bi_subvol=0 bi_parent_subvol=0 bi_nocow=0 bi_depth=0 bi_inodes_32bit=0 bi_casefold=0, fixing bcachefs (loop0): inode points to missing dirent inum: 536870914:4294967295 mode=100755 flags=(15300000) journal_seq=4 hash_seed=d483206f1ed95abf hash_type=siphash bi_size=100 bi_sectors=8 bi_version=0 bi_atime=2780562352 bi_ctime=2780562352 bi_mtime=2780562352 bi_otime=2780562352 bi_uid=0 bi_gid=0 bi_nlink=0 bi_generation=0 bi_dev=0 bi_data_checksum=0 bi_compression=0 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=4096 bi_dir_offset=16447253429693394090 bi_subvol=0 bi_parent_subvol=0 bi_nocow=0 bi_depth=0 bi_inodes_32bit=0 bi_casefold=0, fixing done bcachefs (loop0): resume_logged_ops... done bcachefs (loop0): delete_dead_inodes... done bcachefs (loop0): done starting filesystem bcachefs (loop0): hash table key at wrong offset: should be at 2708803927 u64s 7 type dirent 4096:189491840996961599:U32_MAX len 0 ver 0: file0 -> 4098 type dir, fixing ================================================================== BUG: KASAN: slab-use-after-free in bch2_str_hash_repair_key+0x2d42/0x3fa0 fs/bcachefs/str_hash.c:335 Read of size 8 at addr ffff888038221528 by task syz.0.0/5324 CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.16.0-rc3-syzkaller-00072-gee88bddf7f2f #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_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report+0x118/0x150 mm/kasan/report.c:634 bch2_str_hash_repair_key+0x2d42/0x3fa0 fs/bcachefs/str_hash.c:335 __bch2_str_hash_check_key+0xa65/0xd40 fs/bcachefs/str_hash.c:394 bch2_str_hash_check_key fs/bcachefs/str_hash.h:429 [inline] bch2_readdir+0x11cd/0x16f0 fs/bcachefs/dirent.c:685 bch2_vfs_readdir+0x4d0/0x6c0 fs/bcachefs/fs.c:1581 iterate_dir+0x5ac/0x770 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:326 [inline] __se_sys_getdents+0xe4/0x250 fs/readdir.c:312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f81a778e929 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:00007f81a861e038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f81a79b5fa0 RCX: 00007f81a778e929 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f81a7810b39 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f81a79b5fa0 R15: 00007ffebde685a8 Allocated by task 5324: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4328 [inline] __kmalloc_node_track_caller_noprof+0x271/0x4e0 mm/slub.c:4347 __do_krealloc mm/slub.c:4905 [inline] krealloc_noprof+0x124/0x340 mm/slub.c:4958 __bch2_trans_kmalloc+0x26c/0xc80 fs/bcachefs/btree_iter.c:3187 bch2_trans_kmalloc_ip fs/bcachefs/btree_iter.h:604 [inline] bch2_trans_kmalloc fs/bcachefs/btree_iter.h:616 [inline] bch2_str_hash_repair_key+0x2a65/0x3fa0 fs/bcachefs/str_hash.c:251 __bch2_str_hash_check_key+0xa65/0xd40 fs/bcachefs/str_hash.c:394 bch2_str_hash_check_key fs/bcachefs/str_hash.h:429 [inline] bch2_readdir+0x11cd/0x16f0 fs/bcachefs/dirent.c:685 bch2_vfs_readdir+0x4d0/0x6c0 fs/bcachefs/fs.c:1581 iterate_dir+0x5ac/0x770 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:326 [inline] __se_sys_getdents+0xe4/0x250 fs/readdir.c:312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5324: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x62/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2381 [inline] slab_free mm/slub.c:4643 [inline] kfree+0x18e/0x440 mm/slub.c:4842 krealloc_noprof+0x1cd/0x340 mm/slub.c:-1 __bch2_trans_kmalloc+0x26c/0xc80 fs/bcachefs/btree_iter.c:3187 bch2_trans_kmalloc_ip fs/bcachefs/btree_iter.h:604 [inline] bch2_trans_kmalloc fs/bcachefs/btree_iter.h:616 [inline] bch2_hash_delete_at fs/bcachefs/str_hash.h:364 [inline] bch2_str_hash_repair_key+0x2fde/0x3fa0 fs/bcachefs/str_hash.c:289 __bch2_str_hash_check_key+0xa65/0xd40 fs/bcachefs/str_hash.c:394 bch2_str_hash_check_key fs/bcachefs/str_hash.h:429 [inline] bch2_readdir+0x11cd/0x16f0 fs/bcachefs/dirent.c:685 bch2_vfs_readdir+0x4d0/0x6c0 fs/bcachefs/fs.c:1581 iterate_dir+0x5ac/0x770 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:326 [inline] __se_sys_getdents+0xe4/0x250 fs/readdir.c:312 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888038221500 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 40 bytes inside of freed 128-byte region [ffff888038221500, ffff888038221580) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38221 ksm flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801a441a00 ffffea0001104c40 dead000000000003 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 19584684988, free_ts 19584666858 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2451 [inline] allocate_slab+0x8a/0x3b0 mm/slub.c:2619 new_slab mm/slub.c:2673 [inline] ___slab_alloc+0xbfc/0x1480 mm/slub.c:3859 __slab_alloc mm/slub.c:3949 [inline] __slab_alloc_node mm/slub.c:4024 [inline] slab_alloc_node mm/slub.c:4185 [inline] __do_kmalloc_node mm/slub.c:4327 [inline] __kmalloc_node_noprof+0x2fd/0x4e0 mm/slub.c:4334 kmalloc_node_noprof include/linux/slab.h:932 [inline] __vmalloc_area_node mm/vmalloc.c:3690 [inline] __vmalloc_node_range_noprof+0x5a9/0x12f0 mm/vmalloc.c:3885 __vmalloc_node_noprof mm/vmalloc.c:3948 [inline] vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4022 tpg_alloc+0x2fd/0x870 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:155 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1857 [inline] vivid_probe+0x1b11/0x7180 drivers/media/test-drivers/vivid/vivid-core.c:2095 platform_probe+0x148/0x1d0 drivers/base/platform.c:1404 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26a/0x9a0 drivers/base/dd.c:657 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799 driver_probe_device+0x4f/0x430 drivers/base/dd.c:829 __driver_attach+0x452/0x700 drivers/base/dd.c:1215 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706 __kasan_populate_vmalloc mm/kasan/shadow.c:383 [inline] kasan_populate_vmalloc+0x18a/0x1a0 mm/kasan/shadow.c:417 alloc_vmap_area+0xd51/0x1490 mm/vmalloc.c:2084 __get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3179 __vmalloc_node_range_noprof+0x301/0x12f0 mm/vmalloc.c:3845 __vmalloc_node_noprof mm/vmalloc.c:3948 [inline] vzalloc_noprof+0xb2/0xf0 mm/vmalloc.c:4022 tpg_alloc+0x2fd/0x870 drivers/media/common/v4l2-tpg/v4l2-tpg-core.c:155 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1857 [inline] vivid_probe+0x1b11/0x7180 drivers/media/test-drivers/vivid/vivid-core.c:2095 platform_probe+0x148/0x1d0 drivers/base/platform.c:1404 call_driver_probe drivers/base/dd.c:-1 [inline] really_probe+0x26a/0x9a0 drivers/base/dd.c:657 __driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799 driver_probe_device+0x4f/0x430 drivers/base/dd.c:829 __driver_attach+0x452/0x700 drivers/base/dd.c:1215 bus_for_each_dev+0x230/0x2b0 drivers/base/bus.c:370 bus_add_driver+0x345/0x640 drivers/base/bus.c:678 driver_register+0x23a/0x320 drivers/base/driver.c:249 Memory state around the buggy address: ffff888038221400: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc ffff888038221480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888038221500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888038221580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888038221600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc ==================================================================