- 21 Jul, 2017 10 commits
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Helge Deller authored
commit 24746231 upstream. When a process runs out of stack the parisc kernel wrongly faults with SIGBUS instead of the expected SIGSEGV signal. This example shows how the kernel faults: do_page_fault() command='a.out' type=15 address=0xfaac2000 in libc-2.24.so[f8308000+16c000] trap #15: Data TLB miss fault, vm_start = 0xfa2c2000, vm_end = 0xfaac2000 The vma->vm_end value is the first address which does not belong to the vma, so adjust the check to include vma->vm_end to the range for which to send the SIGSEGV signal. This patch unbreaks building the debian libsigsegv package. Signed-off-by:
Helge Deller <deller@gmx.de> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Suzuki K Poulose authored
commit 866d7c1b upstream. The GICv3 driver doesn't check if the target CPU for gic_set_affinity is valid before going ahead and making the changes. This triggers the following splat with KASAN: [ 141.189434] BUG: KASAN: global-out-of-bounds in gic_set_affinity+0x8c/0x140 [ 141.189704] Read of size 8 at addr ffff200009741d20 by task swapper/1/0 [ 141.189958] [ 141.190158] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.12.0-rc7 [ 141.190458] Hardware name: Foundation-v8A (DT) [ 141.190658] Call trace: [ 141.190908] [<ffff200008089d70>] dump_backtrace+0x0/0x328 [ 141.191224] [<ffff20000808a1b4>] show_stack+0x14/0x20 [ 141.191507] [<ffff200008504c3c>] dump_stack+0xa4/0xc8 [ 141.191858] [<ffff20000826c19c>] print_address_description+0x13c/0x250 [ 141.192219] [<ffff20000826c5c8>] kasan_report+0x210/0x300 [ 141.192547] [<ffff20000826ad54>] __asan_load8+0x84/0x98 [ 141.192874] [<ffff20000854eeec>] gic_set_affinity+0x8c/0x140 [ 141.193158] [<ffff200008148b14>] irq_do_set_affinity+0x54/0xb8 [ 141.193473] [<ffff200008148d2c>] irq_set_affinity_locked+0x64/0xf0 [ 141.193828] [<ffff200008148e00>] __irq_set_affinity+0x48/0x78 [ 141.194158] [<ffff200008bc48a4>] arm_perf_starting_cpu+0x104/0x150 [ 141.194513] [<ffff2000080d73bc>] cpuhp_invoke_callback+0x17c/0x1f8 [ 141.194783] [<ffff2000080d94ec>] notify_cpu_starting+0x8c/0xb8 [ 141.195130] [<ffff2000080911ec>] secondary_start_kernel+0x15c/0x200 [ 141.195390] [<0000000080db81b4>] 0x80db81b4 [ 141.195603] [ 141.195685] The buggy address belongs to the variable: [ 141.196012] __cpu_logical_map+0x200/0x220 [ 141.196176] [ 141.196315] Memory state around the buggy address: [ 141.196586] ffff200009741c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.196913] ffff200009741c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.197158] >ffff200009741d00: 00 00 00 00 fa fa fa fa 00 00 00 00 00 00 00 00 [ 141.197487] ^ [ 141.197758] ffff200009741d80: 00 00 00 00 00 00 00 00 fa fa fa fa 00 00 00 00 [ 141.198060] ffff200009741e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 141.198358] ================================================================== [ 141.198609] Disabling lock debugging due to kernel taint [ 141.198961] CPU1: Booted secondary processor [410fd051] This patch adds the check to make sure the cpu is valid. Fixes: commit 021f6537 ("irqchip: gic-v3: Initial support for GICv3") Signed-off-by:
Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by:
Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:
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Srinivas Dasari authored
commit 9361df14 upstream. nla policy checks for only maximum length of the attribute data when the attribute type is NLA_BINARY. If userspace sends less data than specified, the wireless drivers may access illegal memory. When type is NLA_UNSPEC, nla policy check ensures that userspace sends minimum specified length number of bytes. Remove type assignment to NLA_BINARY from nla_policy of NL80211_ATTR_PMKID to make this NLA_UNSPEC and to make sure minimum WLAN_PMKID_LEN bytes are received from userspace with NL80211_ATTR_PMKID. Fixes: 67fbb16b ("nl80211: PMKSA caching support") Signed-off-by:
