====================================================== WARNING: possible circular locking dependency detected 5.15.164-syzkaller #0 Not tainted ------------------------------------------------------ syz.3.436/5539 is trying to acquire lock: ffff0000ddda0de8 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] ffff0000ddda0de8 (&ea_inode->i_rwsem#9/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x350/0x4f4 fs/ext4/xattr.c:425 but task is already holding lock: ffff0000ddda3e48 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_truncate+0x7c0/0x1058 fs/ext4/inode.c:4233 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem/3){++++}-{3:3}: down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 ext4_update_i_disksize fs/ext4/ext4.h:3401 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1397 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1545 [inline] ext4_xattr_set_entry+0x26d0/0x3094 fs/ext4/xattr.c:1669 ext4_xattr_ibody_set+0x104/0x35c fs/ext4/xattr.c:2237 ext4_xattr_set_handle+0xa08/0x12d8 fs/ext4/xattr.c:2394 ext4_xattr_set+0x1dc/0x350 fs/ext4/xattr.c:2507 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x1a8/0x344 fs/xattr.c:303 do_setxattr fs/xattr.c:588 [inline] setxattr+0x250/0x2b4 fs/xattr.c:611 path_setxattr+0x17c/0x258 fs/xattr.c:630 __do_sys_setxattr fs/xattr.c:646 [inline] __se_sys_setxattr fs/xattr.c:642 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:642 __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 (&ea_inode->i_rwsem#9/1){+.+.}-{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 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] ext4_xattr_inode_iget+0x350/0x4f4 fs/ext4/xattr.c:425 ext4_xattr_inode_get+0x148/0x674 fs/ext4/xattr.c:485 ext4_xattr_move_to_block fs/ext4/xattr.c:2589 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0xb9c/0x169c fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5840 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5883 [inline] __ext4_mark_inode_dirty+0x4e8/0x924 fs/ext4/inode.c:5961 ext4_ext_truncate+0x94/0x250 fs/ext4/extents.c:4431 ext4_truncate+0x9c4/0x1058 fs/ext4/inode.c:4238 ext4_evict_inode+0xc30/0x124c fs/ext4/inode.c:289 evict+0x260/0x68c fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x744/0x824 fs/inode.c:1731 dentry_unlink_inode+0x37c/0x4bc fs/dcache.c:380 __dentry_kill+0x324/0x5e4 fs/dcache.c:586 dentry_kill+0xc8/0x250 dput+0x21c/0x458 fs/dcache.c:893 do_renameat2+0xa0c/0x10c0 fs/namei.c:4987 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#9/1); lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#9/1); *** DEADLOCK *** 7 locks held by syz.3.436/5539: #0: ffff0000cd56a460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377 #1: ffff0000cd56a748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: lock_rename fs/namei.c:3016 [inline] #1: ffff0000cd56a748 (&type->s_vfs_rename_key#3){+.+.}-{3:3}, at: do_renameat2+0x494/0x10c0 fs/namei.c:4924 #2: ffff0000ddda7198 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: lock_rename fs/namei.c:3017 [inline] #2: ffff0000ddda7198 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: do_renameat2+0x508/0x10c0 fs/namei.c:4924 #3: ffff0000ddda2bd0 (&type->i_mutex_dir_key#3/5){+.+.}-{3:3}, at: do_renameat2+0x534/0x10c0 fs/namei.c:4924 #4: ffff0000cd56a650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] #4: ffff0000cd56a650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline] #4: ffff0000cd56a650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x338/0x124c fs/ext4/inode.c:243 #5: ffff0000ddda3e48 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_truncate+0x7c0/0x1058 fs/ext4/inode.c:4233 #6: ffff0000ddda3c98 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #6: ffff0000ddda3c98 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5880 [inline] #6: ffff0000ddda3c98 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x468/0x924 fs/ext4/inode.c:5961 stack backtrace: CPU: 1 PID: 5539 Comm: syz.3.436 Not tainted 5.15.164-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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 down_write+0xbc/0x12c kernel/locking/rwsem.c:1551 inode_lock include/linux/fs.h:789 [inline] ext4_xattr_inode_iget+0x350/0x4f4 fs/ext4/xattr.c:425 ext4_xattr_inode_get+0x148/0x674 fs/ext4/xattr.c:485 ext4_xattr_move_to_block fs/ext4/xattr.c:2589 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2691 [inline] ext4_expand_extra_isize_ea+0xb9c/0x169c fs/ext4/xattr.c:2783 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5840 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5883 [inline] __ext4_mark_inode_dirty+0x4e8/0x924 fs/ext4/inode.c:5961 ext4_ext_truncate+0x94/0x250 fs/ext4/extents.c:4431 ext4_truncate+0x9c4/0x1058 fs/ext4/inode.c:4238 ext4_evict_inode+0xc30/0x124c fs/ext4/inode.c:289 evict+0x260/0x68c fs/inode.c:587 iput_final fs/inode.c:1705 [inline] iput+0x744/0x824 fs/inode.c:1731 dentry_unlink_inode+0x37c/0x4bc fs/dcache.c:380 __dentry_kill+0x324/0x5e4 fs/dcache.c:586 dentry_kill+0xc8/0x250 dput+0x21c/0x458 fs/dcache.c:893 do_renameat2+0xa0c/0x10c0 fs/namei.c:4987 __do_sys_renameat2 fs/namei.c:5018 [inline] __se_sys_renameat2 fs/namei.c:5015 [inline] __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015 __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