program: r0 = syz_mount_image$ext4(&(0x7f0000000240)='ext4\x00', &(0x7f0000000280)='mnt\x00', 0x4, &(0x7f0000000000), 0x0, 0x236, &(0x7f0000000300)="$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") r1 = openat(0xffffffffffffff9c, &(0x7f0000000540)='mnt\x00', 0x0, 0x0) ioctl$FS_IOC_ADD_ENCRYPTION_KEY(r1, 0xc0506617, &(0x7f0000000580)={@id={0x2, 0x0, @a}, 0x40, 0x0, '\x00', @a}) mkdirat(0xffffffffffffff9c, &(0x7f0000000640)='mnt/encrypted_dir\x00', 0x0) r2 = openat(0xffffffffffffff9c, &(0x7f0000000680)='mnt/encrypted_dir\x00', 0x800, 0x0) ioctl$FS_IOC_SET_ENCRYPTION_POLICY(r2, 0x800c6613, &(0x7f00000006c0)=@v2={0x2, @aes128, 0x0, '\x00', @a}) chdir(&(0x7f00000002c0)='mnt/encrypted_dir\x00') sendmsg$IPCTNL_MSG_CT_DELETE(r1, 0x0, 0x20040000) openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000180)='memory.events\x00', 0x26e1, 0x0) ioctl$FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS(r2, 0xc0406619, &(0x7f0000000080)={@id={0x2, 0x0, @a}}) open_tree(0xffffffffffffff9c, 0x0, 0x89901) ioctl$FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS(r0, 0xc0406619, &(0x7f0000000040)={@id={0x2, 0x0, @a}}) [ 76.714335][ T1314] ieee802154 phy0 wpan0: encryption failed: -22 [ 76.717799][ T1314] ieee802154 phy1 wpan1: encryption failed: -22 [ 76.844188][ T5323] loop0: detected capacity change from 0 to 128 [ 76.863967][ T5323] EXT4-fs (loop0): mounted filesystem 76b65be2-f6da-4727-8c75-0525a5b65a09 r/w without journal. Quota mode: none. [ 76.892703][ T5323] ext4 filesystem being mounted at /0/mnt supports timestamps until 2038-01-19 (0x7fffffff) [ 76.930826][ T5323] fscrypt: AES-128-CBC-CTS using implementation "cts-cbc-aes-aesni" [ 77.006338][ T5323] fscrypt: AES-128-CBC-ESSIV using implementation "essiv(cbc-aes-aesni,sha256-lib)" [ 77.020289][ T5324] fscrypt: loop0: 2 inode(s) still busy after removing key with identifier 69b2f6edeee720cce0577937eb8a6751, including ino 13 [ 77.047190][ T5323] fscrypt: loop0: 2 inode(s) still busy after removing key with identifier 69b2f6edeee720cce0577937eb8a6751, including ino 13 [ 77.103991][ T76] [ 77.105313][ T76] ====================================================== [ 77.108402][ T76] WARNING: possible circular locking dependency detected [ 77.111234][ T76] syzkaller #0 Not tainted [ 77.113119][ T76] ------------------------------------------------------ [ 77.115939][ T76] kswapd0/76 is trying to acquire lock: [ 77.118457][ T76] ffff88803efdb098 (&type->lock_class){+.+.}-{4:4}, at: keyring_clear+0xaf/0x240 [ 77.122542][ T76] [ 77.122542][ T76] but task is already holding lock: [ 77.125836][ T76] ffffffff8e047c40 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x951/0x2800 [ 77.129559][ T76] [ 77.129559][ T76] which lock already depends on the new lock. [ 77.129559][ T76] [ 77.134028][ T76] [ 77.134028][ T76] the existing dependency chain (in reverse order) is: [ 77.137920][ T76] [ 77.137920][ T76] -> #1 (fs_reclaim){+.+.