EXT4-fs (loop0): 1 truncate cleaned up EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback. ====================================================== WARNING: possible circular locking dependency detected 6.12.0-rc6-syzkaller-00099-g7758b206117d #0 Not tainted ------------------------------------------------------ syz.0.863/10450 is trying to acquire lock: ffff88807a7c8de0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] ffff88807a7c8de0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ffff88807a7c8de0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1596 [inline] ffff88807a7c8de0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_lookup_create+0xc55/0x1980 fs/ext4/xattr.c:1574 but task is already holding lock: ffff88807a7cb410 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x10fc/0x2900 fs/ext4/inode.c:5459 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+0x93/0x200 kernel/locking/rwsem.c:1577 ext4_update_i_disksize fs/ext4/ext4.h:3398 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1452 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1602 [inline] ext4_xattr_inode_lookup_create+0x1457/0x1980 fs/ext4/xattr.c:1574 ext4_xattr_ibody_set+0x1d9/0x5b0 fs/ext4/xattr.c:2269 ext4_xattr_set_handle+0x939/0x1420 fs/ext4/xattr.c:2446 ext4_xattr_set+0x14b/0x360 fs/ext4/xattr.c:2560 __vfs_setxattr+0x176/0x1e0 fs/xattr.c:200 __vfs_setxattr_noperm+0x127/0x660 fs/xattr.c:234 __vfs_setxattr_locked+0x182/0x260 fs/xattr.c:295 vfs_setxattr+0x146/0x360 fs/xattr.c:321 do_setxattr+0x146/0x170 fs/xattr.c:629 path_setxattr+0x221/0x280 fs/xattr.c:658 __do_sys_lsetxattr fs/xattr.c:683 [inline] __se_sys_lsetxattr fs/xattr.c:679 [inline] __x64_sys_lsetxattr+0xc1/0x160 fs/xattr.c:679 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f -> #0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}: 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+0x250b/0x3ce0 kernel/locking/lockdep.c:5202 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 down_write+0x93/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:815 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1596 [inline] ext4_xattr_inode_lookup_create+0xc55/0x1980 fs/ext4/xattr.c:1574 ext4_xattr_block_set+0x782/0x3170 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+0x1484/0x1ae0 fs/ext4/xattr.c:2837 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:5831 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5874 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5952 ext4_setattr+0x1170/0x2900 fs/ext4/inode.c:5462 notify_change+0x6a9/0x1230 fs/attr.c:503 do_truncate+0x15c/0x220 fs/open.c:65 vfs_truncate+0x3ef/0x4e0 fs/open.c:111 do_sys_truncate fs/open.c:134 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x174/0x1e0 fs/open.c:144 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f 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#8/1); lock(&ei->i_data_sem/3); lock(&ea_inode->i_rwsem#8/1); *** DEADLOCK *** 5 locks held by syz.0.863/10450: #0: ffff88805985e420 (sb_writers#4){.+.+}-{0:0}, at: vfs_truncate+0xea/0x4e0 fs/open.c:84 #1: ffff88807a7cb580 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline] #1: ffff88807a7cb580 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: do_truncate+0x14b/0x220 fs/open.c:63 #2: ffff88807a7cb720 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #2: ffff88807a7cb720 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xd92/0x2900 fs/ext4/inode.c:5420 #3: ffff88807a7cb410 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0x10fc/0x2900 fs/ext4/inode.c:5459 #4: ffff88807a7cb250 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:161 [inline] #4: ffff88807a7cb250 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5871 [inline] #4: ffff88807a7cb250 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x4cf/0x890 fs/ext4/inode.c:5952 stack backtrace: CPU: 1 UID: 0 PID: 10450 Comm: syz.0.863 Not tainted 6.12.0-rc6-syzkaller-00099-g7758b206117d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_circular_bug+0x41c/0x610 kernel/locking/lockdep.c:2074 check_noncircular+0x31a/0x400 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+0x250b/0x3ce0 kernel/locking/lockdep.c:5202 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 down_write+0x93/0x200 kernel/locking/rwsem.c:1577 inode_lock include/linux/fs.h:815 [inline] ext4_xattr_inode_create fs/ext4/xattr.c:1514 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1596 [inline] ext4_xattr_inode_lookup_create+0xc55/0x1980 fs/ext4/xattr.c:1574 ext4_xattr_block_set+0x782/0x3170 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+0x1484/0x1ae0 fs/ext4/xattr.c:2837 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:5831 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5874 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5952 ext4_setattr+0x1170/0x2900 fs/ext4/inode.c:5462 notify_change+0x6a9/0x1230 fs/attr.c:503 do_truncate+0x15c/0x220 fs/open.c:65 vfs_truncate+0x3ef/0x4e0 fs/open.c:111 do_sys_truncate fs/open.c:134 [inline] __do_sys_truncate fs/open.c:146 [inline] __se_sys_truncate fs/open.c:144 [inline] __x64_sys_truncate+0x174/0x1e0 fs/open.c:144 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff163b7e719 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff16498b038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c RAX: ffffffffffffffda RBX: 00007ff163d35f80 RCX: 00007ff163b7e719 RDX: 0000000000000000 RSI: 000000000000003b RDI: 0000000020000180 RBP: 00007ff163bf139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ff163d35f80 R15: 00007ffc9901d488