- 22 Mar, 2017 9 commits
-
-
Brian Russell authored
[ Upstream commit 1158632b ] When using IPv6 transport and a default dst, a pointer to the configured source address is passed into the route lookup. If no source address is configured, then the value is overwritten. IPv6 route lookup ignores egress ifindex match if the source address is set, so if egress ifindex match is desired, the source address must be passed as any. The overwrite breaks this for subsequent lookups. Avoid this by copying the configured address to an existing stack variable and pass a pointer to that instead. Fixes: 272d96a5 ("net: vxlan: lwt: Use source ip address during route lookup.") Signed-off-by:
Brian Russell <brussell@brocade.com> Acked-by:
Jiri Benc <jbenc@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
David Forster authored
[ Upstream commit 7dcdf941 ] Align vti6 with vti by returning GRE_KEY flag. This enables iproute2 to display tunnel keys on "ip -6 tunnel show" Signed-off-by:
David Forster <dforster@brocade.com> Signed-off-by:
-
Matthias Schiffer authored
[ Upstream commit 4e37d691 ] The incorrect check caused an off-by-one error: the maximum VID 0xffffff was unusable. Fixes: d342894c ("vxlan: virtual extensible lan") Signed-off-by:
Matthias Schiffer <mschiffer@universe-factory.net> Acked-by:
-
Marcelo Ricardo Leitner authored
[ Upstream commit dfcb9f4f ] commit 2dcab598 ("sctp: avoid BUG_ON on sctp_wait_for_sndbuf") attempted to avoid a BUG_ON call when the association being used for a sendmsg() is blocked waiting for more sndbuf and another thread did a peeloff operation on such asoc, moving it to another socket. As Ben Hutchings noticed, then in such case it would return without locking back the socket and would cause two unlocks in a row. Further analysis also revealed that it could allow a double free if the application managed to peeloff the asoc that is created during the sendmsg call, because then sctp_sendmsg() would try to free the asoc that was created only for that call. This patch takes another approach. It will deny the peeloff operation if there is a thread sleeping on the asoc, so this situation doesn't exist anymore. This avoids the issues described above and also honors the syscalls that are already being handled (it can be multiple sendmsg calls). Joint work with Xin Long. Fixes: 2dcab598 ("sctp: avoid BUG_ON on sctp_wait_for_sndbuf") Cc: Alexander Popov <alex.popov@linux.com> Cc: Ben Hutchings <ben@decadent.org.uk> Signed-off-by:
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com> Signed-off-by:
Xin Long <lucien.xin@gmail.com> Signed-off-by:
-
Tariq Toukan authored
[ Upstream commit 36154be4 ] In cqe compression with striding RQ, the decompression of the CQE field wqe_counter was done with a wrong wraparound value. This caused handling cqes with a wrong pointer to wqe (rx descriptor) and creating SKBs with wrong data, pointing to wrong (and already consumed) strides/pages. The meaning of the CQE field wqe_counter in striding RQ holds the stride index instead of the WQE index. Hence, when decompressing a CQE, wqe_counter should have wrapped-around the number of strides in a single multi-packet WQE. We dropped this wrap-around mask at all in CQE decompression of striding RQ. It is not needed as in such cases the CQE compression session would break because of different value of wqe_id field, starting a new compression session. Tested: ethtool -K ethxx lro off/on ethtool --set-priv-flags ethxx rx_cqe_compress on super_netperf 16 {ipv4,ipv6} -t TCP_STREAM -m 50 -D verified no csum errors and no page refcount issues. Fixes: 7219ab34 ("net/mlx5e: CQE compression") Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Reported-by:
Tom Herbert <tom@herbertland.com> Cc: kernel-team@fb.com Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com> Signed-off-by:
-
Saeed Mahameed authored
[ Upstream commit 6dc4b54e ] When the admin enables/disables cqe compression, updating mpwqe stride size is required: CQE compress ON ==> stride size = 256B CQE compress OFF ==> stride size = 64B This is already done on driver load via mlx5e_set_rq_type_params, all we need is just to call it on arbitrary admin changes of cqe compression state via priv flags or when changing timestamping state (as it is mutually exclusive with cqe compression). This bug introduces no functional damage, it only makes cqe compression occur less often, since in ConnectX4-LX CQE compression is performed only on packets smaller than stride size. Tested: ethtool --set-priv-flags ethxx rx_cqe_compress on pktgen with 64 < pkt size < 256 and netperf TCP_STREAM (IPv4/IPv6) verify `ethtool -S ethxx | grep compress` are advancing more often (rapidly) Fixes: 7219ab34 ("net/mlx5e: CQE compression") Signed-off-by:
