In the Linux kernel, the following vulnerability has been resolved:
xhci: Fix Panther point NULL pointer deref at full-speed re-enumeration
re-enumerating full-speed devices after a failed address device command
can trigger a NULL pointer dereference.
Full-speed devices may need to reconfigure the endpoint 0 Max Packet Size
value during enumeration. Usb core calls usb_ep0_reinit() in this case,
which ends up calling xhci_configure_endpoint().
On Panther point xHC the xhci_configure_endpoint() function will
additionally check and reserve bandwidth in software. Other hosts do
this in hardware
If xHC address device command fails then a new xhci_virt_device structure
is allocated as part of re-enabling the slot, but the bandwidth table
pointers are not set up properly here.
This triggers the NULL pointer dereference the next time usb_ep0_reinit()
is called and xhci_configure_endpoint() tries to check and reserve
bandwidth
[46710.713538] usb 3-1: new full-speed USB device number 5 using xhci_hcd
[46710.713699] usb 3-1: Device not responding to setup address.
[46710.917684] usb 3-1: Device not responding to setup address.
[46711.125536] usb 3-1: device not accepting address 5, error -71
[46711.125594] BUG: kernel NULL pointer dereference, address: 0000000000000008
[46711.125600] #PF: supervisor read access in kernel mode
[46711.125603] #PF: error_code(0x0000) - not-present page
[46711.125606] PGD 0 P4D 0
[46711.125610] Oops: Oops: 0000 [#1] PREEMPT SMP PTI
[46711.125615] CPU: 1 PID: 25760 Comm: kworker/1:2 Not tainted 6.10.3_2 #1
[46711.125620] Hardware name: Gigabyte Technology Co., Ltd.
[46711.125623] Workqueue: usb_hub_wq hub_event [usbcore]
[46711.125668] RIP: 0010:xhci_reserve_bandwidth (drivers/usb/host/xhci.c
Fix this by making sure bandwidth table pointers are set up correctly
after a failed address device command, and additionally by avoiding
checking for bandwidth in cases like this where no actual endpoints are
added or removed, i.e. only context for default control endpoint 0 is
evaluated.
[
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/host/xhci.c"
],
"versions": [
{
"version": "651aaf36a7d7",
"lessThan": "ef0a0e616b27",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "a57b0ebabe68",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "0f0654318e25",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "365ef7c4277f",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "5ad898ae8241",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "6b99de301d78",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "8fb9d412ebe2",
"status": "affected",
"versionType": "git"
},
{
"version": "651aaf36a7d7",
"lessThan": "af8e119f52e9",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/host/xhci.c"
],
"versions": [
{
"version": "4.15",
"status": "affected"
},
{
"version": "0",
"lessThan": "4.15",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "4.19.321",
"lessThanOrEqual": "4.19.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.4.283",
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.10.225",
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "5.15.166",
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.1.107",
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.6.48",
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.10.7",
"lessThanOrEqual": "6.10.*",
"status": "unaffected",
"versionType": "custom"
},
{
"version": "6.11",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
]
git.kernel.org/stable/c/0f0654318e25b2c185e245ba4a591e42fabb5e59
git.kernel.org/stable/c/365ef7c4277fdd781a695c3553fa157d622d805d
git.kernel.org/stable/c/5ad898ae82412f8a689d59829804bff2999dd0ea
git.kernel.org/stable/c/6b99de301d78e1f5249e57ef2c32e1dec3df2bb1
git.kernel.org/stable/c/8fb9d412ebe2f245f13481e4624b40e651570cbd
git.kernel.org/stable/c/a57b0ebabe6862dce0a2e0f13e17941ad72fc56b
git.kernel.org/stable/c/af8e119f52e9c13e556be9e03f27957554a84656
git.kernel.org/stable/c/ef0a0e616b2789bb804a0ce5e161db03170a85b6