================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline] BUG: KASAN: use-after-free in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:511 [inline] BUG: KASAN: use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] BUG: KASAN: use-after-free in do_raw_spin_lock include/linux/spinlock.h:187 [inline] BUG: KASAN: use-after-free in __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x97/0x1b0 kernel/locking/spinlock.c:178 Write of size 4 at addr ffff888122444308 by task kworker/1:1/39 CPU: 1 PID: 39 Comm: kworker/1:1 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: vsock-loopback vsock_loopback_work Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106 print_address_description+0x87/0x3b0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:427 [inline] kasan_report+0x179/0x1c0 mm/kasan/report.c:444 kasan_check_range+0x293/0x2a0 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:101 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:511 [inline] queued_spin_lock include/asm-generic/qspinlock.h:82 [inline] do_raw_spin_lock include/linux/spinlock.h:187 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline] _raw_spin_lock_bh+0x97/0x1b0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:368 [inline] virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1174 [inline] virtio_transport_recv_pkt+0x6d0/0x4160 net/vmw_vsock/virtio_transport_common.c:1310 vsock_loopback_work+0x37d/0x3f0 net/vmw_vsock/vsock_loopback.c:137 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Allocated by task 18371: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:433 [inline] ____kasan_kmalloc+0xdb/0x110 mm/kasan/common.c:512 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:521 kasan_kmalloc include/linux/kasan.h:227 [inline] kmem_cache_alloc_trace+0x115/0x210 mm/slub.c:3267 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] virtio_transport_do_socket_init+0x56/0x2d0 net/vmw_vsock/virtio_transport_common.c:604 vsock_assign_transport+0x473/0x5b0 net/vmw_vsock/af_vsock.c:496 vsock_connect+0x5cf/0xd30 net/vmw_vsock/af_vsock.c:1340 __sys_connect_file net/socket.c:1918 [inline] __sys_connect+0x38b/0x410 net/socket.c:1935 __do_sys_connect net/socket.c:1945 [inline] __se_sys_connect net/socket.c:1942 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1942 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb Freed by task 18371: kasan_save_stack mm/kasan/common.c:38 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:45 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370 ____kasan_slab_free+0x126/0x160 mm/kasan/common.c:365 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:373 kasan_slab_free include/linux/kasan.h:193 [inline] slab_free_hook mm/slub.c:1723 [inline] slab_free_freelist_hook+0xbd/0x190 mm/slub.c:1749 slab_free mm/slub.c:3519 [inline] kfree+0xc8/0x220 mm/slub.c:4579 virtio_transport_destruct+0x3b/0x40 net/vmw_vsock/virtio_transport_common.c:818 vsock_deassign_transport net/vmw_vsock/af_vsock.c:411 [inline] vsock_assign_transport+0x32b/0x5b0 net/vmw_vsock/af_vsock.c:479 vsock_connect+0x5cf/0xd30 net/vmw_vsock/af_vsock.c:1340 __sys_connect_file net/socket.c:1918 [inline] __sys_connect+0x38b/0x410 net/socket.c:1935 __do_sys_connect net/socket.c:1945 [inline] __se_sys_connect net/socket.c:1942 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:1942 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb The buggy address belongs to the object at ffff888122444300 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 8 bytes inside of 96-byte region [ffff888122444300, ffff888122444360) The buggy address belongs to the page: page:ffffea0004891100 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x122444 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 0000000000000000 0000001f00000001 ffff888100042900 raw: 0000000000000000 0000000000200020 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 290, ts 29441834490, free_ts 29441365925 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1a3/0x1b0 mm/page_alloc.c:2604 prep_new_page+0x1b/0x110 mm/page_alloc.c:2610 get_page_from_freelist+0x3550/0x35d0 mm/page_alloc.c:4484 __alloc_pages+0x27e/0x8f0 mm/page_alloc.c:5776 allocate_slab mm/slub.c:1932 [inline] new_slab+0x9a/0x4e0 mm/slub.c:1995 ___slab_alloc+0x39e/0x830 mm/slub.c:3028 __slab_alloc+0x4a/0x90 mm/slub.c:3115 slab_alloc_node mm/slub.c:3206 [inline] slab_alloc mm/slub.c:3248 [inline] kmem_cache_alloc_trace+0x142/0x210 mm/slub.c:3265 kmalloc include/linux/slab.h:603 [inline] kzalloc include/linux/slab.h:733 [inline] mmu_notifier_subscriptions_init include/linux/mmu_notifier.h:516 [inline] mm_init+0x39a/0x970 kernel/fork.c:1122 dup_mm kernel/fork.c:1518 [inline] copy_mm+0x1e3/0x13e0 kernel/fork.c:1573 copy_process+0x1149/0x3290 kernel/fork.c:2264 kernel_clone+0x21e/0x9e0 kernel/fork.c:2662 __do_sys_clone kernel/fork.c:2788 [inline] __se_sys_clone kernel/fork.c:2772 [inline] __x64_sys_clone+0x23f/0x290 kernel/fork.c:2772 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb page last free stack trace: reset_page_owner include/linux/page_owner.h:26 [inline] free_pages_prepare mm/page_alloc.c:1471 [inline] free_pcp_prepare mm/page_alloc.c:1543 [inline] free_unref_page_prepare+0x7c8/0x7d0 mm/page_alloc.c:3533 free_unref_page+0xe8/0x750 mm/page_alloc.c:3615 free_the_page mm/page_alloc.c:804 [inline] __free_pages+0x61/0xf0 mm/page_alloc.c:5852 __vunmap+0x7bc/0x8f0 mm/vmalloc.c:2652 free_work+0x5b/0x80 mm/vmalloc.c:96 process_one_work+0x6bb/0xc10 kernel/workqueue.c:2325 worker_thread+0xad5/0x12a0 kernel/workqueue.c:2472 kthread+0x421/0x510 kernel/kthread.c:337 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Memory state around the buggy address: ffff888122444200: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888122444280: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888122444300: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888122444380: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888122444400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================