bcachefs (loop0): 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 ffff0000f79e0000 by task syz.0.136/7241

CPU: 1 UID: 0 PID: 7241 Comm: syz.0.136 Not tainted 6.14.0-rc5-syzkaller-g14d05f12084d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:466 (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:408 [inline]
 print_report+0x198/0x550 mm/kasan/report.c:521
 kasan_report+0xd8/0x138 mm/kasan/report.c:634
 __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:89 [inline]
 bch2_checksum+0x4b8/0x794 fs/bcachefs/checksum.c:226
 bch2_btree_node_read_done+0xe94/0x4acc fs/bcachefs/btree_io.c:1100
 btree_node_read_work+0x534/0xf20 fs/bcachefs/btree_io.c:1358
 bch2_btree_node_read+0x1da0/0x2480 fs/bcachefs/btree_io.c:1748
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1789 [inline]
 bch2_btree_root_read+0x2c0/0x41c fs/bcachefs/btree_io.c:1811
 read_btree_roots+0x2e0/0x88c fs/bcachefs/recovery.c:581
 bch2_fs_recovery+0x2094/0x32ec fs/bcachefs/recovery.c:928
 bch2_fs_start+0x32c/0x570 fs/bcachefs/super.c:1041
 bch2_fs_get_tree+0xa50/0x11d4 fs/bcachefs/fs.c:2203
 vfs_get_tree+0x90/0x28c fs/super.c:1814
 do_new_mount+0x278/0x900 fs/namespace.c:3560
 path_mount+0x590/0xe04 fs/namespace.c:3887
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount fs/namespace.c:4088 [inline]
 __arm64_sys_mount+0x4f4/0x5d0 fs/namespace.c:4088
 __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:0x1379e0
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
page_type: f0(buddy)
raw: 05ffc00000000000 ffff0001fea8fce8 ffff0001fea8fce8 0000000000000000
raw: 0000000000000000 0000000000000005 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f79dff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000f79dff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000f79e0000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000f79e0080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f79e0100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
bcachefs (loop0): error validating btree node on loop0 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 e5e3f5ae2c95d010 should be 0000000000000000, exiting
bcachefs (loop0): Unable to continue, halting
bcachefs (loop0): flagging btree extents lost data
bcachefs (loop0): running explicit recovery pass check_topology (2), currently at recovery_pass_empty (0)
bcachefs (loop0): running explicit recovery pass scan_for_btree_nodes (1), currently at recovery_pass_empty (0)
error reading btree root btree=extents level=0: btree_node_read_error, fixing
bcachefs (loop0): error validating btree node on loop0 at btree inodes level 0/0
  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  
  node offset 0/24: bad magic: want 59513f585d347cd2, got 0
bcachefs (loop0): flagging btree inodes lost data
error reading btree root btree=inodes level=0: btree_node_read_error, fixing
bcachefs (loop0): error validating btree node on loop0 at btree dirents level 0/0
  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  
  node offset 0/24: bad magic: want 59513f585d347cd2, got 0
bcachefs (loop0): flagging btree dirents lost data
error reading btree root btree=dirents level=0: btree_node_read_error, fixing
bcachefs (loop0): error validating btree node on loop0 at btree xattrs level 0/0
  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  
  node offset 0/16: bad magic: want 59513f585d347cd2, got 0
bcachefs (loop0): flagging btree xattrs lost data
error reading btree root btree=xattrs level=0: btree_node_read_error, fixing
bcachefs (loop0): error validating btree node on loop0 at btree subvolumes level 0/0
  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  
  node offset 0/16: bad magic: want 59513f585d347cd2, got 0
bcachefs (loop0): flagging btree subvolumes lost data
error reading btree root btree=subvolumes level=0: btree_node_read_error, fixing
bcachefs (loop0): error validating btree node on loop0 at btree snapshots level 0/0
  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  
  node offset 0/16: bad magic: want 59513f585d347cd2, got 0
bcachefs (loop0): flagging btree snapshots lost data
error reading btree root btree=snapshots level=0: btree_node_read_error, fixing
bcachefs (loop0): error validating btree node on loop0 at btree deleted_inodes level 0/0
  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  
  node offset 0/8: bad magic: want 59513f585d347cd2, got 0
bcachefs (loop0): flagging btree deleted_inodes lost data
error reading btree root btree=deleted_inodes level=0: btree_node_read_error, fixing
bcachefs (loop0): scan_for_btree_nodes...
bcachefs (loop0): bch2_scan_for_btree_nodes: no btree nodes found
bcachefs (loop0): bch2_fs_recovery(): error EINVAL
bcachefs (loop0): bch2_fs_start(): error starting filesystem EINVAL
bcachefs (loop0): shutting down
bcachefs (loop0): shutdown complete
bcachefs: bch2_fs_get_tree() error: EINVAL