bcachefs (loop0): recovering from clean shutdown, journal seq 13
bcachefs (loop0): Doing compatible version upgrade from 1.7: mi_btree_bitmap to 1.12: rebalance_work_acct_fix
  running recovery passes: check_allocations
==================================================================
BUG: KASAN: use-after-free in memcpy_dir crypto/scatterwalk.c:23 [inline]
BUG: KASAN: use-after-free in scatterwalk_copychunks+0x1cc/0x460 crypto/scatterwalk.c:38
Read of size 32 at addr ffff88806ce00000 by task syz-executor.0/5598

CPU: 0 UID: 0 PID: 5598 Comm: syz-executor.0 Not tainted 6.11.0-rc5-next-20240827-syzkaller-g6f923748057a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189
 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
 memcpy_dir crypto/scatterwalk.c:23 [inline]
 scatterwalk_copychunks+0x1cc/0x460 crypto/scatterwalk.c:38
 skcipher_next_slow+0x39d/0x480 crypto/skcipher.c:276
 skcipher_walk_next+0x634/0xba0 crypto/skcipher.c:361
 chacha_simd_stream_xor+0x67f/0xd10 arch/x86/crypto/chacha_glue.c:192
 do_encrypt_sg fs/bcachefs/checksum.c:109 [inline]
 do_encrypt+0x4ef/0x7d0 fs/bcachefs/checksum.c:129
 bset_encrypt fs/bcachefs/btree_io.h:118 [inline]
 bch2_btree_node_read_done+0x1de7/0x5d60 fs/bcachefs/btree_io.c:1074
 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1323
 bch2_btree_node_read+0x2433/0x2a10
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline]
 bch2_btree_root_read+0x626/0x980 fs/bcachefs/btree_io.c:1773
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x24ac/0x38b0 fs/bcachefs/recovery.c:851
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd65/0x1700 fs/bcachefs/fs.c:2038
 vfs_get_tree+0x90/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe08507f3aa
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe085dfdef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe085dfdf80 RCX: 00007fe08507f3aa
RDX: 000000002000f640 RSI: 000000002000f680 RDI: 00007fe085dfdf40
RBP: 000000002000f640 R08: 00007fe085dfdf80 R09: 0000000000010400
R10: 0000000000010400 R11: 0000000000000246 R12: 000000002000f680
R13: 00007fe085dfdf40 R14: 000000000000f631 R15: 00000000200000c0
 </TASK>

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6ce00
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f0(buddy)
raw: 00fff00000000000 ffff88813fffc008 ffffea0001ad4008 0000000000000000
raw: 0000000000000000 0000000000000005 00000000f0000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 5, migratetype Unmovable, gfp_mask 0x152cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5598, tgid 5596 (syz-executor.0), ts 75083906453, free_ts 75211108178
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1520
 prep_new_page mm/page_alloc.c:1528 [inline]
 get_page_from_freelist+0x312a/0x3270 mm/page_alloc.c:3479
 __alloc_pages_noprof+0x29e/0x780 mm/page_alloc.c:4751
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 ___kmalloc_large_node+0x8b/0x1d0 mm/slub.c:4155
 __kmalloc_large_node_noprof+0x1a/0x80 mm/slub.c:4182
 __do_kmalloc_node mm/slub.c:4198 [inline]
 __kmalloc_node_noprof+0x2d2/0x440 mm/slub.c:4216
 __kvmalloc_node_noprof+0x72/0x1b0 mm/util.c:658
 btree_node_data_alloc+0xd3/0x260 fs/bcachefs/btree_cache.c:105
 __bch2_btree_node_mem_alloc+0x1e1/0x3b0 fs/bcachefs/btree_cache.c:150
 bch2_fs_btree_cache_init+0x269/0x570 fs/bcachefs/btree_cache.c:560
 bch2_fs_alloc fs/bcachefs/super.c:917 [inline]
 bch2_fs_open+0x2ad2/0x2fb0 fs/bcachefs/super.c:2116
 bch2_fs_get_tree+0x735/0x1700 fs/bcachefs/fs.c:2025
 vfs_get_tree+0x90/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
page last free pid 5598 tgid 5596 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1101 [inline]
 __free_pages_ok+0xa9b/0xc80 mm/page_alloc.c:1241
 __folio_put+0x2c7/0x440 mm/swap.c:126
 folio_put include/linux/mm.h:1468 [inline]
 free_large_kmalloc+0x105/0x1c0 mm/slub.c:4644
 kfree+0x211/0x3e0 mm/slub.c:4667
 btree_bounce_free fs/bcachefs/btree_io.c:112 [inline]
 bch2_btree_node_read_done+0x3bc1/0x5d60 fs/bcachefs/btree_io.c:1209
 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1323
 bch2_btree_node_read+0x2433/0x2a10
 __bch2_btree_root_read fs/bcachefs/btree_io.c:1749 [inline]
 bch2_btree_root_read+0x626/0x980 fs/bcachefs/btree_io.c:1773
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x24ac/0x38b0 fs/bcachefs/recovery.c:851
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd65/0x1700 fs/bcachefs/fs.c:2038
 vfs_get_tree+0x90/0x2b0 fs/super.c:1800
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4055 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83

Memory state around the buggy address:
 ffff88806cdfff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806cdfff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806ce00000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff88806ce00080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff88806ce00100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================