Srinivas Dasari <dasaris@qti.qualcomm.com> Signed-off-by:
Jouni Malinen <jouni@qca.qualcomm.com> Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
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Srinivas Dasari authored
commit d7f13f74 upstream. validate_scan_freqs() retrieves frequencies from attributes nested in the attribute NL80211_ATTR_SCAN_FREQUENCIES with nla_get_u32(), which reads 4 bytes from each attribute without validating the size of data received. Attributes nested in NL80211_ATTR_SCAN_FREQUENCIES don't have an nla policy. Validate size of each attribute before parsing to avoid potential buffer overread. Fixes: 2a519311 ("cfg80211/nl80211: scanning (and mac80211 update to use it)") Signed-off-by:
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Srinivas Dasari authored
commit 8feb69c7 upstream. Buffer overread may happen as nl80211_set_station() reads 4 bytes from the attribute NL80211_ATTR_LOCAL_MESH_POWER_MODE without validating the size of data received when userspace sends less than 4 bytes of data with NL80211_ATTR_LOCAL_MESH_POWER_MODE. Define nla_policy for NL80211_ATTR_LOCAL_MESH_POWER_MODE to avoid the buffer overread. Fixes: 3b1c5a53 ("{cfg,nl}80211: mesh power mode primitives and userspace access") Signed-off-by:
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Arend van Spriel authored
commit 8f44c9a4 upstream. The lower level nl80211 code in cfg80211 ensures that "len" is between 25 and NL80211_ATTR_FRAME (2304). We subtract DOT11_MGMT_HDR_LEN (24) from "len" so thats's max of 2280. However, the action_frame->data[] buffer is only BRCMF_FIL_ACTION_FRAME_SIZE (1800) bytes long so this memcpy() can overflow. memcpy(action_frame->data, &buf[DOT11_MGMT_HDR_LEN], le16_to_cpu(action_frame->len)); Fixes: 18e2f61d ("brcmfmac: P2P action frame tx.") Reported-by:
"freenerguo(郭大兴)" <freenerguo@tencent.com> Signed-off-by:
Arend van Spriel <arend.vanspriel@broadcom.com> Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Sabrina Dubroca authored
commit ec8add2a upstream. Currently, when the link for $DEV is down, this command succeeds but the address is removed immediately by DAD (1): ip addr add 1111::12/64 dev $DEV valid_lft 3600 preferred_lft 1800 In the same situation, this will succeed and not remove the address (2): ip addr add 1111::12/64 dev $DEV ip addr change 1111::12/64 dev $DEV valid_lft 3600 preferred_lft 1800 The comment in addrconf_dad_begin() when !IF_READY makes it look like this is the intended behavior, but doesn't explain why: * If the device is not ready: * - keep it tentative if it is a permanent address. * - otherwise, kill it. We clearly cannot prevent userspace from doing (2), but we can make (1) work consistently with (2). addrconf_dad_stop() is only called in two cases: if DAD failed, or to skip DAD when the link is down. In that second case, the fix is to avoid deleting the address, like we already do for permanent addresses. Fixes: 3c21edbd ("[IPV6]: Defer IPv6 device initialization until the link becomes ready.") Signed-off-by:
Sabrina Dubroca <sd@queasysnail.net> Signed-off-by:
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Eric Dumazet authored
commit 6f64ec74 upstream. Similar to the fix provided by Dominik Heidler in commit 9b3dc0a1 ("l2tp: cast l2tp traffic counter to unsigned") we need to take care of 32bit kernels in dev_get_stats(). When using atomic_long_read(), we add a 'long' to u64 and might misinterpret high order bit, unless we cast to unsigned. Fixes: caf586e5 ("net: add a core netdev->rx_dropped counter") Fixes: 015f0688 ("net: net: add a core netdev->tx_dropped counter") Fixes: 6e7333d3 ("net: add rx_nohandler stat counter") Signed-off-by:
Eric Dumazet <edumazet@google.com> Cc: Jarod Wilson <jarod@redhat.com> Signed-off-by:
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WANG Cong authored
