bi_project=0 bi_background_compression=0 bi_data_replicas=0 bi_promote_target=0 bi_foreground_target=0 bi_background_target=0 bi_erasure_code=0 bi_fields_set=0 bi_dir=0 bi_dir_offset=0 bi_subvol=0 bi_parent_subvol=0 bi_nocow=0 bi_depth=0 bi_inodes_32bit=0, fixing done bcachefs (loop0): check_subvolume_structure... done bcachefs (loop0): check_directory_structure... done bcachefs (loop0): check_nlinks... done bcachefs (loop0): resume_logged_ops... done bcachefs (loop0): delete_dead_inodes... done bcachefs (loop0): set_fs_needs_rebalance... done bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean bcachefs (loop0): check_alloc_info... done bcachefs (loop0): check_lrus... done bcachefs (loop0): check_btree_backpointers... done bcachefs (loop0): check_backpointers_to_extents... done bcachefs (loop0): check_extents_to_backpointers... done bcachefs (loop0): check_alloc_to_lru_refs... done bcachefs (loop0): bucket_gens_init... done bcachefs (loop0): check_snapshot_trees... done bcachefs (loop0): check_snapshots... done bcachefs (loop0): check_subvols... done bcachefs (loop0): check_subvol_children... done bcachefs (loop0): delete_dead_snapshots... done bcachefs (loop0): check_inodes... done bcachefs (loop0): check_extents... done bcachefs (loop0): check_indirect_extents... done bcachefs (loop0): check_dirents... done bcachefs (loop0): check_xattrs... done bcachefs (loop0): check_root... done bcachefs (loop0): check_unreachable_inodes... done bcachefs (loop0): check_subvolume_structure... done bcachefs (loop0): check_directory_structure... done bcachefs (loop0): check_nlinks... done bcachefs (loop0): resume_logged_ops... done bcachefs (loop0): delete_dead_inodes... done bcachefs (loop0): set_fs_needs_rebalance... done bcachefs (loop0): done starting filesystem ================================================================== BUG: KASAN: slab-use-after-free in bchfs_read+0x2ac0/0x3290 fs/bcachefs/fs-io-buffered.c:228 Read of size 4 at addr ffff88805483a148 by task syz.0.0/5329 CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-13524-gf4d2ef48250a #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __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:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 bchfs_read+0x2ac0/0x3290 fs/bcachefs/fs-io-buffered.c:228 bch2_readahead+0xe7a/0x12d0 fs/bcachefs/fs-io-buffered.c:301 read_pages+0x193/0x590 mm/readahead.c:160 page_cache_ra_order+0xa37/0xca0 mm/readahead.c:515 filemap_readahead mm/filemap.c:2559 [inline] filemap_get_pages+0x9ec/0x1fc0 mm/filemap.c:2604 filemap_read+0x466/0x1260 mm/filemap.c:2701 bch2_read_iter+0x1179/0x14b0 fs/bcachefs/fs-io-direct.c:221 __kernel_read+0x532/0xa10 fs/read_write.c:528 integrity_kernel_read+0xb2/0x100 security/integrity/iint.c:28 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0xb22/0x1c10 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x52b/0xb20 security/integrity/ima/ima_api.c:293 process_measurement+0x13a3/0x1fe0 security/integrity/ima/ima_main.c:383 ima_file_check+0xdb/0x130 security/integrity/ima/ima_main.c:611 security_file_post_open+0xb9/0x280 security/security.c:3130 do_open fs/namei.c:3847 [inline] path_openat+0x2cf7/0x35d0 fs/namei.c:4004 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x226/0x280 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f98df98d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f98e0795038 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007f98dfba5fa0 RCX: 00007f98df98d169 RDX: 0000000000000000 RSI: 000000000014927e RDI: 0000200000000180 RBP: 00007f98dfa0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f98dfba5fa0 R15: 00007ffdf50f7628 Allocated by task 5329: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_mempool_unpoison_object+0x9e/0x170 mm/kasan/common.c:547 kasan_unpoison_element mm/mempool.c:-1 [inline] remove_element+0x129/0x1a0 mm/mempool.c:150 mempool_alloc_noprof+0x552/0x5a0 mm/mempool.c:408 bio_alloc_bioset+0x26f/0x1130 block/bio.c:554 bch2_readahead+0xbaf/0x12d0 fs/bcachefs/fs-io-buffered.c:290 read_pages+0x193/0x590 mm/readahead.c:160 page_cache_ra_order+0xa37/0xca0 mm/readahead.c:515 filemap_readahead mm/filemap.c:2559 [inline] filemap_get_pages+0x9ec/0x1fc0 mm/filemap.c:2604 filemap_read+0x466/0x1260 mm/filemap.c:2701 bch2_read_iter+0x1179/0x14b0 fs/bcachefs/fs-io-direct.c:221 __kernel_read+0x532/0xa10 fs/read_write.c:528 integrity_kernel_read+0xb2/0x100 security/integrity/iint.c:28 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0xb22/0x1c10 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x52b/0xb20 