syzbot

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BUG: KASAN: double-free in kfree_bulk include/linux/slab.h:767 [inline]
BUG: KASAN: double-free in kvfree_rcu_bulk+0x454/0x550 kernel/rcu/tree.c:3385
Free of addr ffff88802b07f500 by task kworker/u32:8/1141

CPU: 3 UID: 0 PID: 1141 Comm: kworker/u32:8 Not tainted 6.12.0-rc5-syzkaller-00005-ge42b1a9a2557 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: events_unbound kfree_rcu_work
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0xc3/0x620 mm/kasan/report.c:488
 kasan_report_invalid_free+0xaa/0xd0 mm/kasan/report.c:563
 check_slab_allocation+0xfd/0x130 mm/kasan/common.c:225
 kasan_slab_pre_free include/linux/kasan.h:195 [inline]
 slab_free_hook mm/slub.c:2287 [inline]
 slab_free_freelist_hook mm/slub.c:2371 [inline]
 slab_free_bulk mm/slub.c:4603 [inline]
 kmem_cache_free_bulk.part.0+0x310/0x7c0 mm/slub.c:4847
 kfree_bulk include/linux/slab.h:767 [inline]
 kvfree_rcu_bulk+0x454/0x550 kernel/rcu/tree.c:3385
 kfree_rcu_work+0x2f2/0x5a0 kernel/rcu/tree.c:3464
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>