commit d747a7a5 upstream. We have to reset the sk->sk_rx_dst when we disconnect a TCP connection, because otherwise when we re-connect it this dst reference is simply overridden in tcp_finish_connect(). This fixes a dst leak which leads to a loopback dev refcnt leak. It is a long-standing bug, Kevin reported a very similar (if not same) bug before. Thanks to Andrei for providing such a reliable reproducer which greatly narrows down the problem. Fixes: 41063e9d ("ipv4: Early TCP socket demux.") Reported-by:
Andrei Vagin <avagin@gmail.com> Reported-by:
Kevin Xu <kaiwen.xu@hulu.com> Signed-off-by:
Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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WANG Cong authored
commit 60abc0be upstream. The per netns loopback_dev->ip6_ptr is unregistered and set to NULL when its mtu is set to smaller than IPV6_MIN_MTU, this leads to that we could set rt->rt6i_idev NULL after a rt6_uncached_list_flush_dev() and then crash after another call. In this case we should just bring its inet6_dev down, rather than unregistering it, at least prior to commit 176c39af ("netns: fix addrconf_ifdown kernel panic") we always override the case for loopback. Thanks a lot to Andrey for finding a reliable reproducer. Fixes: 176c39af ("netns: fix addrconf_ifdown kernel panic") Reported-by:
Andrey Konovalov <andreyknvl@google.com> Cc: Andrey Konovalov <andreyknvl@google.com> Cc: Daniel Lezcano <dlezcano@fr.ibm.com> Cc: David Ahern <dsahern@gmail.com> Signed-off-by:
David Ahern <dsahern@gmail.com> Tested-by:
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- 15 Jul, 2017 22 commits
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Greg Kroah-Hartman authored
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Maciej S. Szmigiero authored
commit 5a91206f upstream. When saa7134 module driving a Medion 7134 card is reloaded reads of this card EEPROM (required for automatic detection of tuner model) will be corrupted due to I2C gate in DVB-T demod being left closed. This sometimes also happens on first saa7134 module load after a warm reboot. Fix this by opening this I2C gate before doing EEPROM read during i2c initialization. Signed-off-by:
Maciej S. Szmigiero <mail@maciej.szmigiero.name> Signed-off-by:
Mauro Carvalho Chehab <mchehab@s-opensource.com> Cc: Oliver Hartkopp <socketcan@hartkopp.net> Signed-off-by:
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Ian Abbott authored
commit a9332e9a upstream. There is a clean-up bug in the core comedi module initialization functions, `comedi_init()`. If the `comedi_num_legacy_minors` module parameter is non-zero (and valid), it creates that many "legacy" devices and registers them in SysFS. A failure causes the function to clean up and return an error. Unfortunately, it fails to destroy the "comedi" class that was created earlier. Fix it by adding a call to `class_destroy(comedi_class)` at the appropriate place in the clean-up sequence. Signed-off-by:
Ian Abbott <abbotti@mev.co.uk> Signed-off-by:
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Malcolm Priestley authored
commit dc32190f upstream. The key table is not intialized correctly without this call. Signed-off-by:
Malcolm Priestley <tvboxspy@gmail.com> Signed-off-by:
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Jason Yan authored
commit 3fb632e4 upstream. The sb->super_offset should be big-endian, but the rdev->sb_start is in host byte order, so fix this by adding cpu_to_le64. Signed-off-by:
Jason Yan <yanaijie@huawei.com> Signed-off-by:
Shaohua Li <shli@fb.com> Signed-off-by:
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Cong Wang authored
commit f991af3d upstream. The retry logic for netlink_attachskb() inside sys_mq_notify() is nasty and vulnerable: 1) The sock refcnt is already released when retry is needed 2) The fd is controllable by user-space because we already release the file refcnt so we when retry but the fd has been just closed by user-space during this small window, we end up calling netlink_detachskb() on the error path which releases the sock again, later when the user-space closes this socket a use-after-free could be triggered. Setting 'sock' to NULL here should be sufficient to fix it. Reported-by:
