- 06 Mar, 2017 6 commits
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Rolf Eike Beer authored
[ Upstream commit 3659f98b ] Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by:
Rolf Eike Beer <eb@emlix.com> Cc: stable@vger.kernel.org Signed-off-by:
Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by:
Sasha Levin <alexander.levin@verizon.com>
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Rolf Eike Beer authored
[ Upstream commit a2b1e8a2 ] Nothing in this minimal script seems to require bash. We often run these tests on embedded devices where the only shell available is the busybox ash. Use sh instead. Signed-off-by:
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Alan Stern authored
[ Upstream commit 0a8fd134 ] When checking a new device's descriptors, the USB core does not check for duplicate endpoint addresses. This can cause a problem when the sysfs files for those endpoints are created; trying to create multiple files with the same name will provoke a WARNING: WARNING: CPU: 2 PID: 865 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x8a/0xa0 sysfs: cannot create duplicate filename '/devices/platform/dummy_hcd.0/usb2/2-1/2-1:64.0/ep_05' Kernel panic - not syncing: panic_on_warn set ... CPU: 2 PID: 865 Comm: kworker/2:1 Not tainted 4.9.0-rc7+ #34 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Workqueue: usb_hub_wq hub_event ffff88006bee64c8 ffffffff81f96b8a ffffffff00000001 1ffff1000d7dcc2c ffffed000d7dcc24 0000000000000001 0000000041b58ab3 ffffffff8598b510 ffffffff81f968f8 ffffffff850fee20 ffffffff85cff020 dffffc0000000000 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81f96b8a>] dump_stack+0x292/0x398 lib/dump_stack.c:51 [<ffffffff8168c88e>] panic+0x1cb/0x3a9 kernel/panic.c:179 [<ffffffff812b80b4>] __warn+0x1c4/0x1e0 kernel/panic.c:542 [<ffffffff812b8195>] warn_slowpath_fmt+0xc5/0x110 kernel/panic.c:565 [<ffffffff819e70ca>] sysfs_warn_dup+0x8a/0xa0 fs/sysfs/dir.c:30 [<ffffffff819e7308>] sysfs_create_dir_ns+0x178/0x1d0 fs/sysfs/dir.c:59 [< inline >] create_dir lib/kobject.c:71 [<ffffffff81fa1b07>] kobject_add_internal+0x227/0xa60 lib/kobject.c:229 [< inline >] kobject_add_varg lib/kobject.c:366 [<ffffffff81fa2479>] kobject_add+0x139/0x220 lib/kobject.c:411 [<ffffffff82737a63>] device_add+0x353/0x1660 drivers/base/core.c:1088 [<ffffffff82738d8d>] device_register+0x1d/0x20 drivers/base/core.c:1206 [<ffffffff82cb77d3>] usb_create_ep_devs+0x163/0x260 drivers/usb/core/endpoint.c:195 [<ffffffff82c9f27b>] create_intf_ep_devs+0x13b/0x200 drivers/usb/core/message.c:1030 [<ffffffff82ca39d3>] usb_set_configuration+0x1083/0x18d0 drivers/usb/core/message.c:1937 [<ffffffff82cc9e2e>] generic_probe+0x6e/0xe0 drivers/usb/core/generic.c:172 [<ffffffff82caa7fa>] usb_probe_device+0xaa/0xe0 drivers/usb/core/driver.c:263 This patch prevents the problem by checking for duplicate endpoint addresses during enumeration and skipping any duplicates. Signed-off-by:
Alan Stern <stern@rowland.harvard.edu> Reported-by:
Andrey Konovalov <andreyknvl@google.com> Tested-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Oliver Neukum authored
[ Upstream commit 674aea07 ] This device gives the following error on detection. xhci_hcd 0000:00:11.0: ERROR Transfer event for disabled endpoint or incorrect stream ring The same error is not seen when it is added to unusual_device list with US_FL_NO_REPORT_OPCODES passed. Signed-off-by:
George Cherian <george.cherian@cavium.com> Signed-off-by:
Oliver Neukum <oneukun@suse.com> CC: stable@vger.kernel.org Signed-off-by:
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Bin Liu authored
