CVE-2022-49859

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net: lapbether: fix issue of invalid opcode in lapbeth_open()<br /> <br /> If lapb_register() failed when lapb device goes to up for the first time,<br /> the NAPI is not disabled. As a result, the invalid opcode issue is<br /> reported when the lapb device goes to up for the second time.<br /> <br /> The stack info is as follows:<br /> [ 1958.311422][T11356] kernel BUG at net/core/dev.c:6442!<br /> [ 1958.312206][T11356] invalid opcode: 0000 [#1] PREEMPT SMP KASAN<br /> [ 1958.315979][T11356] RIP: 0010:napi_enable+0x16a/0x1f0<br /> [ 1958.332310][T11356] Call Trace:<br /> [ 1958.332817][T11356] <br /> [ 1958.336135][T11356] lapbeth_open+0x18/0x90<br /> [ 1958.337446][T11356] __dev_open+0x258/0x490<br /> [ 1958.341672][T11356] __dev_change_flags+0x4d4/0x6a0<br /> [ 1958.345325][T11356] dev_change_flags+0x93/0x160<br /> [ 1958.346027][T11356] devinet_ioctl+0x1276/0x1bf0<br /> [ 1958.346738][T11356] inet_ioctl+0x1c8/0x2d0<br /> [ 1958.349638][T11356] sock_ioctl+0x5d1/0x750<br /> [ 1958.356059][T11356] __x64_sys_ioctl+0x3ec/0x1790<br /> [ 1958.365594][T11356] do_syscall_64+0x35/0x80<br /> [ 1958.366239][T11356] entry_SYSCALL_64_after_hwframe+0x46/0xb0<br /> [ 1958.377381][T11356]