bcachefs (loop1): dropping and reconstructing all alloc info
==================================================================
BUG: KASAN: use-after-free in crc64_be+0xb4/0xe4 lib/crc64.c:58
Read of size 1 at addr ffff0000f8a40000 by task syz.1.108/7189

CPU: 1 UID: 0 PID: 7189 Comm: syz.1.108 Not tainted 6.13.0-rc2-syzkaller-g146ff2c261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:484 (C)
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:489
 kasan_report+0xd8/0x138 mm/kasan/report.c:602
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 crc64_be+0xb4/0xe4 lib/crc64.c:58
 bch2_checksum_update fs/bcachefs/checksum.c:88 [inline]
 bch2_checksum+0x4a8/0x784 fs/bcachefs/checksum.c:225
 bch2_btree_node_read_done+0x127c/0x4b78 fs/bcachefs/btree_io.c:1056
 btree_node_read_work+0x50c/0xe08 fs/bcachefs/btree_io.c:1323
 bch2_btree_node_read+0x1f3c/0x27ec fs/bcachefs/btree_io.c:1708
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline]
 bch2_btree_root_read+0x2b0/0x40c fs/bcachefs/btree_io.c:1771
 read_btree_roots+0x24c/0x794 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x328c/0x55dc fs/bcachefs/recovery.c:853
 bch2_fs_start+0x30c/0x53c fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0x938/0x1030 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x28c fs/super.c:1814
 do_new_mount+0x278/0x900 fs/namespace.c:3507
 path_mount+0x590/0xe04 fs/namespace.c:3834
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount fs/namespace.c:4034 [inline]
 __arm64_sys_mount+0x4d4/0x5ac fs/namespace.c:4034
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x138a40
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: f0(buddy)
raw: 05ffc00000000000 ffff0001fea8ed50 ffff0001fea8ed50 0000000000000000
raw: 0000000000000000 0000000000000006 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f8a3ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f8a3ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000f8a40000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000f8a40080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f8a40100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
bcachefs (loop1): error validating btree node on loop1 at btree extents level 0/0
  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  
  node offset 0/16 bset u64s 50886: checksum error, type crc64: got 6354bc27bd6b2a76 should be 0000000000000000, exiting
bcachefs (loop1): Unable to continue, halting
bcachefs (loop1): flagging btree extents lost data
error reading btree root extents l=0: btree_node_read_error, exiting
bcachefs (loop1): Unable to continue, halting
bcachefs (loop1): bch2_fs_recovery(): error fsck_errors_not_fixed
bcachefs (loop1): bch2_fs_start(): error starting filesystem fsck_errors_not_fixed
bcachefs (loop1): shutting down
bcachefs (loop1): shutdown complete
bcachefs: bch2_fs_get_tree() error: fsck_errors_not_fixed