-
Tariq Toukan authored
[ Upstream commit b0d4660b ] Some of RQ type parameters are derived from CQE compression state flag, CQE compression flag was initialized only after RQ type parameters setup. This leads to load RQ with stride size smaller than what we want for when CQE compression is on. This bug introduces no functional damage, it only makes CQE compression occur less often, since in ConnectX4-LX CQE compression is performed only on packets smaller than stride size. Fix this by marking default status of CQE compression in PFLAG prior to calling mlx5e_set_rq_priv_params(), as it inits some fields based on it. Tested: load driver on systems where rx CQE compress will be on (MH) pktgen with 64 < pkt size < 256 and netperf TCP_STREAM (IPv4/IPv6) verify `ethtool -S ethxx | grep compress` are advancing more often (rapidly) Fixes: 2fc4bfb7 ("net/mlx5e: Dynamic RQ type infrastructure") Signed-off-by:
-
Tariq Toukan authored
[ Upstream commit 4078e637 ] When rq_type is Striding RQ, no room of SKB_RESERVE is needed as SKB allocation is not done via build_skb. Fixes: e4b85508 ("net/mlx5e: Slightly reduce hardware LRO size") Signed-off-by:
-
Saeed Mahameed authored
[ Upstream commit 6f08a22c ] Currently vport representors are added only on driver load and removed on driver unload. Apparently we forgot to handle them when we added the seamless reset flow feature. This caused to leave the representors netdevs alive and active with open HW resources on pci shutdown and on error reset flows. To overcome this we move their handling to interface attach/detach, so they would be cleaned up on shutdown and recreated on reset flows. Fixes: 26e59d80 ("net/mlx5e: Implement mlx5e interface attach/detach callbacks") Signed-off-by:
Hadar Hen Zion <hadarh@mellanox.com> Reviewed-by:
Roi Dayan <roid@mellanox.com> Signed-off-by:
-
- 18 Mar, 2017 31 commits
-
-
Greg Kroah-Hartman authored
-
Kamal Heib authored
commit 45bded2c upstream. Make sure that the Q counters are supported by the FW before trying to allocate/deallocte them, this will avoid driver load failure when they aren't supported by the FW. Fixes: 0837e86a ('IB/mlx5: Add per port counters') Signed-off-by:
Kamal Heib <kamalh@mellanox.com> Reviewed-by:
Mark Bloch <markb@mellanox.com> Signed-off-by:
Leon Romanovsky <leon@kernel.org> Signed-off-by:
Doug Ledford <dledford@redhat.com> Signed-off-by:
-
Theodore Ts'o authored
commit 0d06863f upstream. Fix a BUG when the kernel tries to mount a file system constructed as follows: echo foo > foo.txt mke2fs -Fq -t ext4 -O encrypt foo.img 100 debugfs -w foo.img << EOF write foo.txt a set_inode_field a i_flags 0x80800 set_super_value s_last_orphan 12 quit EOF root@kvm-xfstests:~# mount -o loop foo.img /mnt [ 160.238770] ------------[ cut here ]------------ [ 160.240106] kernel BUG at /usr/projects/linux/ext4/fs/ext4/inode.c:3874! [ 160.240106] invalid opcode: 0000 [#1] SMP [ 160.240106] Modules linked in: [ 160.240106] CPU: 0 PID: 2547 Comm: mount Tainted: G W 4.10.0-rc3-00034-gcdd33b941b67 #227 [ 160.240106] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.1-1 04/01/2014 [ 160.240106] task: f4518000 task.stack: f47b6000 [ 160.240106] EIP: ext4_block_zero_page_range+0x1a7/0x2b4 [ 160.240106] EFLAGS: 00010246 CPU: 0 [ 160.240106] EAX: 00000001 EBX: f7be4b50 ECX: f47b7dc0 EDX: 00000007 [ 160.240106] ESI: f43b05a8 EDI: f43babec EBP: f47b7dd0 ESP: f47b7dac [ 160.240106] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 160.240106] CR0: 80050033 CR2: bfd85b08 CR3: 34a00680 CR4: 000006f0 [ 160.240106] Call Trace: [ 160.240106] ext4_truncate+0x1e9/0x3e5 [ 160.240106] ext4_fill_super+0x286f/0x2b1e [ 160.240106] ? set_blocksize+0x2e/0x7e [ 160.240106] mount_bdev+0x114/0x15f [ 160.240106] ext4_mount+0x15/0x17 [ 160.240106] ? ext4_calculate_overhead+0x39d/0x39d [ 160.240106] mount_fs+0x58/0x115 [ 160.240106] vfs_kern_mount+0x4b/0xae [ 160.240106] do_mount+0x671/0x8c3 [ 160.240106] ? _copy_from_user+0x70/0x83 [ 160.240106] ? strndup_user+0x31/0x46 [ 160.240106] SyS_mount+0x57/0x7b [ 160.240106] do_int80_syscall_32+0x4f/0x61 [ 160.240106] entry_INT80_32+0x2f/0x2f [ 160.240106] EIP: 0xb76b919e [ 160.240106] EFLAGS: 00000246 CPU: 0 [ 160.240106] EAX: ffffffda EBX: 08053838 ECX: 08052188 EDX: 080537e8 [ 160.240106] ESI: c0ed0000 EDI: 00000000 EBP: 080537e8 ESP: bfa13660 [ 160.240106] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b [ 160.240106] Code: 59 8b 00 a8 01 0f 84 09 01 00 00 8b 07 66 25 00 f0 66 3d 00 80 75 61 89 f8 e8 3e e2 ff ff 84 c0 74 56 83 bf 48 02 00 00 00 75 02 <0f> 0b 81 7d e8 00 10 00 00 74 02 0f 0b 8b 43 04 8b 53 08 31 c9 [ 160.240106] EIP: ext4_block_zero_page_range+0x1a7/0x2b4 SS:ESP: 0068:f47b7dac [ 160.317241] ---[ end trace d6a773a375c810a5 ]--- The problem is that when the kernel tries to truncate an inode in ext4_truncate(), it tries to clear any on-disk data beyond i_size. Without the encryption key, it can't do that, and so it triggers a BUG. E2fsck does *not* provide this service, and in practice most file systems have their orphan list processed by e2fsck, so to avoid crashing, this patch skips this step if we don't have access to the encryption key (which is the case when processing the orphan list; in all other cases, we will have the encryption key, or the kernel wouldn't have allowed the file to be opened). An open question is whether the fact that e2fsck isn't clearing the bytes beyond i_size causing problems --- and if we've lived with it not doing it for so long, can we drop this from the kernel replay of the orphan list in all cases (not just when we don't have the key for encrypted inodes). Addresses-Google-Bug: #35209576 Signed-off-by:
Theodore Ts'o <tytso@mit.edu> Signed-off-by:
Eric Biggers <ebiggers@google.com> Signed-off-by:
-
Sean Young authored
commit 41380868 upstream. When the protocol is set via the sysfs protocols attribute, the decoder is loaded. However, when it is not when a device is first plugged in or registered. Fixes: acc1c3c6 ("[media] media: rc: load decoder modules on-demand") Signed-off-by:
Sean Young <sean@mess.org> Signed-off-by:
Mauro Carvalho Chehab <mchehab@s-opensource.com> Signed-off-by:
-
Mikulas Patocka authored
commit d67a5f4b upstream. Commit df2cb6da ("block: Avoid deadlocks with bio allocation by stacking drivers") created a workqueue for every bio set and code in bio_alloc_bioset() that tries to resolve some low-memory deadlocks by redirecting bios queued on current->bio_list to the workqueue if the system is low on memory. However other deadlocks (see below **) may happen, without any low memory condition, because generic_make_request is queuing bios to current->bio_list (rather than submitting them). ** the related dm-snapshot deadlock is detailed here: https://www.redhat.com/archives/dm-devel/2016-July/msg00065.html Fix this deadlock by redirecting any bios on current->bio_list to the bio_set's rescue workqueue on every schedule() call. Consequently, when the process blocks on a mutex, the bios queued on current->bio_list are dispatched to independent workqueus and they can complete without waiting for the mutex to be available. The structure blk_plug contains an entry cb_list and this list can contain arbitrary callback functions that are called when the process blocks. To implement this fix DM (ab)uses the onstack plug's cb_list interface to get its flush_current_bio_list() called at schedule() time. This fixes the snapshot deadlock - if the map method blocks, flush_current_bio_list() will be called and it redirects bios waiting on current->bio_list to appropriate workqueues. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1267650 Depends-on: df2cb6da ("block: Avoid deadlocks with bio allocation by stacking drivers") Signed-off-by:
Mikulas Patocka <mpatocka@redhat.com> Signed-off-by:
Mike Snitzer <snitzer@redhat.com> Signed-off-by:
-
Sean Young authored
commit 0265634e upstream. When the interrupt requested with devm_request_irq(), serial_ir.rcdev is still null so will cause null deference if the irq handler is called early on. Also ensure that timeout_timer is setup. Link: http://lkml.kernel.org/r/CA+55aFxsh2uF8gi5sN_guY3Z+tiLv7LpJYKBw+y8vqLzp+TsnQ@mail.gmail.com [mchehab@s-opensource.com: moved serial_ir_probe() back to its original place] Signed-off-by:
-
Takashi Iwai authored
