bcachefs (loop0): alloc_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): check_allocations... bcachefs (loop0): bucket 0:34 data type user ptr gen 0 missing in alloc btree while marking 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 bcachefs (loop0): bucket 0:27 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq c6c25c03258c59c5 written 16 min_key POS_MIN durability: 1 ptr: 0:27:0 gen 0, fixing bcachefs (loop0): bucket 0:38 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 7589ab5e0c11cc7a written 24 min_key POS_MIN durability: 1 ptr: 0:38:0 gen 0, fixing bcachefs (loop0): bucket 0:41 data type btree ptr gen 0 missing in alloc btree while marking 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 bcachefs (loop0): bucket 0:31 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 2285c34bed0abe32 written 16 min_key POS_MIN durability: 1 ptr: 0:31:0 gen 0, fixing bcachefs (loop0): bucket 0:35 data type btree ptr gen 0 missing in alloc btree while marking 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 bcachefs (loop0): bucket 0:32 data type btree ptr gen 0 missing in alloc btree while marking 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 bcachefs (loop0): bucket 0:28 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 28f61e078e70b95c written 16 min_key POS_MIN durability: 1 ptr: 0:28:0 gen 0, fixing bcachefs (loop0): bucket 0:29 data type btree ptr gen 0 missing in alloc btree while marking 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 bcachefs (loop0): bucket 0:37 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 4a8b0fa43a9980a6 written 24 min_key POS_MIN durability: 1 ptr: 0:37:0 gen 0, fixing bcachefs (loop0): bucket 0:42 data type btree ptr gen 0 missing in alloc btree while marking u64s 11 type btree_ptr_v2 SPOS_MAX len 0 ver 0: seq 1db8f60c84bb244c written 8 min_key POS_MIN durability: 1 ptr: 0:42:0 gen 0, fixing Ratelimiting new instances of previous error done bcachefs (loop0): going read-write bcachefs (loop0): journal_replay... done bcachefs (loop0): check_alloc_info... bcachefs (loop0): hole in alloc btree missing in freespace btree device 0 buckets 26-27, fixing done bcachefs (loop0): check_lrus... done bcachefs (loop0): check_backpointers_to_extents... done bcachefs (loop0): check_extents_to_backpointers... bcachefs (loop0): scanning for missing backpointers in 5/128 buckets done bcachefs (loop0): check_subvols... done bcachefs (loop0): check_inodes... done bcachefs (loop0): check_dirents... bcachefs (loop0): dirent points to missing inode: u64s 7 type dirent 4096:1896155912177158345:U32_MAX len 0 ver 0: file3 -> 536870913 type reg, fixing bcachefs (loop0): dirent points to missing inode: u64s 7 type dirent 4096:2695648408715017799:U32_MAX len 0 ver 0: file2 -> 536870913 type reg, fixing bcachefs (loop0): hash table key at wrong offset: should be at 5178636093158006573 u64s 8 type dirent 4096:8130059955150870709:U32_MAX len 0 ver 0: lost+foun -> 4097 type dir, fixing bcachefs (loop0): dirent points to missing inode: u64s 8 type dirent 4096:9097378837824744618:U32_MAX len 0 ver 0: file.cold -> 172335562754 type reg, fixing ================================================================== BUG: KASAN: use-after-free in check_dirent fs/bcachefs/fsck.c:2396 [inline] BUG: KASAN: use-after-free in bch2_check_dirents+0x1fac/0x33f0 fs/bcachefs/fsck.c:2422 Read of size 1 at addr ffff888055680190 by task syz.0.0/5359 CPU: 0 UID: 0 PID: 5359 Comm: syz.0.0 Not tainted 6.17.0-rc1-syzkaller-00224-g8d561baae505 #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 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_dirent fs/bcachefs/fsck.c:2396 [inline] bch2_check_dirents+0x1fac/0x33f0 fs/bcachefs/fsck.c:2422 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline] __bch2_run_recovery_passes+0x3ba/0x1060 fs/bcachefs/recovery_passes.c:539 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:610 bch2_fs_recovery+0x2690/0x3a50 fs/bcachefs/recovery.c:1016 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4321 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdc66f9038a 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:00007fdc67e06e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fdc67e06ef0 RCX: 00007fdc66f9038a RDX: 0000200000000080 RSI: 00002000000000c0 RDI: 00007fdc67e06eb0 RBP: 0000200000000080 R08: 00007fdc67e06ef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00002000000000c0 R13: 00007fdc67e06eb0 R14: 00000000000059a5 R15: 0000200000000000 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x55680 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f0(buddy) raw: 04fff00000000000 ffffea0001580808 ffff88805ffd6f08 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 0x42800(GFP_NOWAIT|__GFP_COMP), pid 5359, tgid 5358 (syz.0.0), ts 76800688246, free_ts 77173962709 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1851 prep_new_page mm/page_alloc.c:1859 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3858 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5148 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2416 ___kmalloc_large_node+0x5f/0x1b0 mm/slub.c:4306 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:4337 __do_kmalloc_node mm/slub.c:4353 [inline] __kvmalloc_node_noprof+0x6d/0x5f0 mm/slub.c:5052 btree_bounce_alloc fs/bcachefs/btree_io.c:127 [inline] bch2_btree_node_read_done+0x32f6/0x5550 fs/bcachefs/btree_io.c:1278 btree_node_read_work+0x40e/0xe60 fs/bcachefs/btree_io.c:1440 bch2_btree_node_read+0x887/0x2a00 fs/bcachefs/btree_io.c:-1 __bch2_btree_root_read fs/bcachefs/btree_io.c:1906 [inline] bch2_btree_root_read+0x5f0/0x760 fs/bcachefs/btree_io.c:1928 read_btree_roots+0x2c6/0x840 fs/bcachefs/recovery.c:615 bch2_fs_recovery+0x261f/0x3a50 fs/bcachefs/recovery.c:1006 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 page last free pid 5359 tgid 5358 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_pages_ok+0xa83/0xbe0 mm/page_alloc.c:1571 free_large_kmalloc+0x13a/0x1f0 mm/slub.c:4805 btree_bounce_free fs/bcachefs/btree_io.c:115 [inline] btree_node_sort+0x117f/0x1760 fs/bcachefs/btree_io.c:383 bch2_btree_post_write_cleanup+0x11f/0xad0 fs/bcachefs/btree_io.c:2607 bch2_btree_node_prep_for_write+0x337/0x650 fs/bcachefs/btree_trans_commit.c:95 bch2_trans_lock_write+0x669/0xba0 fs/bcachefs/btree_trans_commit.c:131 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:850 [inline] __bch2_trans_commit+0x2773/0x8870 fs/bcachefs/btree_trans_commit.c:1085 bch2_trans_commit fs/bcachefs/btree_update.h:241 [inline] check_dirent fs/bcachefs/fsck.c:2391 [inline] bch2_check_dirents+0x1c5c/0x33f0 fs/bcachefs/fsck.c:2422 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline] __bch2_run_recovery_passes+0x3ba/0x1060 fs/bcachefs/recovery_passes.c:539 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:610 bch2_fs_recovery+0x2690/0x3a50 fs/bcachefs/recovery.c:1016 bch2_fs_start+0xaaf/0xda0 fs/bcachefs/super.c:1213 bch2_fs_get_tree+0xb39/0x1520 fs/bcachefs/fs.c:2488 vfs_get_tree+0x92/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805 do_mount fs/namespace.c:4133 [inline] __do_sys_mount fs/namespace.c:4344 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4321 Memory state around the buggy address: ffff888055680080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888055680100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888055680180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888055680200: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888055680280: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ==================================================================