bcachefs (loop0): bucket incorrectly unset in need_discard btree u64s 13 type alloc_v4 0:34:0 len 0 ver 0: gen 0 oldest_gen 0 data_type need_discard journal_seq_nonempty 5 journal_seq_empty 134217728 need_discard 1 need_inc_gen 1 dirty_sectors 0 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 1 io_time[WRITE] 512 fragmentation 0 bp_start 8 , fixing bcachefs (loop0): hole in alloc btree missing in freespace btree device 0 buckets 36-37, fixing bcachefs (loop0): hole in alloc btree missing in freespace btree device 0 buckets 39-40, fixing bcachefs (loop0): hole in alloc btree missing in freespace btree device 0 buckets 43-120, fixing done bcachefs (loop0): check_lrus... bcachefs (loop0): incorrect lru entry: lru fragmentation time 134217728 u64s 5 type set 18446462598867058688:6597069766690:0 len 0 ver 0 for u64s 5 type deleted 0:6597069766690:0 len 0 ver 0, fixing done bcachefs (loop0): check_backpointers_to_extents... done bcachefs (loop0): check_extents_to_backpointers... bcachefs (loop0): scanning for missing backpointers in 3/128 buckets done bcachefs (loop0): check_subvols... done bcachefs (loop0): check_inodes... bcachefs (loop0): directory 4096:4294967295 with nonzero i_size -6917529027641081856, fixing bcachefs (loop0): reconstructing subvol 1 with root inode 4096 bcachefs (loop0): reconstructing subvol 1 with root inode 4096 bcachefs (loop0): reconstruct_subvol(): error getting snapshot tree 0 ENOENT_bkey_type_mismatch bcachefs (loop0): reconstructing subvol 1 with root inode 4096 bcachefs (loop0): reconstruct_subvol(): error getting snapshot tree 0 ENOENT_bkey_type_mismatch bcachefs (loop0): reconstructing subvol 1 with root inode 4096 bcachefs (loop0): reconstruct_subvol(): error getting snapshot tree 0 ENOENT_bkey_type_mismatch done bcachefs (loop0): check_dirents... bcachefs (loop0): dirent points to missing inode: u64s 7 type dirent 4096:189491840996961599:U32_MAX len 0 ver 0: file0 -> 4098 type dir, fixing bcachefs (loop0): dirent points to missing inode: u64s 7 type dirent 4096:1896155912177158345:U32_MAX len 0 ver 0: file3 -> 536870913 type reg, fixing ================================================================== BUG: KASAN: use-after-free in check_dirent fs/bcachefs/fsck.c:2416 [inline] BUG: KASAN: use-after-free in bch2_check_dirents+0x1fac/0x33f0 fs/bcachefs/fsck.c:2442 Read of size 1 at addr ffff888054be00e8 by task syz.0.0/5341 CPU: 0 UID: 0 PID: 5341 Comm: syz.0.0 Not tainted 6.16.0-rc5-syzkaller-00121-gbc9ff192a6c9 #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:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 check_dirent fs/bcachefs/fsck.c:2416 [inline] bch2_check_dirents+0x1fac/0x33f0 fs/bcachefs/fsck.c:2442 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline] __bch2_run_recovery_passes+0x395/0x1010 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:1005 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:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 do_mount fs/namespace.c:4239 [inline] __do_sys_mount fs/namespace.c:4450 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4427 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: 0033:0x7fce265900ca 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:00007fce27479e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fce27479ef0 RCX: 00007fce265900ca RDX: 00002000000000c0 RSI: 0000200000000080 RDI: 00007fce27479eb0 RBP: 00002000000000c0 R08: 00007fce27479ef0 R09: 0000000000818001 R10: 0000000000818001 R11: 0000000000000246 R12: 0000200000000080 R13: 00007fce27479eb0 R14: 00000000000059cb R15: 0000200000000300 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x54be0 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f0(buddy) raw: 04fff00000000000 ffffea0001590808 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 5341, tgid 5339 (syz.0.0), ts 74964533614, free_ts 75813206255 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 __alloc_pages_noprof+0xa/0x30 mm/page_alloc.c:4993 __alloc_pages_node_noprof include/linux/gfp.h:284 [inline] alloc_pages_node_noprof include/linux/gfp.h:311 [inline] ___kmalloc_large_node+0x85/0x210 mm/slub.c:4272 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:4300 __do_kmalloc_node mm/slub.c:4316 [inline] __kvmalloc_node_noprof+0x6d/0x5f0 mm/slub.c:5015 btree_bounce_alloc fs/bcachefs/btree_io.c:127 [inline] bch2_btree_node_read_done+0x3305/0x5520 fs/bcachefs/btree_io.c:1280 btree_node_read_work+0x426/0xe30 fs/bcachefs/btree_io.c:1442 bch2_btree_node_read+0x887/0x2a00 fs/bcachefs/btree_io.c:-1 __bch2_btree_root_read fs/bcachefs/btree_io.c:1908 [inline] bch2_btree_root_read+0x5f0/0x760 fs/bcachefs/btree_io.c:1930 read_btree_roots+0x2c6/0x840 fs/bcachefs/recovery.c:604 bch2_fs_recovery+0x261f/0x3a50 fs/bcachefs/recovery.c:995 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:1804 page last free pid 5341 tgid 5339 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_pages_ok+0xa44/0xc20 mm/page_alloc.c:1424 __folio_put+0x21b/0x2c0 mm/swap.c:112 folio_put include/linux/mm.h:1356 [inline] free_large_kmalloc+0x145/0x200 mm/slub.c:4768 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:2609 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:2411 [inline] bch2_check_dirents+0x1c5c/0x33f0 fs/bcachefs/fsck.c:2442 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:484 [inline] __bch2_run_recovery_passes+0x395/0x1010 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:1005 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:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3902 Memory state around the buggy address: ffff888054bdff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888054be0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888054be0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888054be0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888054be0180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 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