commit d8e9b2b9 upstream. send_display_send_uevent() sends two environment variable, and the first one GVT_DISPLAY_READY is set including a new line at the end of the string; that is obviously superfluous and wrong -- at least, it *looks* so when you only read the code. However, it doesn't appear in the actual output by a (supposedly unexpected) trick. The code uses snprintf() and truncates the string in size 20 bytes. This makes the string as GVT_DISPLAY_READY=0 or ...=1 including the trailing NUL-letter. That is, the '\n' found in the format string is always cut off as a result. Although the code gives the correct result, it is confusing. This patch addresses it, just removing the superfluous '\n' from the format string for avoiding further confusion. If the argument "ready" were not a bool, the size 20 should be corrected as well. But it's a bool, so we can leave the magic number 20 as is for now. FWIW, the bug was spotted by a new GCC7 warning: drivers/gpu/drm/i915/gvt/handlers.c: In function 'pvinfo_mmio_write': drivers/gpu/drm/i915/gvt/handlers.c:1042:34: error: 'snprintf' output truncated before the last format character [-Werror=format-truncation=] snprintf(display_ready_str, 20, "GVT_DISPLAY_READY=%d\n", ready); ^~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/i915/gvt/handlers.c:1042:2: note: 'snprintf' output 21 bytes into a destination of size 20 snprintf(display_ready_str, 20, "GVT_DISPLAY_READY=%d\n", ready); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Fixes: 04d348ae ("drm/i915/gvt: vGPU display virtualization") Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1025903Reported-by:
Richard Biener <rguenther@suse.com> Signed-off-by:
Takashi Iwai <tiwai@suse.de> Signed-off-by:
Zhenyu Wang <zhenyuw@linux.intel.com> Signed-off-by:
-
Jintack Lim authored
commit 370a0ec1 upstream. Currently, if a vcpu thread tries to change the active state of an interrupt which is already on the same vcpu's AP list, it will loop forever. Since the VGIC mmio handler is called after a vcpu has already synced back the LR state to the struct vgic_irq, we can just let it proceed safely. Reviewed-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
Jintack Lim <jintack@cs.columbia.edu> Signed-off-by:
Christoffer Dall <cdall@linaro.org> Signed-off-by:
-
Janosch Frank authored
commit 2e4d8800 upstream. While we can technically not run huge page guests right now, we can setup a guest with huge pages. Trying to migrate it will trigger a VM_BUG_ON and, if the kernel is not configured to panic on a BUG, it will happily try to work on non-existing page table entries. With this patch, we always return "dirty" if we encounter a large page when migrating. This at least fixes the immediate problem until we have proper handling for both kind of pages. Fixes: 15f36ebd ("KVM: s390: Add proper dirty bitmap support to S390 kvm.") Signed-off-by:
Janosch Frank <frankja@linux.vnet.ibm.com> Acked-by:
Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
-
Krzysztof Kozlowski authored
commit f98c7bce upstream. If DMA is not available (even when configured in DeviceTree), the driver will fail the startup procedure thus making serial console not available. For example this causes boot failure on QEMU ARMv7 (Exynos4210, SMDKC210): [ 1.302575] OF: amba_device_add() failed (-19) for /amba/pdma@12680000 ... [ 11.435732] samsung-uart 13800000.serial: DMA request failed [ 72.963893] samsung-uart 13800000.serial: DMA request failed [ 73.143361] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000000 DMA is not necessary for serial to work, so continue with UART startup after emitting a warning. Fixes: 62c37eed ("serial: samsung: add dma reqest/release functions") Signed-off-by:
Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by:
-
Johan Hovold authored
commit 654b404f upstream. Add missing sanity check to the bulk-in completion handler to avoid an integer underflow that can be triggered by a malicious device. This avoids leaking 128 kB of memory content from after the URB transfer buffer to user space. Fixes: 8c209e67 ("USB: make actual_length in struct urb field u32") Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
-
Johan Hovold authored
commit 0b1d250a upstream. Fix a NULL-pointer dereference in the interrupt callback should a malicious device send data containing a bad port number by adding the missing sanity check. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
-
Johan Hovold authored
commit de46e566 upstream. Make sure to verify that we have the required interrupt-out endpoint for IOWarrior56 devices to avoid dereferencing a NULL-pointer in write should a malicious device lack such an endpoint. Fixes: 946b960d ("USB: add driver for iowarrior devices.") Signed-off-by:
-
Johan Hovold authored