Allocated by task 6019:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:257 [inline]
 __do_kmalloc_node mm/slub.c:4264 [inline]
 __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4276
 kmalloc_noprof include/linux/slab.h:882 [inline]
 kzalloc_noprof include/linux/slab.h:1014 [inline]
 nl80211_set_cqm_rssi net/wireless/nl80211.c:13107 [inline]
 nl80211_set_cqm+0xa19/0x1790 net/wireless/nl80211.c:13174
 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2607
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661
 __sys_sendmsg+0x117/0x1f0 net/socket.c:2690
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 64:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:230 [inline]
 slab_free_hook mm/slub.c:2342 [inline]
 slab_free_freelist_hook mm/slub.c:2371 [inline]
 slab_free_bulk mm/slub.c:4603 [inline]
 kmem_cache_free_bulk.part.0+0x28e/0x7c0 mm/slub.c:4847
 kfree_bulk include/linux/slab.h:767 [inline]
 kvfree_rcu_bulk+0x454/0x550 kernel/rcu/tree.c:3385
 kvfree_rcu_drain_ready kernel/rcu/tree.c:3559 [inline]
 kfree_rcu_monitor+0x462/0x8b0 kernel/rcu/tree.c:3632
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Last potentially related work creation:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
 kvfree_call_rcu+0x74/0xbe0 kernel/rcu/tree.c:3810
 _cfg80211_unregister_wdev+0x38c/0x7f0 net/wireless/core.c:1238
 ieee80211_remove_interfaces+0x36d/0x760 net/mac80211/iface.c:2300
 ieee80211_unregister_hw+0x55/0x3a0 net/mac80211/main.c:1669
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5625 [inline]
 hwsim_exit_net+0x3ad/0x7d0 drivers/net/wireless/virtual/mac80211_hwsim.c:6505
 ops_exit_list+0xb0/0x180 net/core/net_namespace.c:173
 cleanup_net+0x5b7/0xb40 net/core/net_namespace.c:626
 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 kthread+0x2c1/0x3a0 kernel/kthread.c:389
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Second to last potentially related work creation:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541
 kvfree_call_rcu+0x74/0xbe0 kernel/rcu/tree.c:3810
 _cfg80211_unregister_wdev+0x38c/0x7f0 net/wireless/core.c:1238
 cfg80211_netdev_notifier_call+0xa5c/0x1110 net/wireless/core.c:1494
 notifier_call_chain+0xb9/0x410 kernel/notifier.c:93
 call_netdevice_notifiers_info+0xbe/0x140 net/core/dev.c:1996
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 __dev_change_net_namespace+0x46d/0x1360 net/core/dev.c:11583
 dev_change_net_namespace include/linux/netdevice.h:3944 [inline]
 cfg80211_switch_netns+0x11e/0x690 net/wireless/core.c:169
 nl80211_wiphy_netns+0x134/0x2b0 net/wireless/nl80211.c:12364
 genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
 genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
 genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2607
 ___sys_sendmsg+0x135/0x1e0 net/socket.c:2661
 __sys_sendmsg+0x117/0x1f0 net/socket.c:2690
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802b07f500
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 0 bytes inside of
 64-byte region [ffff88802b07f500, ffff88802b07f540)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2b07f
anon flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b0428c0 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000200020 00000001f5000000 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5952, tgid 5952 (syz-executor), ts 46294022202, free_ts 46272064430
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x101e/0x3070 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x223/0x25a0 mm/page_alloc.c:4733
 alloc_pages_mpol_noprof+0x2c9/0x610 mm/mempolicy.c:2265
 alloc_slab_page mm/slub.c:2412 [inline]
 allocate_slab mm/slub.c:2578 [inline]
 new_slab+0x2ba/0x3f0 mm/slub.c:2631
 ___slab_alloc+0xdac/0x1880 mm/slub.c:3818
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3908
 __slab_alloc_node mm/slub.c:3961 [inline]
 slab_alloc_node mm/slub.c:4122 [inline]
 __kmalloc_cache_noprof+0x2b4/0x300 mm/slub.c:4290
 kmalloc_noprof include/linux/slab.h:878 [inline]
 call_modprobe kernel/module/kmod.c:84 [inline]
 __request_module+0x2c6/0x6c0 kernel/module/kmod.c:173
 __rtnl_newlink+0x64c/0x1920 net/core/rtnetlink.c:3748
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:729 [inline]
 __sock_sendmsg net/socket.c:744 [inline]
 __sys_sendto+0x479/0x4d0 net/socket.c:2214
page last free pid 5952 tgid 5952 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0x5f4/0xdc0 mm/page_alloc.c:2638
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:247 [inline]
 slab_post_alloc_hook mm/slub.c:4085 [inline]
 slab_alloc_node mm/slub.c:4134 [inline]
 __kmalloc_cache_noprof+0x11e/0x300 mm/slub.c:4290
 kmalloc_noprof include/linux/slab.h:878 [inline]
 kzalloc_noprof include/linux/slab.h:1014 [inline]
 ref_tracker_alloc+0x17c/0x5b0 lib/ref_tracker.c:203
 __netdev_tracker_alloc include/linux/netdevice.h:4062 [inline]
 netdev_hold include/linux/netdevice.h:4091 [inline]
 netdev_hold include/linux/netdevice.h:4086 [inline]
 rx_queue_add_kobject net/core/net-sysfs.c:1106 [inline]
 net_rx_queue_update_kobjects+0x284/0x5f0 net/core/net-sysfs.c:1164
 register_queue_kobjects net/core/net-sysfs.c:1898 [inline]
 netdev_register_kobject+0x26d/0x3f0 net/core/net-sysfs.c:2143
 register_netdevice+0x1473/0x1e90 net/core/dev.c:10491
 team_newlink+0x92/0x160 drivers/net/team/team_core.c:2217
 rtnl_newlink_create net/core/rtnetlink.c:3539 [inline]
 __rtnl_newlink+0x1197/0x1920 net/core/rtnetlink.c:3759
 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3772
 rtnetlink_rcv_msg+0x3c7/0xea0 net/core/rtnetlink.c:6675
 netlink_rcv_skb+0x16b/0x440 net/netlink/af_netlink.c:2551
 netlink_unicast_kernel net/netlink/af_netlink.c:1331 [inline]
 netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1357
 netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1901

Memory state around the buggy address:
 ffff88802b07f400: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff88802b07f480: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff88802b07f500: fa fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
                   ^
 ffff88802b07f580: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
 ffff88802b07f600: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc
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