GeneBlue <geneblue.mail@gmail.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Dan Carpenter authored
commit 57cb17e7 upstream. This function has two callers and neither are able to handle a NULL return. Really, -EINVAL is the correct thing return here anyway. This fixes some static checker warnings like: security/keys/encrypted-keys/encrypted.c:709 encrypted_key_decrypt() error: uninitialized symbol 'master_key'. Fixes: 7e70cb49 ("keys: add new key-type encrypted") Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Acked-by:
Mimi Zohar <zohar@linux.vnet.ibm.com> Signed-off-by:
James Morris <james.l.morris@oracle.com> Signed-off-by:
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Bjørn Mork authored
commit 996fab55 upstream. A new Sierra Wireless EM7305 device ID used in a Toshiba laptop. Reported-by:
Petr Kloc <petr_kloc@yahoo.com> Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
Johan Hovold <johan@kernel.org> Signed-off-by:
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Johan Hovold authored
commit 8fb060da upstream. Add two Longcheer device-id entries which specifically enables a Telewell TW-3G HSPA+ branded modem (0x9801). Reported-by:
Teemu Likonen <tlikonen@iki.fi> Reported-by:
Lars Melin <larsm17@gmail.com> Tested-by:
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Geert Uytterhoeven authored
commit 3091ae77 upstream. Update the sh_pfc_soc_info pointer after calling the SoC-specific initialization function, as it may have been updated to e.g. handle different SoC revisions. This makes sure the correct subdriver name is printed later. Fixes: 0c151062 ("sh-pfc: Add support for SoC-specific initialization") Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by:
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Uwe Kleine-König authored
commit da6c2add upstream. To set the mux mode of a pin two bits must be set. Up to now this is implemented using the following idiom: writel(mask, reg + CLR); writel(value, reg + SET); . This however results in the mux mode being 0 between the two writes. On my machine there is an IC's reset pin connected to LCD_D20. The bootloader configures this pin as GPIO output-high (i.e. not holding the IC in reset). When Linux reconfigures the pin to GPIO the short time LCD_D20 is muxed as LCD_D20 instead of GPIO_1_20 is enough to confuse the connected IC. The same problem is present for the pin's drive strength setting which is reset to low drive strength before using the right value. So instead of relying on the hardware to modify the register setting using two writes implement the bit toggling using read-modify-write. Fixes: 17723111 ("pinctrl: add pinctrl-mxs support") Signed-off-by:
Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by:
Shawn Guo <shawnguo@kernel.org> Signed-off-by:
Linus Walleij <linus.walleij@linaro.org> Signed-off-by:
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Benjamin Herrenschmidt authored
commit 7cf916bd upstream. The current definition is wrong. This breaks my upcoming Aspeed virtual hub driver. Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by:
Alan Stern <stern@rowland.harvard.edu> Signed-off-by:
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Michael Grzeschik authored
commit b3b51417 upstream. The usbip stack dynamically allocates the transfer_buffer and setup_packet of each urb that got generated by the tcp to usb stub code. As these pointers are always used only once we will set them to NULL after use. This is done likewise to the free_urb code in vudc_dev.c. This patch fixes double kfree situations where the usbip remote side added the URB_FREE_BUFFER. Signed-off-by:
Michael Grzeschik <m.grzeschik@pengutronix.de> Acked-by:
Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by:
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Devin Heitmueller authored
