loop0: detected capacity change from 0 to 32768 bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,journal_flush_disabled,reconstruct_alloc bcachefs (loop0): recovering from clean shutdown, journal seq 10 bcachefs (loop0): Version upgrade required: Version upgrade from 0.24: unwritten_extents to 1.7: mi_btree_bitmap incomplete Doing incompatible version upgrade from 0.24: unwritten_extents to 1.20: directory_size running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_unreachable_inodes,check_subvolume_structure,check_directory_structure,check_nlinks,set_fs_needs_rebalance bcachefs (loop0): dropping and reconstructing all alloc info ================================================================== BUG: KASAN: slab-out-of-bounds in crc64_be+0x131/0x1f0 lib/crc64.c:58 Read of size 1 at addr ffff8880555e0498 by task syz.0.0/5323 CPU: 0 UID: 0 PID: 5323 Comm: syz.0.0 Not tainted 6.14.0-rc5-syzkaller-00137-g00a7d39898c8 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 crc64_be+0x131/0x1f0 lib/crc64.c:58 bch2_checksum_update+0x10f/0x160 fs/bcachefs/checksum.c:89 bch2_checksum+0x37e/0x780 fs/bcachefs/checksum.c:226 bch2_btree_node_read_done+0x155c/0x6180 fs/bcachefs/btree_io.c:1100 btree_node_read_work+0x6dc/0x1380 fs/bcachefs/btree_io.c:1358 bch2_btree_node_read+0x2433/0x29f0 __bch2_btree_root_read fs/bcachefs/btree_io.c:1789 [inline] bch2_btree_root_read+0x626/0x7b0 fs/bcachefs/btree_io.c:1811 read_btree_roots+0x3d3/0xa70 fs/bcachefs/recovery.c:581 bch2_fs_recovery+0x260f/0x3de0 fs/bcachefs/recovery.c:928 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1041 bch2_fs_get_tree+0xdb7/0x17a0 fs/bcachefs/fs.c:2203 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f903e18e90a 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:00007f903efb8e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f903efb8ef0 RCX: 00007f903e18e90a RDX: 00004000000000c0 RSI: 0000400000000000 RDI: 00007f903efb8eb0 RBP: 00004000000000c0 R08: 00007f903efb8ef0 R09: 000000000100000a R10: 000000000100000a R11: 0000000000000246 R12: 0000400000000000 R13: 00007f903efb8eb0 R14: 0000000000005956 R15: 0000400000000100 Allocated by task 5323: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_lru_noprof+0x1dd/0x390 mm/slub.c:4183 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x14c/0x500 fs/debugfs/inode.c:447 debugfs_create_file_full+0x40/0x60 fs/debugfs/inode.c:474 bch2_fs_debug_btree_init fs/bcachefs/debug.c:895 [inline] bch2_fs_debug_init+0x38d/0x450 fs/bcachefs/debug.c:938 bch2_fs_online+0x28e/0x860 fs/bcachefs/super.c:712 bch2_fs_alloc fs/bcachefs/super.c:955 [inline] bch2_fs_open+0x3175/0x31e0 fs/bcachefs/super.c:2064 bch2_fs_get_tree+0x738/0x17a0 fs/bcachefs/fs.c:2190 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3560 do_mount fs/namespace.c:3900 [inline] __do_sys_mount fs/namespace.c:4111 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880555e0000 which belongs to the cache debugfs_inode_cache of size 1176 The buggy address is located 0 bytes to the right of allocated 1176-byte region [ffff8880555e0000, ffff8880555e0498) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x555e0 head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888052323001 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801bbcc640 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000000f5000000 ffff888052323001 head: 04fff00000000040 ffff88801bbcc640 dead000000000122 0000000000000000 head: 0000000000000000 00000000000c000c 00000000f5000000 ffff888052323001 head: 04fff00000000002 ffffea0001557801 ffffffffffffffff 0000000000000000 head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5323, tgid 5322 (syz.0.0), ts 68594741163, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_lru_noprof+0x26c/0x390 mm/slub.c:4183 alloc_inode+0x65/0x1a0 fs/inode.c:336 new_inode_pseudo fs/inode.c:1174 [inline] new_inode+0x22/0x1d0 fs/inode.c:1193 debugfs_get_inode fs/debugfs/inode.c:72 [inline] __debugfs_create_file+0x14c/0x500 fs/debugfs/inode.c:447 debugfs_create_file_full+0x40/0x60 fs/debugfs/inode.c:474 bch2_fs_debug_btree_init fs/bcachefs/debug.c:895 [inline] bch2_fs_debug_init+0x38d/0x450 fs/bcachefs/debug.c:938 bch2_fs_online+0x28e/0x860 fs/bcachefs/super.c:712 bch2_fs_alloc fs/bcachefs/super.c:955 [inline] bch2_fs_open+0x3175/0x31e0 fs/bcachefs/super.c:2064 bch2_fs_get_tree+0x738/0x17a0 fs/bcachefs/fs.c:2190 page_owner free stack trace missing Memory state around the buggy address: ffff8880555e0380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880555e0400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880555e0480: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff8880555e0500: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880555e0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================