loop3: detected capacity change from 0 to 32768 ================================================================== BUG: KASAN: slab-use-after-free in diWrite+0x1209/0x1f40 fs/jfs/jfs_imap.c:753 Write of size 32 at addr ffff8880323f00c0 by task syz.3.20/6054 CPU: 0 UID: 0 PID: 6054 Comm: syz.3.20 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 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 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106 diWrite+0x1209/0x1f40 fs/jfs/jfs_imap.c:753 txCommit+0x852/0x5430 fs/jfs/jfs_txnmgr.c:1256 add_missing_indices+0x8ce/0xce0 fs/jfs/jfs_dtree.c:2674 jfs_readdir+0x1d92/0x3ae0 fs/jfs/jfs_dtree.c:3031 wrap_directory_iterator+0x99/0xe0 fs/readdir.c:65 iterate_dir+0x3a5/0x580 fs/readdir.c:108 __do_sys_getdents64 fs/readdir.c:410 [inline] __se_sys_getdents64+0xe4/0x260 fs/readdir.c:396 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fede211f749 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:00007fede1786038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9 RAX: ffffffffffffffda RBX: 00007fede2375fa0 RCX: 00007fede211f749 RDX: 0000000000000099 RSI: 0000200000000280 RDI: 0000000000000005 RBP: 00007fede21a3f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fede2376038 R14: 00007fede2375fa0 R15: 00007ffe1b2d9a78 Allocated by task 5913: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 unpoison_slab_object mm/kasan/common.c:342 [inline] __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:368 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x181/0x6b0 mm/slub.c:5295 mt_alloc_one lib/maple_tree.c:174 [inline] mas_dup_build+0x147/0x1260 lib/maple_tree.c:6299 __mt_dup+0x147/0x230 lib/maple_tree.c:6382 dup_mmap+0x3bd/0x1ae0 mm/mmap.c:1745 dup_mm kernel/fork.c:1489 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1541 copy_process+0x1704/0x3ae0 kernel/fork.c:2181 kernel_clone+0x224/0x7c0 kernel/fork.c:2609 __do_sys_clone kernel/fork.c:2750 [inline] __se_sys_clone kernel/fork.c:2734 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2734 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 13: kasan_save_stack mm/kasan/common.c:56 [inline] kasan_save_track+0x3e/0x80 mm/kasan/common.c:77 __kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:587 kasan_save_free_info mm/kasan/kasan.h:406 [inline] poison_slab_object mm/kasan/common.c:252 [inline] __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284 kasan_slab_free include/linux/kasan.h:234 [inline] slab_free_hook mm/slub.c:2543 [inline] slab_free_freelist_hook mm/slub.c:2572 [inline] slab_free_bulk mm/slub.c:6674 [inline] kmem_cache_free_bulk+0xace/0x1130 mm/slub.c:7358 kfree_bulk include/linux/slab.h:830 [inline] kvfree_rcu_bulk+0xe5/0x1f0 mm/slab_common.c:1522 kfree_rcu_work+0xed/0x170 mm/slab_common.c:1600 process_one_work kernel/workqueue.c:3263 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3346 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3427 kthread+0x711/0x8a0 kernel/kthread.c:463 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Last potentially related work creation: kasan_save_stack+0x3e/0x60 mm/kasan/common.c:56 kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:559 kvfree_call_rcu+0xbb/0x410 mm/slab_common.c:1995 ma_free_rcu lib/maple_tree.c:208 [inline] mas_topiary_node lib/maple_tree.c:2311 [inline] mas_topiary_replace lib/maple_tree.c:2410 [inline] mas_wmb_replace+0x10dd/0x1830 lib/maple_tree.c:2433 mas_split lib/maple_tree.c:3052 [inline] mas_commit_b_node+0xbfd/0x10a0 lib/maple_tree.c:3072 mas_wr_bnode lib/maple_tree.c:3739 [inline] mas_wr_store_entry+0x52a/0x27a0 lib/maple_tree.c:3771 mas_store_prealloc+0xaf5/0x1030 