================================================================== 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 ffff888114c55b08 by task kworker/1:3/386 CPU: 1 PID: 386 Comm: kworker/1:3 Not tainted 6.1.75-syzkaller #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 mm/kasan/report.c:284 [inline] print_report+0x158/0x4e0 mm/kasan/report.c:395 kasan_report+0x13c/0x170 mm/kasan/report.c:495 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:1193 [inline] virtio_transport_recv_pkt+0xe7e/0x2980 net/vmw_vsock/virtio_transport_common.c:1336 vsock_loopback_work+0x39a/0x4b0 net/vmw_vsock/vsock_loopback.c:119 process_one_work+0x73d/0xcb0 kernel/workqueue.c:2292 worker_thread+0xa5d/0x1260 kernel/workqueue.c:2439 kthread+0x26d/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 607: 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:374 [inline] __kasan_kmalloc+0x9c/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] kmalloc_trace+0x44/0xa0 mm/slab_common.c:1050 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] virtio_transport_do_socket_init+0x56/0x340 net/vmw_vsock/virtio_transport_common.c:618 vsock_assign_transport+0x473/0x5b0 net/vmw_vsock/af_vsock.c:504 vsock_connect+0x5cf/0xd30 net/vmw_vsock/af_vsock.c:1359 __sys_connect_file net/socket.c:2006 [inline] __sys_connect+0x2c9/0x300 net/socket.c:2023 __do_sys_connect net/socket.c:2033 [inline] __se_sys_connect net/socket.c:2030 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2030 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 607: 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:236 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:244 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1724 [inline] slab_free_freelist_hook mm/slub.c:1750 [inline] slab_free mm/slub.c:3661 [inline] __kmem_cache_free+0x218/0x3b0 mm/slub.c:3674 kfree+0x7a/0xf0 mm/slab_common.c:1007 virtio_transport_destruct+0x3b/0x40 net/vmw_vsock/virtio_transport_common.c:829 vsock_deassign_transport net/vmw_vsock/af_vsock.c:419 [inline] vsock_assign_transport+0x32b/0x5b0 net/vmw_vsock/af_vsock.c:487 vsock_connect+0x5cf/0xd30 net/vmw_vsock/af_vsock.c:1359 __sys_connect_file net/socket.c:2006 [inline] __sys_connect+0x2c9/0x300 net/socket.c:2023 __do_sys_connect net/socket.c:2033 [inline] __se_sys_connect net/socket.c:2030 [inline] __x64_sys_connect+0x7a/0x90 net/socket.c:2030 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:3368 kernfs_unlink_open_file+0x34f/0x400 fs/kernfs/file.c:629 kernfs_fop_release+0x230/0x2f0 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 ffff888114c55b00 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 8 bytes inside of 96-byte region [ffff888114c55b00, ffff888114c55b60) The buggy address belongs to the physical page: page:ffffea0004531540 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x114c55 flags: 0x4000000000000200(slab|zone=1) raw: 4000000000000200 ffffea000453fcc0 dead000000000003 ffff888100041780 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 190, tgid 190 (udevd), ts 5510120750, free_ts 0 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e2/0x1f0 mm/page_alloc.c:2513 prep_new_page mm/page_alloc.c:2520 [inline] get_page_from_freelist+0x2df3/0x2ed0 mm/page_alloc.c:4279 __alloc_pages+0x3c2/0x7d0 mm/page_alloc.c:5545 allocate_slab mm/slub.c:1939 [inline] new_slab+0xce/0x4c0 mm/slub.c:1992 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3180 __slab_alloc+0x5d/0xa0 mm/slub.c:3279 slab_alloc_node mm/slub.c:3364 [inline] __kmem_cache_alloc_node+0x1af/0x250 mm/slub.c:3437 kmalloc_trace+0x2a/0xa0 mm/slab_common.c:1045 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+0x70b/0xb00 fs/kernfs/file.c:736 do_dentry_open+0x88d/0x1150 fs/open.c:882 vfs_open+0x73/0x80 fs/open.c:1013 do_open fs/namei.c:3634 [inline] path_openat+0x2532/0x2d60 fs/namei.c:3791 do_filp_open+0x230/0x480 fs/namei.c:3818 do_sys_openat2+0x13b/0x500 fs/open.c:1318 do_sys_open fs/open.c:1334 [inline] __do_sys_openat fs/open.c:1350 [inline] __se_sys_openat fs/open.c:1345 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1345 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81 page_owner free stack trace missing Memory state around the buggy address: ffff888114c55a00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888114c55a80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff888114c55b00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ^ ffff888114c55b80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff888114c55c00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ==================================================================