- 15 Jun, 2016 13 commits
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Dmitry Ivanov authored
commit 8f815cdd upstream. A non-privileged user can create a netlink socket with the same port_id as used by an existing open nl80211 netlink socket (e.g. as used by a hostapd process) with a different protocol number. Closing this socket will then lead to the notification going to nl80211's socket release notification handler, and possibly cause an action such as removing a virtual interface. Fix this issue by checking that the netlink protocol is NETLINK_GENERIC. Since generic netlink has no notifier chain of its own, we can't fix the problem more generically. Fixes: 026331c4 ("cfg80211/mac80211: allow registering for and sending action frames") Signed-off-by:
Dmitry Ivanov <dima@ubnt.com> [rewrite commit message] Signed-off-by:
Johannes Berg <johannes.berg@intel.com> Signed-off-by:
Ben Hutchings <ben@decadent.org.uk>
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David Matlack authored
commit fc5b7f3b upstream. An interrupt handler that uses the fpu can kill a KVM VM, if it runs under the following conditions: - the guest's xcr0 register is loaded on the cpu - the guest's fpu context is not loaded - the host is using eagerfpu Note that the guest's xcr0 register and fpu context are not loaded as part of the atomic world switch into "guest mode". They are loaded by KVM while the cpu is still in "host mode". Usage of the fpu in interrupt context is gated by irq_fpu_usable(). The interrupt handler will look something like this: if (irq_fpu_usable()) { kernel_fpu_begin(); [... code that uses the fpu ...] kernel_fpu_end(); } As long as the guest's fpu is not loaded and the host is using eager fpu, irq_fpu_usable() returns true (interrupted_kernel_fpu_idle() returns true). The interrupt handler proceeds to use the fpu with the guest's xcr0 live. kernel_fpu_begin() saves the current fpu context. If this uses XSAVE[OPT], it may leave the xsave area in an undesirable state. According to the SDM, during XSAVE bit i of XSTATE_BV is not modified if bit i is 0 in xcr0. So it's possible that XSTATE_BV[i] == 1 and xcr0[i] == 0 following an XSAVE. kernel_fpu_end() restores the fpu context. Now if any bit i in XSTATE_BV == 1 while xcr0[i] == 0, XRSTOR generates a #GP. The fault is trapped and SIGSEGV is delivered to the current process. Only pre-4.2 kernels appear to be vulnerable to this sequence of events. Commit 653f52c3 ("kvm,x86: load guest FPU context more eagerly") from 4.2 forces the guest's fpu to always be loaded on eagerfpu hosts. This patch fixes the bug by keeping the host's xcr0 loaded outside of the interrupts-disabled region where KVM switches into guest mode. Suggested-by:
Andy Lutomirski <luto@amacapital.net> Signed-off-by:
David Matlack <dmatlack@google.com> [Move load after goto cancel_injection. - Paolo] Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com> [bwh: Backported to 3.2: - Adjust context - Drop change in__kvm_set_xcr()] Signed-off-by:
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Srinivas Kandagatla authored
commit 2fd0f46c upstream. In usecases where force_port_map is used saved_port_map is never set, resulting in not programming the PORTS_IMPL register as part of initial config. This patch fixes this by setting it to port_map even in case where force_port_map is used, making it more inline with other parts of the code. Fixes: 566d1827 ("libata: disable forced PORTS_IMPL for >= AHCI 1.3") Signed-off-by:
Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Acked-by:
Tejun Heo <tj@kernel.org> Reviewed-by:
Andy Gross <andy.gross@linaro.org> Signed-off-by:
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Vladis Dronov authored
commit 162f98de upstream. The gtco driver expects at least one valid endpoint. If given malicious descriptors that specify 0 for the number of endpoints, it will crash in the probe function. Ensure there is at least one endpoint on the interface before using it. Also let's fix a minor coding style issue. The full correct report of this issue can be found in the public Red Hat Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1283385Reported-by:
Ralf Spenneberg <ralf@spenneberg.net> Signed-off-by:
Vladis Dronov <vdronov@redhat.com> Signed-off-by:
Dmitry Torokhov <dmitry.torokhov@gmail.com> [bwh: Backported to 3.2: adjust context] Signed-off-by:
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Xie XiuQi authored
