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BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_add_negative include/asm-generic/atomic-instrumented.h:556 [inline]
BUG: KASAN: use-after-free in get_ucounts+0x28/0x160 kernel/ucount.c:152
Write of size 4 at addr ffff8880159da21c by task syz-executor.2/10827

CPU: 0 PID: 10827 Comm: syz-executor.2 Not tainted 5.14.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1ae/0x29f lib/dump_stack.c:105
 print_address_description+0x66/0x3b0 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report+0x163/0x210 mm/kasan/report.c:436
 check_region_inline mm/kasan/generic.c:135 [inline]
 kasan_check_range+0x2b5/0x2f0 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_add_negative include/asm-generic/atomic-instrumented.h:556 [inline]
 get_ucounts+0x28/0x160 kernel/ucount.c:152
 set_cred_ucounts+0x220/0x2d0 kernel/cred.c:684
 __sys_setuid+0x34b/0x490 kernel/sys.c:623
 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+0x44/0xae
RIP: 0033:0x4665d9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2df9cbf188 EFLAGS: 00000246 ORIG_RAX: 0000000000000069
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000000000ff
RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 00007ffddd89fcaf R14: 00007f2df9cbf300 R15: 0000000000022000

Allocated by task 10794:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xc4/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 kmem_cache_alloc_trace+0x96/0x340 mm/slub.c:2983
 kmalloc include/linux/slab.h:591 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 alloc_ucounts+0x176/0x420 kernel/ucount.c:169
 set_cred_ucounts+0x220/0x2d0 kernel/cred.c:684
 __sys_setuid+0x34b/0x490 kernel/sys.c:623
 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+0x44/0xae

Freed by task 10828:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x3d/0x70 mm/kasan/common.c:46
 kasan_set_free_info+0x1f/0x40 mm/kasan/generic.c:360
 ____kasan_slab_free+0x109/0x150 mm/kasan/common.c:366
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:1625 [inline]
 slab_free_freelist_hook+0x1d8/0x290 mm/slub.c:1650
 slab_free mm/slub.c:3210 [inline]
 kfree+0xcf/0x2d0 mm/slub.c:4262
 put_cred_rcu+0x221/0x400 kernel/cred.c:124
 rcu_do_batch kernel/rcu/tree.c:2550 [inline]
 rcu_core+0x906/0x14b0 kernel/rcu/tree.c:2785
 __do_softirq+0x372/0x783 kernel/softirq.c:558

Last potentially related work creation:
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:38
 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:348
 insert_work+0x54/0x400 kernel/workqueue.c:1332
 __queue_work+0x928/0xc60 kernel/workqueue.c:1498
 queue_work_on+0x111/0x200 kernel/workqueue.c:1525
 queue_work include/linux/workqueue.h:507 [inline]
 call_usermodehelper_exec+0x283/0x470 kernel/umh.c:435
 kobject_uevent_env+0x1337/0x1700 lib/kobject_uevent.c:618
 __kobject_del+0x286/0x310 lib/kobject.c:617
 kobject_cleanup+0x174/0x280 lib/kobject.c:696
 netdev_queue_update_kobjects+0x38d/0x400 net/core/net-sysfs.c:1670
 remove_queue_kobjects net/core/net-sysfs.c:1767 [inline]
 netdev_unregister_kobject+0x100/0x1b0 net/core/net-sysfs.c:1917
 unregister_netdevice_many+0x145b/0x1980 net/core/dev.c:11102
 unregister_netdevice_queue+0x2e6/0x350 net/core/dev.c:11009
 unregister_netdevice include/linux/netdevice.h:2969 [inline]
 hsr_dev_finalize+0x5cf/0x760 net/hsr/hsr_device.c:560
 hsr_newlink+0x675/0x730 net/hsr/hsr_netlink.c:102
 __rtnl_newlink net/core/rtnetlink.c:3460 [inline]
 rtnl_newlink+0x13f6/0x1cd0 net/core/rtnetlink.c:3508
 rtnetlink_rcv_msg+0x91c/0xe50 net/core/rtnetlink.c:5574
 netlink_rcv_skb+0x1f0/0x460 net/netlink/af_netlink.c:2504
 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline]
 netlink_unicast+0x7de/0x9b0 net/netlink/af_netlink.c:1340
 netlink_sendmsg+0x9e7/0xe00 net/netlink/af_netlink.c:1929
 sock_sendmsg_nosec net/socket.c:703 [inline]
 sock_sendmsg net/socket.c:723 [inline]
 ____sys_sendmsg+0x5a2/0x900 net/socket.c:2392
 ___sys_sendmsg net/socket.c:2446 [inline]
 __sys_sendmsg+0x319/0x400 net/socket.c:2475
 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+0x44/0xae

