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>] _kmallocnodetrackcaller+0x1ed/0x450 [<00000000c93382b3>] kmallocreserve+0x37/0xd0 [<000000005fea522c>] _allocskb+0x124/0x380 [<0000000019f29f9a>] st21nfcahcii2cprobe+0x170/0x8f2
Fix it by freeing 'pending_skb' in error and remove.