loop0: detected capacity change from 0 to 32768 bcachefs (/dev/loop0): error reading default superblock: checksum error, type none: got should be bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=errors=continue,metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names bcachefs (loop0): recovering from clean shutdown, journal seq 10 bcachefs (loop0): superblock requires following recovery passes to be run: check_inodes,check_extents,check_dirents bcachefs (loop0): Doing compatible version upgrade from 1.7: mi_btree_bitmap to 1.20: directory_size running recovery passes: check_allocations,check_extents_to_backpointers bcachefs (loop0): accounting_read... done bcachefs (loop0): alloc_read... done bcachefs (loop0): stripes_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): check_allocations... btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ac62141f8dc7e261 written 24 min_key POS_MIN durability: 1 ptr: 0:26:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 9aa2895aefce4bdf written 24 min_key POS_MIN durability: 1 ptr: 0:41:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c0bef60d07ceb940 written 16 min_key POS_MIN durability: 1 ptr: 0:35:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq ebb8d5a9e3463bdb written 16 min_key POS_MIN durability: 1 ptr: 0:32:0 gen 0, fixing btree ptr not marked in member info btree allocated bitmap u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq e81e1ed936acf3df written 32 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing bucket 0:38 gen 0 has wrong data_type: got btree, should be need_discard, fixing bucket 0:38 gen 0 data type need_discard has wrong dirty_sectors: got 256, should be 0, fixing done bcachefs (loop0): going read-write bcachefs (loop0): journal_replay... done bcachefs (loop0): check_extents_to_backpointers... bcachefs (loop0): scanning for missing backpointers in 5/128 buckets done bcachefs (loop0): check_inodes... done bcachefs (loop0): check_extents... key in missing inode: u64s 7 type extent 4099:8:U32_MAX len 8 ver 0: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum none 0:0 compress incompressible ptr: 0:34:0 gen 0, fixing key in missing inode: u64s 7 type extent 4099:8:U32_MAX len 8 ver 0: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum none 0:0 compress incompressible ptr: 0:34:0 gen 0, fixing key in missing inode: u64s 7 type extent 4099:8:U32_MAX len 8 ver 0: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum none 0:0 compress incompressible ptr: 0:34:0 gen 0, fixing key in missing inode: u64s 7 type extent 4099:8:U32_MAX len 8 ver 0: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum none 0:0 compress incompressible ptr: 0:34:0 gen 0, fixing key in missing inode: u64s 10 type inline_data 4100:8:U32_MAX len 8 ver 0: datalen 40: 2f746d702f73797a2d696d61676567656e3931343136303536352f66696c6530, fixing key in missing inode: u64s 7 type inline_data 536870912:8:U32_MAX len 8 ver 0: datalen 16: 73797a6b616c6c657273000000000000, fixing key in missing inode: u64s 7 type extent 536870913:24:U32_MAX len 24 ver 0: durability: 1 crc: c_size 8 size 24 offset 0 nonce 0 csum none 0:0 compress lz4 ptr: 0:34:8 gen 0, fixing ================================================================== BUG: KASAN: use-after-free in __extent_entry_type fs/bcachefs/extents.h:53 [inline] BUG: KASAN: use-after-free in extent_entry_is_crc fs/bcachefs/extents.h:120 [inline] BUG: KASAN: use-after-free in check_extent_overbig+0x27b/0x7d0 fs/bcachefs/fsck.c:1812 Read of size 8 at addr ffff888055180188 by task syz.0.0/5316 CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.13.0-syzkaller-02526-gc4b9570cfb63 #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 __extent_entry_type fs/bcachefs/extents.h:53 [inline] extent_entry_is_crc fs/bcachefs/extents.h:120 [inline] check_extent_overbig+0x27b/0x7d0 