In the Linux kernel, the following vulnerability has been resolved:
orangefs: Fix kmemleak in orangefs{kernel,client}debug_init()
When insert and remove the orangefs module, there are memory leaked as below:
unreferenced object 0xffff88816b0cc000 (size 2048): comm "insmod", pid 783, jiffies 4294813439 (age 65.512s) hex dump (first 32 bytes): 6e 6f 6e 65 0a 00 00 00 00 00 00 00 00 00 00 00 none............ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<0000000031ab7788>] kmalloctrace+0x27/0xa0 [<000000005b405fee>] orangefsdebugfsinit.cold+0xaf/0x17f [<00000000e5a0085b>] 0xffffffffa02780f9 [<000000004232d9f7>] dooneinitcall+0x87/0x2a0 [<0000000054f22384>] doinitmodule+0xdf/0x320 [<000000003263bdea>] loadmodule+0x2f98/0x3330 [<0000000052cd4153>] _dosysfinitmodule+0x113/0x1b0 [<00000000250ae02b>] dosyscall64+0x35/0x80 [<00000000f11c03c7>] entrySYSCALL64afterhwframe+0x46/0xb0
Use the golbal variable as the buffer rather than dynamic allocate to slove the problem.