[ Upstream commit c48400ba ] During dma teardown for dequque urb, if musb load is high, musb might generate bogus rx ep interrupt even when the rx fifo is flushed. In such case any of the follow log messages could happen. musb_host_rx 1853: BOGUS RX2 ready, csr 0000, count 0 musb_host_rx 1936: RX3 dma busy, csr 2020 As mentioned in the current inline comment, clearing ep interrupt in the teardown path avoids the bogus interrupt, so implement clear_ep_rxintr() callback. This bug seems to be existing since the initial driver for musb support, but I only validated the fix back to v4.1, so only cc stable for v4.1+. cc: stable@vger.kernel.org # 4.1+ Signed-off-by:
Bin Liu <b-liu@ti.com> Signed-off-by:
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Bin Liu authored
[ Upstream commit 6def85a3 ] During dma teardown for dequque urb, if musb load is high, musb might generate bogus rx ep interrupt even when the rx fifo is flushed. In such case any of the follow log messages could happen. musb_host_rx 1853: BOGUS RX2 ready, csr 0000, count 0 musb_host_rx 1936: RX3 dma busy, csr 2020 As mentioned in the current inline comment, clearing ep interrupt in the teardown path avoids the bogus interrupt. Clearing ep interrupt is platform dependent, so this patch adds a platform callback to allow glue driver to clear the ep interrupt. This bug seems to be existing since the initial driver for musb support, but I only validated the fix back to v4.1, so only cc stable for v4.1+. cc: stable@vger.kernel.org # 4.1+ Signed-off-by:
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- 03 Mar, 2017 34 commits
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James Hogan authored
[ Upstream commit 32eb12a6 ] Flush the KVM entry code from the icache on all CPUs, not just the one that built the entry code. Signed-off-by:
James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Cc: <stable@vger.kernel.org> # 3.16.x- Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Johannes Berg authored
[ Upstream commit 753aacfd ] A single netlink socket might own multiple interfaces *and* a scheduled scan request (which might belong to another interface), so when it goes away both may need to be destroyed. Remove the schedule_scan_stop indirection to fix this - it's only needed for interface destruction because of the way this works right now, with a single work taking care of all interfaces. Cc: stable@vger.kernel.org Fixes: 93a1e86c ("nl80211: Stop scheduled scan if netlink client disappears") Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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Takashi Iwai authored
[ Upstream commit c7efff92 ] Although the old quirk table showed ASUS X71SL with ALC663 codec being compatible with asus-mode3 fixup, the bugzilla reporter explained that asus-model8 fits better for the dual headphone controls. So be it. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=191781 Cc: <stable@vger.kernel.org> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
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Takashi Iwai authored
[ Upstream commit 85bcf96c ] ASUS ROG Ranger VIII with ALC1150 codec requires the extra GPIO pin to up for the front panel. Just use the existing fixup for setting up the GPIO pins. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=189411 Cc: <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit ef079936 ] Fix NULL-pointer dereference in open() should a malicious device lack the expected endpoints: Unable to handle kernel NULL pointer dereference at virtual address 00000030 .. [<bf06a6b0>] (ti_open [ti_usb_3410_5052]) from [<bf02e118>] (serial_port_activate+0x68/0x98 [usbserial]) Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit cc090924 ] Fix NULL-pointer dereference in open() should the device lack the expected endpoints: Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... PC is at spcp8x5_open+0x30/0xd0 [spcp8x5] Fixes: 619a6f1d ("USB: add usb-serial spcp8x5 driver") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit f09d1886 ] The