lib/maple_tree.c:5169 vma_iter_store_new mm/vma.h:488 [inline] vma_complete+0x224/0xae0 mm/vma.c:354 __split_vma+0x885/0x9e0 mm/vma.c:568 split_vma mm/vma.c:598 [inline] vma_modify+0x122c/0x1880 mm/vma.c:1623 vma_modify_flags+0x1e8/0x230 mm/vma.c:1649 mprotect_fixup+0x407/0x9c0 mm/mprotect.c:816 do_mprotect_pkey+0x8c5/0xcd0 mm/mprotect.c:990 __do_sys_mprotect mm/mprotect.c:1011 [inline] __se_sys_mprotect mm/mprotect.c:1008 [inline] __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:1008 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880323f0000 which belongs to the cache maple_node of size 256 The buggy address is located 192 bytes inside of freed 256-byte region [ffff8880323f0000, ffff8880323f0100) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x323f0 head: order:1 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0x80000000000040(head|node=0|zone=1) page_type: f5(slab) raw: 0080000000000040 ffff88813ff30c80 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 0080000000000040 ffff88813ff30c80 0000000000000000 dead000000000001 head: 0000000000000000 0000000000100010 00000000f5000000 0000000000000000 head: 0080000000000001 ffffea0000c8fc01 00000000ffffffff 00000000ffffffff head: 0000000000000000 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 5182, tgid 5182 (v4l_id), ts 32782120524, free_ts 32705628341 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x234/0x290 mm/page_alloc.c:1845 prep_new_page mm/page_alloc.c:1853 [inline] get_page_from_freelist+0x28c0/0x2960 mm/page_alloc.c:3879 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5178 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2416 alloc_slab_page mm/slub.c:3059 [inline] allocate_slab+0x96/0x350 mm/slub.c:3232 new_slab mm/slub.c:3286 [inline] ___slab_alloc+0xb10/0x1400 mm/slub.c:4655 __kmem_cache_alloc_bulk+0x1c0/0x5a0 mm/slub.c:7406 refill_sheaf mm/slub.c:2637 [inline] kmem_cache_prefill_sheaf+0x2ea/0x470 mm/slub.c:5419 mt_get_sheaf lib/maple_tree.c:189 [inline] mas_alloc_nodes+0x1c2/0x350 lib/maple_tree.c:1140 mas_preallocate+0x2e0/0x670 lib/maple_tree.c:5194 vma_iter_prealloc mm/vma.h:442 [inline] __split_vma+0x2fd/0x9e0 mm/vma.c:528 split_vma mm/vma.c:598 [inline] vma_modify+0x1328/0x1880 mm/vma.c:1631 vma_modify_flags+0x1e8/0x230 mm/vma.c:1649 mprotect_fixup+0x407/0x9c0 mm/mprotect.c:816 do_mprotect_pkey+0x8c5/0xcd0 mm/mprotect.c:990 __do_sys_mprotect mm/mprotect.c:1011 [inline] __se_sys_mprotect mm/mprotect.c:1008 [inline] __x64_sys_mprotect+0x80/0x90 mm/mprotect.c:1008 page last free pid 5168 tgid 5168 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1394 [inline] __free_frozen_pages+0xfb6/0x1140 mm/page_alloc.c:2901 discard_slab mm/slub.c:3330 [inline] __put_partials+0x149/0x170 mm/slub.c:3876 __slab_free+0x29e/0x370 mm/slub.c:5929 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:352 kasan_slab_alloc include/linux/kasan.h:252 [inline] slab_post_alloc_hook mm/slub.c:4978 [inline] slab_alloc_node mm/slub.c:5288 [inline] kmem_cache_alloc_noprof+0x181/0x6b0 mm/slub.c:5295 getname_flags+0xb8/0x540 fs/namei.c:146 do_readlinkat+0xbc/0x500 fs/stat.c:575 __do_sys_readlink fs/stat.c:613 [inline] __se_sys_readlink fs/stat.c:610 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:610 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff8880323eff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8880323f0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880323f0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880323f0100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880323f0180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================