======================================================
WARNING: possible circular locking dependency detected
syzkaller #0 Not tainted
------------------------------------------------------
syz.5.2914/12496 is trying to acquire lock:
ffff88804e8cab98 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: do_writepages+0x278/0x600 mm/page-writeback.c:2598

but task is already holding lock:
ffff888067e5f448 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline]
ffff888067e5f448 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6389 [inline]
ffff888067e5f448 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x5ad/0x840 fs/ext4/inode.c:6470

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #2 (&ei->xattr_sem){++++}-{4:4}:
       down_read+0x99/0x460 kernel/locking/rwsem.c:1537
       ext4_setattr+0x862/0x2860 fs/ext4/inode.c:5865
       notify_change+0xb25/0x1330 fs/attr.c:546
       chown_common+0x51e/0x6e0 fs/open.c:778
       do_fchownat+0x18e/0x1f0 fs/open.c:806
       __do_sys_chown fs/open.c:826 [inline]
       __se_sys_chown fs/open.c:824 [inline]
       __x64_sys_chown+0x7b/0xc0 fs/open.c:824
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

-> #1 (jbd2_handle){++++}-{0:0}:
       wait_transaction_locked+0x191/0x230 fs/jbd2/transaction.c:151
       add_transaction_credits+0x110/0xe60 fs/jbd2/transaction.c:222
       start_this_handle+0x3de/0x13a0 fs/jbd2/transaction.c:403
       jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:501
       __ext4_journal_start_sb+0x32a/0x5c0 fs/ext4/ext4_jbd2.c:114
       __ext4_journal_start fs/ext4/ext4_jbd2.h:242 [inline]
       ext4_do_writepages+0xc2a/0x3df0 fs/ext4/inode.c:2914
       ext4_writepages+0x347/0x790 fs/ext4/inode.c:3026
       do_writepages+0x278/0x600 mm/page-writeback.c:2598
       __writeback_single_inode+0x164/0x1220 fs/fs-writeback.c:1750
       writeback_sb_inodes+0x72e/0x1b90 fs/fs-writeback.c:2041
       __writeback_inodes_wb+0xf8/0x2d0 fs/fs-writeback.c:2118
       wb_writeback+0x6b4/0xab0 fs/fs-writeback.c:2229
       wb_check_old_data_flush fs/fs-writeback.c:2333 [inline]
       wb_do_writeback fs/fs-writeback.c:2386 [inline]
       wb_workfn+0x885/0xbb0 fs/fs-writeback.c:2414
       process_one_work+0x9c2/0x1840 kernel/workqueue.c:3257
       process_scheduled_works kernel/workqueue.c:3340 [inline]
       worker_thread+0x5da/0xe40 kernel/workqueue.c:3421
       kthread+0x370/0x450 kernel/kthread.c:467
       ret_from_fork+0x754/0xaf0 arch/x86/kernel/process.c:158
       ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