commit e21404dc upstream. Loading ipmi_si module while bmc is disconnected, we found the timeout is longer than 5 secs. Actually it takes about 3 mins and 20 secs.(HZ=250) error message as below: Dec 12 19:08:59 linux kernel: IPMI BT: timeout in RD_WAIT [ ] 1 retries left Dec 12 19:08:59 linux kernel: BT: write 4 bytes seq=0x01 03 18 00 01 [...] Dec 12 19:12:19 linux kernel: IPMI BT: timeout in RD_WAIT [ ] Dec 12 19:12:19 linux kernel: failed 2 retries, sending error response Dec 12 19:12:19 linux kernel: IPMI: BT reset (takes 5 secs) Dec 12 19:12:19 linux kernel: IPMI BT: flag reset [ ] Function wait_for_msg_done() use schedule_timeout_uninterruptible(1) to sleep 1 tick, so we should subtract jiffies_to_usecs(1) instead of 100 usecs from timeout. Reported-by:
Hu Shiyuan <hushiyuan@huawei.com> Signed-off-by:
Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by:
Corey Minyard <cminyard@mvista.com> Signed-off-by:
Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by:
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Steven Rostedt authored
commit df90ca96 upstream. Commit ff47ab4f "x86: Add 1/2/4/8 byte optimization to 64bit __copy_{from,to}_user_inatomic" added a "_nocheck" call in between the copy_to/from_user() and copy_user_generic(). As both the normal and nocheck versions of theses calls use the proper __user annotation, a typecast to remove it should not be added. This causes sparse to spin out the following warnings: arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces) arch/x86/include/asm/uaccess_64.h:207:47: expected void const [noderef] <asn:1>*src arch/x86/include/asm/uaccess_64.h:207:47: got void const *<noident> arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces) arch/x86/include/asm/uaccess_64.h:207:47: expected void const [noderef] <asn:1>*src arch/x86/include/asm/uaccess_64.h:207:47: got void const *<noident> arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces) arch/x86/include/asm/uaccess_64.h:207:47: expected void const [noderef] <asn:1>*src arch/x86/include/asm/uaccess_64.h:207:47: got void const *<noident> arch/x86/include/asm/uaccess_64.h:207:47: warning: incorrect type in argument 2 (different address spaces) arch/x86/include/asm/uaccess_64.h:207:47: expected void const [noderef] <asn:1>*src arch/x86/include/asm/uaccess_64.h:207:47: got void const *<noident> Cc: Andi Kleen <ak@linux.intel.com> Signed-off-by:
Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20140103164500.5f6478f5@gandalf.local.homeSigned-off-by:
H. Peter Anvin <hpa@linux.intel.com> Signed-off-by:
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Andi Kleen authored
commit ff47ab4f upstream. The 64bit __copy_{from,to}_user_inatomic always called copy_from_user_generic, but skipped the special optimizations for 1/2/4/8 byte accesses. This especially hurts the futex call, which accesses the 4 byte futex user value with a complicated fast string operation in a function call, instead of a single movl. Use __copy_{from,to}_user for _inatomic instead to get the same optimizations. The only problem was the might_fault() in those functions. So move that to new wrapper and call __copy_{f,t}_user_nocheck() from *_inatomic directly. 32bit already did this correctly by duplicating the code. Signed-off-by:
Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/1376687844-19857-2-git-send-email-andi@firstfloor.orgSigned-off-by:
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Herbert Xu authored
This bug has already bee fixed upstream since 4.2. However, it was fixed during the AEAD conversion so no fix was backported to the older kernels. When we do an RFC 4543 decryption, we will end up writing the ICV beyond the end of the dst buffer. This should lead to a crash but for some reason it was never noticed. This patch fixes it by only writing back the ICV for encryption. Fixes: d733ac90 ("crypto: gcm - fix rfc4543 to handle async...") Reported-by:
Patrick Meyer <patrick.meyer@vasgard.com> Signed-off-by:
Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by:
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Jussi Kivilinna authored
commit d733ac90 upstream. If the gcm cipher used by rfc4543 does not complete request immediately, the authentication tag is not copied to destination buffer. Patch adds correct async logic for this case. Signed-off-by:
Jussi Kivilinna <jussi.kivilinna@iki.fi> Signed-off-by:
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Borislav Petkov authored
