[ 18.567319][ T279] ip (279) used greatest stack depth: 23952 bytes left [ 446.649284][ T1914] ================================================================== [ 446.649613][ T1914] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 446.649955][ T1914] Read of size 1 at addr ffff888005e046ac by task ip/1914 [ 446.650204][ T1914] [ 446.650293][ T1914] CPU: 3 UID: 0 PID: 1914 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 446.650298][ T1914] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 446.650301][ T1914] Call Trace: [ 446.650303][ T1914] [ 446.650305][ T1914] dump_stack_lvl+0x82/0xc0 [ 446.650312][ T1914] print_address_description.constprop.0+0x2c/0x3a0 [ 446.650318][ T1914] ? kobject_put+0xbb/0xd0 [ 446.650322][ T1914] print_report+0xb4/0x270 [ 446.650325][ T1914] ? kobject_put+0xbb/0xd0 [ 446.650328][ T1914] ? kasan_addr_to_slab+0x21/0x70 [ 446.650331][ T1914] ? kobject_put+0xbb/0xd0 [ 446.650334][ T1914] kasan_report+0xca/0x100 [ 446.650338][ T1914] ? kobject_put+0xbb/0xd0 [ 446.650343][ T1914] kobject_put+0xbb/0xd0 [ 446.650347][ T1914] netdev_run_todo+0x5f0/0xc60 [ 446.650351][ T1914] ? dev_ingress_queue_create+0x190/0x190 [ 446.650354][ T1914] ? generic_xdp_install+0x410/0x410 [ 446.650359][ T1914] ? vrf_dellink+0xff/0x150 [vrf] [ 446.650365][ T1914] ? vrf_map_unregister_dev+0x480/0x480 [vrf] [ 446.650370][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.650378][ T1914] rtnl_dellink+0x350/0xa30 [ 446.650383][ T1914] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 446.650401][ T1914] ? find_held_lock+0x2b/0x80 [ 446.650406][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.650415][ T1914] ? find_held_lock+0x2b/0x80 [ 446.650418][ T1914] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 446.650421][ T1914] ? __lock_release+0x5d/0x170 [ 446.650426][ T1914] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 446.650429][ T1914] rtnetlink_rcv_msg+0x709/0xc00 [ 446.650432][ T1914] ? rtnl_port_fill+0x850/0x850 [ 446.650435][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.650442][ T1914] netlink_rcv_skb+0x121/0x340 [ 446.650446][ T1914] ? rtnl_port_fill+0x850/0x850 [ 446.650449][ T1914] ? netlink_ack+0xdd0/0xdd0 [ 446.650456][ T1914] ? netlink_deliver_tap+0x13e/0x340 [ 446.650459][ T1914] ? netlink_deliver_tap+0xc3/0x340 [ 446.650462][ T1914] netlink_unicast+0x4aa/0x780 [ 446.650467][ T1914] ? netlink_attachskb+0x810/0x810 [ 446.650470][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.650476][ T1914] netlink_sendmsg+0x714/0xbd0 [ 446.650480][ T1914] ? netlink_unicast+0x780/0x780 [ 446.650483][ T1914] ? __import_iovec+0x230/0x3b0 [ 446.650491][ T1914] ? netlink_unicast+0x780/0x780 [ 446.650494][ T1914] ____sys_sendmsg+0x3dd/0x890 [ 446.650500][ T1914] ? get_timestamp.constprop.0+0x380/0x380 [ 446.650503][ T1914] ? __copy_msghdr+0x3c0/0x3c0 [ 446.650511][ T1914] ___sys_sendmsg+0xed/0x170 [ 446.650514][ T1914] ? kasan_record_aux_stack+0x8c/0xa0 [ 446.650517][ T1914] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 446.650524][ T1914] ? copy_msghdr_from_user+0x110/0x110 [ 446.650528][ T1914] ? find_held_lock+0x2b/0x80 [ 446.650533][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.650538][ T1914] ? find_held_lock+0x2b/0x80 [ 446.650542][ T1914] ? __virt_addr_valid+0x22a/0x450 [ 446.650547][ T1914] ? __lock_release+0x5d/0x170 [ 446.650553][ T1914] __sys_sendmsg+0x10b/0x1a0 [ 446.650556][ T1914] ? __call_rcu_common.constprop.0+0x318/0x630 [ 446.650560][ T1914] ? __sys_sendmsg_sock+0x20/0x20 [ 446.650568][ T1914] ? rcu_is_watching+0x12/0xb0 [ 446.650571][ T1914] do_syscall_64+0xc1/0xfd0 [ 446.650579][ T1914] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 446.650585][ T1914] RIP: 0033:0x7f241968c1d7 [ 446.650590][ T1914] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 446.650593][ T1914] RSP: 002b:00007ffca91cedf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 446.650599][ T1914] RAX: ffffffffffffffda RBX: 00007ffca91cf520 RCX: 00007f241968c1d7 [ 446.650601][ T1914] RDX: 0000000000000000 RSI: 00007ffca91cee60 RDI: 0000000000000005 [ 446.650603][ T1914] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 446.650604][ T1914] R10: 00007f2419588f60 R11: 0000000000000246 R12: 0000000000000002 [ 446.650606][ T1914] R13: 00000000690df20a R14: 0000000000499600 R15: 0000000000000000 [ 446.650613][ T1914] [ 446.650614][ T1914] [ 446.665213][ T1914] Allocated by task 335: [ 446.665370][ T1914] kasan_save_stack+0x24/0x40 [ 446.665561][ T1914] kasan_save_track+0x14/0x30 [ 446.665735][ T1914] __kasan_kmalloc+0x7b/0x90 [ 446.665949][ T1914] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 446.666136][ T1914] alloc_netdev_mqs+0x7d/0x1370 [ 446.666313][ T1914] rtnl_create_link+0xa9e/0xe20 [ 446.666501][ T1914] rtnl_newlink_create+0x203/0x770 [ 446.666674][ T1914] __rtnl_newlink+0x231/0xa30 [ 446.666854][ T1914] rtnl_newlink+0x693/0xa60 [ 446.667037][ T1914] rtnetlink_rcv_msg+0x709/0xc00 [ 446.667214][ T1914] netlink_rcv_skb+0x121/0x340 [ 446.667389][ T1914] netlink_unicast+0x4aa/0x780 [ 446.667558][ T1914] netlink_sendmsg+0x714/0xbd0 [ 446.667727][ T1914] ____sys_sendmsg+0x3dd/0x890 [ 446.667918][ T1914] ___sys_sendmsg+0xed/0x170 [ 446.668107][ T1914] __sys_sendmsg+0x10b/0x1a0 [ 446.668279][ T1914] do_syscall_64+0xc1/0xfd0 [ 446.668556][ T1914] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 446.668770][ T1914] [ 446.668867][ T1914] Freed by task 1914: [ 446.669011][ T1914] kasan_save_stack+0x24/0x40 [ 446.669197][ T1914] kasan_save_track+0x14/0x30 [ 446.669373][ T1914] __kasan_save_free_info+0x3b/0x60 [ 446.669545][ T1914] __kasan_slab_free+0x3f/0x60 [ 446.669713][ T1914] kfree+0x21d/0x540 [ 446.669852][ T1914] device_release+0x9c/0x210 [ 446.670259][ T1914] kobject_cleanup+0xfe/0x360 [ 446.670429][ T1914] netdev_run_todo+0x81f/0xc60 [ 446.670610][ T1914] rtnl_dellink+0x350/0xa30 [ 446.670782][ T1914] rtnetlink_rcv_msg+0x709/0xc00 [ 446.671088][ T1914] netlink_rcv_skb+0x121/0x340 [ 446.671265][ T1914] netlink_unicast+0x4aa/0x780 [ 446.671431][ T1914] netlink_sendmsg+0x714/0xbd0 [ 446.671608][ T1914] ____sys_sendmsg+0x3dd/0x890 [ 446.671778][ T1914] ___sys_sendmsg+0xed/0x170 [ 446.671970][ T1914] __sys_sendmsg+0x10b/0x1a0 [ 446.672160][ T1914] do_syscall_64+0xc1/0xfd0 [ 446.672330][ T1914] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 446.672559][ T1914] [ 446.672652][ T1914] The buggy address belongs to the object at ffff888005e04000 [ 446.672652][ T1914] which belongs to the cache kmalloc-4k of size 4096 [ 446.673195][ T1914] The buggy address is located 1708 bytes inside of [ 446.673195][ T1914] freed 4096-byte region [ffff888005e04000, ffff888005e05000) [ 446.673612][ T1914] [ 446.673699][ T1914] The buggy address belongs to the physical page: [ 446.674035][ T1914] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5e00 [ 446.674340][ T1914] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 446.674607][ T1914] flags: 0x80000000000040(head|node=0|zone=1) [ 446.674881][ T1914] page_type: f5(slab) [ 446.675027][ T1914] raw: 0080000000000040 ffff888001043700 ffffea0000212e10 ffffea0000201210 [ 446.675343][ T1914] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 446.675804][ T1914] head: 0080000000000040 ffff888001043700 ffffea0000212e10 ffffea0000201210 [ 446.676153][ T1914] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 446.676565][ T1914] head: 0080000000000003 ffffea0000178001 00000000ffffffff 00000000ffffffff [ 446.676885][ T1914] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 446.677310][ T1914] page dumped because: kasan: bad access detected [ 446.677529][ T1914] [ 446.677616][ T1914] Memory state around the buggy address: [ 446.677791][ T1914] ffff888005e04580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 446.678166][ T1914] ffff888005e04600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 446.678411][ T1914] >ffff888005e04680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 446.678664][ T1914] ^ [ 446.678961][ T1914] ffff888005e04700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 446.679210][ T1914] ffff888005e04780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 446.679449][ T1914] ================================================================== [ 446.679857][ T1914] Disabling lock debugging due to kernel taint [ 446.680104][ T1914] ------------[ cut here ]------------ [ 446.680259][ T1914] refcount_t: underflow; use-after-free. [ 446.680543][ T1914] WARNING: CPU: 3 PID: 1914 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 446.680878][ T1914] Modules linked in: vrf veth [ 446.681072][ T1914] CPU: 3 UID: 0 PID: 1914 Comm: ip Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 446.681526][ T1914] Tainted: [B]=BAD_PAGE [ 446.681652][ T1914] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 446.681905][ T1914] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 446.682247][ T1914] Code: 7d 93 02 80 fb 01 0f 87 bb 99 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 a8 7d 93 02 01 90 48 c7 c7 60 8d 45 95 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 [ 446.683033][ T1914] RSP: 0018:ffffc90002d171f0 EFLAGS: 00010286 [ 446.683254][ T1914] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 446.683623][ T1914] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 446.683929][ T1914] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2bbe134 [ 446.684213][ T1914] R10: 0000000000000003 R11: ffffc90002d16d80 R12: 0000000000000001 [ 446.684478][ T1914] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 446.684779][ T1914] FS: 00007f24194be800(0000) GS:ffff88809f172000(0000) knlGS:0000000000000000 [ 446.685108][ T1914] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 446.685321][ T1914] CR2: 00000000004e5ea0 CR3: 0000000005e53002 CR4: 0000000000772ef0 [ 446.685599][ T1914] PKRU: 55555554 [ 446.685748][ T1914] Call Trace: [ 446.685907][ T1914] [ 446.686013][ T1914] netdev_run_todo+0x5f0/0xc60 [ 446.686202][ T1914] ? dev_ingress_queue_create+0x190/0x190 [ 446.686381][ T1914] ? generic_xdp_install+0x410/0x410 [ 446.686556][ T1914] ? vrf_dellink+0xff/0x150 [vrf] [ 446.686747][ T1914] ? vrf_map_unregister_dev+0x480/0x480 [vrf] [ 