write URB was being killed using the synchronous interface while holding a spin lock in close(). Simply drop the lock and busy-flag update, something which would have been taken care of by the completion handler if the URB was in flight. Fixes: f7a33e60 ("USB: serial: add quatech2 usb to serial driver") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 76ab439e ] Fix NULL-pointer dereference in open() should a type-0 or type-1 device lack the expected endpoints: Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... PC is at pl2303_open+0x38/0xec [pl2303] Note that a missing interrupt-in endpoint would have caused open() to fail. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 5afeef23 ] Fix NULL-pointer dereference in open() should the device lack the expected endpoints: Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... PC is at oti6858_open+0x30/0x1d0 [oti6858] Note that a missing interrupt-in endpoint would have caused open() to fail. Fixes: 49cdee0e ("USB: oti6858 usb-serial driver (in Nokia CA-42 cable)") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit a5bc0194 ] Fix NULL-pointer dereferences at open() and disconnect() should the device lack the expected bulk-out endpoints: Unable to handle kernel NULL pointer dereference at virtual address 000000b4 ... [c0170ff0>] (__lock_acquire) from [<c0172f00>] (lock_acquire+0x108/0x264) [<c0172f00>] (lock_acquire) from [<c06a5090>] (_raw_spin_lock_irqsave+0x58/0x6c) [<c06a5090>] (_raw_spin_lock_irqsave) from [<c0470684>] (tty_port_tty_set+0x28/0xa4) [<c0470684>] (tty_port_tty_set) from [<bf08d384>] (omninet_open+0x30/0x40 [omninet]) [<bf08d384>] (omninet_open [omninet]) from [<bf07c118>] (serial_port_activate+0x68/0x98 [usbserial]) Unable to handle kernel NULL pointer dereference at virtual address 00000234 ... [<bf01f418>] (omninet_disconnect [omninet]) from [<bf0016c0>] (usb_serial_disconnect+0xe4/0x100 [usbserial]) Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 5c75633e ] Fix NULL-pointer dereference in open() should the device lack the expected endpoints: Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... PC is at mos7840_open+0x88/0x8dc [mos7840] Note that we continue to treat the interrupt-in endpoint as optional for now. Fixes: 3f542974 ("USB: Moschip 7840 USB-Serial Driver") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit fde1faf8 ] A static usb-serial-driver structure that is used to initialise the interrupt URB was modified during probe depending on the currently probed device type, something which could break a parallel probe of a device of a different type. Fix this up by overriding the default completion callback for MCS7715 devices in attach() instead. We may want to use two usb-serial driver instances for the two types later. Fixes: fb088e33 ("USB: serial: add support for serial port on the moschip 7715") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 75dd211e ] Do not submit the interrupt URB until after the parport has been successfully registered to avoid another use-after-free in the completion handler when accessing the freed parport private data in case of a racing completion. Fixes: b69578df ("USB: usbserial: mos7720: add support for parallel port on moschip 7715") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 91a1ff4d ] The interrupt URB was submitted on probe but never stopped on probe errors. This can lead to use-after-free issues in the completion handler when accessing the freed usb-serial struct: Unable to handle kernel paging request at virtual address 6b6b6be7 ... [<bf052e70>] (mos7715_interrupt_callback [mos7720]) from [<c052a894>] (__usb_hcd_giveback_urb+0x80/0x140) [<c052a894>] (__usb_hcd_giveback_urb) from [<c052a9a4>] (usb_hcd_giveback_urb+0x50/0x138) [<c052a9a4>] (usb_hcd_giveback_urb) from [<c0550684>] (musb_giveback+0xc8/0x1cc) Fixes: b69578df ("USB: usbserial: mos7720: add support for parallel port on moschip 7715") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit b05aebc2 ] Fix NULL-pointer dereference at port open if a device lacks the expected bulk in and out endpoints. Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... [<bf071c20>] (mos7720_open [mos7720]) from [<bf0490e0>] (serial_port_activate+0x68/0x98 [usbserial]) [<bf0490e0>] (serial_port_activate [usbserial]) from [<c0470ca4>] (tty_port_open+0x9c/0xe8) [<c0470ca4>] (tty_port_open) from [<bf049d98>] (serial_open+0x48/0x6c [usbserial]) [<bf049d98>] (serial_open [usbserial]) from [<c0469178>] (tty_open+0xcc/0x5cc) Fixes: 0f64478c ("USB: add USB serial mos7720 driver") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 21ce5784 ] Fix NULL-pointer dereference in write() should the device lack the expected interrupt-out endpoint: Unable to handle kernel NULL pointer dereference at virtual address 00000054 ... PC is at kobil_write+0x144/0x2a0 [kobil_sct] Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 5d9b0f85 ] Check for the expected endpoints in attach() and fail loudly if not present. Note that failing to do this appears to be benign since da280e34 ("USB: keyspan_pda: clean up write-urb busy handling") which prevents a NULL-pointer dereference in write() by never marking a non-existent write-urb as free. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> # < v3.3 Signed-off-by:
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Johan Hovold authored
[ Upstream commit 90507d54 ] Fix NULL-pointer dereference at open should the device lack a bulk-in or bulk-out endpoint: Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... PC is at iuu_open+0x78/0x59c [iuu_phoenix] Fixes: 07c3b1a1 ("USB: remove broken usb-serial num_endpoints check") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit a323fefc ] Fix NULL-pointer dereference when clearing halt at open should a malicious device lack the expected endpoints when in download mode. Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... [<bf011ed8>] (edge_open [io_ti]) from [<bf000118>] (serial_port_activate+0x68/0x98 [usbserial]) [<bf000118>] (serial_port_activate [usbserial]) from [<c0470ca4>] (tty_port_open+0x9c/0xe8) [<c0470ca4>] (tty_port_open) from [<bf000da0>] (serial_open+0x48/0x6c [usbserial]) [<bf000da0>] (serial_open [usbserial]) from [<c0469178>] (tty_open+0xcc/0x5cc) Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 0dd40842 ] Fix NULL-pointer dereference when initialising URBs at open should a non-EPIC device lack a bulk-in or interrupt-in endpoint. Unable to handle kernel NULL pointer dereference at virtual address 00000028 ... PC is at edge_open+0x24c/0x3e8 [io_edgeport] Note that the EPIC-device probe path has the required sanity checks so this makes those checks partially redundant. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit c4ac4496 ] Make sure to free the URB transfer buffer in case submission fails (e.g. due to a disconnect). Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Johan Hovold authored
[ Upstream commit 3dca0111 ] Fix NULL-pointer dereference when clearing halt at open should the device lack a bulk-out endpoint. Unable to handle kernel NULL pointer dereference at virtual address 00000030 ... PC is at cyberjack_open+0x40/0x9c [cyberjack] Fixes: 1da177e4 ("Linux-2.6.12-rc2") Cc: stable <stable@vger.kernel.org> Signed-off-by:
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Wan Ahmad Zainie authored
[ Upstream commit 6c97cfc1 ] Intel Apollo Lake also requires XHCI_PME_STUCK_QUIRK. Adding its PCI ID to quirk. Cc: <stable@vger.kernel.org> Signed-off-by:
Wan Ahmad Zainie <wan.ahmad.zainie.wan.mohamad@intel.com> Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
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Lu Baolu authored
