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
  loop0 node offset 16/24: btree node data missing: expected 24 sectors, found 16
  repair success (rewriting node)
==================================================================
BUG: KASAN: slab-use-after-free in bch2_btree_node_read_done+0xd28/0x5150 fs/bcachefs/btree_io.c:1131
Read of size 8 at addr ffff88804292c010 by task syz.0.15/5849

CPU: 0 UID: 0 PID: 5849 Comm: syz.0.15 Not tainted 6.15.0-syzkaller-g7a912d04415b #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:
 <TASK>
 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
 bch2_btree_node_read_done+0xd28/0x5150 fs/bcachefs/btree_io.c:1131
 btree_node_read_work+0x426/0xe30 fs/bcachefs/btree_io.c:1399
 bch2_btree_node_read+0x887/0x2a00 fs/bcachefs/btree_io.c:-1
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1865 [inline]
 bch2_btree_root_read+0x5f0/0x760 fs/bcachefs/btree_io.c:1887
 read_btree_roots+0x2c2/0x880 fs/bcachefs/recovery.c:591
 bch2_fs_recovery+0x25ec/0x39a0 fs/bcachefs/recovery.c:964
 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1200
 bch2_fs_get_tree+0xb6c/0x1460 fs/bcachefs/fs.c:2489
 vfs_get_tree+0x92/0x2b0 fs/super.c:1802
 do_new_mount+0x24a/0xa40 fs/namespace.c:3856
 do_mount fs/namespace.c:4193 [inline]
 __do_sys_mount fs/namespace.c:4404 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4381
 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: 0033:0x7f136e57ffba
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:00007f136f394e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f136f394ef0 RCX: 00007f136e57ffba
RDX: 00000000200000c0 RSI: 0000000020000180 RDI: 00007f136f394eb0
RBP: 00000000200000c0 R08: 00007f136f394ef0 R09: 0000000000000010
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000020000180
R13: 00007f136f394eb0 R14: 0000000000005943 R15: 0000000020000480
 </TASK>

Allocated by task 4740:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4148 [inline]
 slab_alloc_node mm/slub.c:4197 [inline]
 kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4216
 alloc_inode+0xb8/0x1b0 fs/inode.c:348
 iget_locked+0xf0/0x570 fs/inode.c:1439
 kernfs_get_inode+0x4f/0x780 fs/kernfs/inode.c:251
 kernfs_iop_lookup+0x1f6/0x320 fs/kernfs/dir.c:1236
 __lookup_slow+0x294/0x3d0 fs/namei.c:1817
 lookup_slow+0x53/0x70 fs/namei.c:1834
 walk_component+0x2d2/0x400 fs/namei.c:2138
 lookup_last fs/namei.c:2639 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2663
 filename_lookup+0x212/0x570 fs/namei.c:2692
 do_readlinkat+0xd9/0x500 fs/stat.c:576
 __do_sys_readlink fs/stat.c:613 [inline]
 __se_sys_readlink fs/stat.c:610 [inline]
 __x64_sys_readlink+0x7f/0x90 fs/stat.c:610
 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

Freed by task 15:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kmem_cache_free+0x18f/0x400 mm/slub.c:4745
 rcu_do_batch kernel/rcu/tree.c:2576 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Last potentially related work creation:
 kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548
 __call_rcu_common kernel/rcu/tree.c:3090 [inline]
 call_rcu+0x142/0x990 kernel/rcu/tree.c:3210
 destroy_inode fs/inode.c:401 [inline]
 evict+0x847/0x9c0 fs/inode.c:834
 __dentry_kill+0x209/0x660 fs/dcache.c:669
 shrink_kill+0xa9/0x2c0 fs/dcache.c:1114
 shrink_dentry_list+0x2e0/0x5e0 fs/dcache.c:1141
 prune_dcache_sb+0x10e/0x180 fs/dcache.c:1222
 super_cache_scan+0x369/0x4b0 fs/super.c:222
 do_shrink_slab+0x6ef/0x1110 mm/shrinker.c:437
 shrink_slab+0xd74/0x10d0 mm/shrinker.c:664
 shrink_one+0x28a/0x7c0 mm/vmscan.c:4939
 shrink_many mm/vmscan.c:5000 [inline]
 lru_gen_shrink_node mm/vmscan.c:5078 [inline]
 shrink_node+0x314e/0x3760 mm/vmscan.c:6060
 kswapd_shrink_node mm/vmscan.c:6911 [inline]
 balance_pgdat mm/vmscan.c:7094 [inline]
 kswapd+0x147c/0x2830 mm/vmscan.c:7359
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff88804292c000
 which belongs to the cache inode_cache of size 1160
The buggy address is located 16 bytes inside of
 freed 1160-byte region [ffff88804292c000, ffff88804292c488)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88804292f250 pfn:0x4292c
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000000240(workingset|head|node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000240 ffff88801b6e08c0 ffffea00010a5910 ffffea00010a4e10
raw: ffff88804292f250 00000000000c0001 00000000f5000000 0000000000000000
head: 04fff00000000240 ffff88801b6e08c0 ffffea00010a5910 ffffea00010a4e10
head: ffff88804292f250 00000000000c0001 00000000f5000000 0000000000000000
head: 04fff00000000002 ffffea00010a4b01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
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_RECLAIMABLE|__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 4740, tgid 4740 (udevadm), ts 37407564640, free_ts 0
 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_mpol+0x232/0x4a0 mm/mempolicy.c:2419
 alloc_slab_page mm/slub.c:2451 [inline]
 allocate_slab+0x8a/0x3b0 mm/slub.c:2619
 new_slab mm/slub.c:2673 [inline]
 ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859
 __slab_alloc mm/slub.c:3949 [inline]
 __slab_alloc_node mm/slub.c:4024 [inline]
 slab_alloc_node mm/slub.c:4185 [inline]
 kmem_cache_alloc_lru_noprof+0x288/0x3d0 mm/slub.c:4216
 alloc_inode+0xb8/0x1b0 fs/inode.c:348
 iget_locked+0xf0/0x570 fs/inode.c:1439
 kernfs_get_inode+0x4f/0x780 fs/kernfs/inode.c:251
 kernfs_iop_lookup+0x1f6/0x320 fs/kernfs/dir.c:1236
 __lookup_slow+0x294/0x3d0 fs/namei.c:1817
 lookup_slow+0x53/0x70 fs/namei.c:1834
 walk_component+0x2d2/0x400 fs/namei.c:2138
 lookup_last fs/namei.c:2639 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2663
 filename_lookup+0x212/0x570 fs/namei.c:2692
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88804292bf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88804292bf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88804292c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff88804292c080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88804292c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================