[ 17.459902][ T231] ==================================================================
[ 17.460205][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.460452][ T231] Read of size 1 at addr ffff88800c5e068c by task packetdrill/231
[ 17.460701][ T231]
[ 17.460785][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.460792][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.460794][ T231] Call Trace:
[ 17.460797][ T231]
[ 17.460799][ T231] dump_stack_lvl+0x82/0xc0
[ 17.460805][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 17.460813][ T231] ? kobject_put+0xbb/0xd0
[ 17.460817][ T231] print_report+0xb4/0x270
[ 17.460821][ T231] ? kobject_put+0xbb/0xd0
[ 17.460824][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 17.460828][ T231] ? kobject_put+0xbb/0xd0
[ 17.460831][ T231] kasan_report+0xca/0x100
[ 17.460835][ T231] ? kobject_put+0xbb/0xd0
[ 17.460840][ T231] kobject_put+0xbb/0xd0
[ 17.460844][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.460849][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.460853][ T231] ? netif_state_change+0x228/0x2c0
[ 17.460857][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.460859][ T231] ? generic_xdp_install+0x410/0x410
[ 17.460863][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.460872][ T231] tun_chr_close+0xc0/0x1c0
[ 17.460879][ T231] __fput+0x35c/0xa70
[ 17.460888][ T231] fput_close_sync+0xdd/0x1b0
[ 17.460891][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.460896][ T231] __x64_sys_close+0x7d/0xd0
[ 17.460899][ T231] do_syscall_64+0xc1/0xfd0
[ 17.460906][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.460910][ T231] RIP: 0033:0x4901eb
[ 17.460915][ T231] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 78 04 00 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 79 04 00 8b 44
[ 17.460918][ T231] RSP: 002b:00007ffc21773b40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.460923][ T231] RAX: ffffffffffffffda RBX: 00007ffc217740a0 RCX: 00000000004901eb
[ 17.460925][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.460927][ T231] RBP: 00007ffc21773b80 R08: 0000000000000000 R09: 0000000000000000
[ 17.460929][ T231] R10: 000000001044dd80 R11: 0000000000000293 R12: 00007ffc21774018
[ 17.460931][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.460937][ T231]
[ 17.460938][ T231]
[ 17.467433][ T231] The buggy address belongs to the physical page:
[ 17.467633][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c5e7000 pfn:0xc5e0
[ 17.467954][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 17.468122][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 17.468412][ T231] raw: ffff88800c5e7000 0000000000000000 00000001ffffffff 0000000000000000
[ 17.468690][ T231] page dumped because: kasan: bad access detected
[ 17.468886][ T231]
[ 17.468965][ T231] Memory state around the buggy address:
[ 17.469134][ T231] ffff88800c5e0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.469379][ T231] ffff88800c5e0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.469602][ T231] >ffff88800c5e0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.469831][ T231] ^
[ 17.469946][ T231] ffff88800c5e0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.470174][ T231] ffff88800c5e0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.470405][ T231] ==================================================================
[ 17.470713][ T231] Disabling lock debugging due to kernel taint
[ 17.470949][ T231] ------------[ cut here ]------------
[ 17.471119][ T231] refcount_t: underflow; use-after-free.
[ 17.471331][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.471631][ T231] Modules linked in:
[ 17.471780][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.472160][ T231] Tainted: [B]=BAD_PAGE
[ 17.472306][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.472528][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.472750][ T231] Code: 3f 92 02 80 fb 01 0f 87 bb b9 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 5e 3f 92 02 01 90 48 c7 c7 20 8d 85 b5 e8 32 bf 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff
[ 17.473331][ T231] RSP: 0018:ffffc90000a67ce8 EFLAGS: 00010282
[ 17.473548][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.473804][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.474063][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6c3e134
[ 17.474321][ T231] R10: 0000000000000003 R11: ffffc90000a67880 R12: 0000000000000001
[ 17.474574][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.474828][ T231] FS: 00000000104333c0(0000) GS:ffff88807911a000(0000) knlGS:0000000000000000
[ 17.475126][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.475349][ T231] CR2: 00007f7485fae000 CR3: 00000000092fc004 CR4: 0000000000772ef0
[ 17.475600][ T231] PKRU: 55555554
[ 17.475737][ T231] Call Trace:
[ 17.475882][ T231]
[ 17.475988][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.476166][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.476356][ T231] ? netif_state_change+0x228/0x2c0
[ 17.476530][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.476741][ T231] ? generic_xdp_install+0x410/0x410
[ 17.476925][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.477104][ T231] tun_chr_close+0xc0/0x1c0
[ 17.477284][ T231] __fput+0x35c/0xa70
[ 17.477437][ T231] fput_close_sync+0xdd/0x1b0
[ 17.477610][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.477784][ T231] __x64_sys_close+0x7d/0xd0
[ 17.477966][ T231] do_syscall_64+0xc1/0xfd0
[ 17.478142][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.478360][ T231] RIP: 0033:0x4901eb
[ 17.478506][ T231] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 78 04 00 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 79 04 00 8b 44
[ 17.479098][ T231] RSP: 002b:00007ffc21773b40 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.479368][ T231] RAX: ffffffffffffffda RBX: 00007ffc217740a0 RCX: 00000000004901eb
[ 17.479623][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.479890][ T231] RBP: 00007ffc21773b80 R08: 0000000000000000 R09: 0000000000000000
[ 17.480142][ T231] R10: 000000001044dd80 R11: 0000000000000293 R12: 00007ffc21774018
[ 17.480401][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.480658][ T231]
[ 17.480799][ T231] irq event stamp: 1738903
[ 17.480985][ T231] hardirqs last enabled at (1738903): [] irqentry_exit+0x3b/0x80
[ 17.481274][ T231] hardirqs last disabled at (1738902): [] handle_softirqs+0x47f/0x610
[ 17.481571][ T231] softirqs last enabled at (1738868): [] handle_softirqs+0x352/0x610
[ 17.481860][ T231] softirqs last disabled at (1738861): [] irq_exit_rcu+0xab/0x100
[ 17.482156][ T231] ---[ end trace 0000000000000000 ]---