ocfs2: Mounting device (7,2) on (node local, slot 0) with ordered data mode. ================================================================== BUG: KASAN: slab-use-after-free in ocfs2_dir_foreach_blk_id fs/ocfs2/dir.c:1787 [inline] BUG: KASAN: slab-use-after-free in ocfs2_dir_foreach_blk+0x132c/0x1b20 fs/ocfs2/dir.c:1925 Read of size 2 at addr ffff8880770928c9 by task syz.2.18/6107 CPU: 1 UID: 0 PID: 6107 Comm: syz.2.18 Not tainted 6.13.0-syzkaller-09793-g69b8923f5003 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 ocfs2_dir_foreach_blk_id fs/ocfs2/dir.c:1787 [inline] ocfs2_dir_foreach_blk+0x132c/0x1b20 fs/ocfs2/dir.c:1925 ocfs2_readdir+0x2a1/0x5e0 fs/ocfs2/dir.c:1969 wrap_directory_iterator+0x91/0xd0 fs/readdir.c:65 iterate_dir+0x5a9/0x760 fs/readdir.c:108 __do_sys_getdents fs/readdir.c:322 [inline] __se_sys_getdents+0x1fd/0x4e0 fs/readdir.c:308 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f85ad98cda9 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:00007f85ae7df038 EFLAGS: 00000246 ORIG_RAX: 000000000000004e RAX: ffffffffffffffda RBX: 00007f85adba5fa0 RCX: 00007f85ad98cda9 RDX: 0000000000000054 RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00007f85ada0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f85adba5fa0 R15: 00007ffdfd3af3b8 Allocated by task 6030: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4171 anon_vma_alloc mm/rmap.c:94 [inline] anon_vma_fork+0xe8/0x580 mm/rmap.c:360 dup_mmap kernel/fork.c:711 [inline] dup_mm kernel/fork.c:1689 [inline] copy_mm+0xdc2/0x2110 kernel/fork.c:1741 copy_process+0x1845/0x3d50 kernel/fork.c:2392 kernel_clone+0x223/0x870 kernel/fork.c:2804 __do_sys_clone kernel/fork.c:2947 [inline] __se_sys_clone kernel/fork.c:2931 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2931 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 24: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free_after_rcu_debug+0x11a/0x280 mm/slub.c:4659 rcu_do_batch kernel/rcu/tree.c:2546 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2802 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:561 run_ksoftirqd+0xca/0x130 kernel/softirq.c:950 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x7a9/0x920 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 kasan_record_aux_stack+0xaa/0xc0 mm/kasan/generic.c:548 slab_free_hook mm/slub.c:2314 [inline] slab_free mm/slub.c:4609 [inline] kmem_cache_free+0x2fb/0x410 mm/slub.c:4711 anon_vma_free mm/rmap.c:137 [inline] __put_anon_vma+0x128/0x2d0 mm/rmap.c:2568 put_anon_vma include/linux/rmap.h:116 [inline] unlink_anon_vmas+0x492/0x5f0 mm/rmap.c:444 free_pgtables+0x567/0x840 mm/memory.c:408 exit_mmap+0x522/0xd40 mm/mmap.c:1295 __mmput+0x115/0x410 kernel/fork.c:1345 exit_mm+0x220/0x310 kernel/exit.c:570 do_exit+0x9ad/0x28e0 kernel/exit.c:925 do_group_exit+0x207/0x2c0 kernel/exit.c:1087 __do_sys_exit_group kernel/exit.c:1098 [inline] __se_sys_exit_group kernel/exit.c:1096 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1096 x64_sys_call+0x26a8/0x26b0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888077092880 which belongs to the cache anon_vma of size 208 The buggy address is located 73 bytes inside of freed 208-byte region [ffff888077092880, ffff888077092950) The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77092 memcg:ffff8880770aae01 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000000 ffff88801be82140 dead000000000122 0000000000000000 raw: 0000000000000000 00000000000f000f 00000000f5000000 ffff8880770aae01 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 6045, tgid 6045 (modprobe), ts 93193391468, free_ts 87808851896 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551 prep_new_page mm/page_alloc.c:1559 [inline] get_page_from_freelist+0x3651/0x37a0 mm/page_alloc.c:3477 __alloc_frozen_pages_noprof+0x292/0x710 mm/page_alloc.c:4739 alloc_pages_mpol+0x311/0x660 mm/mempolicy.c:2270 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab+0x8f/0x3a0 mm/slub.c:2587 new_slab mm/slub.c:2640 [inline] ___slab_alloc+0xc27/0x14a0 mm/slub.c:3826 __slab_alloc+0x58/0xa0 mm/slub.c:3916 __slab_alloc_node mm/slub.c:3991 [inline] slab_alloc_node mm/slub.c:4152 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4171 anon_vma_alloc mm/rmap.c:94 [inline] __anon_vma_prepare+0x117/0x4a0 mm/rmap.c:202 __vmf_anon_prepare mm/memory.c:3389 [inline] vmf_anon_prepare mm/internal.h:372 [inline] do_cow_fault mm/memory.c:5412 [inline] do_fault mm/memory.c:5528 [inline] do_pte_missing mm/memory.c:4047 [inline] handle_pte_fault mm/memory.c:5889 [inline] __handle_mm_fault+0x63c7/0x70f0 mm/memory.c:6032 handle_mm_fault+0x2c1/0x7e0 mm/memory.c:6201 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8b0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 page last free pid 5943 tgid 5943 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_frozen_pages+0xe04/0x10e0 mm/page_alloc.c:2660 discard_slab mm/slub.c:2684 [inline] __put_partials+0x160/0x1c0 mm/slub.c:3153 put_cpu_partial+0x17c/0x250 mm/slub.c:3228 __slab_free+0x290/0x380 mm/slub.c:4479 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4115 [inline] slab_alloc_node mm/slub.c:4164 [inline] __kmalloc_cache_noprof+0x1d9/0x390 mm/slub.c:4320 kmalloc_noprof include/linux/slab.h:901 [inline] kzalloc_noprof include/linux/slab.h:1037 [inline] kset_create lib/kobject.c:965 [inline] kset_create_and_add+0x5b/0x170 lib/kobject.c:1008 register_queue_kobjects net/core/net-sysfs.c:1921 [inline] netdev_register_kobject+0x181/0x2e0 net/core/net-sysfs.c:2174 register_netdevice+0x12c3/0x1b10 net/core/dev.c:10861 veth_newlink+0x3fd/0xb00 drivers/net/veth.c:1815 rtnl_newlink_create+0x2ee/0xa40 net/core/rtnetlink.c:3795 __rtnl_newlink net/core/rtnetlink.c:3906 [inline] rtnl_newlink+0x1c7e/0x2210 net/core/rtnetlink.c:4021 rtnetlink_rcv_msg+0x791/0xcf0 net/core/rtnetlink.c:6911 netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2543 Memory state around the buggy address: ffff888077092780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888077092800: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc >ffff888077092880: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888077092900: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc ffff888077092980: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================