commit b7321e81 upstream. Make sure to check for the required interrupt-in endpoint to avoid dereferencing a NULL-pointer should a malicious device lack such an endpoint. Note that a fairly recent change purported to fix this issue, but added an insufficient test on the number of endpoints only, a test which can now be removed. Fixes: 4ec0ef3a ("USB: iowarrior: fix oops with malicious USB descriptors") Fixes: 946b960d ("USB: add driver for iowarrior devices.") Signed-off-by:
-
Johan Hovold authored
commit 30572418 upstream. This driver needlessly took another reference to the tty on open, a reference which was then never released on close. This lead to not just a leak of the tty, but also a driver reference leak that prevented the driver from being unloaded after a port had once been opened. Fixes: 4a90f09b ("tty: usb-serial krefs") Signed-off-by:
-
Johan Hovold authored
commit 8c76d7cd upstream. Add missing sanity check to the bulk-in completion handler to avoid an integer underflow that could be triggered by a malicious device. This avoids leaking up to 56 bytes from after the URB transfer buffer to user space. Fixes: 1da177e4 ("Linux-2.6.12-rc2") Signed-off-by:
-
Guenter Roeck authored
commit dcc7620c upstream. Upstream commit 98d74f9c ("xhci: fix 10 second timeout on removal of PCI hotpluggable xhci controllers") fixes a problem with hot pluggable PCI xhci controllers which can result in excessive timeouts, to the point where the system reports a deadlock. The same problem is seen with hot pluggable xhci controllers using the xhci-plat driver, such as the driver used for Type-C ports on rk3399. Similar to hot-pluggable PCI controllers, the driver for this chip removes the xhci controller from the system when the Type-C cable is disconnected. The solution for PCI devices works just as well for non-PCI devices and avoids the problem. Signed-off-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
Mathias Nyman <mathias.nyman@linux.intel.com> Signed-off-by:
-
Peter Chen authored
commit f95e60a7 upstream. According to xHCI spec, HCIVERSION containing a BCD encoding of the xHCI specification revision number, 0100h corresponds to xHCI version 1.0. Change "100" as "0x100". Cc: Lu Baolu <baolu.lu@linux.intel.com> Fixes: 04abb6de ("xhci: Read and parse new xhci 1.1 capability register") Signed-off-by:
Peter Chen <peter.chen@nxp.com> Signed-off-by:
-
Roger Quadros authored
commit eb38d913 upstream. This reverts commit 4fbac520. This commit breaks g_webcam when used with uvc-gadget [1]. The user space application (e.g. uvc-gadget) is responsible for sending response to UVC class specific requests on control endpoint in uvc_send_response() in uvc_v4l2.c. The bad commit was causing a duplicate response to be sent with incorrect response data thus causing UVC probe to fail at the host and broken control transfer endpoint at the gadget. [1] - git://git.ideasonboard.org/uvc-gadget.gitAcked-by:
Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by:
Roger Quadros <rogerq@ti.com> Signed-off-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
-
Felipe Balbi authored
commit 2bfa0719 upstream. If we're dealing with SuperSpeed endpoints, we need to make sure to pass along the companion descriptor and initialize fields needed by the Gadget API. Eventually, f_fs.c should be converted to use config_ep_by_speed() like all other functions, though. Signed-off-by:
-
Jelle Martijn Kok authored
commit 85550f91 upstream. In patch 2e2aa1bcm, USB suspend and wakeup control requests are passed to SFR_OHCIICR register. If a processor does not have such a register, this hub control request will be dropped. If no such a SFR register is available, all USB suspend control requests will now be processed using ohci_hub_control() (like before patch 2e2aa1bcm.) Tested on an Atmel AT91SAM9G20 with an on-board TI TUSB2046B hub chip If the last USB device is unplugged from the USB hub, the hub goes into sleep and will not wakeup when an USB devices is inserted. Fixes: 2e2aa1bc ("usb: ohci-at91: Forcibly suspend ports while USB suspend") Signed-off-by:
Jelle Martijn Kok <jmkok@youcom.nl> Tested-by:
Wenyou Yang <wenyou.yang@atmel.com> Cc: Wenyou Yang <wenyou.yang@atmel.com> Cc: Alan Stern <stern@rowland.harvard.edu> Acked-by:
Nicolas Ferre <nicolas.ferre@microchip.com> Reviewed-by:
Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by:
-
Roger Quadros authored
commit 0913750f upstream. We need to break from all cases if we want to treat each one of them separately. Reported-by:
Gustavo A. R. Silva <garsilva@embeddedor.com> Fixes: d2728fb3 ("usb: dwc3: omap: Pass VBUS and ID events transparently") Signed-off-by:
-
Felipe Balbi authored
