loop1: detected capacity change from 0 to 512 ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ wÞ££‘/7255 is trying to acquire lock: ffff0000c824ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: percpu_down_read include/linux/percpu-rwsem.h:77 [inline] ffff0000c824ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages_down_read fs/ext4/ext4.h:1786 [inline] ffff0000c824ab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_writepages+0x150/0x2a0 fs/ext4/inode.c:3024 but task is already holding lock: ffff0000f5a7cd48 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline] ffff0000f5a7cd48 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6425 [inline] ffff0000f5a7cd48 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x358/0x6fc fs/ext4/inode.c:6506 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->xattr_sem){++++}-{4:4}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1590 ext4_write_lock_xattr fs/ext4/xattr.h:157 [inline] ext4_destroy_inline_data+0x30/0x11c fs/ext4/inline.c:1787 ext4_do_writepages+0x3c0/0x39b4 fs/ext4/inode.c:2810 ext4_writepages+0x178/0x2a0 fs/ext4/inode.c:3025 do_writepages+0x270/0x468 mm/page-writeback.c:2634 filemap_fdatawrite_wbc mm/filemap.c:386 [inline] __filemap_fdatawrite_range mm/filemap.c:419 [inline] __filemap_fdatawrite mm/filemap.c:425 [inline] filemap_flush+0x144/0x1ec mm/filemap.c:470 ext4_convert_inline_data+0x130/0x4ec fs/ext4/inline.c:1954 ext4_fallocate+0x1a8/0x384 fs/ext4/extents.c:4793 vfs_fallocate+0x52c/0x668 fs/open.c:342 ioctl_preallocate fs/ioctl.c:290 [inline] file_ioctl+0x584/0x75c fs/ioctl.c:-1 do_vfs_ioctl+0xa10/0x1834 fs/ioctl.c:577 __do_sys_ioctl fs/ioctl.c:596 [inline] __se_sys_ioctl fs/ioctl.c:584 [inline] __arm64_sys_ioctl+0xe4/0x1c4 fs/ioctl.c:584 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 -> #0 (&sbi->s_writepages_rwsem){++++}-{0:0}: check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 percpu_down_read_internal+0x5c/0x298 include/linux/percpu-rwsem.h:53 percpu_down_read include/linux/percpu-rwsem.h:77 [inline] ext4_writepages_down_read fs/ext4/ext4.h:1786 [inline] ext4_writepages+0x150/0x2a0 fs/ext4/inode.c:3024 do_writepages+0x270/0x468 mm/page-writeback.c:2634 __writeback_single_inode+0x15c/0x13e8 fs/fs-writeback.c:1680 writeback_single_inode+0x18c/0x54c fs/fs-writeback.c:1801 write_inode_now+0x13c/0x1a4 fs/fs-writeback.c:2864 iput_final fs/inode.c:1884 [inline] iput+0x570/0x83c fs/inode.c:1923 ext4_xattr_block_set+0x13dc/0x24bc fs/ext4/xattr.c:2194 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0xeb4/0x182c fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x2a0/0x37c fs/ext4/inode.c:6385 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6428 [inline] __ext4_mark_inode_dirty+0x3c0/0x6fc fs/ext4/inode.c:6506 ext4_evict_inode+0x930/0x1084 fs/ext4/inode.c:254 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 ext4_process_orphan+0x240/0x2b4 fs/ext4/orphan.c:360 ext4_orphan_cleanup+0x930/0x107c fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5609 [inline] ext4_fill_super+0x4724/0x4ea4 fs/ext4/super.c:5728 get_tree_bdev_flags+0x360/0x414 fs/super.c:1692 get_tree_bdev+0x2c/0x3c fs/super.c:1715 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5760 vfs_get_tree+0x90/0x28c fs/super.c:1815 do_new_mount+0x278/0x7f4 fs/namespace.c:3808 path_mount+0x5b4/0xde0 fs/namespace.c:4123 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount fs/namespace.c:4324 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->xattr_sem); lock(&sbi->s_writepages_rwsem); lock(&ei->xattr_sem); rlock(&sbi->s_writepages_rwsem); *** DEADLOCK *** 3 locks held by wÞ££‘/7255: #0: ffff0000c82480e0 (&type->s_umount_key#26/1){+.+.}-{4:4}, at: alloc_super+0x1a0/0x80c fs/super.c:345 #1: ffff0000c8248618 (sb_internal){.+.+}-{0:0}, at: percpu_down_read_freezable include/linux/percpu-rwsem.h:83 [inline] #1: ffff0000c8248618 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1799 [inline] #1: ffff0000c8248618 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1982 [inline] #1: ffff0000c8248618 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x2b0/0x1084 fs/ext4/inode.c:215 #2: ffff0000f5a7cd48 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline] #2: ffff0000f5a7cd48 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6425 [inline] #2: ffff0000f5a7cd48 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x358/0x6fc fs/ext4/inode.c:6506 stack backtrace: CPU: 0 UID: 0 PID: 7255 Comm: wÞ££‘ Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 dump_stack+0x1c/0x28 lib/dump_stack.c:129 print_circular_bug+0x324/0x32c kernel/locking/lockdep.c:2043 check_noncircular+0x154/0x174 kernel/locking/lockdep.c:2175 check_prev_add kernel/locking/lockdep.c:3165 [inline] check_prevs_add kernel/locking/lockdep.c:3284 [inline] validate_chain kernel/locking/lockdep.c:3908 [inline] __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237 lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868 