loop5: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-out-of-bounds in dtSearc[ 252.933861][ T7599] BUG: KASAN: slab-out-of-bounds in ciCompare fs/jfs/jfs_dtree.c:3428 [inline] BUG: KASAN: slab-out-of-bounds in dtSearc[ 252.933861][ T7599] BUG: KASAN: slab-out-of-bounds in dtSearch+0x16b4/0x21b0 fs/jfs/jfs_dtree.c:645 Read of size 1 at addr ffff88805e643964 by task syz.5.259/7599 CPU: 1 UID: 0 PID: 7599 Comm: syz.5.259 Tainted: G W 6.16.0-syzkaller-08685-g260f6f4fda93 #0 PREEMPT_{RT,(full)} Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 ciCompare fs/jfs/jfs_dtree.c:3428 [inline] dtSearch+0x16b4/0x21b0 fs/jfs/jfs_dtree.c:645 jfs_lookup+0x155/0x380 fs/jfs/namei.c:1461 lookup_one_qstr_excl+0x12e/0x360 fs/namei.c:1697 filename_create+0x224/0x3c0 fs/namei.c:4140 do_mknodat+0x184/0x4d0 fs/namei.c:4272 __do_sys_mknod fs/namei.c:4318 [inline] __se_sys_mknod fs/namei.c:4316 [inline] __x64_sys_mknod+0x8c/0xa0 fs/namei.c:4316 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: 0033:0x7efcdb62eb69 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:00007efcd9496038 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 00007efcdb855fa0 RCX: 00007efcdb62eb69 RDX: 000000000000070b RSI: 0000000000002480 RDI: 0000200000000200 RBP: 00007efcdb6b1df1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007efcdb855fa0 R15: 00007ffdb476b728 The buggy address belongs to the object at ffff88805e643110 which belongs to the cache jfs_ip of size 2384 The buggy address is located 2132 bytes inside of allocated 2384-byte region [ffff88805e643110, ffff88805e643a60) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e640 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888050cdb301 flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff88801e7e18c0 dead000000000122 0000000000000000 raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888050cdb301 head: 0080000000000040 ffff88801e7e18c0 dead000000000122 0000000000000000 head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888050cdb301 head: 0080000000000003 ffffea0001799001 00000000ffffffff 00000000ffffffff head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7599, tgid 7598 (syz.5.259), ts 252905071562, free_ts 158008804374 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+0x2119/0x21b0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2419 alloc_slab_page mm/slub.c:2486 [inline] allocate_slab+0x8a/0x370 mm/slub.c:2654 new_slab mm/slub.c:2708 [inline] ___slab_alloc+0x8d1/0xdd0 mm/slub.c:3890 __slab_alloc mm/slub.c:3980 [inline] __slab_alloc_node mm/slub.c:4055 [inline] slab_alloc_node mm/slub.c:4216 [inline] kmem_cache_alloc_lru_noprof+0xea/0x310 mm/slub.c:4247 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105 alloc_inode+0x6a/0x1b0 fs/inode.c:346 new_inode+0x22/0x170 fs/inode.c:1145 diReadSpecial+0x52/0x710 fs/jfs/jfs_imap.c:426 jfs_mount+0x73/0x870 fs/jfs/jfs_mount.c:87 jfs_fill_super+0x6bc/0xd80 fs/jfs/super.c:523 get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1692 vfs_get_tree+0x8f/0x2b0 fs/super.c:1815 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3805 page last free pid 5825 tgid 5825 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_pages_ok+0x9b4/0xb80 mm/page_alloc.c:1424 __free_frozen_pages+0x12d/0xdf0 mm/page_alloc.c:2702 free_large_kmalloc+0x13a/0x1f0 mm/slub.c:4804 __btree_node_data_free+0x2bb/0x3a0 fs/bcachefs/btree_cache.c:107 btree_node_data_free+0x13f/0x340 fs/bcachefs/btree_cache.c:122 bch2_fs_btree_cache_exit+0x9c1/0x13c0 fs/bcachefs/btree_cache.c:609 __bch2_fs_free fs/bcachefs/super.c:619 [inline] bch2_fs_release+0x2bb/0x830 fs/bcachefs/super.c:667 kobject_cleanup lib/kobject.c:689 [inline] kobject_release lib/kobject.c:720 [inline] kref_put include/linux/kref.h:65 [inline] kobject_put+0x22b/0x480 lib/kobject.c:737 deactivate_locked_super+0xbc/0x130 fs/super.c:474 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1378 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:224 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff88805e643800: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805e643880: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88805e643900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88805e643980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88805e643a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================