commit 7369090a upstream. Some gadget drivers are bad, bad boys. We notice that ADB was passing bad Burst Size which caused top bits of param0 to be overwritten which confused DWC3 when running this command. In order to avoid future issues, we're going to make sure values passed by macros are always safe for the controller. Note that ADB still needs a fix to *not* pass bad values. Reported-by:
Mohamed Abbas <mohamed.abbas@intel.com> Sugested-by:
Adam Andruszak <adam.andruszak@intel.com> Signed-off-by:
-
Peter Chen authored
commit 5bbc8526 upstream. When the user does device unbind and rebind test, the kernel will show below dump due to usb_gadget memory region is dirty after unbind. Clear usb_gadget region for every new probe. root@imx6qdlsolo:/sys/bus/platform/drivers/dummy_udc# echo dummy_udc.0 > bind [ 102.523312] kobject (eddd78b0): tried to init an initialized object, something is seriously wrong. [ 102.532447] CPU: 0 PID: 734 Comm: sh Not tainted 4.10.0-rc7-00872-g1b2b8e9 #1298 [ 102.539866] Hardware name: Freescale i.MX6 SoloX (Device Tree) [ 102.545717] Backtrace: [ 102.548225] [<c010d090>] (dump_backtrace) from [<c010d338>] (show_stack+0x18/0x1c) [ 102.555822] r7:ede34000 r6:60010013 r5:00000000 r4:c0f29418 [ 102.561512] [<c010d320>] (show_stack) from [<c040c2a4>] (dump_stack+0xb4/0xe8) [ 102.568764] [<c040c1f0>] (dump_stack) from [<c040e6d4>] (kobject_init+0x80/0x9c) [ 102.576187] r10:0000001f r9:eddd7000 r8:eeaf8c10 r7:eddd78a8 r6:c177891c r5:c0f3b060 [ 102.584036] r4:eddd78b0 r3:00000000 [ 102.587641] [<c040e654>] (kobject_init) from [<c05359a4>] (device_initialize+0x28/0xf8) [ 102.595665] r5:eebc4800 r4:eddd78a8 [ 102.599268] [<c053597c>] (device_initialize) from [<c05382ac>] (device_register+0x14/0x20) [ 102.607556] r7:eddd78a8 r6:00000000 r5:eebc4800 r4:eddd78a8 [ 102.613256] [<c0538298>] (device_register) from [<c0668ef4>] (usb_add_gadget_udc_release+0x8c/0x1ec) [ 102.622410] r5:eebc4800 r4:eddd7860 [ 102.626015] [<c0668e68>] (usb_add_gadget_udc_release) from [<c0669068>] (usb_add_gadget_udc+0x14/0x18) [ 102.635351] r10:0000001f r9:eddd7000 r8:eddd788c r7:bf003770 r6:eddd77f8 r5:eddd7818 [ 102.643198] r4:eddd785c r3:eddd7b24 [ 102.646834] [<c0669054>] (usb_add_gadget_udc) from [<bf003428>] (dummy_udc_probe+0x170/0x1c4 [dummy_hcd]) [ 102.656458] [<bf0032b8>] (dummy_udc_probe [dummy_hcd]) from [<c053d114>] (platform_drv_probe+0x54/0xb8) [ 102.665881] r10:00000008 r9:c1778960 r8:bf004128 r7:fffffdfb r6:bf004128 r5:eeaf8c10 [ 102.673727] r4:eeaf8c10 [ 102.676293] [<c053d0c0>] (platform_drv_probe) from [<c053b160>] (driver_probe_device+0x264/0x474) [ 102.685186] r7:00000000 r6:00000000 r5:c1778960 r4:eeaf8c10 [ 102.690876] [<c053aefc>] (driver_probe_device) from [<c05397c4>] (bind_store+0xb8/0x14c) [ 102.698994] r10:eeb3bb4c r9:ede34000 r8:0000000c r7:eeaf8c44 r6:bf004128 r5:c0f3b668 [ 102.706840] r4:eeaf8c10 [ 102.709402] [<c053970c>] (bind_store) from [<c0538ca8>] (drv_attr_store+0x28/0x34) [ 102.716998] r9:ede34000 r8:00000000 r7:ee3863c0 r6:ee3863c0 r5:c0538c80 r4:c053970c [ 102.724776] [<c0538c80>] (drv_attr_store) from [<c029c930>] (sysfs_kf_write+0x50/0x54) [ 102.732711] r5:c0538c80 r4:0000000c [ 102.736313] [<c029c8e0>] (sysfs_kf_write) from [<c029be84>] (kernfs_fop_write+0x100/0x214) [ 102.744599] r7:ee3863c0 r6:eeb3bb40 r5:00000000 r4:00000000 [ 102.750287] [<c029bd84>] (kernfs_fop_write) from [<c0222dd8>] (__vfs_write+0x34/0x120) [ 102.758231] r10:00000000 r9:ede34000 r8:c0108bc4 r7:0000000c r6:ede35f80 r5:c029bd84 [ 102.766077] r4:ee223780 [ 102.768638] [<c0222da4>] (__vfs_write) from [<c0224678>] (vfs_write+0xa8/0x170) [ 102.775974] r9:ede34000 r8:c0108bc4 r7:ede35f80 r6:01861cb0 r5:ee223780 r4:0000000c [ 102.783743] [<c02245d0>] (vfs_write) from [<c0225498>] (SyS_write+0x4c/0xa8) [ 102.790818] r9:ede34000 r8:c0108bc4 r7:0000000c r6:01861cb0 r5:ee223780 r4:ee223780 [ 102.798595] [<c022544c>] (SyS_write) from [<c0108a20>] (ret_fast_syscall+0x0/0x1c) [ 102.806188] r7:00000004 r6:b6e83d58 r5:01861cb0 r4:0000000c Fixes: 90fccb52 ("usb: gadget: Gadget directory cleanup - group UDC drivers") Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
Xiaolong Ye <xiaolong.ye@intel.com> Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Signed-off-by:
-
Ethan Zhao authored