percpu_down_read_internal+0x5c/0x298 include/linux/percpu-rwsem.h:53 percpu_down_read include/linux/percpu-rwsem.h:77 [inline] ext4_writepages_down_read fs/ext4/ext4.h:1786 [inline] ext4_writepages+0x150/0x2a0 fs/ext4/inode.c:3024 do_writepages+0x270/0x468 mm/page-writeback.c:2634 __writeback_single_inode+0x15c/0x13e8 fs/fs-writeback.c:1680 writeback_single_inode+0x18c/0x54c fs/fs-writeback.c:1801 write_inode_now+0x13c/0x1a4 fs/fs-writeback.c:2864 iput_final fs/inode.c:1884 [inline] iput+0x570/0x83c fs/inode.c:1923 ext4_xattr_block_set+0x13dc/0x24bc fs/ext4/xattr.c:2194 ext4_xattr_move_to_block fs/ext4/xattr.c:2659 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0xeb4/0x182c fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x2a0/0x37c fs/ext4/inode.c:6385 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6428 [inline] __ext4_mark_inode_dirty+0x3c0/0x6fc fs/ext4/inode.c:6506 ext4_evict_inode+0x930/0x1084 fs/ext4/inode.c:254 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 ext4_process_orphan+0x240/0x2b4 fs/ext4/orphan.c:360 ext4_orphan_cleanup+0x930/0x107c fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5609 [inline] ext4_fill_super+0x4724/0x4ea4 fs/ext4/super.c:5728 get_tree_bdev_flags+0x360/0x414 fs/super.c:1692 get_tree_bdev+0x2c/0x3c fs/super.c:1715 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5760 vfs_get_tree+0x90/0x28c fs/super.c:1815 do_new_mount+0x278/0x7f4 fs/namespace.c:3808 path_mount+0x5b4/0xde0 fs/namespace.c:4123 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount fs/namespace.c:4324 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 ------------[ cut here ]------------ EA inode 11 i_nlink=2 WARNING: CPU: 0 PID: 7255 at fs/ext4/xattr.c:1053 ext4_xattr_inode_update_ref+0x444/0x488 fs/ext4/xattr.c:1051 Modules linked in: CPU: 0 UID: 0 PID: 7255 Comm: wÞ££‘ Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : ext4_xattr_inode_update_ref+0x444/0x488 fs/ext4/xattr.c:1051 lr : ext4_xattr_inode_update_ref+0x444/0x488 fs/ext4/xattr.c:1051 sp : ffff8000a2056dc0 x29: ffff8000a2056e50 x28: 0000000000000000 x27: 1fffe0001eb4fb53 x26: dfff800000000000 x25: ffff8000a2056dc0 x24: ffff70001440adb8 x23: ffff800092ef2000 x22: ffff0000f5a7d8e8 x21: 0000000000000002 x20: 0000000000000001 x19: ffff0000f5a7d8a8 x18: 1fffe00033771c88 x17: ffff80008f85e000 x16: ffff80008b065bd0 x15: 0000000000000001 x14: 1fffe0001b16e5c8 x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000080000 x10: 0000000000000003 x9 : e81448b89201c200 x8 : e81448b89201c200 x7 : 0000000000000000 x6 : ffff800080493890 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080485e24 x2 : 0000000000000001 x1 : ffff80008b6b38c0 x0 : 0000000000000001 Call trace: ext4_xattr_inode_update_ref+0x444/0x488 fs/ext4/xattr.c:1051 (P) ext4_xattr_inode_dec_ref fs/ext4/xattr.c:1076 [inline] ext4_xattr_set_entry+0x928/0x15c0 fs/ext4/xattr.c:1714 ext4_xattr_ibody_set+0x204/0x5fc fs/ext4/xattr.c:2263 ext4_xattr_move_to_block fs/ext4/xattr.c:2666 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2734 [inline] ext4_expand_extra_isize_ea+0xefc/0x182c fs/ext4/xattr.c:2822 __ext4_expand_extra_isize+0x2a0/0x37c fs/ext4/inode.c:6385 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6428 [inline] __ext4_mark_inode_dirty+0x3c0/0x6fc fs/ext4/inode.c:6506 ext4_evict_inode+0x930/0x1084 fs/ext4/inode.c:254 evict+0x414/0x928 fs/inode.c:810 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 ext4_process_orphan+0x240/0x2b4 fs/ext4/orphan.c:360 ext4_orphan_cleanup+0x930/0x107c fs/ext4/orphan.c:474 __ext4_fill_super fs/ext4/super.c:5609 [inline] ext4_fill_super+0x4724/0x4ea4 fs/ext4/super.c:5728 get_tree_bdev_flags+0x360/0x414 fs/super.c:1692 get_tree_bdev+0x2c/0x3c fs/super.c:1715 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5760 vfs_get_tree+0x90/0x28c fs/super.c:1815 do_new_mount+0x278/0x7f4 fs/namespace.c:3808 path_mount+0x5b4/0xde0 fs/namespace.c:4123 do_mount fs/namespace.c:4136 [inline] __do_sys_mount fs/namespace.c:4347 [inline] __se_sys_mount fs/namespace.c:4324 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4324 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 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+0x5c/0x254 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 2513 hardirqs last enabled at (2513): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (2513): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (2512): [] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (2512): [] _raw_spin_lock_irqsave+0x2c/0x7c kernel/locking/spinlock.c:162 softirqs last enabled at (2442): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (2442): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (2411): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- EXT4-fs (loop1): 1 orphan inode deleted EXT4-fs (loop1): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none. UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list xt_socket: unknown flags 0x50