read_mapping_page failed! ERROR: (device loop2): txCommit: jfs_create: dtSearch returned -17 ================================================================== BUG: KASAN: slab-out-of-bounds in dtInsertEntry+0xe8b/0x13e0 fs/jfs/jfs_dtree.c:3753 Read of size 4 at addr ffff88805e49adcc by task syz.2.920/10723 CPU: 1 PID: 10723 Comm: syz.2.920 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xac/0x220 mm/kasan/report.c:468 kasan_report+0x117/0x150 mm/kasan/report.c:581 dtInsertEntry+0xe8b/0x13e0 fs/jfs/jfs_dtree.c:3753 dtSplitPage+0x2a66/0x3b10 fs/jfs/jfs_dtree.c:1596 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline] dtInsert+0x108f/0x5f40 fs/jfs/jfs_dtree.c:871 jfs_mkdir+0x6c6/0xa30 fs/jfs/namei.c:270 vfs_mkdir+0x296/0x440 fs/namei.c:4121 do_mkdirat+0x1d4/0x440 fs/namei.c:4144 __do_sys_mkdirat fs/namei.c:4159 [inline] __se_sys_mkdirat fs/namei.c:4157 [inline] __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4157 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7effec58f749 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:00007effed40f038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102 RAX: ffffffffffffffda RBX: 00007effec7e5fa0 RCX: 00007effec58f749 RDX: 0000000000000181 RSI: 0000200000000100 RDI: ffffffffffffff9c RBP: 00007effec613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007effec7e6038 R14: 00007effec7e5fa0 R15: 00007ffdc2706828 Allocated by task 10723: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4e/0x70 mm/kasan/common.c:52 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc_lru+0x115/0x2e0 mm/slub.c:3526 alloc_inode_sb include/linux/fs.h:2946 [inline] jfs_alloc_inode+0x28/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] iget_locked+0x1ad/0x840 fs/inode.c:1359 jfs_iget+0x24/0x440 fs/jfs/inode.c:29 jfs_lookup+0x1c6/0x380 fs/jfs/namei.c:1467 __lookup_slow+0x281/0x3b0 fs/namei.c:1702 lookup_slow+0x53/0x70 fs/namei.c:1719 walk_component+0x2be/0x3f0 fs/namei.c:2010 lookup_last fs/namei.c:2467 [inline] path_lookupat+0x169/0x440 fs/namei.c:2491 filename_lookup+0x1f4/0x510 fs/namei.c:2520 user_path_at_empty+0x42/0x60 fs/namei.c:2917 user_path_at include/linux/namei.h:57 [inline] __do_sys_chdir fs/open.c:551 [inline] __se_sys_chdir+0x95/0x290 fs/open.c:545 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2721 [inline] call_rcu+0x158/0x930 kernel/rcu/tree.c:2837 destroy_inode fs/inode.c:316 [inline] evict+0x7db/0x870 fs/inode.c:720 dispose_list fs/inode.c:738 [inline] evict_inodes+0x5fe/0x690 fs/inode.c:792 generic_shutdown_super+0x97/0x2b0 fs/super.c:672 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1259 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 Second to last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:492 __call_rcu_common kernel/rcu/tree.c:2721 [inline] call_rcu+0x158/0x930 kernel/rcu/tree.c:2837 destroy_inode fs/inode.c:316 [inline] evict+0x7db/0x870 fs/inode.c:720 dispose_list fs/inode.c:738 [inline] evict_inodes+0x5fe/0x690 fs/inode.c:792 generic_shutdown_super+0x97/0x2b0 fs/super.c:672 kill_block_super+0x44/0x90 fs/super.c:1660 deactivate_locked_super+0x97/0x100 fs/super.c:481 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1259 task_work_run+0x1ce/0x250 kernel/task_work.c:239 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x68/0xd2 The buggy address belongs to the object at ffff88805e49a500 which belongs to the cache jfs_ip of size 2240 The buggy address is located 12 