[PATCH OLK-5.10 0/2] fix CVE-2024-46675
fix CVE-2024-46675 Krishna Kurapati (1): usb: dwc3: core: Skip setting event buffers for host only controllers Selvarasu Ganesan (1): usb: dwc3: core: Prevent USB core invalid event buffer address access drivers/usb/dwc3/core.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) -- 2.17.1
From: Krishna Kurapati <quic_kriskura@quicinc.com> stable inclusion from stable-5.10.225 commit 9e1c4d0d6ae9fedb934c3ff4394944d855db744b bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAR5YA CVE: CVE-2024-46675 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 89d7f962994604a3e3d480832788d06179abefc5 ] On some SoC's like SA8295P where the tertiary controller is host-only capable, GEVTADDRHI/LO, GEVTSIZ, GEVTCOUNT registers are not accessible. Trying to access them leads to a crash. For DRD/Peripheral supported controllers, event buffer setup is done again in gadget_pullup. Skip setup or cleanup of event buffers if controller is host-only capable. Suggested-by: Johan Hovold <johan@kernel.org> Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com> Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Reviewed-by: Johan Hovold <johan+linaro@kernel.org> Reviewed-by: Bjorn Andersson <andersson@kernel.org> Tested-by: Johan Hovold <johan+linaro@kernel.org> Link: https://lore.kernel.org/r/20240420044901.884098-4-quic_kriskura@quicinc.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Lin Ruifeng <linruifeng4@huawei.com> --- drivers/usb/dwc3/core.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 4a0eec176511..3c2a855c6452 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -405,6 +405,13 @@ static void dwc3_free_event_buffers(struct dwc3 *dwc) static int dwc3_alloc_event_buffers(struct dwc3 *dwc, unsigned length) { struct dwc3_event_buffer *evt; + unsigned int hw_mode; + + hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0); + if (hw_mode == DWC3_GHWPARAMS0_MODE_HOST) { + dwc->ev_buf = NULL; + return 0; + } evt = dwc3_alloc_one_event_buffer(dwc, length); if (IS_ERR(evt)) { @@ -426,6 +433,9 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc) { struct dwc3_event_buffer *evt; + if (!dwc->ev_buf) + return 0; + evt = dwc->ev_buf; evt->lpos = 0; dwc3_writel(dwc->regs, DWC3_GEVNTADRLO(0), @@ -443,6 +453,9 @@ void dwc3_event_buffers_cleanup(struct dwc3 *dwc) { struct dwc3_event_buffer *evt; + if (!dwc->ev_buf) + return; + evt = dwc->ev_buf; evt->lpos = 0; -- 2.17.1
From: Selvarasu Ganesan <selvarasu.g@samsung.com> stable inclusion from stable-5.10.225 commit b72da4d89b97da71e056cc4d1429b2bc426a9c2f bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAR5YA CVE: CVE-2024-46675 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- commit 14e497183df28c006603cc67fd3797a537eef7b9 upstream. This commit addresses an issue where the USB core could access an invalid event buffer address during runtime suspend, potentially causing SMMU faults and other memory issues in Exynos platforms. The problem arises from the following sequence. 1. In dwc3_gadget_suspend, there is a chance of a timeout when moving the USB core to the halt state after clearing the run/stop bit by software. 2. In dwc3_core_exit, the event buffer is cleared regardless of the USB core's status, which may lead to an SMMU faults and other memory issues. if the USB core tries to access the event buffer address. To prevent this hardware quirk on Exynos platforms, this commit ensures that the event buffer address is not cleared by software when the USB core is active during runtime suspend by checking its status before clearing the buffer address. Cc: stable <stable@kernel.org> Signed-off-by: Selvarasu Ganesan <selvarasu.g@samsung.com> Acked-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com> Link: https://lore.kernel.org/r/20240815064836.1491-1-selvarasu.g@samsung.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Lin Ruifeng <linruifeng4@huawei.com> --- drivers/usb/dwc3/core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index 3c2a855c6452..85f4529e78ef 100644 --- a/drivers/usb/dwc3/core.c +++ b/drivers/usb/dwc3/core.c @@ -452,9 +452,17 @@ int dwc3_event_buffers_setup(struct dwc3 *dwc) void dwc3_event_buffers_cleanup(struct dwc3 *dwc) { struct dwc3_event_buffer *evt; + u32 reg; if (!dwc->ev_buf) return; + /* + * Exynos platforms may not be able to access event buffer if the + * controller failed to halt on dwc3_core_exit(). + */ + reg = dwc3_readl(dwc->regs, DWC3_DSTS); + if (!(reg & DWC3_DSTS_DEVCTRLHLT)) + return; evt = dwc->ev_buf; -- 2.17.1
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