-> #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+0x14b8/0x2630 kernel/locking/lockdep.c:5237
       lock_acquire kernel/locking/lockdep.c:5868 [inline]
       lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825
       percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
       percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
       ext4_writepages_down_read fs/ext4/ext4.h:1820 [inline]
       ext4_writepages+0x21d/0x790 fs/ext4/inode.c:3025
       do_writepages+0x278/0x600 mm/page-writeback.c:2598
       __writeback_single_inode+0x164/0x1220 fs/fs-writeback.c:1750
       writeback_single_inode+0x4d3/0xf30 fs/fs-writeback.c:1869
       write_inode_now+0x174/0x1f0 fs/fs-writeback.c:2954
       iput_final fs/inode.c:1947 [inline]
       iput.part.0+0x7f3/0xf50 fs/inode.c:2006
       iput+0x35/0x40 fs/inode.c:1972
       ext4_xattr_block_set+0x6f7/0x3660 fs/ext4/xattr.c:2204
       ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline]
       ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline]
       ext4_expand_extra_isize_ea+0x17c6/0x1d70 fs/ext4/xattr.c:2832
       __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6349
       ext4_try_to_expand_extra_isize fs/ext4/inode.c:6392 [inline]
       __ext4_mark_inode_dirty+0x63a/0x840 fs/ext4/inode.c:6470
       ext4_evict_inode+0x813/0x1760 fs/ext4/inode.c:253
       evict+0x3c2/0xad0 fs/inode.c:837
       iput_final fs/inode.c:1957 [inline]
       iput.part.0+0x605/0xf50 fs/inode.c:2006
       iput+0x35/0x40 fs/inode.c:1972
       ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472
       __ext4_fill_super fs/ext4/super.c:5663 [inline]
       ext4_fill_super+0x90b2/0xb400 fs/ext4/super.c:5782
       get_tree_bdev_flags+0x38c/0x620 fs/super.c:1694
       vfs_get_tree+0x92/0x320 fs/super.c:1754
       fc_mount fs/namespace.c:1193 [inline]
       do_new_mount_fc fs/namespace.c:3760 [inline]
       do_new_mount fs/namespace.c:3836 [inline]
       path_mount+0x7d0/0x23d0 fs/namespace.c:4146
       do_mount fs/namespace.c:4159 [inline]
       __do_sys_mount fs/namespace.c:4348 [inline]
       __se_sys_mount fs/namespace.c:4325 [inline]
       __x64_sys_mount+0x293/0x310 fs/namespace.c:4325
       do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
       do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
       entry_SYSCALL_64_after_hwframe+0x77/0x7f

other info that might help us debug this:

Chain exists of:
  &sbi->s_writepages_rwsem --> jbd2_handle --> &ei->xattr_sem

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&ei->xattr_sem);
                               lock(jbd2_handle);
                               lock(&ei->xattr_sem);
  rlock(&sbi->s_writepages_rwsem);

 *** DEADLOCK ***

3 locks held by syz.5.2914/12496:
 #0: ffff8880515520e0 (&type->s_umount_key#28/1){+.+.}-{4:4}, at: alloc_super+0x244/0xd20 fs/super.c:345
 #1: ffff888051552610 (sb_internal){.+.+}-{0:0}, at: evict+0x3c2/0xad0 fs/inode.c:837
 #2: ffff888067e5f448 (&ei->xattr_sem){++++}-{4:4}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:164 [inline]
 #2: ffff888067e5f448 (&ei->xattr_sem){++++}-{4:4}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:6389 [inline]
 #2: ffff888067e5f448 (&ei->xattr_sem){++++}-{4:4}, at: __ext4_mark_inode_dirty+0x5ad/0x840 fs/ext4/inode.c:6470