commit 6836796d upstream. The USB core and sysfs will attempt to enumerate certain parameters which are unsupported by the au0828 - causing inconsistent behavior and sometimes causing the chip to reset. Avoid making these calls. This problem manifested as intermittent cases where the au8522 would be reset on analog video startup, in particular when starting up ALSA audio streaming in parallel - the sysfs entries created by snd-usb-audio on streaming startup would result in unsupported control messages being sent during tuning which would put the chip into an unknown state. Signed-off-by:
Devin Heitmueller <dheitmueller@kernellabs.com> Signed-off-by:
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Jeremie Rapin authored
commit fd90f73a upstream. Added the USB serial device ID for the CEL ZigBee EM3588 radio stick. Signed-off-by:
Jeremie Rapin <rapinj@gmail.com> Acked-by:
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Felipe Balbi authored
commit 04fb365c upstream. %p will leak kernel pointers, so let's not expose the information on dmesg and instead use %pK. %pK will only show the actual addresses if explicitly enabled under /proc/sys/kernel/kptr_restrict. Acked-by:
Felipe Balbi <felipe.balbi@linux.intel.com> Signed-off-by:
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Sabrina Dubroca authored
commit 9e52b325 upstream. Always try to parse an address, since kstrtoul() will safely fail when given a symbol as input. If that fails (which will be the case for a symbol), try to parse a symbol instead. This allows creating a probe such as: p:probe/vlan_gro_receive 8021q:vlan_gro_receive+0 Which is necessary for this command to work: perf probe -m 8021q -a vlan_gro_receive Link: http://lkml.kernel.org/r/fd72d666f45b114e2c5b9cf7e27b91de1ec966f1.1498122881.git.sd@queasysnail.net Fixes: 413d37d1 ("tracing: Add kprobe-based event tracer") Acked-by:
Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by:
Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by:
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Jonas Gorski authored
commit db1319e1 upstream. Commit d445913c ("usb: ehci-orion: add optional PHY support") added support for optional phys, but devm_phy_optional_get returns -ENOSYS if GENERIC_PHY is not enabled. This causes probe failures, even when there are no phys specified: [ 1.443365] orion-ehci f1058000.usb: init f1058000.usb fail, -38 [ 1.449403] orion-ehci: probe of f1058000.usb failed with error -38 Similar to dwc3, treat -ENOSYS as no phy. Fixes: d445913c ("usb: ehci-orion: add optional PHY support") Signed-off-by:
Jonas Gorski <jogo@openwrt.org> Acked-by:
Amit Pundir <amit.pundir@linaro.org> Signed-off-by:
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Rafał Miłecki authored
commit b4dfd8e9 upstream. This fixes Ethernet on D-Link DIR-885L with BCM47094 SoC. Felix reported similar fix was needed for his BCM4709 device (Buffalo WXR-1900DHP?). I tested this for regressions on BCM4706, BCM4708A0 and BCM47081A0. Cc: Felix Fietkau <nbd@openwrt.org> Signed-off-by:
Rafał Miłecki <zajec5@gmail.com> Signed-off-by:
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Rafał Miłecki authored
commit 21697336 upstream. On Northstar (Broadcom's ARM architecture) we need to manually enable all cores. Code for that is already in place, but the condition for it was wrong. Signed-off-by:
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Yousong Zhou authored
commit 71a0a724 upstream. Some GCC versions (e.g. 4.8.3) can incorrectly inline a function with MIPS32 instructions into another function with MIPS16 code [1], causing the assembler to genereate incorrect binary code or fail right away complaining about unrecognized opcode. In the case of __arch_swab{16,32}, when inlined by the compiler with flags `-mips32r2 -mips16 -Os', the assembler can fail with the following error. {standard input}:79: Error: unrecognized opcode `wsbh $2,$2' For performance concerns and to workaround the issue already existing in older compilers, just ignore these 2 functions when compiling with mips16 enabled. [1] Inlining nomips16 function into mips16 function can result in undefined builtins, https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55777Signed-off-by:
