====================================================== WARNING: possible circular locking dependency detected 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Not tainted ------------------------------------------------------ syz-executor.1/12042 is trying to acquire lock: ffff00010fdb3650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1826 [inline] ffff00010fdb3650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1948 [inline] ffff00010fdb3650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x22c/0x7ec fs/ext4/inode.c:240 but task is already holding lock: ffff00010fdb1b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ext_migrate+0xd4/0x63c fs/ext4/migrate.c:437 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}: percpu_down_write+0x6c/0x1c4 kernel/locking/percpu-rwsem.c:221 ext4_ind_migrate+0xc8/0x318 fs/ext4/migrate.c:624 ext4_ioctl_setflags+0x5b4/0x5e4 fs/ext4/ioctl.c:694 ext4_fileattr_set+0x174/0x51c fs/ext4/ioctl.c:1001 vfs_fileattr_set+0x400/0x458 fs/ioctl.c:696 do_vfs_ioctl+0x1374/0x16a4 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x98/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 -> #2 (&sb->s_type->i_mutex_key#8){++++}-{3:3}: down_read+0x5c/0x78 kernel/locking/rwsem.c:1499 inode_lock_shared include/linux/fs.h:766 [inline] ext4_bmap+0x34/0x1c8 fs/ext4/inode.c:3157 bmap+0x40/0x6c fs/inode.c:1799 jbd2_journal_bmap fs/jbd2/journal.c:971 [inline] __jbd2_journal_erase fs/jbd2/journal.c:1784 [inline] jbd2_journal_flush+0x2a8/0x55c fs/jbd2/journal.c:2490 ext4_ioctl_checkpoint fs/ext4/ioctl.c:1082 [inline] __ext4_ioctl fs/ext4/ioctl.c:1586 [inline] ext4_ioctl+0x1cb8/0x236c fs/ext4/ioctl.c:1606 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0xd0/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 -> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: __mutex_lock_common+0xd4/0xca8 kernel/locking/mutex.c:603 mutex_lock_io_nested+0x6c/0x88 kernel/locking/mutex.c:833 __jbd2_log_wait_for_space+0xc0/0x330 fs/jbd2/checkpoint.c:110 add_transaction_credits+0x4b4/0x604 fs/jbd2/transaction.c:298 start_this_handle+0x2a0/0x7fc fs/jbd2/transaction.c:422 jbd2__journal_start+0x148/0x1f0 fs/jbd2/transaction.c:520 __ext4_journal_start_sb+0x124/0x1dc fs/ext4/ext4_jbd2.c:105 __ext4_journal_start fs/ext4/ext4_jbd2.h:326 [inline] ext4_evict_inode+0x3e4/0x7ec fs/ext4/inode.c:251 evict+0xec/0x334 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x2c4/0x324 fs/inode.c:1774 do_unlinkat+0x22c/0x3dc fs/namei.c:4304 __do_sys_unlinkat fs/namei.c:4340 [inline] __se_sys_unlinkat fs/namei.c:4333 [inline] __arm64_sys_unlinkat+0x7c/0xa8 fs/namei.c:4333 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 -> #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+0x1530/0x30a4 kernel/locking/lockdep.c:5053 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 percpu_down_read+0x74/0x1e0 include/linux/percpu-rwsem.h:53 __sb_start_write include/linux/fs.h:1826 [inline] sb_start_intwrite include/linux/fs.h:1948 [inline] ext4_evict_inode+0x22c/0x7ec fs/ext4/inode.c:240 evict+0xec/0x334 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x2c4/0x324 fs/inode.c:1774 ext4_ext_migrate+0x5c8/0x63c fs/ext4/migrate.c:587 ext4_ioctl_setflags+0x5d0/0x5e4 fs/ext4/ioctl.c:692 ext4_fileattr_set+0x174/0x51c fs/ext4/ioctl.c:1001 vfs_fileattr_set+0x400/0x458 fs/ioctl.c:696 do_vfs_ioctl+0x1374/0x16a4 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x98/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 other info that might help us debug this: Chain exists of: sb_internal --> &sb->s_type->i_mutex_key#8 --> &sbi->s_writepages_rwsem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sbi->s_writepages_rwsem); lock(&sb->s_type->i_mutex_key#8); lock(&sbi->s_writepages_rwsem); lock(sb_internal); *** DEADLOCK *** 3 locks held by syz-executor.1/12042: #0: ffff00010fdb3460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write_file+0x28/0xd8 fs/namespace.c:437 #1: ffff0001128cf6c0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline] #1: ffff0001128cf6c0 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: vfs_fileattr_set+0x78/0x458 fs/ioctl.c:681 #2: ffff00010fdb1b98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_ext_migrate+0xd4/0x63c fs/ext4/migrate.c:437 stack backtrace: CPU: 1 PID: 12042 Comm: syz-executor.1 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 Call trace: dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:156 show_stack+0x2c/0x54 arch/arm64/kernel/stacktrace.c:163 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x104/0x16c lib/dump_stack.c:106 dump_stack+0x1c/0x58 lib/dump_stack.c:113 print_circular_bug+0x2c4/0x2c8 kernel/locking/lockdep.c:2053 check_noncircular+0x14c/0x154 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+0x1530/0x30a4 kernel/locking/lockdep.c:5053 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 percpu_down_read+0x74/0x1e0 include/linux/percpu-rwsem.h:53 __sb_start_write include/linux/fs.h:1826 [inline] sb_start_intwrite include/linux/fs.h:1948 [inline] ext4_evict_inode+0x22c/0x7ec fs/ext4/inode.c:240 evict+0xec/0x334 fs/inode.c:665 iput_final fs/inode.c:1748 [inline] iput+0x2c4/0x324 fs/inode.c:1774 ext4_ext_migrate+0x5c8/0x63c fs/ext4/migrate.c:587 ext4_ioctl_setflags+0x5d0/0x5e4 fs/ext4/ioctl.c:692 ext4_fileattr_set+0x174/0x51c fs/ext4/ioctl.c:1001 vfs_fileattr_set+0x400/0x458 fs/ioctl.c:696 do_vfs_ioctl+0x1374/0x16a4 __do_sys_ioctl fs/ioctl.c:868 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __arm64_sys_ioctl+0x98/0x140 fs/ioctl.c:856 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 EXT4-fs error (device loop1): ext4_do_update_inode:5149: inode #19: comm syz-executor.1: corrupted inode contents EXT4-fs error (device loop1): ext4_dirty_inode:5966: inode #19: comm syz-executor.1: mark_inode_dirty error EXT4-fs error (device loop1): ext4_do_update_inode:5149: inode #19: comm syz-executor.1: corrupted inode contents EXT4-fs error (device loop1): ext4_xattr_delete_inode:2932: inode #19: comm syz-executor.1: mark_inode_dirty error EXT4-fs error (device loop1): ext4_xattr_delete_inode:2935: inode #19: comm syz-executor.1: mark inode dirty (error -117) EXT4-fs warning (device loop1): ext4_evict_inode:299: xattr delete (err -117)