Hello, Just try the latest linus tree by running `rublk` builtin test on Fedora, and found the following panic: git clone https://github.com/ublk-org/rublk cd rublk cargo test [ 24.153674] BTRFS: device fsid b99703ee-349d-40fa-b3d6-b5b451f979ab devid 1 transid 8 /dev/ublkb1 (259:3) scanned by moun) [ 24.154624] BTRFS info (device ublkb1): first mount of filesystem b99703ee-349d-40fa-b3d6-b5b451f979ab [ 24.155123] BTRFS info (device ublkb1): using crc32c (crc32c-x86) checksum algorithm [ 24.155777] BTRFS info (device ublkb1): using free-space-tree [ 24.157502] BTRFS info (device ublkb1): host-managed zoned block device /dev/ublkb1, 256 zones of 4194304 bytes [ 24.158503] BTRFS info (device ublkb1): zoned mode enabled with zone size 4194304 [ 24.159541] BTRFS info (device ublkb1): checking UUID tree [ 24.166324] EXT4-fs (ublkb5): mounted filesystem ae8f9776-4cb7-4edd-9acd-44291433e146 r/w with ordered data mode. Quota mode: none. [ 24.169139] EXT4-fs (ublkb8): mounted filesystem 4beadbbc-d9c3-484d-b37b-8ea7ceb4cade r/w with ordered data mode. Quota mode: none. [ 24.171259] EXT4-fs (ublkb5): unmounting filesystem ae8f9776-4cb7-4edd-9acd-44291433e146. [ 24.173862] EXT4-fs (ublkb8): unmounting filesystem 4beadbbc-d9c3-484d-b37b-8ea7ceb4cade. [ 24.336068] ------------[ cut here ]------------ [ 24.336449] kernel BUG at fs/btrfs/extent_io.c:2776! [ 24.336786] Oops: invalid opcode: 0000 [#1] SMP NOPTI [ 24.337064] CPU: 7 UID: 0 PID: 119 Comm: kworker/u64:2 Not tainted 6.15.0+ #279 PREEMPT(full) [ 24.337530] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-1.fc39 04/01/2014 [ 24.337985] Workqueue: writeback wb_workfn (flush-btrfs-2) [ 24.338293] RIP: 0010:detach_extent_buffer_folio+0xca/0xd0 [ 24.338595] Code: 4d 34 74 18 84 db 74 96 4d 8d 75 7c 5b 4c 89 f7 5d 41 5c 41 5d 41 5e e9 54 f7 aa 00 48 89 ef e8 8c 48 d0 ff eb de 0f 0b0 [ 24.339599] RSP: 0018:ffffd34500477880 EFLAGS: 00010202 [ 24.339887] RAX: 0017ffffc000400a RBX: 0000000000000001 RCX: ffffd34500477838 [ 24.340280] RDX: 0000000000000001 RSI: fffff5a2442fb280 RDI: ffff8bf88590ef74 [ 24.340697] RBP: fffff5a2442fb280 R08: 0000000000000024 R09: 0000000000000000 [ 24.341143] R10: 0000000000000001 R11: ffff8bf896b39500 R12: ffff8bf88de8cd20 [ 24.341597] R13: ffff8bf88590eef8 R14: ffff8bf88590ef74 R15: ffffd34500477970 [ 24.342106] FS: 0000000000000000(0000) GS:ffff8bfd3ffb6000(0000) knlGS:0000000000000000 [ 24.342739] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.343087] CR2: 00007f55e0cdff10 CR3: 00000002af824002 CR4: 0000000000772ef0 [ 24.343504] PKRU: 55555554 [ 24.343667] Call Trace: [ 24.343823] <TASK> [ 24.343956] release_extent_buffer+0x9b/0xd0 [ 24.344209] btree_write_cache_pages+0x1de/0x590 [ 24.344486] do_writepages+0xc8/0x170 [ 24.344707] __writeback_single_inode+0x41/0x340 [ 24.344979] writeback_sb_inodes+0x21b/0x4e0 [ 24.345234] wb_writeback+0x98/0x330 [ 24.345449] wb_workfn+0xc2/0x450 [ 24.345648] ? try_to_wake_up+0x308/0x740 [ 24.346052] process_one_work+0x188/0x340 [ 24.346445] worker_thread+0x257/0x3a0 [ 24.346811] ? __pfx_worker_thread+0x10/0x10 [ 24.347206] kthread+0xfc/0x240 [ 24.347560] ? __pfx_kthread+0x10/0x10 [ 24.347924] ret_from_fork+0x34/0x50 [ 24.348284] ? __pfx_kthread+0x10/0x10 [ 24.348672] ret_from_fork_asm+0x1a/0x30 [ 24.349046] </TASK> [ 24.349344] Modules linked in: iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi target_core_pscsi target_core_file target_core_iblockg [ 24.353785] Dumping ftrace buffer: [ 24.354170] (ftrace buffer empty) [ 24.354584] ---[ end trace 0000000000000000 ]--- [ 24.355021] RIP: 0010:detach_extent_buffer_folio+0xca/0xd0 [ 24.355525] Code: 4d 34 74 18 84 db 74 96 4d 8d 75 7c 5b 4c 89 f7 5d 41 5c 41 5d 41 5e e9 54 f7 aa 00 48 89 ef e8 8c 48 d0 ff eb de 0f 0b0 [ 24.357039] RSP: 0018:ffffd34500477880 EFLAGS: 00010202 [ 24.357571] RAX: 0017ffffc000400a RBX: 0000000000000001 RCX: ffffd34500477838 [ 24.358183] RDX: 0000000000000001 RSI: fffff5a2442fb280 RDI: ffff8bf88590ef74 [ 24.358807] RBP: fffff5a2442fb280 R08: 0000000000000024 R09: 0000000000000000 [ 24.359443] R10: 0000000000000001 R11: ffff8bf896b39500 R12: ffff8bf88de8cd20 [ 24.360070] R13: ffff8bf88590eef8 R14: ffff8bf88590ef74 R15: ffffd34500477970 [ 24.360746] FS: 0000000000000000(0000) GS:ffff8bfd3ffb6000(0000) knlGS:0000000000000000 [ 24.361451] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.362055] CR2: 00007f55e0cdff10 CR3: 00000002af824002 CR4: 0000000000772ef0 [ 24.362812] PKRU: 55555554 [ 24.363145] Kernel panic - not syncing: Fatal exception [ 24.363845] Dumping ftrace buffer: [ 24.364213] (ftrace buffer empty) [ 24.364602] Kernel Offset: 0x27000000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 24.365385] ---[ end Kernel panic - not syncing: Fatal exception ]--- Thanks,
