Commit 8c37f7c23c02f6ac020ffdc746026c2363b23a5a ( workqueue: Try to catch flush_work() without INIT_WORK().) causes the following warning when mounting encrypted filesystems: May 3 21:29:33 pc-francois kernel: [ 20.202934] WARNING: CPU: 1 PID: 1719 at kernel/workqueue.c:2911 __flush_work+0x1a4/0x1c0 May 3 21:29:33 pc-francois kernel: [ 20.205470] Modules linked in: uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videodev videobuf2_common arc4 rtl8188ee rtl_pci rtlwifi mac80211 cfg80211 snd_hda_codec_hdmi alx mdio psmou se snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_pcm snd_timer snd soundcore evdev coretemp battery nls_utf8 nls_cp850 efivars vfat fat ac hwmon vboxpci(O) vboxnetadp(O) vboxnetflt(O) vboxdrv(O) nbd kvm_intel nfsd au th_rpcgss kvm irqbypass dm_thin_pool dm_persistent_data dm_bio_prison dm_round_robin dm_multipath xts cbc fuse xfs nfs lockd grace sunrpc btrfs xor zstd_decompress zstd_compress xxhash raid6_pq crc32c_generic libcrc32c zlib_inflate ext4 mbcache jbd2 dm_snapshot dm_bufio dm_crypt dm_mirror dm_region_hash dm_log dm_mod dax ohci_hcd sr_mod sd_mod cdrom usb_storage hid_generic May 3 21:29:33 pc-francois kernel: [ 20.218000] usbhid hid xhci_pci aesni_intel aes_x86_64 crypto_simd cryptd glue_helper ehci_pci ahci xhci_hcd ehci_hcd libahci usbcore usb_common May 3 21:29:33 pc-francois kernel: [ 20.220780] CPU: 1 PID: 1719 Comm: systemd-cryptse Tainted: G W O 4.19.39-rc1 #41 May 3 21:29:33 pc-francois kernel: [ 20.223587] Hardware name: TOSHIBA SATELLITE C70-A/Type2 - Board Product Name1, BIOS 1.00 04/30/2013 May 3 21:29:33 pc-francois kernel: [ 20.226435] RIP: 0010:__flush_work+0x1a4/0x1c0 May 3 21:29:33 pc-francois kernel: [ 20.229285] Code: 20 e9 f8 fe ff ff fb 31 c0 eb 8e 8b 4d 00 48 8b 55 08 83 e1 08 48 0f ba 6d 00 03 80 c9 f0 e9 54 ff ff ff 0f 0b e9 6f ff ff ff <0f> 0b 31 c0 e9 66 ff ff ff e8 7e 8b fe ff 66 66 2e 0 f 1f 84 00 00 May 3 21:29:33 pc-francois kernel: [ 20.235471] RSP: 0018:ffff956f8033fb50 EFLAGS: 00010246 May 3 21:29:33 pc-francois kernel: [ 20.238618] RAX: 0000000000000000 RBX: ffff8ff5bce9b9d0 RCX: 0000000000000000 May 3 21:29:33 pc-francois kernel: [ 20.241801] RDX: 0000000000000001 RSI: 0000000000000001 RDI: ffff8ff5bce9b9d0 May 3 21:29:33 pc-francois kernel: [ 20.244991] RBP: ffff8ff5bce9b9d0 R08: 0000000000000050 R09: ffff8ff5c3019380 May 3 21:29:33 pc-francois kernel: [ 20.248178] R10: 0000000000000ab8 R11: ffff8ff5c305e688 R12: 0000000000000000 May 3 21:29:33 pc-francois kernel: [ 20.251389] R13: ffff956f8033fbe8 R14: ffffffff8c0609f0 R15: ffff956f8033fd08 May 3 21:29:33 pc-francois kernel: [ 20.254624] FS: 00007feaa0d15840(0000) GS:ffff8ff5c3040000(0000) knlGS:0000000000000000 May 3 21:29:33 pc-francois kernel: [ 20.257908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 May 3 21:29:33 pc-francois kernel: [ 20.261198] CR2: 00007f9316ec25a0 CR3: 000000033cf8c003 CR4: 00000000001606a0 May 3 21:29:33 pc-francois kernel: [ 20.264520] Call Trace: May 3 21:29:33 pc-francois kernel: [ 20.267837] ? _raw_spin_unlock_irq+0xe/0x20 May 3 21:29:33 pc-francois kernel: [ 20.271173] ? finish_task_switch+0x8a/0x2a0 