================================================================== 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 ffff8880285e79b4 by task kworker/3:0H/36 CPU: 3 PID: 36 Comm: kworker/3:0H Not tainted 6.10.0-rc5-syzkaller-00018-g55027e689933 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 Workqueue: xfs-log/loop3 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 10937: 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_noprof+0x121/0x2f0 mm/slub.c:4008 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+0x151/0x4a0 fs/xfs/xfs_dquot.c:901 xfs_qm_scall_setqlim+0x172/0x1980 fs/xfs/xfs_qm_syscalls.c:300 xfs_fs_set_dqblk+0x166/0x1e0 fs/xfs/xfs_quotaops.c:267 quota_setquota+0x4c5/0x5f0 fs/quota/quota.c:310 do_quotactl+0xb00/0x1380 fs/quota/quota.c:802 __do_sys_quotactl fs/quota/quota.c:961 [inline] __se_sys_quotactl fs/quota/quota.c:917 [inline] __ia32_sys_quotactl+0x1bb/0x450 fs/quota/quota.c:917 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 111: 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 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 ffff8880285e7740 which belongs to the cache xfs_dquot of size 704 The buggy address is located 628 bytes inside of freed 704-byte region [ffff8880285e7740, ffff8880285e7a00) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880285e6d80 pfn:0x285e4 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 ffff88801b330280 dead000000000122 0000000000000000 raw: ffff8880285e6d80 000000008013000a 00000001ffffefff 0000000000000000 head: 00fff00000000040 ffff88801b330280 dead000000000122 0000000000000000 head: ffff8880285e6d80 000000008013000a 00000001ffffefff 0000000000000000 head: 00fff00000000002 ffffea0000a17901 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 5337, tgid 5335 (syz-executor.2), ts 60152096132, free_ts 60150156453 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_noprof+0x2ae/0x2f0 mm/slub.c:4008 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+0x559/0xac0 fs/xfs/xfs_qm.c:674 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 34 tgid 34 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 stack_depot_save_flags+0x2da/0x900 lib/stackdepot.c:666 kasan_save_stack+0x42/0x60 mm/kasan/common.c:48 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 bvec_free+0xe0/0x120 block/bio.c:169 bio_free+0xaa/0x130 block/bio.c:236 bio_put_percpu_cache block/bio.c:800 [inline] bio_put+0x355/0x5b0 block/bio.c:819 bio_endio+0x644/0x760 block/bio.c:1636 blk_update_request+0x704/0x1850 block/blk-mq.c:929 blk_mq_end_request+0x5b/0x620 block/blk-mq.c:1057 lo_complete_rq+0x232/0x2f0 drivers/block/loop.c:389 blk_complete_reqs+0xae/0xf0 block/blk-mq.c:1132 Memory state around the buggy address: ffff8880285e7880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8880285e7900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8880285e7980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880285e7a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff8880285e7a80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================