commit 0399f732 upstream. A certain number of patch levels of applied microcode should not be overwritten by the microcode loader, otherwise bad things will happen. Check those and abort update if the current core has one of those final patch levels applied by the BIOS. 32-bit needs special handling, of course. See https://bugzilla.suse.com/show_bug.cgi?id=913996 for more info. Tested-by:
Peter Kirchgeßner <pkirchgessner@t-online.de> Signed-off-by:
Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1444641762-9437-7-git-send-email-bp@alien8.deSigned-off-by:
Ingo Molnar <mingo@kernel.org> Signed-off-by:
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Borislav Petkov authored
commit 2eff73c0 upstream. Pave the way for checking the current patch level of the microcode in a core. We want to be able to do stuff depending on the patch level - in this case decide whether to update or not. But that will be added in a later patch. Drop unused local var uci assignment, while at it. Integrate a fix for 32-bit and CONFIG_PARAVIRT from Takashi Iwai: Use native_rdmsr() in check_current_patch_level() because with CONFIG_PARAVIRT enabled and on 32-bit, where we run before paging has been enabled, we cannot deref pv_info yet. Or we could, but we'd need to access its physical address. This way of fixing it is simpler. See: https://bugzilla.suse.com/show_bug.cgi?id=943179 for the background. Signed-off-by:
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Ben Hutchings authored
This reverts commit b5518429, which was commit 2793a23a upstream. It is pointless unless af_packet calls the new function. Signed-off-by:
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Ben Hutchings authored
This reverts commit 0954b59d, which was commit ea47781c upstream. It is pointless unless af_packet calls the new function. Signed-off-by:
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- 30 Apr, 2016 27 commits
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Ben Hutchings authored
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Florian Westphal authored
commit 54d83fc7 upstream. Ben Hawkes says: In the mark_source_chains function (net/ipv4/netfilter/ip_tables.c) it is possible for a user-supplied ipt_entry structure to have a large next_offset field. This field is not bounds checked prior to writing a counter value at the supplied offset. Problem is that mark_source_chains should not have been called -- the rule doesn't have a next entry, so its supposed to return an absolute verdict of either ACCEPT or DROP. However, the function conditional() doesn't work as the name implies. It only checks that the rule is using wildcard address matching. However, an unconditional rule must also not be using any matches (no -m args). The underflow validator only checked the addresses, therefore passing the 'unconditional absolute verdict' test, while mark_source_chains also tested for presence of matches, and thus proceeeded to the next (not-existent) rule. Unify this so that all the callers have same idea of 'unconditional rule'. Reported-by:
Ben Hawkes <hawkes@google.com> Signed-off-by:
Florian Westphal <fw@strlen.de> Signed-off-by:
Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by:
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Guo-Fu Tseng authored
commit 81422e67 upstream. According to Documentation/power/devices.txt The driver should not use device_set_wakeup_enable() which is the policy for user to decide. Using device_init_wakeup() to initialize dev->power.should_wakeup and dev->power.can_wakeup on driver initialization. And use device_may_wakeup() on suspend to decide if WoL function should be enabled on NIC. Reported-by:
Diego Viola <diego.viola@gmail.com> Signed-off-by:
Guo-Fu Tseng <cooldavid@cooldavid.org> Signed-off-by:
David S. Miller <davem@davemloft.net> [bwh: Backported to 3.2: adjust context] Signed-off-by:
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Guo-Fu Tseng authored
commit 0772a99b upstream. Otherwise it might be back on resume right after going to suspend in some hardware. Reported-by:
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Jakub Sitnicki authored
