[ 15.773853][ T233] ================================================================== [ 15.774205][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0 [ 15.774433][ T233] Read of size 1 at addr ffff88800bb3468c by task packetdrill/233 [ 15.774680][ T233] [ 15.774770][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 15.774775][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.774778][ T233] Call Trace: [ 15.774783][ T233] [ 15.774784][ T233] dump_stack_lvl+0x82/0xc0 [ 15.774794][ T233] print_address_description.constprop.0+0x2c/0x3a0 [ 15.774813][ T233] ? kobject_put+0xbb/0xd0 [ 15.774816][ T233] print_report+0xb4/0x270 [ 15.774820][ T233] ? kobject_put+0xbb/0xd0 [ 15.774823][ T233] ? kasan_addr_to_slab+0x21/0x70 [ 15.774827][ T233] ? kobject_put+0xbb/0xd0 [ 15.774830][ T233] kasan_report+0xca/0x100 [ 15.774834][ T233] ? kobject_put+0xbb/0xd0 [ 15.774839][ T233] kobject_put+0xbb/0xd0 [ 15.774842][ T233] netdev_run_todo+0x5f0/0xc60 [ 15.774852][ T233] ? rtnl_is_locked+0x15/0x20 [ 15.774857][ T233] ? netif_state_change+0x228/0x2c0 [ 15.774860][ T233] ? call_netdevice_notifiers_info+0x100/0x100 [ 15.774863][ T233] ? generic_xdp_install+0x410/0x410 [ 15.774867][ T233] ? tun_chr_close+0xae/0x1c0 [ 15.774883][ T233] tun_chr_close+0xc0/0x1c0 [ 15.774886][ T233] __fput+0x35c/0xa70 [ 15.774898][ T233] fput_close_sync+0xdd/0x1b0 [ 15.774901][ T233] ? alloc_file_clone+0xf0/0xf0 [ 15.774905][ T233] __x64_sys_close+0x7d/0xd0 [ 15.774910][ T233] do_syscall_64+0xc1/0xfd0 [ 15.774918][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.774928][ T233] RIP: 0033:0x4901eb [ 15.774933][ T233] 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 [ 15.774936][ T233] RSP: 002b:00007ffd4ec497c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 15.774944][ T233] RAX: ffffffffffffffda RBX: 00007ffd4ec49d20 RCX: 00000000004901eb [ 15.774946][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 15.774948][ T233] RBP: 00007ffd4ec49800 R08: 0000000000000000 R09: 0000000000000000 [ 15.774950][ T233] R10: 0000000000000004 R11: 0000000000000293 R12: 00007ffd4ec49c98 [ 15.774952][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 15.774958][ T233] [ 15.774959][ T233] [ 15.781519][ T233] The buggy address belongs to the physical page: [ 15.781727][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xbb34 [ 15.782010][ T233] flags: 0x80000000000000(node=0|zone=1) [ 15.782184][ T233] raw: 0080000000000000 ffffea000025aa08 ffff88803063bc40 0000000000000000 [ 15.782472][ T233] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 15.782780][ T233] page dumped because: kasan: bad access detected [ 15.782990][ T233] [ 15.783076][ T233] Memory state around the buggy address: [ 15.783238][ T233] ffff88800bb34580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.783475][ T233] ffff88800bb34600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.783709][ T233] >ffff88800bb34680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.783940][ T233] ^ [ 15.784061][ T233] ffff88800bb34700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.784297][ T233] ffff88800bb34780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 15.784523][ T233] ================================================================== [ 15.784890][ T233] Disabling lock debugging due to kernel taint [ 15.785090][ T233] ------------[ cut here ]------------ [ 15.785243][ T233] refcount_t: underflow; use-after-free. [ 15.785477][ T233] WARNING: CPU: 0 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 15.785779][ T233] Modules linked in: [ 15.785907][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 15.786256][ T233] Tainted: [B]=BAD_PAGE [ 15.786377][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.786580][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 15.786811][ T233] 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 45 8a 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 [ 15.787360][ T233] RSP: 0018:ffffc90000b27ce8 EFLAGS: 00010282 [ 15.787556][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 15.787793][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 15.788023][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff15be134 [ 15.788254][ T233] R10: 0000000000000003 R11: ffffc90000b27880 R12: 0000000000000001 [ 15.788483][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 15.788727][ T233] FS: 000000002f1f23c0(0000) GS:ffff8880a441a000(0000) knlGS:0000000000000000 [ 15.788993][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 15.789187][ T233] CR2: 00007ff8a491f000 CR3: 000000000c6d7002 CR4: 0000000000772ef0 [ 15.789420][ T233] PKRU: 55555554 [ 15.789538][ T233] Call Trace: [ 15.789665][ T233] [ 15.789751][ T233] netdev_run_todo+0x5f0/0xc60 [ 15.789909][ T233] ? rtnl_is_locked+0x15/0x20 [ 15.790070][ T233] ? netif_state_change+0x228/0x2c0 [ 15.790222][ T233] ? call_netdevice_notifiers_info+0x100/0x100 [ 15.790412][ T233] ? generic_xdp_install+0x410/0x410 [ 15.790564][ T233] ? tun_chr_close+0xae/0x1c0 [ 15.790731][ T233] tun_chr_close+0xc0/0x1c0 [ 15.790887][ T233] __fput+0x35c/0xa70 [ 15.791007][ T233] fput_close_sync+0xdd/0x1b0 [ 15.791167][ T233] ? alloc_file_clone+0xf0/0xf0 [ 15.791322][ T233] __x64_sys_close+0x7d/0xd0 [ 15.791475][ T233] do_syscall_64+0xc1/0xfd0 [ 15.791641][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 15.791830][ T233] RIP: 0033:0x4901eb [ 15.791955][ T233] 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 [ 15.792494][ T233] RSP: 002b:00007ffd4ec497c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 15.792732][ T233] RAX: ffffffffffffffda RBX: 00007ffd4ec49d20 RCX: 00000000004901eb [ 15.792960][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005 [ 15.793195][ T233] RBP: 00007ffd4ec49800 R08: 0000000000000000 R09: 0000000000000000 [ 15.793433][ T233] R10: 0000000000000004 R11: 0000000000000293 R12: 00007ffd4ec49c98 [ 15.793680][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001 [ 15.793921][ T233] [ 15.794035][ T233] irq event stamp: 1971877 [ 15.794186][ T233] hardirqs last enabled at (1971877): [] irqentry_exit+0x3b/0x80 [ 15.794463][ T233] hardirqs last disabled at (1971876): [] handle_softirqs+0x47f/0x610 [ 15.794765][ T233] softirqs last enabled at (1971580): [] handle_softirqs+0x352/0x610 [ 15.795032][ T233] softirqs last disabled at (1971573): [] irq_exit_rcu+0xab/0x100 [ 15.795306][ T233] ---[ end trace 0000000000000000 ]---