================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_unevictable include/linux/pagemap.h:259 [inline] BUG: KASAN: slab-use-after-free in folio_evictable mm/internal.h:353 [inline] BUG: KASAN: slab-use-after-free in lru_add_fn+0x192/0xd70 mm/swap.c:184 Read of size 8 at addr ffff88802ffe04a8 by task syz-executor.1/5908 CPU: 1 PID: 5908 Comm: syz-executor.1 Not tainted 6.10.0-rc3-syzkaller #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unevictable include/linux/pagemap.h:259 [inline] folio_evictable mm/internal.h:353 [inline] lru_add_fn+0x192/0xd70 mm/swap.c:184 folio_batch_move_lru+0x243/0x400 mm/swap.c:220 lru_add_drain_cpu+0x534/0x860 mm/swap.c:657 lru_add_drain+0x109/0x440 mm/swap.c:757 unmap_region+0xc0/0x420 mm/mmap.c:2362 do_vmi_align_munmap+0x1107/0x19c0 mm/mmap.c:2683 do_vmi_munmap+0x231/0x410 mm/mmap.c:2759 mmap_region+0x17f/0x2760 mm/mmap.c:2810 do_mmap+0xbc7/0xf60 mm/mmap.c:1397 vm_mmap_pgoff+0x1ba/0x360 mm/util.c:573 ksys_mmap_pgoff+0x7d/0x5d0 mm/mmap.c:1443 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:86 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:79 [inline] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:79 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f75da27cee9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f75d9dff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f75da3abf80 RCX: 00007f75da27cee9 RDX: b635773f06ebbeee RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 00007f75da2c949e R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f75da3abf80 R15: 00007ffd1795e588 Allocated by task 5900: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmem_cache_alloc_lru_noprof+0x121/0x2f0 mm/slub.c:4020 nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:154 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_locked+0xa1/0xe0 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x2f/0x1e0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0x12d/0x1d0 fs/nilfs2/super.c:557 nilfs_fill_super fs/nilfs2/super.c:1067 [inline] nilfs_get_tree+0x951/0x1000 fs/nilfs2/super.c:1211 vfs_get_tree+0x8f/0x380 fs/super.c:1780 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5863: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object+0xf7/0x160 mm/kasan/common.c:240 __kasan_slab_free+0x32/0x50 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2196 [inline] slab_free mm/slub.c:4437 [inline] kmem_cache_free+0x12f/0x3a0 mm/slub.c:4512 i_callback+0x43/0x70 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2535 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2809 handle_softirqs+0x216/0x8f0 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu kernel/softirq.c:637 [inline] irq_exit_rcu+0xbb/0x120 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:3072 destroy_inode+0x12c/0x1b0 fs/inode.c:316 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 nilfs_put_root+0xae/0xe0 fs/nilfs2/the_nilfs.c:925 nilfs_segctor_destroy fs/nilfs2/segment.c:2788 [inline] nilfs_detach_log_writer+0x5ef/0xaa0 fs/nilfs2/segment.c:2850 nilfs_put_super+0x43/0x1b0 fs/nilfs2/super.c:498 generic_shutdown_super+0x159/0x3d0 fs/super.c:642 kill_block_super+0x3b/0x90 fs/super.c:1676 deactivate_locked_super+0xbe/0x1a0 fs/super.c:473 deactivate_super+0xde/0x100 fs/super.c:506 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88802ffe0000 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff88802ffe0000, ffff88802ffe05e8) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2ffe0 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888015f75101 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801a9c17c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffefff ffff888015f75101 head: 00fff00000000040 ffff88801a9c17c0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080130013 00000001ffffefff ffff888015f75101 head: 00fff00000000003 ffffea0000bff801 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 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 5900, tgid 5899 (syz-executor.1), ts 84540729685, free_ts 74434515092 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x136a/0x2e50 mm/page_alloc.c:3420 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4678 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] alloc_slab_page+0x56/0x110 mm/slub.c:2265 allocate_slab mm/slub.c:2428 [inline] new_slab+0x84/0x260 mm/slub.c:2481 ___slab_alloc+0xdac/0x1870 mm/slub.c:3667 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3757 __slab_alloc_node mm/slub.c:3810 [inline] slab_alloc_node mm/slub.c:3989 [inline] kmem_cache_alloc_lru_noprof+0x2a0/0x2f0 mm/slub.c:4020 nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:154 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_locked+0xa1/0xe0 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x2f/0x1e0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0x12d/0x1d0 fs/nilfs2/super.c:557 nilfs_fill_super fs/nilfs2/super.c:1067 [inline] nilfs_get_tree+0x951/0x1000 fs/nilfs2/super.c:1211 vfs_get_tree+0x8f/0x380 fs/super.c:1780 page last free pid 5663 tgid 5663 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0x64a/0xe40 mm/page_alloc.c:2583 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3941 [inline] slab_alloc_node mm/slub.c:4001 [inline] kmalloc_trace_noprof+0x11e/0x300 mm/slub.c:4148 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] dropmon_net_event+0x15d/0x360 net/core/drop_monitor.c:1583 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1992 call_netdevice_notifiers_extack net/core/dev.c:2030 [inline] call_netdevice_notifiers net/core/dev.c:2044 [inline] register_netdevice+0x15fb/0x1cb0 net/core/dev.c:10408 veth_newlink+0x4f6/0xa10 drivers/net/veth.c:1860 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink+0x1197/0x1960 net/core/rtnetlink.c:3730 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6635 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2564 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x542/0x820 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1905 Memory state around the buggy address: ffff88802ffe0380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802ffe0400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88802ffe0480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88802ffe0500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88802ffe0580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ==================================================================