bcachefs (loop3): mounting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,nojournal_transaction_names
bcachefs (loop3): recovering from clean shutdown, journal seq 13
==================================================================
BUG: KASAN: use-after-free in neon_poly1305_do_update arch/arm64/crypto/poly1305-glue.c:107 [inline]
BUG: KASAN: use-after-free in neon_poly1305_update+0x2e0/0xb34 arch/arm64/crypto/poly1305-glue.c:119
Read of size 8 at addr ffff0000f0020090 by task syz.3.22/6486

CPU: 1 PID: 6486 Comm: syz.3.22 Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x198/0x538 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 kasan_check_range+0x268/0x2a8 mm/kasan/generic.c:189
 __asan_memcpy+0x3c/0x84 mm/kasan/shadow.c:105
 neon_poly1305_do_update arch/arm64/crypto/poly1305-glue.c:107 [inline]
 neon_poly1305_update+0x2e0/0xb34 arch/arm64/crypto/poly1305-glue.c:119
 crypto_shash_update+0x90/0xa8 crypto/shash.c:52
 bch2_checksum+0x690/0x784 fs/bcachefs/checksum.c:229
 bch2_btree_node_read_done+0x119c/0x4ac8 fs/bcachefs/btree_io.c:1074
 btree_node_read_work+0x50c/0xe04 fs/bcachefs/btree_io.c:1345
 bch2_btree_node_read+0x1f50/0x280c fs/bcachefs/btree_io.c:1730
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1769 [inline]
 bch2_btree_root_read+0x2a8/0x534 fs/bcachefs/btree_io.c:1793
 read_btree_roots+0x21c/0x730 fs/bcachefs/recovery.c:481
 bch2_fs_recovery+0x31c8/0x5488 fs/bcachefs/recovery.c:809
 bch2_fs_start+0x30c/0x53c fs/bcachefs/super.c:1035
 bch2_fs_open+0x8b4/0xb64 fs/bcachefs/super.c:2132
 bch2_mount+0x4fc/0xe68 fs/bcachefs/fs.c:1926
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x288 fs/super.c:1789
 do_new_mount+0x278/0x900 fs/namespace.c:3352
 path_mount+0x590/0xe04 fs/namespace.c:3679
 do_mount fs/namespace.c:3692 [inline]
 __do_sys_mount fs/namespace.c:3898 [inline]
 __se_sys_mount fs/namespace.c:3875 [inline]
 __arm64_sys_mount+0x3c4/0x488 fs/namespace.c:3875
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x787 pfn:0x130020
flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000787 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000f001ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f0020000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>ffff0000f0020080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                         ^
 ffff0000f0020100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000f0020180: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================
bcachefs (loop3): flagging btree backpointers lost data
error reading btree root backpointers l=0: btree_node_read_error, shutting down
bcachefs (loop3): inconsistency detected - emergency read only at journal seq 13
bcachefs (loop3): bch2_fs_recovery(): error fsck_errors_not_fixed
bcachefs (loop3): bch2_fs_start(): error starting filesystem fsck_errors_not_fixed
bcachefs (loop3): shutting down
bcachefs (loop3): shutdown complete