446.686987][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.687166][ T1914] rtnl_dellink+0x350/0xa30 [ 446.687442][ T1914] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 446.687692][ T1914] ? find_held_lock+0x2b/0x80 [ 446.688004][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.688286][ T1914] ? find_held_lock+0x2b/0x80 [ 446.688460][ T1914] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 446.688647][ T1914] ? __lock_release+0x5d/0x170 [ 446.688962][ T1914] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 446.689179][ T1914] rtnetlink_rcv_msg+0x709/0xc00 [ 446.689349][ T1914] ? rtnl_port_fill+0x850/0x850 [ 446.689522][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.689704][ T1914] netlink_rcv_skb+0x121/0x340 [ 446.689899][ T1914] ? rtnl_port_fill+0x850/0x850 [ 446.690087][ T1914] ? netlink_ack+0xdd0/0xdd0 [ 446.690281][ T1914] ? netlink_deliver_tap+0x13e/0x340 [ 446.690452][ T1914] ? netlink_deliver_tap+0xc3/0x340 [ 446.690635][ T1914] netlink_unicast+0x4aa/0x780 [ 446.690953][ T1914] ? netlink_attachskb+0x810/0x810 [ 446.691140][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.691432][ T1914] netlink_sendmsg+0x714/0xbd0 [ 446.691616][ T1914] ? netlink_unicast+0x780/0x780 [ 446.691815][ T1914] ? __import_iovec+0x230/0x3b0 [ 446.692015][ T1914] ? netlink_unicast+0x780/0x780 [ 446.692200][ T1914] ____sys_sendmsg+0x3dd/0x890 [ 446.692490][ T1914] ? get_timestamp.constprop.0+0x380/0x380 [ 446.692761][ T1914] ? __copy_msghdr+0x3c0/0x3c0 [ 446.692959][ T1914] ___sys_sendmsg+0xed/0x170 [ 446.693134][ T1914] ? kasan_record_aux_stack+0x8c/0xa0 [ 446.693316][ T1914] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 446.693550][ T1914] ? copy_msghdr_from_user+0x110/0x110 [ 446.693857][ T1914] ? find_held_lock+0x2b/0x80 [ 446.694054][ T1914] ? __lock_acquire+0x449/0x7e0 [ 446.694336][ T1914] ? find_held_lock+0x2b/0x80 [ 446.694513][ T1914] ? __virt_addr_valid+0x22a/0x450 [ 446.694695][ T1914] ? __lock_release+0x5d/0x170 [ 446.694891][ T1914] __sys_sendmsg+0x10b/0x1a0 [ 446.695180][ T1914] ? __call_rcu_common.constprop.0+0x318/0x630 [ 446.695410][ T1914] ? __sys_sendmsg_sock+0x20/0x20 [ 446.695598][ T1914] ? rcu_is_watching+0x12/0xb0 [ 446.695789][ T1914] do_syscall_64+0xc1/0xfd0 [ 446.696001][ T1914] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 446.696219][ T1914] RIP: 0033:0x7f241968c1d7 [ 446.696412][ T1914] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 446.697092][ T1914] RSP: 002b:00007ffca91cedf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 446.697377][ T1914] RAX: ffffffffffffffda RBX: 00007ffca91cf520 RCX: 00007f241968c1d7 [ 446.697787][ T1914] RDX: 0000000000000000 RSI: 00007ffca91cee60 RDI: 0000000000000005 [ 446.698104][ T1914] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 446.698485][ T1914] R10: 00007f2419588f60 R11: 0000000000000246 R12: 0000000000000002 [ 446.698788][ T1914] R13: 00000000690df20a R14: 0000000000499600 R15: 0000000000000000 [ 446.699087][ T1914] [ 446.699227][ T1914] irq event stamp: 42963 [ 446.699477][ T1914] hardirqs last enabled at (42963): [] irqentry_exit+0x3b/0x80 [ 446.699857][ T1914] hardirqs last disabled at (42962): [] handle_softirqs+0x47f/0x610 [ 446.700289][ T1914] softirqs last enabled at (42552): [] handle_softirqs+0x352/0x610 [ 446.700618][ T1914] softirqs last disabled at (42545): [] irq_exit_rcu+0xab/0x100 [ 446.700981][ T1914] ---[ end trace 0000000000000000 ]---