================================================================== BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline] BUG: KASAN: use-after-free in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:541 [inline] BUG: KASAN: use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:111 [inline] BUG: KASAN: use-after-free in do_raw_spin_lock include/linux/spinlock.h:186 [inline] BUG: KASAN: use-after-free in __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x97/0x1b0 kernel/locking/spinlock.c:178 Write of size 4 at addr ffff888114764088 by task kworker/0:4/343 CPU: 0 PID: 343 Comm: kworker/0:4 Not tainted 6.1.78-syzkaller-00133-g74c507aab139 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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 mm/kasan/report.c:316 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:427 kasan_report+0x13c/0x170 mm/kasan/report.c:531 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37 instrument_atomic_read_write include/linux/instrumented.h:102 [inline] atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:541 [inline] queued_spin_lock include/asm-generic/qspinlock.h:111 [inline] do_raw_spin_lock include/linux/spinlock.h:186 [inline] __raw_spin_lock_bh include/linux/spinlock_api_smp.h:127 [inline] _raw_spin_lock_bh+0x97/0x1b0 kernel/locking/spinlock.c:178 spin_lock_bh include/linux/spinlock.h:355 [inline] virtio_transport_space_update net/vmw_vsock/virtio_transport_common.c:1171 [inline] virtio_transport_recv_pkt+0x6d3/0x4130 net/vmw_vsock/virtio_transport_common.c:1307 vsock_loopback_work+0x37d/0x3f0 net/vmw_vsock/vsock_loopback.c:137 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2299 worker_thread+0xa60/0x1260 kernel/workqueue.c:2446 kthread+0x26d/0x300 kernel/kthread.c:386 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 2153: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:379 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:388 kasan_kmalloc include/linux/kasan.h:212 [inline] kmalloc_trace+0x44/0xa0 mm/slab_common.c:1052 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [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:506 vsock_connect+0x5cf/0xd30 net/vmw_vsock/af_vsock.c:1361 __sys_connect_file net/socket.c:1996 [inline] __sys_connect+0x2c9/0x300 net/socket.c:2013 __do_sys_connect net/socket.c:2023 [inline] __se_sys_connect net/socket.c:2020 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2020 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 2153: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4b/0x70 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249 kasan_slab_free include/linux/kasan.h:178 [inline] slab_free_hook mm/slub.c:1745 [inline] slab_free_freelist_hook mm/slub.c:1771 [inline] slab_free mm/slub.c:3684 [inline] __kmem_cache_free+0x218/0x3b0 mm/slub.c:3697 kfree+0x7a/0xf0 mm/slab_common.c:1009 virtio_transport_destruct+0x3b/0x40 net/vmw_vsock/virtio_transport_common.c:815 vsock_deassign_transport net/vmw_vsock/af_vsock.c:421 [inline] vsock_assign_transport+0x32b/0x5b0 net/vmw_vsock/af_vsock.c:489 vsock_connect+0x5cf/0xd30 net/vmw_vsock/af_vsock.c:1361 __sys_connect_file net/socket.c:1996 [inline] __sys_connect+0x2c9/0x300 net/socket.c:2013 __do_sys_connect net/socket.c:2023 [inline] __se_sys_connect net/socket.c:2020 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2020 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496 kvfree_call_rcu+0x9f/0x800 kernel/rcu/tree.c:3444 kernfs_unlink_open_file+0x327/0x3d0 fs/kernfs/file.c:629 kernfs_fop_release+0x253/0x310 fs/kernfs/file.c:801 __fput+0x3ab/0x870 fs/file_table.c:320 ____fput+0x15/0x20 fs/file_table.c:348 task_work_run+0x24d/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:171 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline] syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888114764080 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 8 bytes inside of 96-byte region [ffff888114764080, ffff8881147640e0) The buggy address belongs to the physical page: page:ffffea000451d900 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888114764400 pfn:0x114764 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea0004238540 dead000000000004 ffff888100042900 raw: ffff888114764400 0000000080200018 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 102, tgid 102 (udevd), ts 3881985527, free_ts 0 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x213/0x220 mm/page_alloc.c:2590 prep_new_page+0x1b/0x110 mm/page_alloc.c:2597 get_page_from_freelist+0x27ea/0x2870 mm/page_alloc.c:4425 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5712 alloc_slab_page+0x6c/0xf0 allocate_slab mm/slub.c:1962 [inline] new_slab+0x90/0x3e0 mm/slub.c:2015 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3203 __slab_alloc+0x5d/0xa0 mm/slub.c:3302 slab_alloc_node mm/slub.c:3387 [inline] __kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3460 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1047 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] kernfs_get_open_node fs/kernfs/file.c:568 [inline] kernfs_fop_open+0x70e/0xb10 fs/kernfs/file.c:736 do_dentry_open+0x891/0x1250 fs/open.c:884 vfs_open+0x73/0x80 fs/open.c:1015 do_open fs/namei.c:3627 [inline] path_openat+0x2532/0x2d60 fs/namei.c:3784 do_filp_open+0x230/0x480 fs/namei.c:3811 do_sys_openat2+0x13f/0x850 fs/open.c:1341 page_owner free stack trace missing Memory state around the buggy address: ffff888114763f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888114764000: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888114764080: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888114764100: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ffff888114764180: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc ==================================================================