CVE-2021-46956

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> virtiofs: fix memory leak in virtio_fs_probe()<br /> <br /> When accidentally passing twice the same tag to qemu, kmemleak ended up<br /> reporting a memory leak in virtiofs. Also, looking at the log I saw the<br /> following error (that&amp;#39;s when I realised the duplicated tag):<br /> <br /> virtiofs: probe of virtio5 failed with error -17<br /> <br /> Here&amp;#39;s the kmemleak log for reference:<br /> <br /> unreferenced object 0xffff888103d47800 (size 1024):<br /> comm "systemd-udevd", pid 118, jiffies 4294893780 (age 18.340s)<br /> hex dump (first 32 bytes):<br /> 00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00 .....N..........<br /> ff ff ff ff ff ff ff ff 80 90 02 a0 ff ff ff ff ................<br /> backtrace:<br /> [] virtio_fs_probe+0x171/0x7ae [virtiofs]<br /> [] virtio_dev_probe+0x15f/0x210<br /> [] really_probe+0xea/0x430<br /> [] device_driver_attach+0xa8/0xb0<br /> [] __driver_attach+0x98/0x140<br /> [] bus_for_each_dev+0x7b/0xc0<br /> [] bus_add_driver+0x11b/0x1f0<br /> [] driver_register+0x8f/0xe0<br /> [] 0xffffffffa002c013<br /> [] do_one_initcall+0x64/0x2e0<br /> [] do_init_module+0x5c/0x260<br /> [] __do_sys_finit_module+0xb5/0x120<br /> [] do_syscall_64+0x33/0x40<br /> [] entry_SYSCALL_64_after_hwframe+0x44/0xae