done bcachefs (loop0): check_indirect_extents... done bcachefs (loop0): check_dirents... bcachefs (loop0): hash table key at wrong offset: should be at 1156460114154118077 u64s 7 type dirent 4096:189491840996961599:U32_MAX len 0 ver 0: file0 -> 4098 type dir, fixing bcachefs (loop0): dirent points to missing inode: u64s 7 type dirent 4096:1156460114154118077:U32_MAX len 0 ver 0: file0 -> 4098 type dir, fixing bcachefs (loop0): hash table key at wrong offset: should be at 7940636618472695337 u64s 7 type dirent 4096:1896155912177158345:U32_MAX len 0 ver 0: file3 -> 536870913 type reg, fixing bcachefs (loop0): hash table key at wrong offset: should be at 5332773422870276894 u64s 7 type dirent 4096:2695648408715017799:U32_MAX len 0 ver 0: file2 -> 536870913 type reg, fixing bcachefs (loop0): hash table key at wrong offset: should be at 3255617022301071799 u64s 7 type dirent 4096:4330382808765833931:U32_MAX len 0 ver 0: file1 -> 536870912 type reg, fixing bcachefs (loop0): inode 536870913:4294967295 has wrong backpointer: got 0:5332773422870276894 should be 4096:5332773422870276894, fixing bcachefs (loop0): inode 536870913:4294967295 type reg has multiple links but i_nlink 0 u64s 7 type dirent 4096:7940636618472695337:U32_MAX len 0 ver 0: file3 -> 536870913 type reg u64s 7 type dirent 4096:5332773422870276894:U32_MAX len 0 ver 0: file2 -> 536870913 type reg, fixing bcachefs (loop0): hash table key at wrong offset: should be at 2950079037446857271 u64s 8 type dirent 4096:8130059955150870709:U32_MAX len 0 ver 0: lost+found -> 4097 type dir, fixing bcachefs (loop0): hash table key at wrong offset: should be at 1226914193389872777 u64s 8 type dirent 4096:9097378837824744618:U32_MAX len 0 ver 0: file.cold -> 536870914 type reg, fixing bcachefs (loop0): directory 4096:4294967295 with wrong i_nlink: got 0, should be 1, fixing bcachefs (loop0): hash table key at wrong offset: should be at 7160597411514769168 u64s 7 type dirent 4098:5675548428000973578:U32_MAX len 0 ver 0: file1 -> 4100 type lnk, fixing bcachefs (loop0): inode 4100:4294967295 has wrong backpointer: got 0:7160597411514769168 should be 4098:7160597411514769168, fixing bcachefs (loop0): incorrect d_type: got lnk, should be reg: u64s 7 type dirent 4098:7160597411514769168:U32_MAX len 0 ver 0: file1 -> 4100 type lnk, fixing bcachefs (loop0): hash table key at wrong offset: should be at 5821258563491939297 u64s 7 type dirent 4098:8977922886548783724:U32_MAX len 0 ver 0: file0 -> 4099 type reg, fixing bcachefs (loop0): check_dirents requires second pass bcachefs (loop0): inode 536870914:4294967295 has wrong backpointer: got 0:1226914193389872777 should be 4096:1226914193389872777, fixing bcachefs (loop0): dirent points to missing inode: u64s 8 type dirent 4096:2950079037446857271:U32_MAX len 0 ver 0: lost+found -> 4097 type dir, fixing bcachefs (loop0): inode 536870912:4294967295 has wrong backpointer: got 0:3255617022301071799 should be 4096:3255617022301071799, fixing bcachefs (loop0): directory 4096:4294967295 with wrong i_nlink: got 1, should be 0, fixing bcachefs (loop0): dirent points to missing inode: u64s 7 type dirent 4098:5821258563491939297:U32_MAX len 0 ver 0: file0 -> 4099 type reg, fixing done bcachefs (loop0): check_xattrs... bcachefs (loop0): hash table key at wrong offset: should be at 8969581541486972395 u64s 7 type xattr 536870912:3798421620223919902:U32_MAX len 0 ver 0: user.xattr2:xattr2, 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 ffff88804336a628 by task syz.0.0/5333 CPU: 0 UID: 0 PID: 5333 Comm: syz.0.0 Not tainted 6.16.0-rc1-syzkaller-00203-g4774cfe3543a #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] check_xattr fs/bcachefs/fsck.c:2383 [inline] bch2_check_xattrs+0x933/0xcc0 fs/bcachefs/fsck.c:2396 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x392/0x1010 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x25fd/0x3950 fs/bcachefs/recovery.c:989 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1203 bch2_fs_get_tree+0xb02/0x14f0 fs/bcachefs/fs.c:2489 