CVE-2022-49803

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> netdevsim: Fix memory leak of nsim_dev-&gt;fa_cookie<br /> <br /> kmemleak reports this issue:<br /> <br /> unreferenced object 0xffff8881bac872d0 (size 8):<br /> comm "sh", pid 58603, jiffies 4481524462 (age 68.065s)<br /> hex dump (first 8 bytes):<br /> 04 00 00 00 de ad be ef ........<br /> backtrace:<br /> [] __kmalloc+0x49/0x150<br /> [] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim]<br /> [] full_proxy_write+0xf3/0x180<br /> [] vfs_write+0x1c5/0xaf0<br /> [] ksys_write+0xed/0x1c0<br /> [] do_syscall_64+0x3b/0x90<br /> [] entry_SYSCALL_64_after_hwframe+0x63/0xcd<br /> <br /> The issue occurs in the following scenarios:<br /> <br /> nsim_dev_trap_fa_cookie_write()<br /> kmalloc() fa_cookie<br /> nsim_dev-&gt;fa_cookie = fa_cookie<br /> ..<br /> nsim_drv_remove()<br /> <br /> The fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To<br /> fix, add kfree(nsim_dev-&gt;fa_cookie) to nsim_drv_remove().