fs/bcachefs/fsck.c:1812 bch2_check_extents+0x9d0/0x60a0 fs/bcachefs/fsck.c:1945 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:226 bch2_run_recovery_passes+0x2ad/0xa90 fs/bcachefs/recovery_passes.c:291 bch2_fs_recovery+0x265a/0x3de0 fs/bcachefs/recovery.c:937 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1030 bch2_fs_get_tree+0xd8d/0x1740 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: 0033:0x7f68717874ca 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:00007f68725b6e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f68725b6ef0 RCX: 00007f68717874ca RDX: 000000002009de00 RSI: 0000000020005900 RDI: 00007f68725b6eb0 RBP: 000000002009de00 R08: 00007f68725b6ef0 R09: 0000000001000000 R10: 0000000001000000 R11: 0000000000000246 R12: 0000000020005900 R13: 00007f68725b6eb0 R14: 0000000000005906 R15: 00000000200001c0 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x55180 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f0(buddy) raw: 04fff00000000000 ffffea000156e808 ffff88805ffd7008 0000000000000000 raw: 0000000000000000 0000000000000005 00000000f0000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 5, migratetype Unmovable, gfp_mask 0x52800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP), pid 5316, tgid 5315 (syz.0.0), ts 73536140075, free_ts 74372799225 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_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] ___kmalloc_large_node+0x8b/0x1d0 mm/slub.c:4243 __kmalloc_large_node_noprof+0x1a/0x80 mm/slub.c:4270 __do_kmalloc_node mm/slub.c:4286 [inline] __kmalloc_node_noprof+0x33a/0x4d0 mm/slub.c:4304 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:645 btree_bounce_alloc fs/bcachefs/btree_io.c:123 [inline] bch2_btree_node_read_done+0x36c1/0x5f70 fs/bcachefs/btree_io.c:1222 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+0x617/0x7a0 fs/bcachefs/btree_io.c:1811 read_btree_roots+0x3d3/0xa70 fs/bcachefs/recovery.c:582 bch2_fs_recovery+0x260f/0x3de0 fs/bcachefs/recovery.c:929 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1030 bch2_fs_get_tree+0xd8d/0x1740 fs/bcachefs/fs.c:2203 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 page last free pid 5316 tgid 5315 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] __free_pages_ok+0xbda/0xe60 mm/page_alloc.c:1271 __folio_put+0x2b3/0x360 mm/swap.c:112 folio_put include/linux/mm.h:1489 [inline] free_large_kmalloc+0xfe/0x180 mm/slub.c:4732 kfree+0x212/0x430 mm/slub.c:4755 btree_bounce_free fs/bcachefs/btree_io.c:111 [inline] btree_node_sort+0x1100/0x1830 fs/bcachefs/btree_io.c:379 bch2_btree_post_write_cleanup+0x11a/0xa70 fs/bcachefs/btree_io.c:2293 bch2_btree_node_prep_for_write+0x55b/0x8f0 fs/bcachefs/btree_trans_commit.c:93 bch2_trans_lock_write+0x68e/0xc60 fs/bcachefs/btree_trans_commit.c:129 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:862 [inline] __bch2_trans_commit+0x2595/0x97a0 fs/bcachefs/btree_trans_commit.c:1066 bch2_trans_commit fs/bcachefs/btree_update.h:183 [inline] check_extent fs/bcachefs/fsck.c:1902 [inline] bch2_check_extents+0x4131/0x60a0 fs/bcachefs/fsck.c:1945 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:226 bch2_run_recovery_passes+0x2ad/0xa90 fs/bcachefs/recovery_passes.c:291 bch2_fs_recovery+0x265a/0x3de0 fs/bcachefs/recovery.c:937 bch2_fs_start+0x37c/0x610 fs/bcachefs/super.c:1030 bch2_fs_get_tree+0xd8d/0x1740 fs/bcachefs/fs.c:2203 vfs_get_tree+0x90/0x2b0 fs/super.c:1814 Memory state around the buggy address: ffff888055180080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888055180100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888055180180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888055180200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888055180280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================