loop0: detected capacity change from 0 to 32768 bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=crc64,data_checksum=none,compression=lz4,journal_flush_disabled,fsck,fix_errors=no,norecovery,nojournal_transaction_names,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 1.13: inode_has_child_snapshots 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 bch2_btree_node_read_done+0xfbe/0x5e90 fs/bcachefs/btree_io.c:1087 Read of size 8 at addr ffff888045142010 by task syz.0.0/5321 CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted 6.13.0-rc4-syzkaller-00012-g9b2ffa6148b1 #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:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 bch2_btree_node_read_done+0xfbe/0x5e90 fs/bcachefs/btree_io.c:1087 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1323 bch2_btree_node_read+0x2433/0x29f0 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline] bch2_btree_root_read+0x617/0x7a0 fs/bcachefs/btree_io.c:1771 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523 bch2_fs_recovery+0x2585/0x39d0 fs/bcachefs/recovery.c:853 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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: 0033:0x7f26ffd874ca 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:00007f2700c01e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2700c01ef0 RCX: 00007f26ffd874ca RDX: 00000000200000c0 RSI: 0000000020000000 RDI: 00007f2700c01eb0 RBP: 00000000200000c0 R08: 00007f2700c01ef0 R09: 0000000001800000 R10: 0000000001800000 R11: 0000000000000246 R12: 0000000020000000 R13: 00007f2700c01eb0 R14: 000000000000599f R15: 0000000020005d40 Allocated by task 5321: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_node_noprof+0x290/0x4d0 mm/slub.c:4304 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650 btree_node_data_alloc+0xdb/0x260 fs/bcachefs/btree_cache.c:153 __bch2_btree_node_mem_alloc+0x1d8/0x3e0 fs/bcachefs/btree_cache.c:198 bch2_fs_btree_cache_init+0x26f/0x630 fs/bcachefs/btree_cache.c:653 bch2_fs_alloc fs/bcachefs/super.c:917 [inline] bch2_fs_open+0x2aa4/0x2f80 fs/bcachefs/super.c:2065 bch2_fs_get_tree+0x738/0x1710 fs/bcachefs/fs.c:2157 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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 ffff888045140000 which belongs to the cache kmalloc-rcl-8k of size 8192 The buggy address is located 16 bytes to the right of allocated 8192-byte region [ffff888045140000, ffff888045142000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x45140 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888033286261 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff88801ac4c3c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080020002 00000001f5000000 ffff888033286261 head: 04fff00000000040 ffff88801ac4c3c0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080020002 00000001f5000000 ffff888033286261 head: 04fff00000000003 ffffea0001145001 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd20d0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 5321, tgid 5320 (syz.0.0), ts 69506339769, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3476 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 alloc_slab_page+0x6a/0x110 mm/slub.c:2423 allocate_slab+0x5a/0x2b0 mm/slub.c:2589 new_slab mm/slub.c:2642 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3830 __slab_alloc+0x58/0xa0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4304 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650 btree_node_data_alloc+0xdb/0x260 fs/bcachefs/btree_cache.c:153 __bch2_btree_node_mem_alloc+0x1d8/0x3e0 fs/bcachefs/btree_cache.c:198 bch2_fs_btree_cache_init+0x26f/0x630 fs/bcachefs/btree_cache.c:653 bch2_fs_alloc fs/bcachefs/super.c:917 [inline] bch2_fs_open+0x2aa4/0x2f80 fs/bcachefs/super.c:2065 bch2_fs_get_tree+0x738/0x1710 fs/bcachefs/fs.c:2157 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 page_owner free stack trace missing Memory state around the buggy address: ffff888045141f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888045141f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888045142000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888045142080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888045142100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================