commit 0d5370d1 upstream. QLogic ISP2722-based 16/32Gb Fibre Channel to PCIe Adapter has the VPD access issue too, while read the common pci-sysfs access interface shown as /sys/devices/pci0000:00/0000:00:03.2/0000:0b:00.0/vpd with simple 'cat' could cause system hang and panic: Kernel panic - not syncing: An NMI occurred. Depending on your system the reason for the NMI is logged in any one of the following resources: 1. Integrated Management Log (IML) 2. OA Syslog 3. OA Forward Progress Log 4. iLO Event Log CPU: 0 PID: 15070 Comm: udevadm Not tainted 4.1.12 Hardware name: HP ProLiant DL380 Gen9/ProLiant DL380 Gen9, BIOS P89 12/27/2015 0000000000000086 000000007f0cdf51 ffff880c4fa05d58 ffffffff817193de ffffffffa00b42d8 0000000000000075 ffff880c4fa05dd8 ffffffff81714072 0000000000000008 ffff880c4fa05de8 ffff880c4fa05d88 000000007f0cdf51 Call Trace: <NMI> [<ffffffff817193de>] dump_stack+0x63/0x81 [<ffffffff81714072>] panic+0xd0/0x20e [<ffffffffa00b390d>] hpwdt_pretimeout+0xdd/0xe0 [hpwdt] [<ffffffff81021fc9>] ? sched_clock+0x9/0x10 [<ffffffff8101c101>] nmi_handle+0x91/0x170 [<ffffffff8101c10c>] ? nmi_handle+0x9c/0x170 [<ffffffff8101c5fe>] io_check_error+0x1e/0xa0 [<ffffffff8101c719>] default_do_nmi+0x99/0x140 [<ffffffff8101c8b4>] do_nmi+0xf4/0x170 [<ffffffff817232c5>] end_repeat_nmi+0x1a/0x1e [<ffffffff815d724b>] ? pci_conf1_read+0xeb/0x120 [<ffffffff815d724b>] ? pci_conf1_read+0xeb/0x120 [<ffffffff815d724b>] ? pci_conf1_read+0xeb/0x120 <<EOE>> [<ffffffff815db4b3>] raw_pci_read+0x23/0x40 [<ffffffff815db4fc>] pci_read+0x2c/0x30 [<ffffffff8136f612>] pci_user_read_config_word+0x72/0x110 [<ffffffff8136f746>] pci_vpd_pci22_wait+0x96/0x130 [<ffffffff8136ff9b>] pci_vpd_pci22_read+0xdb/0x1a0 [<ffffffff8136ea30>] pci_read_vpd+0x20/0x30 [<ffffffff8137d590>] read_vpd_attr+0x30/0x40 [<ffffffff8128e037>] sysfs_kf_bin_read+0x47/0x70 [<ffffffff8128d24e>] kernfs_fop_read+0xae/0x180 [<ffffffff8120dd97>] __vfs_read+0x37/0x100 [<ffffffff812ba7e4>] ? security_file_permission+0x84/0xa0 [<ffffffff8120e366>] ? rw_verify_area+0x56/0xe0 [<ffffffff8120e476>] vfs_read+0x86/0x140 [<ffffffff8120f3f5>] SyS_read+0x55/0xd0 [<ffffffff81720f2e>] system_call_fastpath+0x12/0x71 Shutting down cpus with NMI Kernel Offset: disabled drm_kms_helper: panic occurred, switching back to text console So blacklist the access to its VPD. Signed-off-by:
Ethan Zhao <ethan.zhao@oracle.com> Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> Signed-off-by:
-
Balbir Singh authored
commit a69e2fb7 upstream. The CPPR (Current Processor Priority Register) of a XICS interrupt presentation controller contains a value N, such that only interrupts with a priority "more favoured" than N will be received by the CPU, where "more favoured" means "less than". So if the CPPR has the value 5 then only interrupts with a priority of 0-4 inclusive will be received. In theory the CPPR can support a value of 0 to 255 inclusive. In practice Linux only uses values of 0, 4, 5 and 0xff. Setting the CPPR to 0 rejects all interrupts, setting it to 0xff allows all interrupts. The values 4 and 5 are used to differentiate IPIs from external interrupts. Setting the CPPR to 5 allows IPIs to be received but not external interrupts. The CPPR emulation in the OPAL XICS implementation only directly supports priorities 0 and 0xff. All other priorities are considered equivalent, and mapped to a single priority value internally. This means when using icp-opal we can not allow IPIs but not externals. This breaks Linux's use of priority values when a CPU is hot unplugged. After migrating IRQs away from the CPU that is being offlined, we set the priority to 5, meaning we still want the offline CPU to receive IPIs. But the effect of the OPAL XICS emulation's use of a single priority value is that all interrupts are rejected by the CPU. With the CPU offline, and not receiving IPIs, we may not be able to wake it up to bring it back online. The first part of the fix is in icp_opal_set_cpu_priority(). CPPR values of 0 to 4 inclusive will correctly cause all interrupts to be rejected, so we pass those CPPR values through to OPAL. However if we are called with a CPPR of 5 or greater, the caller is expecting to be able to allow IPIs but not external interrupts. We know this doesn't work, so instead of rejecting all interrupts we choose the opposite which is to allow all interrupts. This is still not correct behaviour, but we know for the only existing caller (xics_migrate_irqs_away()), that it is the better option. The other part of the fix is in xics_migrate_irqs_away(). Instead of setting priority (CPPR) to 0, and then back to 5 before migrating IRQs, we migrate the IRQs before setting the priority back to 5. This should have no effect on an ICP backend with a working set_priority(), and on icp-opal it means we will keep all interrupts blocked until after we've finished doing the IRQ migration. Additionally we wait for 5ms after doing the migration to make sure there are no IRQs in flight. Fixes: d7436188 ("powerpc/xics: Add ICP OPAL backend") Suggested-by:
