loop1: detected capacity change from 0 to 16 erofs: (device loop1): mounted with root inode @ nid 36. ====================================================== WARNING: possible circular locking dependency detected 6.10.0-rc2-syzkaller-00366-g771ed66105de #0 Not tainted ------------------------------------------------------ syz-executor.1/6978 is trying to acquire lock: ffff8880479b94c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ffff8880479b94c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x156/0x16d0 fs/ext4/xattr.c:2367 but task is already holding lock: ffff88801ef32950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10db/0x15e0 fs/jbd2/transaction.c:463 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (jbd2_handle){++++}-{0:0}: start_this_handle+0x1101/0x15e0 fs/jbd2/transaction.c:463 jbd2__journal_start+0x394/0x6a0 fs/jbd2/transaction.c:520 __ext4_journal_start_sb+0x358/0x660 fs/ext4/ext4_jbd2.c:112 ext4_sample_last_mounted fs/ext4/file.c:837 [inline] ext4_file_open+0x636/0xc90 fs/ext4/file.c:865 do_dentry_open+0x910/0x1930 fs/open.c:955 do_open fs/namei.c:3650 [inline] path_openat+0x1e3a/0x29f0 fs/namei.c:3807 do_filp_open+0x1dc/0x430 fs/namei.c:3834 do_sys_openat2+0x17a/0x1e0 fs/open.c:1405 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1431 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 -> #2 (sb_internal){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1655 [inline] sb_start_intwrite include/linux/fs.h:1838 [inline] ext4_evict_inode+0xd7b/0x17d0 fs/ext4/inode.c:212 evict+0x2ed/0x6c0 fs/inode.c:667 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x480 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 dput.part.0+0x4b1/0x9b0 fs/dcache.c:845 dput+0x1f/0x30 fs/dcache.c:835 ovl_destroy_inode+0x3e/0x190 fs/overlayfs/super.c:181 destroy_inode+0xc4/0x1b0 fs/inode.c:311 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 dentry_unlink_inode+0x295/0x480 fs/dcache.c:400 __dentry_kill+0x1d0/0x600 fs/dcache.c:603 shrink_kill fs/dcache.c:1048 [inline] shrink_dentry_list+0x140/0x5d0 fs/dcache.c:1075 prune_dcache_sb+0xeb/0x150 fs/dcache.c:1156 super_cache_scan+0x32a/0x550 fs/super.c:221 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa87/0x1310 mm/shrinker.c:626 shrink_one+0x493/0x7c0 mm/vmscan.c:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 -> #1 (fs_reclaim){+.+.}-{0:0}: __fs_reclaim_acquire mm/page_alloc.c:3801 [inline] fs_reclaim_acquire+0x102/0x160 mm/page_alloc.c:3815 might_alloc include/linux/sched/mm.h:334 [inline] prepare_alloc_pages.constprop.0+0x155/0x560 mm/page_alloc.c:4449 __alloc_pages_noprof+0x194/0x2460 mm/page_alloc.c:4667 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] __kmalloc_large_node+0x7f/0x1a0 mm/slub.c:4067 __do_kmalloc_node mm/slub.c:4110 [inline] __kmalloc_node_noprof.cold+0x5/0x5f mm/slub.c:4129 kmalloc_node_noprof include/linux/slab.h:681 [inline] kvmalloc_node_noprof+0x6f/0x1a0 mm/util.c:634 ext4_xattr_inode_cache_find fs/ext4/xattr.c:1535 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1581 [inline] ext4_xattr_inode_lookup_create+0x4e8/0x1910 fs/ext4/xattr.c:1568 ext4_xattr_block_set+0x77a/0x3090 fs/ext4/xattr.c:1910 ext4_xattr_move_to_block fs/ext4/xattr.c:2663 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2738 [inline] ext4_expand_extra_isize_ea+0xf57/0x1990 fs/ext4/xattr.c:2830 __ext4_expand_extra_isize+0x322/0x450 fs/ext4/inode.c:5782 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5825 [inline] __ext4_mark_inode_dirty+0x55a/0x890 fs/ext4/inode.c:5903 ext4_delete_inline_entry+0x401/0x5a0 fs/ext4/inline.c:1753 ext4_delete_entry+0x128/0x480 fs/ext4/namei.c:2719 __ext4_unlink+0x7c7/0xcb0 fs/ext4/namei.c:3273 ext4_unlink+0x422/0x610 fs/ext4/namei.c:3321 vfs_unlink+0x2fb/0x9b0 fs/namei.c:4343 do_unlinkat+0x5c0/0x750 fs/namei.c:4407 __do_sys_unlinkat