bytes to the right of allocated 2240-byte region [ffff88805e49a500, ffff88805e49adc0) The buggy address belongs to the physical page: page:ffffea0001792600 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88805e498000 pfn:0x5e498 head:ffffea0001792600 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88805baa8b01 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888142a87640 dead000000000122 0000000000000000 raw: ffff88805e498000 00000000800d0007 00000001ffffffff ffff88805baa8b01 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 6391, tgid 6390 (syz.4.54), ts 149954396400, free_ts 143074853877 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1cd/0x210 mm/page_alloc.c:1554 prep_new_page mm/page_alloc.c:1561 [inline] get_page_from_freelist+0x195c/0x19f0 mm/page_alloc.c:3191 __alloc_pages+0x1e3/0x460 mm/page_alloc.c:4457 alloc_slab_page+0x5d/0x170 mm/slub.c:1881 allocate_slab mm/slub.c:2028 [inline] new_slab+0x87/0x2e0 mm/slub.c:2081 ___slab_alloc+0xc6d/0x1300 mm/slub.c:3253 __slab_alloc mm/slub.c:3339 [inline] __slab_alloc_node mm/slub.c:3392 [inline] slab_alloc_node mm/slub.c:3485 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc_lru+0x1ae/0x2e0 mm/slub.c:3526 alloc_inode_sb include/linux/fs.h:2946 [inline] jfs_alloc_inode+0x28/0x60 fs/jfs/super.c:105 alloc_inode fs/inode.c:261 [inline] new_inode_pseudo+0x63/0x1d0 fs/inode.c:1049 new_inode+0x22/0x1b0 fs/inode.c:1075 diReadSpecial+0x52/0x710 fs/jfs/jfs_imap.c:426 jfs_mount+0x73/0x860 fs/jfs/jfs_mount.c:87 jfs_fill_super+0x4e2/0xac0 fs/jfs/super.c:556 mount_bdev+0x22b/0x2d0 fs/super.c:1643 legacy_get_tree+0xea/0x180 fs/fs_context.c:662 vfs_get_tree+0x8c/0x280 fs/super.c:1764 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1154 [inline] free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336 free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429 discard_slab mm/slub.c:2127 [inline] __unfreeze_partials+0x1cf/0x210 mm/slub.c:2667 put_cpu_partial+0x17c/0x250 mm/slub.c:2743 __slab_free+0x31d/0x410 mm/slub.c:3700 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x143/0x160 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767 slab_alloc_node mm/slub.c:3495 [inline] slab_alloc mm/slub.c:3503 [inline] __kmem_cache_alloc_lru mm/slub.c:3510 [inline] kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519 ptlock_alloc mm/memory.c:6177 [inline] ptlock_init include/linux/mm.h:2964 [inline] pmd_ptlock_init include/linux/mm.h:3064 [inline] pagetable_pmd_ctor include/linux/mm.h:3102 [inline] pmd_alloc_one include/asm-generic/pgalloc.h:137 [inline] __pmd_alloc+0x116/0x880 mm/memory.c:5599 pmd_alloc include/linux/mm.h:2863 [inline] alloc_new_pmd mm/mremap.c:96 [inline] move_page_tables+0x1758/0x1910 mm/mremap.c:555 shift_arg_pages fs/exec.c:713 [inline] setup_arg_pages+0xb38/0xed0 fs/exec.c:836 load_elf_binary+0xb98/0x2700 fs/binfmt_elf.c:1045 search_binary_handler fs/exec.c:1775 [inline] exec_binprm fs/exec.c:1817 [inline] bprm_execve+0xaeb/0x16f0 fs/exec.c:1892 do_execveat_common+0x51b/0x6c0 fs/exec.c:1998 Memory state around the buggy address: ffff88805e49ac80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88805e49ad00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88805e49ad80: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc ^ ffff88805e49ae00: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 ffff88805e49ae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================