loop0: detected capacity change from 0 to 32768 bcachefs (loop0): mounting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,nojournal_transaction_names bcachefs (loop0): recovering from clean shutdown, journal seq 10 ================================================================== 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 40 at addr ffff8880742e0000 by task syz-executor.0/5451 CPU: 1 PID: 5451 Comm: syz-executor.0 Not tainted 6.10.0-rc2-syzkaller-00315-gdc772f8237f9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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:108 [inline] do_encrypt+0x4ef/0x7d0 fs/bcachefs/checksum.c:128 bset_encrypt fs/bcachefs/btree_io.h:118 [inline] bch2_btree_node_read_done+0x185b/0x6750 fs/bcachefs/btree_io.c:1129 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1345 bch2_btree_node_read+0x2433/0x2a10 __bch2_btree_root_read fs/bcachefs/btree_io.c:1769 [inline] bch2_btree_root_read+0x61e/0x970 fs/bcachefs/btree_io.c:1793 read_btree_roots+0x22d/0x7b0 fs/bcachefs/recovery.c:475 bch2_fs_recovery+0x2346/0x3720 fs/bcachefs/recovery.c:803 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1031 bch2_fs_open+0xa8d/0xdf0 fs/bcachefs/super.c:2123 bch2_mount+0x6c0/0x1320 fs/bcachefs/fs.c:1917 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 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: 0033:0x7f496107f3aa 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:00007f4961dbeef8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f4961dbef80 RCX: 00007f496107f3aa RDX: 0000000020011a00 RSI: 0000000020011a40 RDI: 00007f4961dbef40 RBP: 0000000020011a00 R08: 00007f4961dbef80 R09: 0000000001200014 R10: 0000000001200014 R11: 0000000000000246 R12: 0000000020011a40 R13: 00007f4961dbef40 R14: 00000000000119f9 R15: 0000000020000100 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x742e0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888015eee8c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000070007 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015eee8c0 dead000000000122 0000000000000000 head: 0000000000000000 0000000000070007 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0001d0b801 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5476, tgid 5476 (dhcpcd-run-hook), ts 82631388974, free_ts 82551746102 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2e43/0x2f00 mm/page_alloc.c:3420 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2265 allocate_slab+0x5a/0x2f0 mm/slub.c:2428 new_slab mm/slub.c:2481 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667 __slab_alloc+0x58/0xa0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4008 getname_flags+0xbd/0x4f0 fs/namei.c:139 do_sys_openat2+0xd2/0x1d0 fs/open.c:1399 do_sys_open fs/open.c:1420 [inline] __do_sys_openat fs/open.c:1436 [inline] __se_sys_openat fs/open.c:1431 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1431 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 page last free pid 5451 tgid 5450 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] __free_pages_ok+0xb46/0xcb0 mm/page_alloc.c:1208 __folio_put+0x3b9/0x620 mm/swap.c:129 folio_put include/linux/mm.h:1508 [inline] free_large_kmalloc+0x105/0x1c0 mm/slub.c:4529 kfree+0x1c4/0x360 mm/slub.c:4552 btree_bounce_free fs/bcachefs/btree_io.c:118 [inline] bch2_btree_node_read_done+0x3e8b/0x6750 fs/bcachefs/btree_io.c:1220 btree_node_read_work+0x68b/0x1260 fs/bcachefs/btree_io.c:1345 bch2_btree_node_read+0x2433/0x2a10 __bch2_btree_root_read fs/bcachefs/btree_io.c:1769 [inline] bch2_btree_root_read+0x61e/0x970 fs/bcachefs/btree_io.c:1793 read_btree_roots+0x22d/0x7b0 fs/bcachefs/recovery.c:475 bch2_fs_recovery+0x2346/0x3720 fs/bcachefs/recovery.c:803 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1031 bch2_fs_open+0xa8d/0xdf0 fs/bcachefs/super.c:2123 bch2_mount+0x6c0/0x1320 fs/bcachefs/fs.c:1917 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 Memory state around the buggy address: ffff8880742dff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880742dff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8880742e0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880742e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880742e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================