[ Upstream commit 4dea7077 ] In command timer function, xhci_handle_command_timeout(), xhci->lock is unlocked before call into xhci_abort_cmd_ring(). This might cause race between the timer function and the event handler. The xhci_abort_cmd_ring() function sets the CMD_RING_ABORT bit in the command register and polling it until the setting takes effect. A stop command ring event might be handled between writing the abort bit and polling for it. The event handler will restart the command ring, which causes the failure of polling, and we ever believed that we failed to stop it. As a bonus, this also fixes some issues of calling functions without locking in xhci_handle_command_timeout(). Cc: <stable@vger.kernel.org> # 3.7+ Signed-off-by:
Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by:
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Mathias Nyman authored
[ Upstream commit a5a1b951 ] If we get a command completion event at the same time as the command timeout work starts on another cpu we might end up aborting the wrong command. If the command completion takes the xhci lock before the timeout work, it will handle the command, pick the next command, mark it as current_cmd, and re-queue the timeout work. When the timeout work finally gets the lock It will start aborting the wrong command. This case can be resolved by checking if the timeout work is pending inside the timeout function itself. A new timeout work can only be pending if the command completed and a new command was queued. If there are no more commands pending then command completion will set the current_cmd to NULL, which is already handled in the timeout work. Cc: <stable@vger.kernel.org> Reported-by:
Baolin Wang <baolin.wang@linaro.org> Signed-off-by:
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Baolin Wang authored
[ Upstream commit 2a7cfdf3 ] When current command was supposed to be aborted, host will free the command in handle_cmd_completion() function. But it might be still referenced by xhci->current_cmd, which need to set NULL. Cc: <stable@vger.kernel.org> Signed-off-by:
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Lu Baolu authored
[ Upstream commit 2b985467 ] handle_cmd_completion() frees a command structure which might be still referenced by xhci->current_cmd. This might cause problem when xhci->current_cmd is accessed after that. A real-life case could be like this. The host takes a very long time to respond to a command, and the command timer is fired at the same time when the command completion event arrives. The command completion handler frees xhci->current_cmd before the timer function can grab xhci->lock. Afterward, timer function grabs the lock and go ahead with checking and setting members of xhci->current_cmd. Cc: <stable@vger.kernel.org> # v3.16+ Signed-off-by:
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Mathias Nyman authored
[ Upstream commit ee8665e2 ] the tt_info provided by a HS hub might be in use to by a child device Make sure we free the devices in the correct order. This is needed in special cases such as when xhci controller is reset when resuming from hibernate, and all virt_devices are freed. Also free the virt_devices starting from max slot_id as children more commonly have higher slot_id than parent. CC: <stable@vger.kernel.org> Reported-by:
Guenter Roeck <groeck@chromium.org> Tested-by:
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Bartosz Golaszewski authored
[ Upstream commit ef37427a ] Similarly to the aemif clock - this screws up the linked list of clock children. Create a separate clock for mdio inheriting the rate from emac_clk. Cc: <stable@vger.kernel.org> # 3.12.x- Signed-off-by:
Bartosz Golaszewski <bgolaszewski@baylibre.com> [nsekhar@ti.com: add a comment over mdio_clk to explaing its existence + commit headline updates] Signed-off-by:
