DEBIAN-CVE-2023-53060

In the Linux kernel, the following vulnerability has been resolved: igb: revert rtnllock() that causes deadlock The commit 6faee3d4ee8b ("igb: Add lock to avoid data race") adds rtnllock to eliminate a false data race shown below (FREE from device detaching) | (USE from netdev core) igbremove | igbndogetvfconfig igbdisablesriov | vf >= adapter->vfsallocatedcount? kfree(adapter->vfdata) | adapter->vfsallocatedcount = 0 | | memcpy(... adapter->vfdata[vf] The above race will never happen and the extra rtnllock causes deadlock below [ 141.420169] <TASK> [ 141.420672] __schedule+0x2dd/0x840 [ 141.421427] schedule+0x50/0xc0 [ 141.422041] schedulepreemptdisabled+0x11/0x20 [ 141.422678] __mutexlock.isra.13+0x431/0x6b0 [ 141.423324] unregisternetdev+0xe/0x20 [ 141.423578] igbvfremove+0x45/0xe0 [igbvf] [ 141.423791] pcideviceremove+0x36/0xb0 [ 141.423990] devicereleasedriverinternal+0xc1/0x160 [ 141.424270] pcistopbusdevice+0x6d/0x90 [ 141.424507] pcistopandremovebusdevice+0xe/0x20 [ 141.424789] pciiovremovevirtfn+0xba/0x120 [ 141.425452] sriovdisable+0x2f/0xf0 [ 141.425679] igbdisablesriov+0x4e/0x100 [igb] [ 141.426353] igbremove+0xa0/0x130 [igb] [ 141.426599] pcideviceremove+0x36/0xb0 [ 141.426796] devicereleasedriverinternal+0xc1/0x160 [ 141.427060] driverdetach+0x44/0x90 [ 141.427253] busremovedriver+0x55/0xe0 [ 141.427477] pciunregister_driver+0x2a/0xa0 [ 141.428296] _x64sysdeletemodule+0x141/0x2b0 [ 141.429126] ? mntputnoexpire+0x4a/0x240 [ 141.429363] ? syscalltraceenter.isra.19+0x126/0x1a0 [ 141.429653] dosyscall64+0x5b/0x80 [ 141.429847] ? exittousermodeprepare+0x14d/0x1c0 [ 141.430109] ? syscallexittousermode+0x12/0x30 [ 141.430849] ? dosyscall64+0x67/0x80 [ 141.431083] ? syscallexittousermodeprepare+0x183/0x1b0 [ 141.431770] ? syscallexittousermode+0x12/0x30 [ 141.432482] ? dosyscall64+0x67/0x80 [ 141.432714] ? excpagefault+0x64/0x140 [ 141.432911] entrySYSCALL64afterhwframe+0x72/0xdc Since the igbdisablesriov() will call pcidisablesriov() before releasing any resources, the netdev core will synchronize the cleanup to avoid any races. This patch removes the useless rtnl(un)lock to guarantee correctness.