vfs_get_tree+0x8f/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3885 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 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: 0033:0x7fb848d900ca Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 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:00007fb849bd8e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb849bd8ef0 RCX: 00007fb848d900ca RDX: 00002000000000c0 RSI: 0000200000000040 RDI: 00007fb849bd8eb0 RBP: 00002000000000c0 R08: 00007fb849bd8ef0 R09: 0000000000800043 R10: 0000000000800043 R11: 0000000000000246 R12: 0000200000000040 R13: 00007fb849bd8eb0 R14: 000000000000594f R15: 0000200000000100 Allocated by task 5333: 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] check_xattr fs/bcachefs/fsck.c:2383 [inline] bch2_check_xattrs+0x933/0xcc0 fs/bcachefs/fsck.c:2396 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x392/0x1010 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x25fd/0x3950 fs/bcachefs/recovery.c:989 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1203 bch2_fs_get_tree+0xb02/0x14f0 fs/bcachefs/fs.c:2489 vfs_get_tree+0x8f/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3885 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 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 5333: 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] check_xattr fs/bcachefs/fsck.c:2383 [inline] bch2_check_xattrs+0x933/0xcc0 fs/bcachefs/fsck.c:2396 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x392/0x1010 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x25fd/0x3950 fs/bcachefs/recovery.c:989 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1203 bch2_fs_get_tree+0xb02/0x14f0 fs/bcachefs/fs.c:2489 vfs_get_tree+0x8f/0x2b0 fs/super.c:1802 do_new_mount+0x24a/0xa40 fs/namespace.c:3885 do_mount fs/namespace.c:4222 [inline] __do_sys_mount fs/namespace.c:4433 [inline] __se_sys_mount+0x317/0x410 fs/namespace.c:4410 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 ffff88804336a600 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 40 bytes inside of freed 128-byte region [ffff88804336a600, ffff88804336a680) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4336a flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff88801a441a00 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080100010 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5333, tgid 5332 (syz.0.0), ts 91213435563, free_ts 91147880069 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_track_caller_noprof+0x2f8/0x4e0 mm/slub.c:4347 __do_krealloc mm/slub.c:4905 [inline] krealloc_noprof+0x124/0x340 mm/slub.c:4958 bch2_printbuf_make_room+0x1f5/0x360 fs/bcachefs/printbuf.c:59 bch2_prt_printf+0x282/0x740 fs/bcachefs/printbuf.c:186 bch2_bkey_val_to_text+0x83/0x150 fs/bcachefs/bkey_methods.c:330 check_dirent fs/bcachefs/fsck.c:2253 [inline] bch2_check_dirents+0x231f/0x3390 fs/bcachefs/fsck.c:2326 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:485 [inline] __bch2_run_recovery_passes+0x392/0x1010 fs/bcachefs/recovery_passes.c:540 bch2_run_recovery_passes+0x184/0x210 fs/bcachefs/recovery_passes.c:611 bch2_fs_recovery+0x25fd/0x3950 fs/bcachefs/recovery.c:989 bch2_fs_start+0xa99/0xd90 fs/bcachefs/super.c:1203 page last free pid 5333 tgid 5332 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 rcu_do_batch kernel/rcu/tree.c:2576 [inline] rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832 handle_softirqs+0x286/0x870 kernel/softirq.c:579 __do_softirq kernel/softirq.c:613 [inline] invoke_softirq kernel/softirq.c:453 [inline] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Memory state around the buggy address: ffff88804336a500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88804336a580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88804336a600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88804336a680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88804336a700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================