================================================================== BUG: KASAN: slab-use-after-free in debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline] BUG: KASAN: slab-use-after-free in do_raw_spin_lock+0x2bf/0x3a0 kernel/locking/spinlock_debug.c:114 Read of size 4 at addr ffff88807e244504 by task kworker/0:1H/1014 CPU: 0 PID: 1014 Comm: kworker/0:1H Not tainted 6.5.0-syzkaller-12821-g6099776f9f26 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/04/2023 Workqueue: glock_workqueue glock_work_func Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 debug_spin_lock_before kernel/locking/spinlock_debug.c:85 [inline] do_raw_spin_lock+0x2bf/0x3a0 kernel/locking/spinlock_debug.c:114 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline] _raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162 __wake_up_common_lock kernel/sched/wait.c:137 [inline] __wake_up+0x101/0x1d0 kernel/sched/wait.c:160 process_one_work+0x781/0x1130 kernel/workqueue.c:2630 process_scheduled_works kernel/workqueue.c:2703 [inline] worker_thread+0xabf/0x1060 kernel/workqueue.c:2784 kthread+0x2b8/0x350 kernel/kthread.c:388 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 Allocated by task 6064: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kmalloc include/linux/slab.h:599 [inline] kzalloc include/linux/slab.h:720 [inline] init_sbd fs/gfs2/ops_fstype.c:77 [inline] gfs2_fill_super+0x136/0x26c0 fs/gfs2/ops_fstype.c:1164 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 gfs2_get_tree+0x54/0x210 fs/gfs2/ops_fstype.c:1348 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 6064: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x28/0x40 mm/kasan/generic.c:522 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:164 [inline] slab_free_hook mm/slub.c:1800 [inline] slab_free_freelist_hook mm/slub.c:1826 [inline] slab_free mm/slub.c:3809 [inline] __kmem_cache_free+0x25f/0x3b0 mm/slub.c:3822 free_sbd fs/gfs2/ops_fstype.c:69 [inline] gfs2_fill_super+0x12e2/0x26c0 fs/gfs2/ops_fstype.c:1331 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 gfs2_get_tree+0x54/0x210 fs/gfs2/ops_fstype.c:1348 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88807e244000 which belongs to the cache kmalloc-8k of size 8192 The buggy address is located 1284 bytes inside of freed 8192-byte region [ffff88807e244000, ffff88807e246000) The buggy address belongs to the physical page: page:ffffea0001f89000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7e240 head:ffffea0001f89000 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 anon flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012842280 0000000000000000 dead000000000001 raw: 0000000000000000 0000000000020002 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5865, tgid 5862 (syz-executor.2), ts 216235312388, free_ts 216224917025 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1536 prep_new_page mm/page_alloc.c:1543 [inline] get_page_from_freelist+0x31db/0x3360 mm/page_alloc.c:3170 __alloc_pages+0x255/0x670 mm/page_alloc.c:4426 alloc_slab_page+0x6a/0x160 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xade/0x1100 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x1af/0x270 mm/slub.c:3517 __do_kmalloc_node mm/slab_common.c:1022 [inline] __kmalloc+0xa8/0x230 mm/slab_common.c:1036 kmalloc_array include/linux/slab.h:636 [inline] mb_cache_create+0x156/0x560 fs/mbcache.c:370 __ext4_fill_super fs/ext4/super.c:5416 [inline] ext4_fill_super+0x4f81/0x6d10 fs/ext4/super.c:5703 get_tree_bdev+0x416/0x5b0 fs/super.c:1577 vfs_get_tree+0x8c/0x280 fs/super.c:1750 do_new_mount+0x28f/0xae0 fs/namespace.c:3335 do_mount fs/namespace.c:3675 [inline] __do_sys_mount fs/namespace.c:3884 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3861 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1136 [inline] free_unref_page_prepare+0x8c3/0x9f0 mm/page_alloc.c:2312 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2405 napi_frag_unref include/linux/skbuff.h:3450 [inline] skb_release_data+0x446/0x850 net/core/skbuff.c:981 skb_release_all net/core/skbuff.c:1053 [inline] __kfree_skb net/core/skbuff.c:1067 [inline] napi_consume_skb+0x123/0x200 net/core/skbuff.c:1357 free_old_xmit_skbs+0x12a/0x440 drivers/net/virtio_net.c:761 virtnet_poll_tx+0x214/0x550 drivers/net/virtio_net.c:2249 __napi_poll+0xc7/0x470 net/core/dev.c:6527 napi_poll net/core/dev.c:6594 [inline] net_rx_action+0x78b/0x1010 net/core/dev.c:6727 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 Memory state around the buggy address: ffff88807e244400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e244480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807e244500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807e244580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807e244600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================