Sekhar Nori <nsekhar@ti.com> Signed-off-by:
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Alan Stern authored
[ Upstream commit 1c069b05 ] Andrey Konovalov's fuzz testing of gadgetfs showed that we should improve the driver's checks for valid configuration descriptors passed in by the user. In particular, the driver needs to verify that the wTotalLength value in the descriptor is not too short (smaller than USB_DT_CONFIG_SIZE). And the check for whether wTotalLength is too large has to be changed, because the driver assumes there is always enough room remaining in the buffer to hold a device descriptor (at least USB_DT_DEVICE_SIZE bytes). This patch adds the additional check and fixes the existing check. It may do a little more than strictly necessary, but one extra check won't hurt. Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Alan Stern authored
[ Upstream commit add333a8 ] Andrey Konovalov reports that fuzz testing with syzkaller causes a KASAN use-after-free bug report in gadgetfs: BUG: KASAN: use-after-free in gadgetfs_setup+0x208a/0x20e0 at addr ffff88003dfe5bf2 Read of size 2 by task syz-executor0/22994 CPU: 3 PID: 22994 Comm: syz-executor0 Not tainted 4.9.0-rc7+ #16 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff88006df06a18 ffffffff81f96aba ffffffffe0528500 1ffff1000dbe0cd6 ffffed000dbe0cce ffff88006df068f0 0000000041b58ab3 ffffffff8598b4c8 ffffffff81f96828 1ffff1000dbe0ccd ffff88006df06708 ffff88006df06748 Call Trace: <IRQ> [ 201.343209] [< inline >] __dump_stack lib/dump_stack.c:15 <IRQ> [ 201.343209] [<ffffffff81f96aba>] dump_stack+0x292/0x398 lib/dump_stack.c:51 [<ffffffff817e4dec>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:159 [< inline >] print_address_description mm/kasan/report.c:197 [<ffffffff817e5080>] kasan_report_error+0x1f0/0x4e0 mm/kasan/report.c:286 [< inline >] kasan_report mm/kasan/report.c:306 [<ffffffff817e562a>] __asan_report_load_n_noabort+0x3a/0x40 mm/kasan/report.c:337 [< inline >] config_buf drivers/usb/gadget/legacy/inode.c:1298 [<ffffffff8322c8fa>] gadgetfs_setup+0x208a/0x20e0 drivers/usb/gadget/legacy/inode.c:1368 [<ffffffff830fdcd0>] dummy_timer+0x11f0/0x36d0 drivers/usb/gadget/udc/dummy_hcd.c:1858 [<ffffffff814807c1>] call_timer_fn+0x241/0x800 kernel/time/timer.c:1308 [< inline >] expire_timers kernel/time/timer.c:1348 [<ffffffff81482de6>] __run_timers+0xa06/0xec0 kernel/time/timer.c:1641 [<ffffffff814832c1>] run_timer_softirq+0x21/0x80 kernel/time/timer.c:1654 [<ffffffff84f4af8b>] __do_softirq+0x2fb/0xb63 kernel/softirq.c:284 The cause of the bug is subtle. The dev_config() routine gets called twice by the fuzzer. The first time, the user data contains both a full-speed configuration descriptor and a high-speed config descriptor, causing dev->hs_config to be set. But it also contains an invalid device descriptor, so the buffer containing the descriptors is deallocated and dev_config() returns an error. The second time dev_config() is called, the user data contains only a full-speed config descriptor. But dev->hs_config still has the stale pointer remaining from the first call, causing the routine to think that there is a valid high-speed config. Later on, when the driver dereferences the stale pointer to copy that descriptor, we get a use-after-free access. The fix is simple: Clear dev->hs_config if the passed-in data does not contain a high-speed config descriptor. Signed-off-by:
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Alan Stern authored