security/integrity/ima/ima_api.c:293 process_measurement+0x13a3/0x1fe0 security/integrity/ima/ima_main.c:383 ima_file_check+0xdb/0x130 security/integrity/ima/ima_main.c:611 security_file_post_open+0xb9/0x280 security/security.c:3130 do_open fs/namei.c:3847 [inline] path_openat+0x2cf7/0x35d0 fs/namei.c:4004 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x226/0x280 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5329: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_mempool_poison_object+0xaa/0x120 mm/kasan/common.c:522 kasan_mempool_poison_object include/linux/kasan.h:360 [inline] kasan_poison_element mm/mempool.c:118 [inline] add_element mm/mempool.c:141 [inline] mempool_free+0x1c8/0x390 mm/mempool.c:541 bch2_readpages_end_io+0x17c/0x1d0 fs/bcachefs/fs-io-buffered.c:36 bch2_rbio_done fs/bcachefs/io_read.c:430 [inline] __bch2_read_extent+0x1348/0x4400 fs/bcachefs/io_read.c:1257 bch2_read_extent fs/bcachefs/io_read.h:140 [inline] bchfs_read+0x2379/0x3290 fs/bcachefs/fs-io-buffered.c:226 bch2_readahead+0xe7a/0x12d0 fs/bcachefs/fs-io-buffered.c:301 read_pages+0x193/0x590 mm/readahead.c:160 page_cache_ra_order+0xa37/0xca0 mm/readahead.c:515 filemap_readahead mm/filemap.c:2559 [inline] filemap_get_pages+0x9ec/0x1fc0 mm/filemap.c:2604 filemap_read+0x466/0x1260 mm/filemap.c:2701 bch2_read_iter+0x1179/0x14b0 fs/bcachefs/fs-io-direct.c:221 __kernel_read+0x532/0xa10 fs/read_write.c:528 integrity_kernel_read+0xb2/0x100 security/integrity/iint.c:28 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline] ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline] ima_calc_file_hash+0xb22/0x1c10 security/integrity/ima/ima_crypto.c:568 ima_collect_measurement+0x52b/0xb20 security/integrity/ima/ima_api.c:293 process_measurement+0x13a3/0x1fe0 security/integrity/ima/ima_main.c:383 ima_file_check+0xdb/0x130 security/integrity/ima/ima_main.c:611 security_file_post_open+0xb9/0x280 security/security.c:3130 do_open fs/namei.c:3847 [inline] path_openat+0x2cf7/0x35d0 fs/namei.c:4004 do_filp_open+0x284/0x4e0 fs/namei.c:4031 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_open fs/open.c:1452 [inline] __se_sys_open fs/open.c:1448 [inline] __x64_sys_open+0x226/0x280 fs/open.c:1448 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88805483a000 which belongs to the cache bio-488 of size 488 The buggy address is located 328 bytes inside of freed 488-byte region [ffff88805483a000, ffff88805483a1e8) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5483a head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0x4fff00000000040(head|node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000040 ffff888052a98280 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000 head: 04fff00000000040 ffff888052a98280 dead000000000122 0000000000000000 head: 0000000000000000 00000000000c000c 00000000f5000000 0000000000000000 head: 04fff00000000001 ffffea0001520e81 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000002 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5329, tgid 5328 (syz.0.0), ts 92005061633, free_ts 0 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1717 prep_new_page mm/page_alloc.c:1725 [inline] get_page_from_freelist+0x352b/0x36c0 mm/page_alloc.c:3652 __alloc_frozen_pages_noprof+0x211/0x5b0 mm/page_alloc.c:4934 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301 alloc_slab_page mm/slub.c:2459 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2623 new_slab mm/slub.c:2676 [inline] ___slab_alloc+0xc3b/0x1500 mm/slub.c:3862 __slab_alloc+0x58/0xa0 mm/slub.c:3952 __slab_alloc_node mm/slub.c:4027 [inline] slab_alloc_node mm/slub.c:4188 [inline] kmem_cache_alloc_noprof+0x270/0x390 mm/slub.c:4207 mempool_init_node+0x1ee/0x4e0 mm/mempool.c:217 mempool_init_noprof+0x3a/0x50 mm/mempool.c:246 bioset_init+0x2ea/0x820 block/bio.c:1709 bch2_fs_io_read_init+0x29/0xc0 fs/bcachefs/io_read.c:1377 bch2_fs_alloc fs/bcachefs/super.c:953 [inline] bch2_fs_open+0x2f37/0x32a0 fs/bcachefs/super.c:2219 bch2_fs_get_tree+0x77b/0x18f0 fs/bcachefs/fs.c:2172 vfs_get_tree+0x90/0x2b0 fs/super.c:1759 do_new_mount+0x2cf/0xb70 fs/namespace.c:3879 page_owner free stack trace missing Memory state around the buggy address: ffff88805483a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88805483a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88805483a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88805483a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff88805483a200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================