CVE-2022-49890

In the Linux kernel, the following vulnerability has been resolved: capabilities: fix potential memleak on error path from vfs_getxattr_alloc() In cap_inode_getsecurity(), we will use vfs_getxattr_alloc() to complete the memory allocation of tmpbuf, if we have completed the memory allocation of tmpbuf, but failed to call handler->get(...), there will be a memleak in below logic: |-- ret = (int)vfs_getxattr_alloc(mnt_userns, ...) | /* ^^^ alloc for tmpbuf */ |-- value = krealloc(*xattr_value, error + 1, flags) | /* ^^^ alloc memory */ |-- error = handler->get(handler, ...) | /* error! */ |-- *xattr_value = value | /* xattr_value is &tmpbuf (memory leak!) */ So we will try to free(tmpbuf) after vfs_getxattr_alloc() fails to fix it. [PM: subject line and backtrace tweaks]

• linux linux kernel (>= 4.14 < 4.14.299) • linux linux kernel (>= 4.15 < 4.19.265) • linux linux kernel (>= 4.20 < 5.4.224) • linux linux kernel (>= 5.5 < 5.10.154) • linux linux kernel (>= 5.11 < 5.15.78) • linux linux kernel (>= 5.16 < 6.0.8) • linux linux kernel 6.1