[ Upstream commit faab5098 ] Andrey Konovalov reports that fuzz testing with syzkaller causes a KASAN warning in gadgetfs: BUG: KASAN: slab-out-of-bounds in dev_config+0x86f/0x1190 at addr ffff88003c47e160 Write of size 65537 by task syz-executor0/6356 CPU: 3 PID: 6356 Comm: syz-executor0 Not tainted 4.9.0-rc7+ #19 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff88003c107ad8 ffffffff81f96aba ffffffff3dc11ef0 1ffff10007820eee ffffed0007820ee6 ffff88003dc11f00 0000000041b58ab3 ffffffff8598b4c8 ffffffff81f96828 ffffffff813fb4a0 ffff88003b6eadc0 ffff88003c107738 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81f96aba>] dump_stack+0x292/0x398 lib/dump_stack.c:51 [<ffffffff817e4dec>] kasan_object_err+0x1c/0x70 mm/kasan/report.c:159 [< inline >] print_address_description mm/kasan/report.c:197 [<ffffffff817e5080>] kasan_report_error+0x1f0/0x4e0 mm/kasan/report.c:286 [<ffffffff817e5705>] kasan_report+0x35/0x40 mm/kasan/report.c:306 [< inline >] check_memory_region_inline mm/kasan/kasan.c:308 [<ffffffff817e3fb9>] check_memory_region+0x139/0x190 mm/kasan/kasan.c:315 [<ffffffff817e4044>] kasan_check_write+0x14/0x20 mm/kasan/kasan.c:326 [< inline >] copy_from_user arch/x86/include/asm/uaccess.h:689 [< inline >] ep0_write drivers/usb/gadget/legacy/inode.c:1135 [<ffffffff83228caf>] dev_config+0x86f/0x1190 drivers/usb/gadget/legacy/inode.c:1759 [<ffffffff817fdd55>] __vfs_write+0x5d5/0x760 fs/read_write.c:510 [<ffffffff817ff650>] vfs_write+0x170/0x4e0 fs/read_write.c:560 [< inline >] SYSC_write fs/read_write.c:607 [<ffffffff81803a5b>] SyS_write+0xfb/0x230 fs/read_write.c:599 [<ffffffff84f47ec1>] entry_SYSCALL_64_fastpath+0x1f/0xc2 Indeed, there is a comment saying that the value of len is restricted to a 16-bit integer, but the code doesn't actually do this. This patch fixes the warning. It replaces the comment with a computation that forces the amount of data copied from the user in ep0_write() to be no larger than the wLength size for the control transfer, which is a 16-bit quantity. Signed-off-by:
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Greg Kroah-Hartman authored
[ Upstream commit 0994b0a2 ] Andrey Konovalov reported that we were not properly checking the upper limit before of a device configuration size before calling memdup_user(), which could cause some problems. So set the upper limit to PAGE_SIZE * 4, which should be good enough for all devices. Reported-by:
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Alan Stern authored
[ Upstream commit bcdbeb84 ] The stop_activity() routine in dummy-hcd is supposed to unlink all active requests for every endpoint, among other things. But it doesn't handle ep0. As a result, fuzz testing can generate a WARNING like the following: WARNING: CPU: 0 PID: 4410 at drivers/usb/gadget/udc/dummy_hcd.c:672 dummy_free_request+0x153/0x170 Modules linked in: CPU: 0 PID: 4410 Comm: syz-executor Not tainted 4.9.0-rc7+ #32 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 ffff88006a64ed10 ffffffff81f96b8a ffffffff41b58ab3 1ffff1000d4c9d35 ffffed000d4c9d2d ffff880065f8ac00 0000000041b58ab3 ffffffff8598b510 ffffffff81f968f8 0000000041b58ab3 ffffffff859410e0 ffffffff813f0590 Call Trace: [< inline >] __dump_stack lib/dump_stack.c:15 [<ffffffff81f96b8a>] dump_stack+0x292/0x398 lib/dump_stack.c:51 [<ffffffff812b808f>] __warn+0x19f/0x1e0 kernel/panic.c:550 [<ffffffff812b831c>] warn_slowpath_null+0x2c/0x40 kernel/panic.c:585 [<ffffffff830fcb13>] dummy_free_request+0x153/0x170 drivers/usb/gadget/udc/dummy_hcd.c:672 [<ffffffff830ed1b0>] usb_ep_free_request+0xc0/0x420 drivers/usb/gadget/udc/core.c:195 [<ffffffff83225031>] gadgetfs_unbind+0x131/0x190 drivers/usb/gadget/legacy/inode.c:1612 [<ffffffff830ebd8f>] usb_gadget_remove_driver+0x10f/0x2b0 drivers/usb/gadget/udc/core.c:1228 [<ffffffff830ec084>] usb_gadget_unregister_driver+0x154/0x240 drivers/usb/gadget/udc/core.c:1357 This patch fixes the problem by iterating over all the endpoints in the driver's ep array instead of iterating over the gadget's ep_list, which explicitly leaves out ep0. Signed-off-by:
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