================================================================== BUG: KASAN: slab-out-of-bounds in __list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62 Read of size 8 at addr ffff88801da7a5d0 by task kworker/u4:16/12134 CPU: 0 PID: 12134 Comm: kworker/u4:16 Not tainted 6.0.0-syzkaller-09589-g55be6084c8e0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 print_address_description+0x65/0x4b0 mm/kasan/report.c:317 print_report+0x108/0x220 mm/kasan/report.c:433 kasan_report+0xfb/0x130 mm/kasan/report.c:495 __list_del_entry_valid+0xa6/0x130 lib/list_debug.c:62 __list_del_entry include/linux/list.h:134 [inline] list_del include/linux/list.h:148 [inline] unregister_shrinker+0x6a/0x320 mm/vmscan.c:736 nfsd_reply_cache_shutdown+0x2d/0x290 fs/nfsd/nfscache.c:210 nfsd_exit_net+0x24/0x60 fs/nfsd/nfsctl.c:1479 ops_exit_list net/core/net_namespace.c:162 [inline] cleanup_net+0x758/0xc50 net/core/net_namespace.c:594 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Allocated by task 18888: 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:437 [inline] ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:516 kasan_kmalloc include/linux/kasan.h:234 [inline] __kmalloc+0x226/0x370 mm/slub.c:4429 kmalloc include/linux/slab.h:605 [inline] kzalloc include/linux/slab.h:733 [inline] ops_init+0x85/0x430 net/core/net_namespace.c:124 setup_net+0x4bb/0xc10 net/core/net_namespace.c:325 copy_net_ns+0x359/0x5b0 net/core/net_namespace.c:471 create_new_namespaces+0x4db/0x8e0 kernel/nsproxy.c:110 copy_namespaces+0x333/0x390 kernel/nsproxy.c:178 copy_process+0x1a55/0x3fc0 kernel/fork.c:2257 kernel_clone+0x227/0x640 kernel/fork.c:2672 __do_sys_clone3 kernel/fork.c:2964 [inline] __se_sys_clone3+0x372/0x410 kernel/fork.c:2948 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2796 netlink_release+0x12fc/0x1720 net/netlink/af_netlink.c:815 __sock_release net/socket.c:650 [inline] sock_release+0x7a/0x140 net/socket.c:678 nfnetlink_net_exit_batch+0x6a/0xb0 net/netfilter/nfnetlink.c:781 ops_exit_list net/core/net_namespace.c:167 [inline] cleanup_net+0x80c/0xc50 net/core/net_namespace.c:594 process_one_work+0x81c/0xd10 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 Second to last potentially related work creation: kasan_save_stack+0x3b/0x60 mm/kasan/common.c:38 __kasan_record_aux_stack+0xaf/0xc0 mm/kasan/generic.c:348 call_rcu+0x163/0x9c0 kernel/rcu/tree.c:2796 netlink_release+0x12fc/0x1720 net/netlink/af_netlink.c:815 __sock_release net/socket.c:650 [inline] sock_close+0xd7/0x260 net/socket.c:1365 __fput+0x3ba/0x880 fs/file_table.c:320 task_work_run+0x146/0x1c0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop+0x134/0x160 kernel/entry/common.c:169 exit_to_user_mode_prepare+0xad/0x110 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x2e/0x60 kernel/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff88801da7a000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 1488 bytes inside of 2048-byte region [ffff88801da7a000, ffff88801da7a800) The buggy address belongs to the physical page: page:ffffea0000769e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1da78 head:ffffea0000769e00 order:3 compound_mapcount:0 compound_pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000010200 0000000000000000 dead000000000001 ffff888012042000 raw: 0000000000000000 0000000000080008 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 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 3621, tgid 3621 (syz-executor.0), ts 77987151882, free_ts 77983394818 prep_new_page mm/page_alloc.c:2532 [inline] get_page_from_freelist+0x72b/0x7a0 mm/page_alloc.c:4283 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549 alloc_slab_page+0x70/0xf0 mm/slub.c:1829 allocate_slab+0x5e/0x520 mm/slub.c:1974 new_slab mm/slub.c:2034 [inline] ___slab_alloc+0x42e/0xce0 mm/slub.c:3036 __slab_alloc mm/slub.c:3123 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3256 [inline] kmem_cache_alloc_trace+0x25f/0x310 mm/slub.c:3287 kmalloc include/linux/slab.h:600 [inline] kzalloc include/linux/slab.h:733 [inline] nsim_fib_create+0xa4/0xc20 drivers/net/netdevsim/fib.c:1558 nsim_drv_probe+0x71f/0xc10 drivers/net/netdevsim/dev.c:1577 call_driver_probe+0x96/0x250 really_probe+0x24c/0x9f0 drivers/base/dd.c:639 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:778 driver_probe_device+0x50/0x240 drivers/base/dd.c:808 __device_attach_driver+0x272/0x3c0 drivers/base/dd.c:936 bus_for_each_drv+0x18a/0x210 drivers/base/bus.c:427 __device_attach+0x372/0x5a0 drivers/base/dd.c:1008 bus_probe_device+0xb8/0x1f0 drivers/base/bus.c:487 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1449 [inline] free_pcp_prepare+0x812/0x900 mm/page_alloc.c:1499 free_unref_page_prepare mm/page_alloc.c:3380 [inline] free_unref_page+0x7d/0x630 mm/page_alloc.c:3476 free_slab mm/slub.c:2073 [inline] discard_slab mm/slub.c:2079 [inline] __unfreeze_partials+0x1ab/0x200 mm/slub.c:2553 put_cpu_partial+0x116/0x180 mm/slub.c:2629 qlist_free_all+0x2b/0x70 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x169/0x180 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x2f/0xe0 mm/kasan/common.c:447 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:727 [inline] slab_alloc_node mm/slub.c:3248 [inline] kmem_cache_alloc_node+0x1cc/0x350 mm/slub.c:3298 __alloc_skb+0xd5/0x620 net/core/skbuff.c:497 alloc_skb include/linux/skbuff.h:1265 [inline] nlmsg_new include/net/netlink.h:964 [inline] devlink_trap_notify+0x62/0x1b0 net/core/devlink.c:11796 devlink_notify_register net/core/devlink.c:9707 [inline] devlink_register+0x276/0x590 net/core/devlink.c:9767 nsim_drv_probe+0xa24/0xc10 drivers/net/netdevsim/dev.c:1606 call_driver_probe+0x96/0x250 really_probe+0x24c/0x9f0 drivers/base/dd.c:639 __driver_probe_device+0x1f4/0x3f0 drivers/base/dd.c:778 driver_probe_device+0x50/0x240 drivers/base/dd.c:808 Memory state around the buggy address: ffff88801da7a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801da7a500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff88801da7a580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff88801da7a600: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88801da7a680: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================