Michael Ellerman <mpe@ellerman.id.au> Reported-by:
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Tested-by:
Balbir Singh <bsingharora@gmail.com> [mpe: Rewrote comments and change log, change delay to 5ms] Signed-off-by:
-
Laurentiu Tudor authored
commit 3fb66a70 upstream. On 32-bit book-e machines, hugepd_ok() no longer takes into account null hugepd values, causing this crash at boot: Unable to handle kernel paging request for data at address 0x80000000 ... NIP [c0018378] follow_huge_addr+0x38/0xf0 LR [c001836c] follow_huge_addr+0x2c/0xf0 Call Trace: follow_huge_addr+0x2c/0xf0 (unreliable) follow_page_mask+0x40/0x3e0 __get_user_pages+0xc8/0x450 get_user_pages_remote+0x8c/0x250 copy_strings+0x110/0x390 copy_strings_kernel+0x2c/0x50 do_execveat_common+0x478/0x630 do_execve+0x2c/0x40 try_to_run_init_process+0x18/0x60 kernel_init+0xbc/0x110 ret_from_kernel_thread+0x5c/0x64 This impacts all nxp (ex-freescale) 32-bit booke platforms. This was caused by the change of hugepd_t.pd from signed to unsigned, and the update to the nohash version of hugepd_ok(). Previously hugepd_ok() could exclude all non-huge and NULL pgds using > 0, whereas now we need to explicitly check that the value is not zero and also that PD_HUGE is *clear*. This isn't protected by the pgd_none() check in __find_linux_pte_or_hugepte() because on 32-bit we use pgtable-nopud.h, which causes the pgd_none() check to be always false. Fixes: 20717e1f ("powerpc/mm: Fix little-endian 4K hugetlb") Reported-by:
Madalin-Cristian Bucur <madalin.bucur@nxp.com> Signed-off-by:
Laurentiu Tudor <laurentiu.tudor@nxp.com> [mpe: Flesh out change log details.] Signed-off-by:
-
Ravi Bangoria authored
commit e148bd17 upstream. emulate_step() uses a number of underlying kernel functions that were initially not enabled for LE. This has been rectified since. So, fix emulate_step() for LE for the corresponding instructions. Reported-by:
Anton Blanchard <anton@samba.org> Signed-off-by:
Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Signed-off-by:
-
Qi Hou authored
commit 2e1e4949 upstream. Refcount of of_node is increased with of_node_get() in i2c_mux_add_adapter(). It must be decreased with of_node_put() in i2c_mux_del_adapters(). Signed-off-by:
Qi Hou <qi.hou@windriver.com> Reviewed-by:
Zhang Xiao <xiao.zhang@windriver.com> Signed-off-by:
Peter Rosin <peda@axentia.se> Signed-off-by:
-
Jonathan McDowell authored
commit 606142af upstream. On Kernel 4.9, WARNINGs about doing DMA on stack are hit at the dw2102 driver: one in su3000_power_ctrl() and the other in tt_s2_4600_frontend_attach(). Both were due to the use of buffers on the stack as parameters to dvb_usb_generic_rw() and the resulting attempt to do DMA with them. The device was non-functional as a result. So, switch this driver over to use a buffer within the device state structure, as has been done with other DVB-USB drivers. Tested with TechnoTrend TT-connect S2-4600. [mchehab@osg.samsung.com: fixed a warning at su3000_i2c_transfer() that state var were dereferenced before check 'd'] Signed-off-by:
Jonathan McDowell <noodles@earth.li> Signed-off-by:
-
Ard Biesheuvel authored
commit d1eb9814 upstream. On ARM and arm64, we use a dedicated mm_struct to map the UEFI Runtime Services regions, which allows us to map those regions on demand, and in a way that is guaranteed to be compatible with incoming kernels across kexec. As it turns out, we don't fully initialize the mm_struct in the same way as process mm_structs are initialized on fork(), which results in the following crash on ARM if CONFIG_CPUMASK_OFFSTACK=y is enabled: ... EFI Variables Facility v0.08 2004-May-17 Unable to handle kernel NULL pointer dereference at virtual address 00000000 [...] Process swapper/0 (pid: 1) ... __memzero() check_and_switch_context() virt_efi_get_next_variable() efivar_init() efivars_sysfs_init() do_one_initcall() ... This is due to a missing call to mm_init_cpumask(), so add it. Signed-off-by:
Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-efi@vger.kernel.org Link: http://lkml.kernel.org/r/1488395154-29786-1-git-send-email-ard.biesheuvel@linaro.orgSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
-
