel/locking/rwsem.c:1498 inode_lock_shared include/linux/fs.h:799 [inline] ext4_bmap+0x58/0x36c fs/ext4/inode.c:3152 bmap+0xa8/0xe8 fs/inode.c:1756 jbd2_journal_bmap fs/jbd2/journal.c:980 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1790 [inline] jbd2_journal_flush+0x63c/0xaa0 fs/jbd2/journal.c:2496 ext4_ioctl_checkpoint fs/ext4/ioctl.c:849 [inline] __ext4_ioctl fs/ext4/ioctl.c:1267 [inline] ext4_ioctl+0x3454/0x61bc fs/ext4/ioctl.c:1276 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 -> #0 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 mutex_lock_io_nested+0xcc/0x12c kernel/locking/mutex.c:777 __jbd2_log_wait_for_space+0x1a4/0x5cc fs/jbd2/checkpoint.c:71 add_transaction_credits+0x814/0xb90 fs/jbd2/transaction.c:299 start_this_handle+0x578/0x12a4 fs/jbd2/transaction.c:423 jbd2__journal_start+0x29c/0x7b4 fs/jbd2/transaction.c:521 __ext4_journal_start_sb+0x358/0x70c fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_evict_inode+0x7c0/0x124c fs/ext4/inode.c:254 evict+0x260/0x68c fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x744/0x824 fs/inode.c:1731 d_delete_notify include/linux/fsnotify.h:261 [inline] vfs_rmdir+0x2f8/0x3f0 fs/namei.c:4162 do_rmdir+0x2e8/0x84c fs/namei.c:4210 __do_sys_unlinkat fs/namei.c:4390 [inline] __se_sys_unlinkat fs/namei.c:4384 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4384 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 other info that might help us debug this: Chain exists of: &journal->j_checkpoint_mutex --> &sbi->s_writepages_rwsem --> sb_internal Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_internal); lock(&sbi->s_writepages_rwsem); lock(sb_internal); lock(&journal->j_checkpoint_mutex); *** DEADLOCK *** 3 locks held by syz-executor.3/6979: #0: ffff0000d3ade460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000edbab5c8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline] #1: ffff0000edbab5c8 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_rmdir+0x1e0/0x84c fs/namei.c:4197 #2: ffff0000d3ade650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] #2: ffff0000d3ade650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline] #2: ffff0000d3ade650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x338/0x124c fs/ext4/inode.c:243 stack backtrace: CPU: 1 PID: 6979 Comm: syz-executor.3 Not tainted 5.15.158-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2011 check_noncircular+0x2cc/0x378 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 kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x32d4/0x7638 kernel/locking/lockdep.c:5012 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596 mutex_lock_io_nested+0xcc/0x12c kernel/locking/mutex.c:777 __jbd2_log_wait_for_space+0x1a4/0x5cc fs/jbd2/checkpoint.c:71 add_transaction_credits+0x814/0xb90 fs/jbd2/transaction.c:299 start_this_handle+0x578/0x12a4 fs/jbd2/transaction.c:423 jbd2__journal_start+0x29c/0x7b4 fs/jbd2/transaction.c:521 __ext4_journal_start_sb+0x358/0x70c fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_evict_inode+0x7c0/0x124c fs/ext4/inode.c:254 evict+0x260/0x68c fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x744/0x824 fs/inode.c:1731 d_delete_notify include/linux/fsnotify.h:261 [inline] vfs_rmdir+0x2f8/0x3f0 fs/namei.c:4162 do_rmdir+0x2e8/0x84c fs/namei.c:4210 __do_sys_unlinkat fs/namei.c:4390 [inline] __se_sys_unlinkat fs/namei.c:4384 [inline] __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4384 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584