Second to last potentially related work creation:
 kasan_save_stack+0x27/0x50 mm/kasan/common.c:38
 kasan_record_aux_stack+0xee/0x120 mm/kasan/generic.c:348
 insert_work+0x54/0x400 kernel/workqueue.c:1332
 __queue_work+0x928/0xc60 kernel/workqueue.c:1498
 queue_work_on+0x111/0x200 kernel/workqueue.c:1525
 queue_work include/linux/workqueue.h:507 [inline]
 call_usermodehelper_exec+0x283/0x470 kernel/umh.c:435
 kobject_uevent_env+0x1337/0x1700 lib/kobject_uevent.c:618
 netdev_queue_add_kobject net/core/net-sysfs.c:1621 [inline]
 netdev_queue_update_kobjects+0x1c6/0x400 net/core/net-sysfs.c:1655
 register_queue_kobjects net/core/net-sysfs.c:1716 [inline]
 netdev_register_kobject+0x263/0x310 net/core/net-sysfs.c:1959
 register_netdevice+0x12a1/0x1c20 net/core/dev.c:10331
 __ip_tunnel_create+0x2a0/0x360 net/ipv4/ip_tunnel.c:267
 ip_tunnel_init_net+0x217/0x6f0 net/ipv4/ip_tunnel.c:1069
 ops_init+0x313/0x430 net/core/net_namespace.c:140
 setup_net+0x35b/0x9d0 net/core/net_namespace.c:333
 copy_net_ns+0x359/0x5c0 net/core/net_namespace.c:474
 create_new_namespaces+0x4ce/0xa00 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x11e/0x180 kernel/nsproxy.c:226
 ksys_unshare+0x57d/0xb50 kernel/fork.c:3002
 __do_sys_unshare kernel/fork.c:3076 [inline]
 __se_sys_unshare kernel/fork.c:3074 [inline]
 __x64_sys_unshare+0x34/0x40 kernel/fork.c:3074
 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+0x44/0xae

The buggy address belongs to the object at ffff8880159da200
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 28 bytes inside of
 192-byte region [ffff8880159da200, ffff8880159da2c0)
The buggy address belongs to the page:
page:ffffea0000567680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159da
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffffea0000a04e00 0000000900000009 ffff888011041a00
raw: 0000000000000000 0000000000100010 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 1, ts 2252157053, free_ts 0
 prep_new_page mm/page_alloc.c:2433 [inline]
 get_page_from_freelist+0x779/0xa30 mm/page_alloc.c:4166
 __alloc_pages+0x26c/0x5f0 mm/page_alloc.c:5388
 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2119
 alloc_slab_page mm/slub.c:1688 [inline]
 allocate_slab+0xf1/0x540 mm/slub.c:1828
 new_slab mm/slub.c:1891 [inline]
 new_slab_objects mm/slub.c:2637 [inline]
 ___slab_alloc+0x1cf/0x350 mm/slub.c:2800
 __slab_alloc mm/slub.c:2840 [inline]
 slab_alloc_node mm/slub.c:2922 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 kmem_cache_alloc_trace+0x29d/0x340 mm/slub.c:2981
 kmalloc include/linux/slab.h:591 [inline]
 kzalloc include/linux/slab.h:721 [inline]
 kset_create lib/kobject.c:969 [inline]
 kset_create_and_add+0x55/0x280 lib/kobject.c:1012
 bus_register+0x329/0x870 drivers/base/bus.c:812
 spi_init+0x5c/0xfa drivers/spi/spi.c:4281
 do_one_initcall+0x197/0x3f0 init/main.c:1282
 do_initcall_level+0x14a/0x1f5 init/main.c:1355
 do_initcalls+0x4b/0x8c init/main.c:1371
 kernel_init_freeable+0x3f1/0x57e init/main.c:1593
 kernel_init+0x19/0x2a0 init/main.c:1485
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8880159da100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880159da180: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8880159da200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff8880159da280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff8880159da300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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