====================================================== WARNING: possible circular locking dependency detected 6.13.0-rc3-syzkaller-g573067a5a685 #0 Not tainted ------------------------------------------------------ syz.7.181/8045 is trying to acquire lock: ffff0000f49bdd20 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline] ffff0000f49bdd20 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}, at: ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ffff0000f49bdd20 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}, at: ext4_xattr_inode_lookup_create+0xe0c/0x1a28 fs/ext4/xattr.c:1596 but task is already holding lock: ffff0000ddc2c7e0 (&ei->i_data_sem/3){++++}-{4:4}, at: ext4_truncate+0x7f4/0x10ac fs/ext4/inode.c:4212 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem/3){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 ext4_update_i_disksize fs/ext4/ext4.h:3394 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1452 [inline] ext4_xattr_inode_lookup_create+0x1328/0x1a28 fs/ext4/xattr.c:1602 ext4_xattr_ibody_set+0x1b0/0x604 fs/ext4/xattr.c:2269 ext4_xattr_set_handle+0xb64/0x12d0 fs/ext4/xattr.c:2446 ext4_xattr_set+0x224/0x344 fs/ext4/xattr.c:2560 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:200 __vfs_setxattr_noperm+0x110/0x578 fs/xattr.c:234 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:295 vfs_setxattr+0x1a8/0x344 fs/xattr.c:321 do_setxattr fs/xattr.c:636 [inline] filename_setxattr+0x260/0x404 fs/xattr.c:665 path_setxattrat+0x370/0x41c fs/xattr.c:713 __do_sys_setxattr fs/xattr.c:747 [inline] __se_sys_setxattr fs/xattr.c:743 [inline] __arm64_sys_setxattr+0xc0/0xdc fs/xattr.c:743 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 -> #0 (&sb->s_type->i_mutex_key#8/1){+.+.}-{4:4}: check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:818 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ext4_xattr_inode_lookup_create+0xe0c/0x1a28 fs/ext4/xattr.c:1596 ext4_xattr_block_set+0x224/0x2e08 fs/ext4/xattr.c:1916 ext4_xattr_move_to_block fs/ext4/xattr.c:2670 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2745 [inline] ext4_expand_extra_isize_ea+0xeb4/0x16c0 fs/ext4/xattr.c:2837 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5888 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5931 [inline] __ext4_mark_inode_dirty+0x458/0x868 fs/ext4/inode.c:6009 ext4_ext_truncate+0x94/0x1d4 fs/ext4/extents.c:4457 ext4_truncate+0x9dc/0x10ac fs/ext4/inode.c:4217 ext4_evict_inode+0xaf4/0x10e8 fs/ext4/inode.c:263 evict+0x444/0x978 fs/inode.c:796 iput_final fs/inode.c:1946 [inline] iput+0x740/0x8e8 fs/inode.c:1972 do_unlinkat+0x528/0x700 fs/namei.c:4594 __do_sys_unlinkat fs/namei.c:4630 [inline] __se_sys_unlinkat fs/namei.c:4623 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4623 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/3); lock(&sb->s_type->i_mutex_key#8/1); lock(&ei->i_data_sem/3); lock(&sb->s_type->i_mutex_key#8/1); *** DEADLOCK *** 4 locks held by syz.7.181/8045: #0: ffff0000db58a420 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:515 #1: ffff0000db58a610 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1725 [inline] #1: ffff0000db58a610 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1908 [inline] #1: ffff0000db58a610 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x2c0/0x10e8 fs/ext4/inode.c:217 #2: ffff0000ddc2c7e0 (&ei->i_data_sem/3){++++}-{4:4}, at: ext4_truncate+0x7f4/0x10ac fs/ext4/inode.c:4212 #3: ffff0000ddc2c620 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:161 [inline] #3: ffff0000ddc2c620 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5928 [inline] #3: ffff0000ddc2c620 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x3d8/0x868 fs/ext4/inode.c:6009 stack backtrace: CPU: 0 UID: 0 PID: 8045 Comm: syz.7.181 Not tainted 6.13.0-rc3-syzkaller-g573067a5a685 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (C) __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x154/0x1c0 kernel/locking/lockdep.c:2074 check_noncircular+0x310/0x404 kernel/locking/lockdep.c:2206 check_prev_add kernel/locking/lockdep.c:3161 [inline] check_prevs_add kernel/locking/lockdep.c:3280 [inline] validate_chain kernel/locking/lockdep.c:3904 [inline] __lock_acquire+0x34f0/0x7904 kernel/locking/lockdep.c:5226 lock_acquire+0x23c/0x724 kernel/locking/lockdep.c:5849 down_write+0x50/0xc0 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:818 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ext4_xattr_inode_lookup_create+0xe0c/0x1a28 fs/ext4/xattr.c:1596 ext4_xattr_block_set+0x224/0x2e08 fs/ext4/xattr.c:1916 ext4_xattr_move_to_block fs/ext4/xattr.c:2670 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2745 [inline] ext4_expand_extra_isize_ea+0xeb4/0x16c0 fs/ext4/xattr.c:2837 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5888 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5931 [inline] __ext4_mark_inode_dirty+0x458/0x868 fs/ext4/inode.c:6009 ext4_ext_truncate+0x94/0x1d4 fs/ext4/extents.c:4457 ext4_truncate+0x9dc/0x10ac fs/ext4/inode.c:4217 ext4_evict_inode+0xaf4/0x10e8 fs/ext4/inode.c:263 evict+0x444/0x978 fs/inode.c:796 iput_final fs/inode.c:1946 [inline] iput+0x740/0x8e8 fs/inode.c:1972 do_unlinkat+0x528/0x700 fs/namei.c:4594 __do_sys_unlinkat fs/namei.c:4630 [inline] __se_sys_unlinkat fs/namei.c:4623 [inline] __arm64_sys_unlinkat+0xc8/0xf8 fs/namei.c:4623 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 EXT4-fs (loop7): unmounting filesystem 00000000-0000-0000-0000-000000000000.