running recovery pass check_btree_backpointers (15), currently at recovery_pass_empty (0) ret fsck_errors_not_fixed bcachefs (loop0): error reading btree root btree=backpointers level=0: btree_node_read_error, fixing bcachefs (loop0): check_topology... bcachefs (loop0): btree root inodes unreadable, must recover from scan bcachefs (loop0): no nodes found for btree inodes, continuing done bcachefs (loop0): accounting_read... done 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 8 type extent 4099:8:U32_MAX len 8 ver 1: durability: 1 crc: c_size 8 size 8 offset 0 nonce 0 csum chacha20_poly1305_80 e371:ac69b75b10c57971 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 4e0410879b0c2f04 written 16 min_key POS_MIN durability: 1 ptr: 0:27:0 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 267fcf747c875937 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 1b881868e2a6abe1 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 d682cebdf2a7eb26 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 d771a06d670df06c 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 93dda84068e88b3f 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 b6c44d07df4e9bb7 written 48 min_key POS_MIN durability: 1 ptr: 0:29:0 gen 0, fixing bcachefs (loop0): bucket 0:40 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 82036bda63714c10 written 8 min_key POS_MIN durability: 1 ptr: 0:40:0 gen 0, fixing done bcachefs (loop0): going read-write bcachefs (loop0): journal_replay... bcachefs (loop0): u64s 13 type alloc_v4 0:40:0 len 0 ver 0: gen 0 oldest_gen 0 data_type btree journal_seq_nonempty 0 journal_seq_empty 0 need_discard 0 need_inc_gen 0 dirty_sectors 256 stripe_sectors 0 cached_sectors 0 stripe 0 stripe_redundancy 0 io_time[READ] 0 io_time[WRITE] 0 fragmentation 0 bp_start 8 incorrectly set at freespace:0:40:0 (free 0, genbits 0 should be 0), fixing ================================================================== BUG: KASAN: slab-use-after-free in journal_entry_init fs/bcachefs/journal.h:217 [inline] BUG: KASAN: slab-use-after-free in bch2_journal_add_entry fs/bcachefs/journal.h:242 [inline] BUG: KASAN: slab-use-after-free in bch2_journal_res_put fs/bcachefs/journal.h:320 [inline] BUG: KASAN: slab-use-after-free in do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:868 [inline] BUG: KASAN: slab-use-after-free in __bch2_trans_commit+0x359e/0x8880 fs/bcachefs/btree_trans_commit.c:1079 Write of size 8 at addr ffff8880552b0000 by task syz.0.0/5333 CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted 6.16.0-rc2-syzkaller-00024-g9afe652958c3 #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 journal_entry_init fs/bcachefs/journal.h:217 [inline] bch2_journal_add_entry fs/bcachefs/journal.h:242 [inline] bch2_journal_res_put fs/bcachefs/journal.h:320 [inline] do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:868 [inline] __bch2_trans_commit+0x359e/0x8880 fs/bcachefs/btree_trans_commit.c:1079 bch2_trans_commit fs/bcachefs/btree_update.h:242 [inline] bch2_journal_replay+0x1789/0x2620 fs/bcachefs/recovery.c:396 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x395/0x1010 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x25fd/0x3950 fs/bcachefs/recovery.c:989 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1203 bch2_fs_get_tree+0xb02/0x14f0 fs/bcachefs/fs.c:2489 vfs_get_tree+0x92/0x2b0 fs/super.c:1804 do_new_mount+0x24a/0xa40 fs/namespace.c:3885 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 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: 0033:0x7fe2df7900ca 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:00007fe2e063fe68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fe2e063fef0 RCX: 00007fe2df7900ca RDX: 000020000000f640 RSI: 0000200000000080 RDI: 00007fe2e063feb0 RBP: 000020000000f640 R08: 00007fe2e063fef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000080 R13: 00007fe2e063feb0 R14: 000000000000f62f R15: 0000200000000000 Allocated by task 4717: 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_node_noprof+0x1bb/0x3c0 mm/slub.c:4249 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1336 [inline] alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6668 sock_alloc_send_pskb+0x857/0x990 net/core/sock.c:2999 unix_dgram_sendmsg+0x4f6/0x1870 net/unix/af_unix.c:2072 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:727 __sys_sendto+0x3bd/0x520 net/socket.c:2180 __do_sys_sendto net/socket.c:2187 [inline] __se_sys_sendto net/socket.c:2183 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2183 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 4710: 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 __unix_dgram_recvmsg+0xa25/0xde0 net/unix/af_unix.c:2588 sock_recvmsg_nosec net/socket.c:1017 [inline] sock_recvmsg+0x22c/0x270 net/socket.c:1039 sock_read_iter+0x231/0x2f0 net/socket.c:1109 new_sync_read fs/read_write.c:491 [inline] vfs_read+0x4cd/0x980 fs/read_write.c:572 ksys_read+0x145/0x250 fs/read_write.c:715 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 The buggy address belongs to the object at ffff8880552b0000 which belongs to the cache skbuff_head_cache of size 240 The buggy address is located 0 bytes inside of freed 240-byte region [ffff8880552b0000, ffff8880552b00f0) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x552b0 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801befab40 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 4717, tgid 4717 (klogd), ts 86413406595, 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_node_noprof+0x280/0x3c0 mm/slub.c:4249 __alloc_skb+0x112/0x2d0 net/core/skbuff.c:660 alloc_skb include/linux/skbuff.h:1336 [inline] alloc_skb_with_frags+0xca/0x890 net/core/skbuff.c:6668 sock_alloc_send_pskb+0x857/0x990 net/core/sock.c:2999 unix_dgram_sendmsg+0x4f6/0x1870 net/unix/af_unix.c:2072 sock_sendmsg_nosec net/socket.c:712 [inline] __sock_sendmsg+0x21c/0x270 net/socket.c:727 __sys_sendto+0x3bd/0x520 net/socket.c:2180 __do_sys_sendto net/socket.c:2187 [inline] __se_sys_sendto net/socket.c:2183 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2183 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 page_owner free stack trace missing Memory state around the buggy address: ffff8880552aff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880552aff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880552b0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880552b0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc ffff8880552b0100: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ==================================================================