====================================================== WARNING: possible circular locking dependency detected 6.8.0-rc2-syzkaller-00031-g861c0981648f #0 Not tainted ------------------------------------------------------ syz-executor.2/32429 is trying to acquire lock: ffffffff8d319ea0 (fs_reclaim){+.+.}-{0:0}, at: might_alloc include/linux/sched/mm.h:303 [inline] ffffffff8d319ea0 (fs_reclaim){+.+.}-{0:0}, at: slab_pre_alloc_hook mm/slub.c:3761 [inline] ffffffff8d319ea0 (fs_reclaim){+.+.}-{0:0}, at: slab_alloc_node mm/slub.c:3842 [inline] ffffffff8d319ea0 (fs_reclaim){+.+.}-{0:0}, at: kmalloc_trace+0x51/0x340 mm/slub.c:4007 but task is already holding lock: ffffffff8db384f0 ((crypto_chain).rwsem){++++}-{3:3}, at: blocking_notifier_call_chain kernel/notifier.c:387 [inline] ffffffff8db384f0 ((crypto_chain).rwsem){++++}-{3:3}, at: blocking_notifier_call_chain+0x53/0x90 kernel/notifier.c:376 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 ((crypto_chain).rwsem){++++}-{3:3}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 blocking_notifier_call_chain kernel/notifier.c:387 [inline] blocking_notifier_call_chain+0x53/0x90 kernel/notifier.c:376 crypto_probing_notify crypto/api.c:305 [inline] crypto_alg_mod_lookup+0x2a0/0x4b0 crypto/api.c:335 crypto_find_alg crypto/api.c:580 [inline] crypto_alloc_tfm_node+0xd3/0x260 crypto/api.c:617 cryptd_alloc_skcipher+0x113/0x200 crypto/cryptd.c:960 simd_skcipher_init+0x69/0x1a0 crypto/simd.c:122 crypto_skcipher_init_tfm+0x177/0x2c0 crypto/skcipher.c:790 crypto_create_tfm_node+0xfd/0x310 crypto/api.c:522 crypto_alloc_tfm_node+0x102/0x260 crypto/api.c:623 derive_key_aes+0x144/0x4d0 fs/crypto/keysetup_v1.c:55 setup_v1_file_key_derived fs/crypto/keysetup_v1.c:282 [inline] fscrypt_setup_v1_file_key+0x1ce/0x550 fs/crypto/keysetup_v1.c:299 fscrypt_setup_v1_file_key_via_subscribed_keyrings+0x159/0x2d0 fs/crypto/keysetup_v1.c:321 setup_file_encryption_key fs/crypto/keysetup.c:485 [inline] fscrypt_setup_encryption_info+0xb69/0x1080 fs/crypto/keysetup.c:590 fscrypt_get_encryption_info+0x3d1/0x4b0 fs/crypto/keysetup.c:675 fscrypt_setup_filename+0x238/0xd80 fs/crypto/fname.c:458 __fscrypt_prepare_lookup+0x2c/0xf0 fs/crypto/hooks.c:100 fscrypt_prepare_lookup include/linux/fscrypt.h:979 [inline] ext4_fname_prepare_lookup+0x1d8/0x350 fs/ext4/crypto.c:48 ext4_lookup_entry fs/ext4/namei.c:1764 [inline] ext4_lookup+0x147/0x740 fs/ext4/namei.c:1839 lookup_open.isra.0+0x926/0x13b0 fs/namei.c:3474 open_last_lookups fs/namei.c:3565 [inline] path_openat+0x931/0x2990 fs/namei.c:3795 do_filp_open+0x1de/0x430 fs/namei.c:3825 do_sys_openat2+0x176/0x1e0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_open fs/open.c:1427 [inline] __se_sys_open fs/open.c:1423 [inline] __x64_sys_open+0x154/0x1e0 fs/open.c:1423 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #3 (&type->lock_class#3){++++}-{3:3}: down_read+0x9a/0x330 kernel/locking/rwsem.c:1526 find_and_lock_process_key+0x97/0x390 fs/crypto/keysetup_v1.c:112 fscrypt_setup_v1_file_key_via_subscribed_keyrings+0x115/0x2d0 fs/crypto/keysetup_v1.c:310 setup_file_encryption_key fs/crypto/keysetup.c:485 [inline] fscrypt_setup_encryption_info+0xb69/0x1080 