CVE-2021-46924

In the Linux kernel, the following vulnerability has been resolved: NFC:
st21nfca: Fix memory leak in device probe and remove ‘phy->pending_skb’ is
alloced when device probe, but forgot to free in the error handling path
and remove path, this cause memory leak as follows: unreferenced object
0xffff88800bc06800 (size 512): comm “8”, pid 11775, jiffies 4295159829 (age
9.032s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 … 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
… backtrace: [<00000000d66c09ce>]
__kmalloc_node_track_caller+0x1ed/0x450 [<00000000c93382b3>]
kmalloc_reserve+0x37/0xd0 [<000000005fea522c>] __alloc_skb+0x124/0x380
[<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2 Fix it by freeing
‘pending_skb’ in error and remove.