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BUG: KASAN: double-free or invalid-free in slab_free mm/slub.c:3212 [inline]
BUG: KASAN: double-free or invalid-free in kfree+0xc3/0x290 mm/slub.c:4200

CPU: 0 PID: 3217 Comm: syz-executor.1 Not tainted 5.10.135-syzkaller-01839-g30abcdabf21e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x81/0x3c0 mm/kasan/report.c:233
 kasan_report_invalid_free+0x58/0x90 mm/kasan/report.c:358
 ____kasan_slab_free+0x139/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:368
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:1604 [inline]
 slab_free_freelist_hook+0xcc/0x1a0 mm/slub.c:1630
 slab_free mm/slub.c:3212 [inline]
 kfree+0xc3/0x290 mm/slub.c:4200
 selinux_tun_dev_free_security+0x15/0x20 security/selinux/hooks.c:5530
 security_tun_dev_free_security+0x4d/0x90 security/security.c:2263
 tun_free_netdev+0xbd/0x1c0 drivers/net/tun.c:2277
 netdev_run_todo+0xbcd/0xe10 net/core/dev.c:10304
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 __tun_chr_ioctl+0x8ca/0x2130 drivers/net/tun.c:3362
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3371
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6
RIP: 0033:0x7f2bf80ba279
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2bf71ac168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2bf81cd2c0 RCX: 00007f2bf80ba279
RDX: 0000000020000040 RSI: 00000000400454ca RDI: 0000000000000003
RBP: 00007f2bf8114189 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd72b003cf R14: 00007f2bf71ac300 R15: 0000000000022000

Allocated by task 3217:
 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:428 [inline]
 ____kasan_kmalloc+0xdc/0x110 mm/kasan/common.c:507
 __kasan_kmalloc+0x9/0x10 mm/kasan/common.c:516
 kasan_kmalloc include/linux/kasan.h:269 [inline]
 kmem_cache_alloc_trace+0x1dd/0x330 mm/slub.c:2983
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 selinux_tun_dev_alloc_security+0x51/0x140 security/selinux/hooks.c:5519
 security_tun_dev_alloc_security+0x50/0xb0 security/security.c:2257
 tun_set_iff+0x944/0x1100 drivers/net/tun.c:2795
 __tun_chr_ioctl+0x8ab/0x2130 drivers/net/tun.c:3095
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3371
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

Freed by task 3217:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:46
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:357
 ____kasan_slab_free+0x121/0x160 mm/kasan/common.c:360
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:368
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:1604 [inline]
 slab_free_freelist_hook+0xcc/0x1a0 mm/slub.c:1630
 slab_free mm/slub.c:3212 [inline]
 kfree+0xc3/0x290 mm/slub.c:4200
 selinux_tun_dev_free_security+0x15/0x20 security/selinux/hooks.c:5530
 security_tun_dev_free_security+0x4d/0x90 security/security.c:2263
 tun_set_iff+0xc98/0x1100 drivers/net/tun.c:2850
 __tun_chr_ioctl+0x8ab/0x2130 drivers/net/tun.c:3095
 tun_chr_ioctl+0x2a/0x40 drivers/net/tun.c:3371
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x34/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xc6

The buggy address belongs to the object at ffff8881339f0c58
 which belongs to the cache kmalloc-8 of size 8
The buggy address is located 0 bytes inside of
 8-byte region [ffff8881339f0c58, ffff8881339f0c60)
The buggy address belongs to the page:
page:ffffea0004ce7c00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1339f0
flags: 0x8000000000000200(slab)
raw: 8000000000000200 ffffea0004d6d340 0000000400000004 ffff888100043c80
raw: 0000000000000000 0000000000660066 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 0x112cc0(GFP_USER|__GFP_NOWARN|__GFP_NORETRY), pid 744, ts 43167582561, free_ts 43167261272
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2385 [inline]
 prep_new_page mm/page_alloc.c:2391 [inline]
 get_page_from_freelist+0x745/0x760 mm/page_alloc.c:4071
 __alloc_pages_nodemask+0x3b6/0x890 mm/page_alloc.c:5121
 alloc_slab_page mm/slub.c:1815 [inline]
 allocate_slab+0x78/0x540 mm/slub.c:1817
 new_slab mm/slub.c:1878 [inline]
 new_slab_objects mm/slub.c:2636 [inline]
 ___slab_alloc+0x131/0x2e0 mm/slub.c:2800
 __slab_alloc+0x63/0xa0 mm/slub.c:2840
 slab_alloc_node mm/slub.c:2922 [inline]
 slab_alloc mm/slub.c:2964 [inline]
 __kmalloc_track_caller+0x23e/0x350 mm/slub.c:4545
 kstrdup mm/util.c:63 [inline]
 kstrdup_const+0x55/0x90 mm/util.c:86
 __kernfs_new_node+0x99/0x6e0 fs/kernfs/dir.c:631
 kernfs_new_node+0x97/0x170 fs/kernfs/dir.c:697
 __kernfs_create_file+0x4a/0x270 fs/kernfs/file.c:985
 cgroup_add_file kernel/cgroup/cgroup.c:3917 [inline]
 cgroup_addrm_files+0xab8/0xfe0 kernel/cgroup/cgroup.c:3979
 css_populate_dir+0x201/0x370 kernel/cgroup/cgroup.c:1703
 cgroup_mkdir+0x12ff/0x15c0 kernel/cgroup/cgroup.c:5477
 kernfs_iop_mkdir+0x1ad/0x2b0 fs/kernfs/dir.c:1134
 vfs_mkdir+0x435/0x610 fs/namei.c:3725
 do_mkdirat+0x1b6/0x2d0 fs/namei.c:3748
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:28 [inline]
 free_pages_prepare mm/page_alloc.c:1331 [inline]
 free_pcp_prepare+0x18c/0x1c0 mm/page_alloc.c:1405
 free_unref_page_prepare mm/page_alloc.c:3291 [inline]
 free_unref_page mm/page_alloc.c:3345 [inline]
 free_the_page mm/page_alloc.c:5180 [inline]
 __free_pages+0x390/0x570 mm/page_alloc.c:5189
 __vunmap+0x846/0x980 mm/vmalloc.c:2275
 __vfree mm/vmalloc.c:2323 [inline]
 vfree+0x5c/0x80 mm/vmalloc.c:2354
 kvfree+0x26/0x40 mm/util.c:645
 pcpu_mem_free mm/percpu.c:502 [inline]
 pcpu_free_chunk mm/percpu.c:1464 [inline]
 pcpu_destroy_chunk+0x116/0x1f0 mm/percpu-vm.c:367
 __pcpu_balance_workfn mm/percpu.c:1981 [inline]
 pcpu_balance_workfn+0xe5d/0x1770 mm/percpu.c:2068
 process_one_work+0x726/0xc10 kernel/workqueue.c:2296
 worker_thread+0xb27/0x1550 kernel/workqueue.c:2442
 kthread+0x349/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:299

Memory state around the buggy address:
 ffff8881339f0b00: fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc
 ffff8881339f0b80: fc fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc
>ffff8881339f0c00: fc fa fc fc fc fc fa fc fc fc fc fa fc fc fc fc
                                                    ^
 ffff8881339f0c80: fa fc fc fc fc fa fc fc fc fc 00 fc fc fc fc fa
 ffff8881339f0d00: fc fc fc fc fa fc fc fc fc fa fc fc fc fc fa fc
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