stack backtrace:
CPU: 1 UID: 0 PID: 12496 Comm: syz.5.2914 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 print_circular_bug.cold+0x178/0x1c7 kernel/locking/lockdep.c:2043
 check_noncircular+0x146/0x160 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+0x14b8/0x2630 kernel/locking/lockdep.c:5237
 lock_acquire kernel/locking/lockdep.c:5868 [inline]
 lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825
 percpu_down_read_internal include/linux/percpu-rwsem.h:53 [inline]
 percpu_down_read include/linux/percpu-rwsem.h:77 [inline]
 ext4_writepages_down_read fs/ext4/ext4.h:1820 [inline]
 ext4_writepages+0x21d/0x790 fs/ext4/inode.c:3025
 do_writepages+0x278/0x600 mm/page-writeback.c:2598
 __writeback_single_inode+0x164/0x1220 fs/fs-writeback.c:1750
 writeback_single_inode+0x4d3/0xf30 fs/fs-writeback.c:1869
 write_inode_now+0x174/0x1f0 fs/fs-writeback.c:2954
 iput_final fs/inode.c:1947 [inline]
 iput.part.0+0x7f3/0xf50 fs/inode.c:2006
 iput+0x35/0x40 fs/inode.c:1972
 ext4_xattr_block_set+0x6f7/0x3660 fs/ext4/xattr.c:2204
 ext4_xattr_move_to_block fs/ext4/xattr.c:2669 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2744 [inline]
 ext4_expand_extra_isize_ea+0x17c6/0x1d70 fs/ext4/xattr.c:2832
 __ext4_expand_extra_isize+0x346/0x480 fs/ext4/inode.c:6349
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:6392 [inline]
 __ext4_mark_inode_dirty+0x63a/0x840 fs/ext4/inode.c:6470
 ext4_evict_inode+0x813/0x1760 fs/ext4/inode.c:253
 evict+0x3c2/0xad0 fs/inode.c:837
 iput_final fs/inode.c:1957 [inline]
 iput.part.0+0x605/0xf50 fs/inode.c:2006
 iput+0x35/0x40 fs/inode.c:1972
 ext4_orphan_cleanup+0x71e/0x11e0 fs/ext4/orphan.c:472
 __ext4_fill_super fs/ext4/super.c:5663 [inline]
 ext4_fill_super+0x90b2/0xb400 fs/ext4/super.c:5782
 get_tree_bdev_flags+0x38c/0x620 fs/super.c:1694
 vfs_get_tree+0x92/0x320 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3760 [inline]
 do_new_mount fs/namespace.c:3836 [inline]
 path_mount+0x7d0/0x23d0 fs/namespace.c:4146
 do_mount fs/namespace.c:4159 [inline]
 __do_sys_mount fs/namespace.c:4348 [inline]
 __se_sys_mount fs/namespace.c:4325 [inline]
 __x64_sys_mount+0x293/0x310 fs/namespace.c:4325
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f702c39d20a
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f702d2fce58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f702d2fcee0 RCX: 00007f702c39d20a
RDX: 0000200000000180 RSI: 00002000000001c0 RDI: 00007f702d2fcea0
RBP: 0000200000000180 R08: 00007f702d2fcee0 R09: 0000000000800700
R10: 0000000000800700 R11: 0000000000000246 R12: 00002000000001c0
R13: 00007f702d2fcea0 R14: 000000000000046f R15: 0000200000000200
 </TASK>
EXT4-fs error (device loop5): ext4_xattr_inode_iget:441: inode #11: comm syz.5.2914: iget: bad extra_isize 90 (inode size 256)
loop5: lost file I/O error report for ino 11 type 5 pos 0x0 len 0x0 error -117
EXT4-fs error (device loop5): ext4_xattr_inode_iget:444: comm syz.5.2914: error while reading EA inode 11 err=-117
loop5: lost filesystem error report for type 5 error -117
EXT4-fs warning (device loop5): ext4_expand_extra_isize_ea:2857: Unable to expand inode 15. Delete some EAs or run e2fsck.
EXT4-fs error (device loop5): ext4_xattr_inode_iget:441: inode #11: comm syz.5.2914: iget: bad extra_isize 90 (inode size 256)
loop5: lost file I/O error report for ino 11 type 5 pos 0x0 len 0x0 error -117
EXT4-fs error (device loop5): ext4_xattr_inode_iget:444: comm syz.5.2914: error while reading EA inode 11 err=-117
loop5: lost filesystem error report for type 5 error -117
EXT4-fs error (device loop5): ext4_xattr_inode_iget:441: inode #18: comm syz.5.2914: iget: bad extra_isize 90 (inode size 256)
loop5: lost file I/O error report for ino 18 type 5 pos 0x0 len 0x0 error -117
EXT4-fs error (device loop5): ext4_xattr_inode_iget:444: comm syz.5.2914: error while reading EA inode 18 err=-117
loop5: lost filesystem error report for type 5 error -117
EXT4-fs error (device loop5): ext4_xattr_inode_iget:441: inode #18: comm syz.5.2914: iget: bad extra_isize 90 (inode size 256)
loop5: lost file I/O error report for ino 18 type 5 pos 0x0 len 0x0 error -117
EXT4-fs error (device loop5): ext4_xattr_inode_iget:444: comm syz.5.2914: error while reading EA inode 18 err=-117
loop5: lost filesystem error report for type 5 error -117
EXT4-fs (loop5): 1 orphan inode deleted
EXT4-fs (loop5): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.