bcachefs (loop0): mounting version 1.7: mi_btree_bitmap opts=compression=lz4,background_compression=zstd,nojournal_transaction_names,nocow bcachefs (loop0): recovering from clean shutdown, journal seq 15 ================================================================== 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 ffff88805cd20000 by task syz.0.23/5271 CPU: 1 PID: 5271 Comm: syz.0.23 Not tainted 6.10.0-rc7-syzkaller-00266-g4d145e3f830b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 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+0x1ed6/0x6750 fs/bcachefs/btree_io.c:1088 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/0x7c0 fs/bcachefs/recovery.c:481 bch2_fs_recovery+0x235c/0x3730 fs/bcachefs/recovery.c:809 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1038 bch2_fs_open+0xa8d/0xdf0 fs/bcachefs/super.c:2135 bch2_mount+0x6b0/0x13c0 fs/bcachefs/fs.c:1932 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 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: 0033:0x7f10b39772da Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 7e 1a 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f10b4773e78 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f10b4773f00 RCX: 00007f10b39772da RDX: 000000002000fec0 RSI: 0000000020000000 RDI: 00007f10b4773ec0 RBP: 000000002000fec0 R08: 00007f10b4773f00 R09: 0000000001800800 R10: 0000000001800800 R11: 0000000000000206 R12: 0000000020000000 R13: 00007f10b4773ec0 R14: 000000000000fe88 R15: 00000000200001c0 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5cd20 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 ffff888015042140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888015042140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001ffffefff 0000000000000000 head: 00fff00000000003 ffffea0001734801 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 0x1d2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5161, tgid 5161 (kworker/0:5), ts 70581643878, free_ts 70166534118 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1473 prep_new_page mm/page_alloc.c:1481 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3425 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4683 __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:3990 [inline] __do_kmalloc_node mm/slub.c:4122 [inline] kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4143 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:597 __alloc_skb+0x1f3/0x440 net/core/skbuff.c:666 alloc_skb include/linux/skbuff.h:1308 [inline] nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline] nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline] nsim_dev_trap_report_work+0x254/0xaa0 drivers/net/netdevsim/dev.c:850 process_one_work kernel/workqueue.c:3248 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 page last free pid 5271 tgid 5270 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1093 [inline] __free_pages_ok+0xb46/0xcb0 mm/page_alloc.c:1213 __folio_put+0x3b9/0x620 mm/swap.c:129 folio_put include/linux/mm.h:1513 [inline] free_large_kmalloc+0x105/0x1c0 mm/slub.c:4530 kfree+0x1c4/0x360 mm/slub.c:4553 btree_bounce_free fs/bcachefs/btree_io.c:118 [inline] bch2_btree_node_read_done+0x3e8f/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/0x7c0 fs/bcachefs/recovery.c:481 bch2_fs_recovery+0x235c/0x3730 fs/bcachefs/recovery.c:809 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1038 bch2_fs_open+0xa8d/0xdf0 fs/bcachefs/super.c:2135 bch2_mount+0x6b0/0x13c0 fs/bcachefs/fs.c:1932 legacy_get_tree+0xee/0x190 fs/fs_context.c:662 vfs_get_tree+0x90/0x2a0 fs/super.c:1789 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 Memory state around the buggy address: ffff88805cd1ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805cd1ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805cd20000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805cd20080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805cd20100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================