fs/crypto/keysetup.c:590 fscrypt_get_encryption_info+0x3d1/0x4b0 fs/crypto/keysetup.c:675 fscrypt_setup_filename+0x238/0xd80 fs/crypto/fname.c:458 ext4_fname_setup_filename+0xa3/0x250 fs/ext4/crypto.c:28 ext4_add_entry+0x2e3/0xdf0 fs/ext4/namei.c:2401 ext4_rename+0x16a5/0x2890 fs/ext4/namei.c:3937 ext4_rename2+0x1bc/0x270 fs/ext4/namei.c:4215 vfs_rename+0xf83/0x20a0 fs/namei.c:4879 do_renameat2+0xc50/0xdc0 fs/namei.c:5036 __do_sys_renameat fs/namei.c:5077 [inline] __se_sys_renameat fs/namei.c:5074 [inline] __x64_sys_renameat+0xc6/0x100 fs/namei.c:5074 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #2 (jbd2_handle){++++}-{0:0}: start_this_handle+0x10ff/0x15e0 fs/jbd2/transaction.c:463 jbd2__journal_start+0x391/0x840 fs/jbd2/transaction.c:520 __ext4_journal_start_sb+0x343/0x5d0 fs/ext4/ext4_jbd2.c:112 ext4_sample_last_mounted fs/ext4/file.c:837 [inline] ext4_file_open+0x632/0xc80 fs/ext4/file.c:866 do_dentry_open+0x8d6/0x18c0 fs/open.c:953 do_open fs/namei.c:3641 [inline] path_openat+0x1df6/0x2990 fs/namei.c:3798 do_filp_open+0x1de/0x430 fs/namei.c:3825 do_sys_openat2+0x176/0x1e0 fs/open.c:1404 do_sys_open fs/open.c:1419 [inline] __do_sys_openat fs/open.c:1435 [inline] __se_sys_openat fs/open.c:1430 [inline] __x64_sys_openat+0x175/0x210 fs/open.c:1430 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b -> #1 (sb_internal){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1639 [inline] sb_start_intwrite include/linux/fs.h:1822 [inline] ext4_evict_inode+0xe5b/0x1a40 fs/ext4/inode.c:212 evict+0x2ed/0x6b0 fs/inode.c:665 iput_final fs/inode.c:1739 [inline] iput.part.0+0x560/0x7b0 fs/inode.c:1765 iput+0x5c/0x80 fs/inode.c:1755 dentry_unlink_inode+0x292/0x430 fs/dcache.c:400 __dentry_kill+0x1ca/0x5f0 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+0x327/0x540 fs/super.c:221 do_shrink_slab+0x428/0x1120 mm/shrinker.c:435 shrink_slab_memcg mm/shrinker.c:548 [inline] shrink_slab+0xa83/0x1310 mm/shrinker.c:626 shrink_one+0x48f/0x7b0 mm/vmscan.c:4767 shrink_many mm/vmscan.c:4828 [inline] lru_gen_shrink_node mm/vmscan.c:4929 [inline] shrink_node+0x2149/0x3740 mm/vmscan.c:5888 kswapd_shrink_node mm/vmscan.c:6693 [inline] balance_pgdat+0x9d2/0x1a90 mm/vmscan.c:6883 kswapd+0x5be/0xbf0 mm/vmscan.c:7143 kthread+0x2c6/0x3a0 kernel/kthread.c:388 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 -> #0 (fs_reclaim){+.+.}-{0:0}: 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+0x2445/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3692 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3706 might_alloc include/linux/sched/mm.h:303 [inline] slab_pre_alloc_hook mm/slub.c:3761 [inline] slab_alloc_node mm/slub.c:3842 [inline] kmalloc_trace+0x51/0x340 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] cryptomgr_schedule_probe crypto/algboss.c:85 [inline] cryptomgr_notify+0xa0/0xbb0 crypto/algboss.c:226 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 blocking_notifier_call_chain kernel/notifier.c:388 [inline] blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:376 crypto_probing_notify crypto/api.c:305 [inline] crypto_alg_mod_lookup+0x2a0/0x4b0 crypto/api.c:335 