================================================================== BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115 Read of size 4 at addr ffff88801194dfb4 by task kworker/2:1H/1112 CPU: 2 PID: 1112 Comm: kworker/2:1H Not tainted 6.10.0-rc1-syzkaller-00013-g2bfcfd584ff5 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: xfs-log/loop0 xlog_ioend_work 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 debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline] do_raw_spin_lock+0x271/0x2c0 kernel/locking/spinlock_debug.c:115 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0x42/0x60 kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:105 [inline] __wake_up+0x1c/0x60 kernel/sched/wait.c:127 xfs_qm_dquot_logitem_unpin+0x81/0x90 fs/xfs/xfs_dquot_item.c:96 xfs_log_item_batch_insert fs/xfs/xfs_trans.c:746 [inline] xfs_trans_committed_bulk+0x744/0x890 fs/xfs/xfs_trans.c:850 xlog_cil_committed+0x161/0x840 fs/xfs/xfs_log_cil.c:736 xlog_cil_process_committed+0x123/0x1f0 fs/xfs/xfs_log_cil.c:768 xlog_state_do_iclog_callbacks fs/xfs/xfs_log.c:2791 [inline] xlog_state_do_callback+0x562/0xd90 fs/xfs/xfs_log.c:2816 xlog_ioend_work+0x92/0x110 fs/xfs/xfs_log.c:1398 process_one_work+0x958/0x1ad0 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x6c8/0xf70 kernel/workqueue.c:3393 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 7507: 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:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_noprof+0x121/0x2f0 mm/slub.c:4007 xfs_dquot_alloc+0x2a/0x670 fs/xfs/xfs_dquot.c:497 xfs_qm_dqread+0x8e/0x5f0 fs/xfs/xfs_dquot.c:683 xfs_qm_dqget_inode+0x224/0x6d0 fs/xfs/xfs_dquot.c:1004 xfs_qm_dqattach_one+0x26f/0x590 fs/xfs/xfs_qm.c:278 xfs_qm_dqattach_locked+0x1c6/0x2d0 fs/xfs/xfs_qm.c:337 xfs_qm_dqattach fs/xfs/xfs_qm.c:371 [inline] xfs_qm_dqattach+0x47/0x70 fs/xfs/xfs_qm.c:362 xfs_remove+0x282/0xc60 fs/xfs/xfs_inode.c:2743 xfs_vn_unlink+0xfd/0x230 fs/xfs/xfs_iops.c:403 vfs_unlink+0x2fb/0x9b0 fs/namei.c:4343 do_unlinkat+0x5c0/0x750 fs/namei.c:4407 __do_sys_unlink fs/namei.c:4455 [inline] __se_sys_unlink fs/namei.c:4453 [inline] __ia32_sys_unlink+0xc6/0x110 fs/namei.c:4453 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Freed by task 112: 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:2195 [inline] slab_free mm/slub.c:4436 [inline] kmem_cache_free+0x12f/0x3a0 mm/slub.c:4511 xfs_qm_shrink_scan+0x25c/0x3f0 fs/xfs/xfs_qm.c:531 do_shrink_slab+0x44f/0x11c0 mm/shrinker.c:435 shrink_slab+0x18a/0x1310 mm/shrinker.c:662 shrink_one+0x493/0x7c0 mm/vmscan.c:4790 shrink_many mm/vmscan.c:4851 [inline] lru_gen_shrink_node+0x89f/0x1750 mm/vmscan.c:4951 shrink_node mm/vmscan.c:5910 [inline] kswapd_shrink_node mm/vmscan.c:6720 [inline] balance_pgdat+0x1105/0x1970 mm/vmscan.c:6911 kswapd+0x5ea/0xbf0 mm/vmscan.c:7180 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the object at ffff88801194dd40 which belongs to the cache xfs_dquot of size 704 The buggy address is located 628 bytes inside of freed 704-byte region [ffff88801194dd40, ffff88801194e000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88801194d6c0 pfn:0x1194c head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff888019d60c80 dead000000000122 0000000000000000 raw: ffff88801194d6c0 000000008013000d 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff888019d60c80 dead000000000122 0000000000000000 head: ffff88801194d6c0 000000008013000d 00000001ffffefff 0000000000000000 head: 00fff00000000002 ffffea0000465301 ffffffffffffffff 0000000000000000 head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 2, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 7643, tgid 7642 (syz-executor.3), ts 168461537699, free_ts 167856682291 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/0x2df0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x22b/0x2460 mm/page_alloc.c:4660 __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:2264 allocate_slab mm/slub.c:2427 [inline] new_slab+0x84/0x260 mm/slub.c:2480 ___slab_alloc+0xdac/0x1870 mm/slub.c:3666 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_noprof+0x2ae/0x2f0 mm/slub.c:4007 xfs_dquot_alloc+0x2a/0x670 fs/xfs/xfs_dquot.c:497 xfs_qm_dqread+0x8e/0x5f0 fs/xfs/xfs_dquot.c:683 xfs_qm_dqget_uncached+0xbc/0x160 fs/xfs/xfs_dquot.c:940 xfs_qm_init_timelimits+0x153/0x390 fs/xfs/xfs_qm.c:600 xfs_qm_init_quotainfo+0x54c/0xac0 fs/xfs/xfs_qm.c:673 xfs_qm_mount_quotas+0x59/0x650 fs/xfs/xfs_qm.c:1477 xfs_mountfs+0x1b72/0x1e80 fs/xfs/xfs_mount.c:980 xfs_fs_fill_super+0x1434/0x1df0 fs/xfs/xfs_super.c:1753 page last free pid 7507 tgid 7507 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:2565 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:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmalloc_trace_noprof+0x11e/0x310 mm/slub.c:4147 kmalloc_noprof include/linux/slab.h:660 [inline] kzalloc_noprof include/linux/slab.h:778 [inline] ref_tracker_alloc+0x17c/0x5b0 lib/ref_tracker.c:203 __netdev_tracker_alloc include/linux/netdevice.h:4038 [inline] netdev_hold include/linux/netdevice.h:4067 [inline] netdev_hold include/linux/netdevice.h:4062 [inline] netdev_queue_add_kobject net/core/net-sysfs.c:1783 [inline] netdev_queue_update_kobjects+0x281/0x640 net/core/net-sysfs.c:1838 register_queue_kobjects net/core/net-sysfs.c:1900 [inline] netdev_register_kobject+0x290/0x3f0 net/core/net-sysfs.c:2140 register_netdevice+0x12ce/0x1c40 net/core/dev.c:10374 veth_newlink+0x363/0xa10 drivers/net/veth.c:1829 rtnl_newlink_create net/core/rtnetlink.c:3510 [inline] __rtnl_newlink+0x119c/0x1960 net/core/rtnetlink.c:3730 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3743 rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595 netlink_rcv_skb+0x165/0x410 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: ffff88801194de80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88801194df00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88801194df80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801194e000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801194e080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================