Yousong Zhou <yszhou4tech@gmail.com> Cc: Maciej W. Rozycki <macro@linux-mips.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/11241/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org> Signed-off-by:
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Adrian Salido authored
commit 62655397 upstream. The driver_override implementation is susceptible to race condition when different threads are reading vs storing a different driver override. Add locking to avoid race condition. Fixes: 3d713e0e ("driver core: platform: add device binding path 'driver_override'") Cc: stable@vger.kernel.org Signed-off-by:
Adrian Salido <salidoa@google.com> Signed-off-by:
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- 05 Jul, 2017 8 commits
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Greg Kroah-Hartman authored
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Wanpeng Li authored
commit d4912215 upstream. WARNING: CPU: 3 PID: 2840 at arch/x86/kvm/vmx.c:10966 nested_vmx_vmexit+0xdcd/0xde0 [kvm_intel] CPU: 3 PID: 2840 Comm: qemu-system-x86 Tainted: G OE 4.12.0-rc3+ #23 RIP: 0010:nested_vmx_vmexit+0xdcd/0xde0 [kvm_intel] Call Trace: ? kvm_check_async_pf_completion+0xef/0x120 [kvm] ? rcu_read_lock_sched_held+0x79/0x80 vmx_queue_exception+0x104/0x160 [kvm_intel] ? vmx_queue_exception+0x104/0x160 [kvm_intel] kvm_arch_vcpu_ioctl_run+0x1171/0x1ce0 [kvm] ? kvm_arch_vcpu_load+0x47/0x240 [kvm] ? kvm_arch_vcpu_load+0x62/0x240 [kvm] kvm_vcpu_ioctl+0x384/0x7b0 [kvm] ? kvm_vcpu_ioctl+0x384/0x7b0 [kvm] ? __fget+0xf3/0x210 do_vfs_ioctl+0xa4/0x700 ? __fget+0x114/0x210 SyS_ioctl+0x79/0x90 do_syscall_64+0x81/0x220 entry_SYSCALL64_slow_path+0x25/0x25 This is triggered occasionally by running both win7 and win2016 in L2, in addition, EPT is disabled on both L1 and L2. It can't be reproduced easily. Commit 0b6ac343 (KVM: nVMX: Correct handling of exception injection) mentioned that "KVM wants to inject page-faults which it got to the guest. This function assumes it is called with the exit reason in vmcs02 being a #PF exception". Commit e011c663 (KVM: nVMX: Check all exceptions for intercept during delivery to L2) allows to check all exceptions for intercept during delivery to L2. However, there is no guarantee the exit reason is exception currently, when there is an external interrupt occurred on host, maybe a time interrupt for host which should not be injected to guest, and somewhere queues an exception, then the function nested_vmx_check_exception() will be called and the vmexit emulation codes will try to emulate the "Acknowledge interrupt on exit" behavior, the warning is triggered. Reusing the exit reason from the L2->L0 vmexit is wrong in this case, the reason must always be EXCEPTION_NMI when injecting an exception into L1 as a nested vmexit. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
Wanpeng Li <wanpeng.li@hotmail.com> Fixes: e011c663 ("KVM: nVMX: Check all exceptions for intercept during delivery to L2") Signed-off-by:
Radim Krčmář <rkrcmar@redhat.com> Signed-off-by:
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Radim Krčmář authored
commit f0367ee1 upstream. Static checker noticed that base3 could be used uninitialized if the segment was not present (useable). Random stack values probably would not pass VMCS entry checks. Reported-by:
Paolo Bonzini <pbonzini@redhat.com> Reviewed-by:
David Hildenbrand <david@redhat.com> Signed-off-by:
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Dan Carpenter authored
commit a69261e4 upstream. The "goto err_armclk;" error path already does a clk_put(s3c_freq->hclk); so this is a double free. Fixes: 34ee5507 ([CPUFREQ] Add S3C2416/S3C2450 cpufreq driver) Signed-off-by:
Krzysztof Kozlowski <krzk@kernel.org> Acked-by:
Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by:
Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by:
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Pan Bian authored
commit 73dbd4a4 upstream. In function amd_iommu_bind_pasid(), the control flow jumps to label out_free when pasid_state->mm and mm is NULL. And mmput(mm) is called. In function mmput(mm), mm is referenced without validation. This will result in a NULL dereference bug. This patch fixes the bug. Signed-off-by:
Pan Bian <bianpan2016@163.com> Fixes: f0aac63b ('iommu/amd: Don't hold a reference to mm_struct') Signed-off-by:
Joerg Roedel <jroedel@suse.de> Signed-off-by:
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David Dillow authored
commit f7116e11 upstream. dma_pte_free_level() recurses down the IOMMU page tables and frees directory pages that are entirely contained in the given PFN range. Unfortunately, it incorrectly calculates the starting address covered by the PTE under consideration, which can lead to it clearing an entry that is still in use. This occurs if we have a scatterlist with an entry that has a length greater than 1026 MB and is aligned to 2 MB for both the IOMMU and physical addresses. For example, if __domain_mapping() is asked to map a two-entry scatterlist with 2 MB and 1028 MB segments to PFN 0xffff80000, it will ask if dma_pte_free_pagetable() is asked to PFNs from 0xffff80200 to 0xffffc05ff, it will also incorrectly clear the PFNs from 0xffff80000 to 0xffff801ff because of this issue. The current code will set level_pfn to 0xffff80200, and 0xffff80200-0xffffc01ff fits inside the range being cleared. Properly setting the level_pfn for the current level under consideration catches that this PTE is outside of the range being cleared. This patch also changes the value passed into dma_pte_free_level() when it recurses. This only affects the first PTE of the range being cleared, and is handled by the existing code that ensures we start our cursor no lower than start_pfn. This was found when using dma_map_sg() to map large chunks of contiguous memory, which immediatedly led to faults on the first access of the erroneously-deleted mappings. Fixes: 3269ee0b ("intel-iommu: Fix leaks in pagetable freeing") Reviewed-by:
Benjamin Serebrin <serebrin@google.com> Signed-off-by:
David Dillow <dillow@google.com> Signed-off-by:
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Doug Berger authored
commit 9e25ebfe upstream. The pmd containing memblock_limit is cleared by prepare_page_table() which creates the opportunity for early_alloc() to allocate unmapped memory if memblock_limit is not pmd aligned causing a boot-time hang. Commit 965278dc ("ARM: 8356/1: mm: handle non-pmd-aligned end of RAM") attempted to resolve this problem, but there is a path through the adjust_lowmem_bounds() routine where if all memory regions start and end on pmd-aligned addresses the memblock_limit will be set to arm_lowmem_limit. Since arm_lowmem_limit can be affected by the vmalloc early parameter, the value of arm_lowmem_limit may not be pmd-aligned. This commit corrects this oversight such that memblock_limit is always rounded down to pmd-alignment. Fixes: 965278dc ("ARM: 8356/1: mm: handle non-pmd-aligned end of RAM") Signed-off-by:
Doug Berger <opendmb@gmail.com> Suggested-by:
Mark Rutland <mark.rutland@arm.com> Signed-off-by:
Russell King <rmk+kernel@armlinux.org.uk> Signed-off-by:
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Eric Anholt authored
commit fedf266f upstream. The bcm_kona_wdt_set_resolution_reg() call takes the spinlock, so initialize it earlier. Fixes a warning at boot with lock debugging enabled. Fixes: 6adb730d ("watchdog: bcm281xx: Watchdog Driver") Signed-off-by:
Eric Anholt <eric@anholt.net> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Reviewed-by:
Guenter Roeck <linux@roeck-us.net> Signed-off-by:
Wim Van Sebroeck <wim@iguana.be> Signed-off-by:
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