fs/namei.c:4450 [inline] __se_sys_unlinkat fs/namei.c:4443 [inline] __ia32_sys_unlinkat+0xc1/0x130 fs/namei.c:4443 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e -> #0 (&ei->xattr_sem){++++}-{3:3}: check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_xattr_set_handle+0x156/0x16d0 fs/ext4/xattr.c:2367 __ext4_set_acl+0x366/0x5d0 fs/ext4/acl.c:217 ext4_set_acl+0x2a0/0x5a0 fs/ext4/acl.c:259 set_posix_acl+0x25c/0x320 fs/posix_acl.c:955 vfs_remove_acl+0x2d1/0x660 fs/posix_acl.c:1242 ovl_do_remove_acl fs/overlayfs/overlayfs.h:352 [inline] ovl_workdir_create+0x4a5/0x820 fs/overlayfs/super.c:340 ovl_make_workdir fs/overlayfs/super.c:656 [inline] ovl_get_workdir fs/overlayfs/super.c:814 [inline] ovl_fill_super+0xe60/0x6970 fs/overlayfs/super.c:1382 vfs_get_super fs/super.c:1269 [inline] get_tree_nodev+0xda/0x190 fs/super.c:1288 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e1/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e other info that might help us debug this: Chain exists of: &ei->xattr_sem --> sb_internal --> jbd2_handle Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock(jbd2_handle); lock(sb_internal); lock(jbd2_handle); lock(&ei->xattr_sem); *** DEADLOCK *** 5 locks held by syz-executor.1/6978: #0: ffff888058c7c0e0 (&type->s_umount_key#57/1){+.+.}-{3:3}, at: alloc_super+0x23d/0xbd0 fs/super.c:344 #1: ffff88801e020420 (sb_writers#4){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:652 [inline] #1: ffff88801e020420 (sb_writers#4){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:814 [inline] #1: ffff88801e020420 (sb_writers#4){.+.+}-{0:0}, at: ovl_fill_super+0xe31/0x6970 fs/overlayfs/super.c:1382 #2: ffff888028bd0e00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:826 [inline] #2: ffff888028bd0e00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: ovl_workdir_create+0x13e/0x820 fs/overlayfs/super.c:290 #3: ffff8880479b9800 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:791 [inline] #3: ffff8880479b9800 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_remove_acl+0xe1/0x660 fs/posix_acl.c:1223 #4: ffff88801ef32950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x10db/0x15e0 fs/jbd2/transaction.c:463 stack backtrace: CPU: 2 PID: 6978 Comm: syz-executor.1 Not tainted 6.10.0-rc2-syzkaller-00366-g771ed66105de #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 check_noncircular+0x31a/0x400 kernel/locking/lockdep.c:2187 check_prev_add kernel/locking/lockdep.c:3134 [inline] check_prevs_add kernel/locking/lockdep.c:3253 [inline] validate_chain kernel/locking/lockdep.c:3869 [inline] __lock_acquire+0x2478/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719 down_write+0x3a/0x50 kernel/locking/rwsem.c:1579 ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] ext4_xattr_set_handle+0x156/0x16d0 fs/ext4/xattr.c:2367 __ext4_set_acl+0x366/0x5d0 fs/ext4/acl.c:217 ext4_set_acl+0x2a0/0x5a0 fs/ext4/acl.c:259 set_posix_acl+0x25c/0x320 fs/posix_acl.c:955 vfs_remove_acl+0x2d1/0x660 fs/posix_acl.c:1242 ovl_do_remove_acl fs/overlayfs/overlayfs.h:352 [inline] ovl_workdir_create+0x4a5/0x820 fs/overlayfs/super.c:340 ovl_make_workdir fs/overlayfs/super.c:656 [inline] ovl_get_workdir fs/overlayfs/super.c:814 [inline] ovl_fill_super+0xe60/0x6970 fs/overlayfs/super.c:1382 vfs_get_super fs/super.c:1269 [inline] get_tree_nodev+0xda/0x190 fs/super.c:1288 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x6e1/0x1f10 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __ia32_sys_mount+0x295/0x320 fs/namespace.c:3875 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf72b4579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f5ea65ac EFLAGS: 00000292 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200000c0 RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000020000900 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi