netlink: 8 bytes leftover after parsing attributes in process `syz.0.0'. loop0: detected capacity change from 0 to 32768 bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=ro,metadata_checksum=xxhash,data_checksum=none,compression=lz4,usrquota,no_splitbrain_check,read_only,reconstruct_alloc,version_upgrade=incompatible bcachefs (loop0): recovering from clean shutdown, journal seq 10 bcachefs (loop0): Version upgrade from 1.13: inode_has_child_snapshots to 1.7: mi_btree_bitmap incomplete Doing compatible version upgrade from 1.13: inode_has_child_snapshots to 1.25: extent_flags running recovery passes: check_allocations,check_extents_to_backpointers bcachefs (loop0): Now allowing incompatible features up to 1.25: extent_flags, previously allowed up to 0.0: (unknown version) syz.0.0: attempt to access beyond end of device loop0: rw=6144, sector=18446744073709551615, nr_sectors = 8 limit=32768 bcachefs (loop0): superblock read error: I/O bcachefs (loop0): bch2_write_super(): fatal error : Unable to write superblock to sufficient devices (from bch2_fs_recovery) bcachefs (loop0): fatal error - emergency read only bcachefs (loop0): dropping and reconstructing all alloc info syz.0.0: attempt to access beyond end of device loop0: rw=6144, sector=18446744073709551615, nr_sectors = 8 limit=32768 bcachefs (loop0): superblock read error: I/O bcachefs (loop0): bch2_write_super(): fatal error : Unable to write superblock to sufficient devices (from bch2_reconstruct_alloc) bcachefs (loop0): error validating btree node on loop0 at btree extents level 0/0 u64s 11 type btree_ptr_v2 18446744073707239423:U64_MAX:U32_MAX len 0 ver 0: seq c6c25c03258c59c5 written 16 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0 node offset 0/16 bset u64s 0: incorrect max key SPOS_MAX bcachefs (loop0): running explicit recovery pass check_topology (2), currently at recovery_pass_empty (0) bcachefs (loop0): flagging btree extents lost data bcachefs (loop0): running explicit recovery pass check_backpointers_to_extents (16), currently at recovery_pass_empty (0) bcachefs (loop0): running explicit recovery pass scan_for_btree_nodes (1), currently at recovery_pass_empty (0) syz.0.0: attempt to access beyond end of device loop0: rw=6144, sector=18446744073709551615, nr_sectors = 8 limit=32768 bcachefs (loop0): superblock read error: I/O bcachefs (loop0): bch2_write_super(): fatal error : Unable to write superblock to sufficient devices (from bch2_btree_lost_data) error reading btree root btree=extents level=0: btree_node_read_error, fixing syz.0.0: attempt to access beyond end of device loop0: rw=6144, sector=18446744073709551615, nr_sectors = 8 limit=32768 bcachefs (loop0): superblock read error: I/O bcachefs (loop0): bch2_write_super(): fatal error : Unable to write superblock to sufficient devices (from bch2_btree_lost_data) bcachefs (loop0): pointer to nonexistent device 7 ------------[ cut here ]------------ unhandled error case in bch2_bkey_pick_read_device WARNING: CPU: 0 PID: 5319 at fs/bcachefs/extents.c:230 bch2_bkey_pick_read_device+0x17a5/0x1a00 fs/bcachefs/extents.c:230 Modules linked in: CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-10514-g7f2ff7b62617 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:bch2_bkey_pick_read_device+0x17a5/0x1a00 fs/bcachefs/extents.c:230 Code: a1 84 57 fd e9 d0 fd ff ff e8 97 84 57 fd c6 05 95 39 dd 0b 01 90 48 c7 c7 a0 a9 93 8c 48 c7 c6 17 c2 5a 8e e8 4c 8f 16 fd 90 <0f> 0b 90 90 e9 bc fe ff ff e8 6d 84 57 fd e9 6e ff ff ff 89 d9 80 RSP: 0018:ffffc9000d4cede0 EFLAGS: 00010246 RAX: b8717d98e0995f00 RBX: 0000000000000000 RCX: ffff88801f32c880 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000d4cf010 R08: ffffffff81827862 R09: 1ffff11003f847d2 R10: dffffc0000000000 R11: ffffed1003f847d3 R12: dffffc0000000000 R13: 1ffff92001a99de4 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fa696f416c0(0000) GS:ffff88808c5b7000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055a7932eb0e0 CR3: 000000003a996000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_btree_node_read+0x7ac/0x29e0 fs/bcachefs/btree_io.c:1705 __bch2_btree_root_read fs/bcachefs/btree_io.c:1795 [inline] bch2_btree_root_read+0x656/0x7e0 fs/bcachefs/btree_io.c:1817 read_btree_roots+0x3d7/0xa80 fs/bcachefs/recovery.c:581 bch2_fs_recovery+0x28e4/0x3e20 fs/bcachefs/recovery.c:928 bch2_fs_start+0x37c/0x620 fs/bcachefs/super.c:1057 bch2_fs_get_tree+0x1270/0x18d0 fs/bcachefs/fs.c:2253 vfs_get_tree+0x90/0x2b0 fs/super.c:1759 do_new_mount+0x2cf/0xb70 fs/namespace.c:3878 do_mount fs/namespace.c:4218 [inline] __do_sys_mount fs/namespace.c:4429 [inline] __se_sys_mount+0x38c/0x400 fs/namespace.c:4406 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa69618e90a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fa696f40e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fa696f40ef0 RCX: 00007fa69618e90a RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 00007fa696f40eb0 RBP: 00002000000000c0 R08: 00007fa696f40ef0 R09: 0000000000800001 R10: 0000000000800001 R11: 0000000000000246 R12: 0000200000000000 R13: 00007fa696f40eb0 R14: 00000000000059b2 R15: 0000200000005b40