May 3 21:29:33 pc-francois kernel: [ 20.274499] ? __switch_to+0x2e/0x380 May 3 21:29:33 pc-francois kernel: [ 20.277820] ? __switch_to_asm+0x34/0x70 May 3 21:29:33 pc-francois kernel: [ 20.281136] __cancel_work_timer+0xfe/0x180 May 3 21:29:33 pc-francois kernel: [ 20.284315] ? remove_all+0x30/0x30 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.287332] ? _raw_spin_unlock_irqrestore+0xf/0x30 May 3 21:29:33 pc-francois kernel: [ 20.290326] ? remove_all+0x30/0x30 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.293300] blk_sync_queue+0x1d/0x80 May 3 21:29:33 pc-francois kernel: [ 20.296253] blk_cleanup_queue+0xc0/0x140 May 3 21:29:33 pc-francois kernel: [ 20.299198] cleanup_mapped_device+0xc3/0x100 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.302158] free_dev+0x38/0xa0 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.305113] ? remove_all+0x30/0x30 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.308044] dev_remove+0xce/0x110 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.310961] ctl_ioctl+0x1a7/0x3a0 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.313881] dm_ctl_ioctl+0x5/0x10 [dm_mod] May 3 21:29:33 pc-francois kernel: [ 20.316810] do_vfs_ioctl+0xa0/0x610 May 3 21:29:33 pc-francois kernel: [ 20.319738] ? ksys_semctl+0x124/0x160 May 3 21:29:33 pc-francois kernel: [ 20.322674] ? preempt_count_add+0x74/0xa0 May 3 21:29:33 pc-francois kernel: [ 20.325628] ksys_ioctl+0x35/0x70 May 3 21:29:33 pc-francois kernel: [ 20.328586] __x64_sys_ioctl+0x11/0x20 May 3 21:29:33 pc-francois kernel: [ 20.331536] do_syscall_64+0x43/0xf0 May 3 21:29:33 pc-francois kernel: [ 20.334493] entry_SYSCALL_64_after_hwframe+0x44/0xa9 May 3 21:29:33 pc-francois kernel: [ 20.337478] RIP: 0033:0x7feaa2d10b17 May 3 21:29:33 pc-francois kernel: [ 20.340462] Code: 00 00 00 75 0c 48 c7 c0 ff ff ff ff 48 83 c4 18 c3 e8 7d e1 01 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 49 b3 0c 00 f7 d8 64 89 01 48 May 3 21:29:33 pc-francois kernel: [ 20.346929] RSP: 002b:00007ffc4e75db58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 May 3 21:29:33 pc-francois kernel: [ 20.350202] RAX: ffffffffffffffda RBX: 00007feaa15156e0 RCX: 00007feaa2d10b17 May 3 21:29:33 pc-francois kernel: [ 20.353493] RDX: 00005585e2127a80 RSI: 00000000c138fd04 RDI: 0000000000000004 May 3 21:29:33 pc-francois kernel: [ 20.356793] RBP: 00007feaa154f4c3 R08: 000000000000005f R09: 00005585e2103ec0 May 3 21:29:33 pc-francois kernel: [ 20.360101] R10: 00007feaa2d9ef80 R11: 0000000000000246 R12: 00005585e2127a80 May 3 21:29:33 pc-francois kernel: [ 20.363363] R13: 0000000000000001 R14: 00005585e2127b30 R15: 00005585e2103650 May 3 21:29:33 pc-francois kernel: [ 20.366616] ---[ end trace 170b245abe91a71f ]--- May 3 21:29:33 pc-francois kernel: [ 21.000999] EXT4-fs (dm-14): mounted filesystem with ordered data mode. Opts: (null) Finally If I revert this commit, the problem doesn't occur. I am using filesystems encrypted with luks formatted with ext4. The filesystems are on LVM volumes. Does anybody have an idea about this problem ? Thanks in advance for your help, François Valenduc