crypto_find_alg crypto/api.c:580 [inline] crypto_alloc_tfm_node+0xd3/0x260 crypto/api.c:617 fscrypt_allocate_skcipher fs/crypto/keysetup.c:106 [inline] fscrypt_prepare_key+0x92/0x410 fs/crypto/keysetup.c:158 fscrypt_set_per_file_enc_key fs/crypto/keysetup.c:185 [inline] fscrypt_setup_v2_file_key+0x3f7/0x5e0 fs/crypto/keysetup.c:374 setup_file_encryption_key fs/crypto/keysetup.c:505 [inline] fscrypt_setup_encryption_info+0xded/0x1080 fs/crypto/keysetup.c:590 fscrypt_get_encryption_info+0x3d1/0x4b0 fs/crypto/keysetup.c:675 fscrypt_setup_filename+0x238/0xd80 fs/crypto/fname.c:458 __fscrypt_prepare_lookup+0x2c/0xf0 fs/crypto/hooks.c:100 fscrypt_prepare_lookup include/linux/fscrypt.h:979 [inline] ext4_fname_prepare_lookup+0x1d8/0x350 fs/ext4/crypto.c:48 ext4_lookup_entry fs/ext4/namei.c:1764 [inline] ext4_lookup+0x147/0x740 fs/ext4/namei.c:1839 __lookup_slow+0x24d/0x450 fs/namei.c:1693 lookup_one+0x181/0x1b0 fs/namei.c:2785 ovl_lookup_upper fs/overlayfs/overlayfs.h:401 [inline] ovl_workdir_create+0x1d6/0x820 fs/overlayfs/super.c:300 ovl_make_workdir fs/overlayfs/super.c:664 [inline] ovl_get_workdir fs/overlayfs/super.c:822 [inline] ovl_fill_super+0xe68/0x6720 fs/overlayfs/super.c:1390 vfs_get_super fs/super.c:1273 [inline] get_tree_nodev+0xd6/0x180 fs/super.c:1292 vfs_get_tree+0x8c/0x370 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 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] __x64_sys_mount+0x293/0x310 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b other info that might help us debug this: Chain exists of: fs_reclaim --> &type->lock_class#3 --> (crypto_chain).rwsem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- rlock((crypto_chain).rwsem); lock(&type->lock_class#3); lock((crypto_chain).rwsem); lock(fs_reclaim); *** DEADLOCK *** 5 locks held by syz-executor.2/32429: #0: ffff888048f140e0 (&type->s_umount_key#84/1){+.+.}-{3:3}, at: alloc_super+0x238/0xb50 fs/super.c:345 #1: ffff888022950420 (sb_writers#5){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:660 [inline] #1: ffff888022950420 (sb_writers#5){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:822 [inline] #1: ffff888022950420 (sb_writers#5){.+.+}-{0:0}, at: ovl_fill_super+0xe39/0x6720 fs/overlayfs/super.c:1390 #2: ffff88802dd25e00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline] #2: ffff88802dd25e00 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: ovl_workdir_create+0x13e/0x820 fs/overlayfs/super.c:298 #3: ffff88805c7dd880 (&mk->mk_sem){++++}-{3:3}, at: setup_file_encryption_key fs/crypto/keysetup.c:487 [inline] #3: ffff88805c7dd880 (&mk->mk_sem){++++}-{3:3}, at: fscrypt_setup_encryption_info+0x5d6/0x1080 fs/crypto/keysetup.c:590 #4: ffffffff8db384f0 ((crypto_chain).rwsem){++++}-{3:3}, at: blocking_notifier_call_chain kernel/notifier.c:387 [inline] #4: ffffffff8db384f0 ((crypto_chain).rwsem){++++}-{3:3}, at: blocking_notifier_call_chain+0x53/0x90 kernel/notifier.c:376 stack backtrace: CPU: 0 PID: 32429 Comm: syz-executor.2 Not tainted 6.8.0-rc2-syzkaller-00031-g861c0981648f #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+0xd9/0x1b0 lib/dump_stack.c:106 check_noncircular+0x317/0x400 