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BUG: KASAN: slab-use-after-free in cfusbl_device_notify+0x7c4/0x860 net/caif/caif_usb.c:138
Read of size 8 at addr ffff888076b866f0 by task kworker/u8:11/8099
CPU: 2 PID: 8099 Comm: kworker/u8:11 Not tainted 6.2.0-syzkaller-13277-g2eb29d59ddf0 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:319
print_report mm/kasan/report.c:430 [inline]
kasan_report+0x11c/0x130 mm/kasan/report.c:536
cfusbl_device_notify+0x7c4/0x860 net/caif/caif_usb.c:138
notifier_call_chain+0xb5/0x200 kernel/notifier.c:87
call_netdevice_notifiers_info+0xb5/0x130 net/core/dev.c:1937
call_netdevice_notifiers_extack net/core/dev.c:1975 [inline]
call_netdevice_notifiers net/core/dev.c:1989 [inline]
netdev_wait_allrefs_any net/core/dev.c:10228 [inline]
netdev_run_todo+0xc54/0x1100 net/core/dev.c:10342
default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11353
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
</TASK>
Allocated by task 5171:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:374 [inline]
____kasan_kmalloc mm/kasan/common.c:333 [inline]
__kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:383
kasan_kmalloc include/linux/kasan.h:196 [inline]
__do_kmalloc_node mm/slab_common.c:967 [inline]
__kmalloc_node+0x5d/0xd0 mm/slab_common.c:974
kmalloc_node include/linux/slab.h:610 [inline]
kvmalloc_node+0xa2/0x1a0 mm/util.c:603
kvmalloc include/linux/slab.h:737 [inline]
kvzalloc include/linux/slab.h:745 [inline]
alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10587
rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3312
veth_newlink+0x226/0x9c0 drivers/net/veth.c:1791
rtnl_newlink_create net/core/rtnetlink.c:3440 [inline]
__rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3657
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3670
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:722 [inline]
sock_sendmsg+0xde/0x190 net/socket.c:745
__sys_sendto+0x23a/0x340 net/socket.c:2145
__do_sys_sendto net/socket.c:2157 [inline]
__se_sys_sendto net/socket.c:2153 [inline]
__x64_sys_sendto+0xe1/0x1b0 net/socket.c:2153
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Freed by task 8099:
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
__cache_free mm/slab.c:3390 [inline]
__do_kmem_cache_free mm/slab.c:3577 [inline]
__kmem_cache_free+0xcd/0x2c0 mm/slab.c:3584
kvfree+0x46/0x50 mm/util.c:649
device_release+0xa3/0x240 drivers/base/core.c:2436
kobject_cleanup lib/kobject.c:681 [inline]
kobject_release lib/kobject.c:712 [inline]
kref_put include/linux/kref.h:65 [inline]
kobject_put+0x1c2/0x4d0 lib/kobject.c:729
netdev_run_todo+0x762/0x1100 net/core/dev.c:10361
default_device_exit_batch+0x456/0x5b0 net/core/dev.c:11353
ops_exit_list+0x125/0x170 net/core/net_namespace.c:174
cleanup_net+0x4ee/0xb10 net/core/net_namespace.c:613
process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390
worker_thread+0x669/0x1090 kernel/workqueue.c:2537
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
The buggy address belongs to the object at ffff888076b86000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 1776 bytes inside of
freed 4096-byte region [ffff888076b86000, ffff888076b87000)
The buggy address belongs to the physical page:
page:ffffea0001dae180 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x76b86
head:ffffea0001dae180 order:1 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x4fff00000010200(slab|head|node=1|zone=1|lastcpupid=0x7ff)
raw: 04fff00000010200 ffff88801244da00 ffffea0001dae110 ffffea0001dae210
raw: 0000000000000000 ffff888076b86000 0000000100000001 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0x44cc0(GFP_KERNEL|__GFP_RETRY_MAYFAIL|__GFP_COMP), pid 5171, tgid 5171 (syz-executor.2), ts 251988294802, free_ts 0
prep_new_page mm/page_alloc.c:2552 [inline]
get_page_from_freelist+0x1190/0x2f80 mm/page_alloc.c:4325
__alloc_pages+0x1cb/0x5c0 mm/page_alloc.c:5591
__alloc_pages_node include/linux/gfp.h:237 [inline]
kmem_getpages mm/slab.c:1360 [inline]
cache_grow_begin+0x9b/0x3b0 mm/slab.c:2570
fallback_alloc+0x1e2/0x2d0 mm/slab.c:3113
__do_cache_alloc mm/slab.c:3217 [inline]
slab_alloc_node mm/slab.c:3250 [inline]
__kmem_cache_alloc_node+0x105/0x3f0 mm/slab.c:3541
__do_kmalloc_node mm/slab_common.c:966 [inline]
__kmalloc_node+0x4d/0xd0 mm/slab_common.c:974
kmalloc_node include/linux/slab.h:610 [inline]
kvmalloc_node+0xa2/0x1a0 mm/util.c:603
kvmalloc include/linux/slab.h:737 [inline]
kvzalloc include/linux/slab.h:745 [inline]
alloc_netdev_mqs+0x9c/0x1250 net/core/dev.c:10587
rtnl_create_link+0xbeb/0xee0 net/core/rtnetlink.c:3312
veth_newlink+0x226/0x9c0 drivers/net/veth.c:1791
rtnl_newlink_create net/core/rtnetlink.c:3440 [inline]
__rtnl_newlink+0x10c2/0x1840 net/core/rtnetlink.c:3657
rtnl_newlink+0x68/0xa0 net/core/rtnetlink.c:3670
rtnetlink_rcv_msg+0x43d/0xd50 net/core/rtnetlink.c:6174
netlink_rcv_skb+0x165/0x440 net/netlink/af_netlink.c:2574
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x547/0x7f0 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x925/0xe30 net/netlink/af_netlink.c:1942
page_owner free stack trace missing
Memory state around the buggy address:
ffff888076b86580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888076b86600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888076b86680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff888076b86700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff888076b86780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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