CVE-2022-49277

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> jffs2: fix memory leak in jffs2_do_mount_fs<br /> <br /> If jffs2_build_filesystem() in jffs2_do_mount_fs() returns an error,<br /> we can observe the following kmemleak report:<br /> <br /> --------------------------------------------<br /> unreferenced object 0xffff88811b25a640 (size 64):<br /> comm "mount", pid 691, jiffies 4294957728 (age 71.952s)<br /> hex dump (first 32 bytes):<br /> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................<br /> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................<br /> backtrace:<br /> [] kmem_cache_alloc_trace+0x584/0x880<br /> [] jffs2_sum_init+0x86/0x130<br /> [] jffs2_do_mount_fs+0x798/0xac0<br /> [] jffs2_do_fill_super+0x383/0xc30<br /> [] jffs2_fill_super+0x2ea/0x4c0<br /> [...]<br /> unreferenced object 0xffff88812c760000 (size 65536):<br /> comm "mount", pid 691, jiffies 4294957728 (age 71.952s)<br /> hex dump (first 32 bytes):<br /> bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................<br /> bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb bb ................<br /> backtrace:<br /> [] __kmalloc+0x6b9/0x910<br /> [] jffs2_sum_init+0xd7/0x130<br /> [] jffs2_do_mount_fs+0x798/0xac0<br /> [] jffs2_do_fill_super+0x383/0xc30<br /> [] jffs2_fill_super+0x2ea/0x4c0<br /> [...]<br /> --------------------------------------------<br /> <br /> This is because the resources allocated in jffs2_sum_init() are not<br /> released. Call jffs2_sum_exit() to release these resources to solve<br /> the problem.