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+0x2445/0x3b30 kernel/locking/lockdep.c:5137 lock_acquire kernel/locking/lockdep.c:5754 [inline] lock_acquire+0x1ae/0x520 kernel/locking/lockdep.c:5719 __fs_reclaim_acquire mm/page_alloc.c:3692 [inline] fs_reclaim_acquire+0x100/0x150 mm/page_alloc.c:3706 might_alloc include/linux/sched/mm.h:303 [inline] slab_pre_alloc_hook mm/slub.c:3761 [inline] slab_alloc_node mm/slub.c:3842 [inline] kmalloc_trace+0x51/0x340 mm/slub.c:4007 kmalloc include/linux/slab.h:590 [inline] kzalloc include/linux/slab.h:711 [inline] cryptomgr_schedule_probe crypto/algboss.c:85 [inline] cryptomgr_notify+0xa0/0xbb0 crypto/algboss.c:226 notifier_call_chain+0xb6/0x3b0 kernel/notifier.c:93 blocking_notifier_call_chain kernel/notifier.c:388 [inline] blocking_notifier_call_chain+0x69/0x90 kernel/notifier.c:376 crypto_probing_notify crypto/api.c:305 [inline] crypto_alg_mod_lookup+0x2a0/0x4b0 crypto/api.c:335 crypto_find_alg crypto/api.c:580 [inline] crypto_alloc_tfm_node+0xd3/0x260 crypto/api.c:617 fscrypt_allocate_skcipher fs/crypto/keysetup.c:106 [inline] fscrypt_prepare_key+0x92/0x410 fs/crypto/keysetup.c:158 fscrypt_set_per_file_enc_key fs/crypto/keysetup.c:185 [inline] fscrypt_setup_v2_file_key+0x3f7/0x5e0 fs/crypto/keysetup.c:374 setup_file_encryption_key fs/crypto/keysetup.c:505 [inline] fscrypt_setup_encryption_info+0xded/0x1080 fs/crypto/keysetup.c:590 fscrypt_get_encryption_info+0x3d1/0x4b0 fs/crypto/keysetup.c:675 fscrypt_setup_filename+0x238/0xd80 fs/crypto/fname.c:458 __fscrypt_prepare_lookup+0x2c/0xf0 fs/crypto/hooks.c:100 fscrypt_prepare_lookup include/linux/fscrypt.h:979 [inline] ext4_fname_prepare_lookup+0x1d8/0x350 fs/ext4/crypto.c:48 ext4_lookup_entry fs/ext4/namei.c:1764 [inline] ext4_lookup+0x147/0x740 fs/ext4/namei.c:1839 __lookup_slow+0x24d/0x450 fs/namei.c:1693 lookup_one+0x181/0x1b0 fs/namei.c:2785 ovl_lookup_upper fs/overlayfs/overlayfs.h:401 [inline] ovl_workdir_create+0x1d6/0x820 fs/overlayfs/super.c:300 ovl_make_workdir fs/overlayfs/super.c:664 [inline] ovl_get_workdir fs/overlayfs/super.c:822 [inline] ovl_fill_super+0xe68/0x6720 fs/overlayfs/super.c:1390 vfs_get_super fs/super.c:1273 [inline] get_tree_nodev+0xd6/0x180 fs/super.c:1292 vfs_get_tree+0x8c/0x370 fs/super.c:1784 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 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] __x64_sys_mount+0x293/0x310 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xd3/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f97daa7cda9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f97db80e0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f97dababf80 RCX: 00007f97daa7cda9 RDX: 0000000020000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007f97daac947a R08: 0000000020000140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f97dababf80 R15: 00007fffbf203f18 fscrypt (sda1, inode 2010): Missing crypto API support for Adiantum (API name: "adiantum(xchacha12,aes)") fscrypt (sda1, inode 2010): Missing crypto API support for Adiantum (API name: "adiantum(xchacha12,aes)") overlayfs: failed to create directory ./file0/work (errno: 65); mounting read-only