}-{0:0}: [ 77.140954][ T76] lock_acquire+0x120/0x360 [ 77.143337][ T76] fs_reclaim_acquire+0x72/0x100 [ 77.145966][ T76] __kmalloc_cache_noprof+0x40/0x6f0 [ 77.148792][ T76] assoc_array_insert+0x92/0x2f90 [ 77.151446][ T76] __key_link_begin+0xd6/0x1f0 [ 77.153647][ T76] __key_create_or_update+0x41a/0xa30 [ 77.156005][ T76] key_create_or_update+0x42/0x60 [ 77.158253][ T76] x509_load_certificate_list+0x145/0x280 [ 77.160847][ T76] do_one_initcall+0x236/0x820 [ 77.163065][ T76] do_initcall_level+0x104/0x190 [ 77.165269][ T76] do_initcalls+0x59/0xa0 [ 77.167404][ T76] kernel_init_freeable+0x334/0x4b0 [ 77.169965][ T76] kernel_init+0x1d/0x1d0 [ 77.172226][ T76] ret_from_fork+0x4bc/0x870 [ 77.174518][ T76] ret_from_fork_asm+0x1a/0x30 [ 77.176877][ T76] [ 77.176877][ T76] -> #0 (&type->lock_class){+.+.}-{4:4}: [ 77.180432][ T76] validate_chain+0xb9b/0x2140 [ 77.182862][ T76] __lock_acquire+0xab9/0xd20 [ 77.185040][ T76] lock_acquire+0x120/0x360 [ 77.187261][ T76] down_write+0x96/0x1f0 [ 77.189368][ T76] keyring_clear+0xaf/0x240 [ 77.191839][ T76] fscrypt_put_master_key+0xca/0x190 [ 77.194561][ T76] put_crypt_info+0x26d/0x310 [ 77.197034][ T76] fscrypt_put_encryption_info+0xf6/0x140 [ 77.199851][ T76] ext4_clear_inode+0x170/0x2f0 [ 77.202234][ T76] ext4_evict_inode+0xa67/0xee0 [ 77.204595][ T76] evict+0x504/0x9c0 [ 77.206658][ T76] __dentry_kill+0x209/0x660 [ 77.208819][ T76] shrink_kill+0xa9/0x2c0 [ 77.210762][ T76] shrink_dentry_list+0x2e0/0x5e0 [ 77.213186][ T76] prune_dcache_sb+0x10e/0x180 [ 77.215613][ T76] super_cache_scan+0x369/0x4b0 [ 77.217964][ T76] do_shrink_slab+0x6ef/0x1110 [ 77.220298][ T76] shrink_slab+0x7ef/0x10d0 [ 77.222664][ T76] shrink_one+0x28a/0x7c0 [ 77.225099][ T76] shrink_node+0x315d/0x3780 [ 77.227490][ T76] kswapd+0x147c/0x2800 [ 77.229765][ T76] kthread+0x711/0x8a0 [ 77.231918][ T76] ret_from_fork+0x4bc/0x870 [ 77.234275][ T76] ret_from_fork_asm+0x1a/0x30 [ 77.236583][ T76] [ 77.236583][ T76] other info that might help us debug this: [ 77.236583][ T76] [ 77.241163][ T76] Possible unsafe locking scenario: [ 77.241163][ T76] [ 77.244130][ T76] CPU0 CPU1 [ 77.246378][ T76] ---- ---- [ 77.248656][ T76] lock(fs_reclaim); [ 77.250315][ T76] lock(&type->lock_class); [ 77.253224][ T76] lock(fs_reclaim); [ 77.255983][ T76] lock(&type->lock_class); [ 77.257983][ T76] [ 77.257983][ T76] *** DEADLOCK *** [ 77.257983][ T76] [ 77.261504][ T76] 2 locks held by kswapd0/76: [ 77.263532][ T76] #0: ffffffff8e047c40 (fs_reclaim){+.+.}-{0:0}, at: kswapd+0x951/0x2800 [ 77.267291][ T76] #1: ffff8880116c80e0 (&type->s_umount_key#31){++++}-{4:4}, at: super_cache_scan+0x91/0x4b0 [ 77.271688][ T76] [ 77.271688][ T76] stack backtrace: [ 77.274234][ T76] CPU: 0 UID: 0 PID: 76 Comm: kswapd0 Not tainted syzkaller #0 PREEMPT(full) [ 77.274249][ T76] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 77.274256][ T76] Call Trace: [ 77.274264][ T76] [ 77.274270][ T76] dump_stack_lvl+0x189/0x250 [ 77.274288][ T76] ? __pfx_dump_stack_lvl+0x10/0x10 [ 77.274302][ T76] ? __pfx__printk+0x10/0x10 [ 77.274312][ T76] ? print_lock_name+0xde/0x100 [ 77.274322][ T76] print_circular_bug+0x2ee/0x310 [ 77.274335][ T76] check_noncircular+0x134/0x160 [ 77.274348][ T76] validate_chain+0xb9b/0x2140 [ 77.274363][ T76] __lock_acquire+0xab9/0xd20 [ 77.274373][ T76] ? keyring_clear+0xaf/0x240 [ 77.274386][ T76] lock_acquire+0x120/0x360 [ 77.274395][ T76] ? keyring_clear+0xaf/0x240 [ 77.274410][ T76] down_write+0x96/0x1f0 [ 77.274423][ T76] ? keyring_clear+0xaf/0x240 [ 77.274435][ T76] ? __pfx_down_write+0x10/0x10 [ 77.274450][ T76] keyring_clear+0xaf/0x240 [ 77.274463][ T76] ? __pfx_keyring_clear+0x10/0x10 [ 77.274478][ T76] fscrypt_put_master_key+0xca/0x190 [ 77.274490][ T76] put_crypt_info+0x26d/0x310 [ 77.274502][ T76] fscrypt_put_encryption_info+0xf6/0x140 [ 77.274514][ T76] ext4_clear_inode+0x170/0x2f0 [ 77.274531][ T76] ext4_evict_inode+0xa67/0xee0 [ 77.274543][ T76] ? inode_wait_for_writeback+0xf9/0x290 [ 77.274553][ T76] ? __pfx_inode_wait_for_writeback+0x10/0x10 [ 77.274563][ T76] ? __pfx_ext4_evict_inode+0x10/0x10 [ 77.274575][ T76] ? do_raw_spin_unlock+0x4d/0x240 [ 77.274588][ T76] ? __pfx_ext4_evict_inode+0x10/0x10 [ 77.274599][ T76] evict+0x504/0x9c0 [ 77.274611][ T76] ? __pfx_evict+0x10/0x10 [ 77.274621][ T76] ? _raw_spin_unlock+0x28/0x50 [ 77.274630][ T76] ? iput+0x946/0xc50 [ 77.274644][ T76] __dentry_kill+0x209/0x660 [ 77.274658][ T76] ? shrink_kill+0x8d/0x2c0 [ 77.274671][ T76] shrink_kill+0xa9/0x2c0 [ 77.274684][ T76] shrink_dentry_list+0x2e0/0x5e0 [ 77.274699][ T76] prune_dcache_sb+0x10e/0x180 [ 77.274712][ T76] ? __pfx_prune_dcache_sb+0x10/0x10 [ 77.274726][ T76] ? list_lru_count_one+0x27/0x2c0 [ 77.274740][ T76] ? list_lru_count_one+0x264/0x2c0 [ 77.274753][ T76] super_cache_scan+0x369/0x4b0 [ 77.274767][ T76] do_shrink_slab+0x6ef/0x1110 [ 77.274779][ T76] shrink_slab+0x7ef/0x10d0 [ 77.274789][ T76] ? shrink_slab+0x1e8/0x10d0 [ 77.274798][ T76] ? __pfx_shrink_slab+0x10/0x10 [ 77.274809][ T76] shrink_one+0x28a/0x7c0 [ 77.274825][ T76] ? shrink_node+0x2f1f/0x3780 [ 77.274838][ T76] shrink_node+0x315d/0x3780 [ 77.274853][ T76] ? shrink_node+0x2f1f/0x3780 [ 77.274868][ T76] ? __lock_acquire+0xab9/0xd20 [ 77.274879][ T76] ? percpu_ref_put+0x19/0x180 [ 77.274894][ T76] ? __pfx_shrink_node+0x10/0x10 [ 77.274907][ T76] ? percpu_ref_put+0x19/0x180 [ 77.274921][ T76] ? mem_cgroup_iter+0x420/0x460 [ 77.274931][ T76] ? mem_cgroup_iter+0x3b/0x460 [ 77.274940][ T76] kswapd+0x147c/0x2800 [ 77.274954][ T76] ? kswapd+0x951/0x2800 [ 77.274966][ T76] ? __pfx_kswapd+0x10/0x10 [ 77.274977][ T76] ? __lock_acquire+0xab9/0xd20 [ 77.274991][ T76] ? _raw_spin_unlock_irqrestore+0xad/0x110 [ 77.275001][ T76] ? _raw_spin_lock_bh+0x20/0x50 [ 77.275011][ T76] ? __pfx_autoremove_wake_function+0x10/0x10 [ 77.275024][ T76] ? __pfx_set_cpus_allowed_ptr+0x10/0x10 [ 77.275037][ T76] ? __kthread_parkme+0x7b/0x200 [ 77.275048][ T76] ? __kthread_parkme+0x1a1/0x200 [ 77.275060][ T76] kthread+0x711/0x8a0 [ 77.275073][ T76] ? __pfx_kswapd+0x10/0x10 [ 77.275082][ T76] ? __pfx_kthread+0x10/0x10 [ 77.275095][ T76] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.275105][ T76] ? lockdep_hardirqs_on+0x9c/0x150 [ 77.275115][ T76] ? __pfx_kthread+0x10/0x10 [ 77.275127][ T76] ret_from_fork+0x4bc/0x870 [ 77.275138][ T76] ? __pfx_ret_from_fork+0x10/0x10 [ 77.275149][ T76] ? __pfx_kthread+0x10/0x10 [ 77.275160][ T76] ret_from_fork_asm+0x1a/0x30 [ 77.275172][ T76]