[ Upstream commit 3ba3458f ] When sending a UDPv6 message longer than MTU, account for the length of fragmentable IPv6 extension headers in skb->network_header offset. Same as we do in alloc_new_skb path in __ip6_append_data(). This ensures that later on __ip6_make_skb() will make space in headroom for fragmentable extension headers: /* move skb->data to ip header from ext header */ if (skb->data < skb_network_header(skb)) __skb_pull(skb, skb_network_offset(skb)); Prevents a splat due to skb_under_panic: skbuff: skb_under_panic: text:ffffffff8143397b len:2126 put:14 \ head:ffff880005bacf50 data:ffff880005bacf4a tail:0x48 end:0xc0 dev:lo ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:104! invalid opcode: 0000 [#1] KASAN CPU: 0 PID: 160 Comm: reproducer Not tainted 4.6.0-rc2 #65 [...] Call Trace: [<ffffffff813eb7b9>] skb_push+0x79/0x80 [<ffffffff8143397b>] eth_header+0x2b/0x100 [<ffffffff8141e0d0>] neigh_resolve_output+0x210/0x310 [<ffffffff814eab77>] ip6_finish_output2+0x4a7/0x7c0 [<ffffffff814efe3a>] ip6_output+0x16a/0x280 [<ffffffff815440c1>] ip6_local_out+0xb1/0xf0 [<ffffffff814f1115>] ip6_send_skb+0x45/0xd0 [<ffffffff81518836>] udp_v6_send_skb+0x246/0x5d0 [<ffffffff8151985e>] udpv6_sendmsg+0xa6e/0x1090 [...] Reported-by:
Ji Jianwen <jiji@redhat.com> Signed-off-by:
Jakub Sitnicki <jkbs@redhat.com> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
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Haishuang Yan authored
[ Upstream commit 5745b823 ] pskb_may_pull() can change skb->data, so we have to load ptr/optr at the right place. Signed-off-by:
Haishuang Yan <yanhaishuang@cmss.chinamobile.com> Signed-off-by:
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subashab@codeaurora.org authored
[ Upstream commit 071d36bf ] A crash is observed when a decrypted packet is processed in receive path. get_rps_cpus() tries to dereference the skb->dev fields but it appears that the device is freed from the poison pattern. [<ffffffc000af58ec>] get_rps_cpu+0x94/0x2f0 [<ffffffc000af5f94>] netif_rx_internal+0x140/0x1cc [<ffffffc000af6094>] netif_rx+0x74/0x94 [<ffffffc000bc0b6c>] xfrm_input+0x754/0x7d0 [<ffffffc000bc0bf8>] xfrm_input_resume+0x10/0x1c [<ffffffc000ba6eb8>] esp_input_done+0x20/0x30 [<ffffffc0000b64c8>] process_one_work+0x244/0x3fc [<ffffffc0000b7324>] worker_thread+0x2f8/0x418 [<ffffffc0000bb40c>] kthread+0xe0/0xec -013|get_rps_cpu( | dev = 0xFFFFFFC08B688000, | skb = 0xFFFFFFC0C76AAC00 -> ( | dev = 0xFFFFFFC08B688000 -> ( | name = "...................................................... | name_hlist = (next = 0xAAAAAAAAAAAAAAAA, pprev = 0xAAAAAAAAAAA Following are the sequence of events observed - - Encrypted packet in receive path from netdevice is queued - Encrypted packet queued for decryption (asynchronous) - Netdevice brought down and freed - Packet is decrypted and returned through callback in esp_input_done - Packet is queued again for process in network stack using netif_rx Since the device appears to have been freed, the dereference of skb->dev in get_rps_cpus() leads to an unhandled page fault exception. Fix this by holding on to device reference when queueing packets asynchronously and releasing the reference on call back return. v2: Make the change generic to xfrm as mentioned by Steffen and update the title to xfrm Suggested-by:
Jerome Stanislaus <jeromes@codeaurora.org> Signed-off-by:
Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Signed-off-by:
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Manish Chopra authored
[ Upstream commit 2c9a266a ] When running small packets [length < 256 bytes] traffic, packets were being dropped due to invalid data in those packets which were delivered by the driver upto the stack. Using pci_dma_sync_single_for_cpu ensures copying latest and updated data into skb from the receive buffer. Signed-off-by:
Sony Chacko <sony.chacko@qlogic.com> Signed-off-by:
Manish Chopra <manish.chopra@qlogic.com> Signed-off-by:
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Arnd Bergmann authored
[ Upstream commit e725a66c ] gcc-6 finds an out of bounds access in the fst_add_one function when calculating the end of the mmio area: drivers/net/wan/farsync.c: In function 'fst_add_one': drivers/net/wan/farsync.c:418:53: error: index 2 denotes an offset greater than size of 'u8[2][8192] {aka unsigned char[2][8192]}' [-Werror=array-bounds] #define BUF_OFFSET(X) (BFM_BASE + offsetof(struct buf_window, X)) ^ include/linux/compiler-gcc.h:158:21: note: in definition of macro '__compiler_offsetof' __builtin_offsetof(a, b) ^ drivers/net/wan/farsync.c:418:37: note: in expansion of macro 'offsetof' #define BUF_OFFSET(X) (BFM_BASE + offsetof(struct buf_window, X)) ^~~~~~~~ drivers/net/wan/farsync.c:2519:36: note: in expansion of macro 'BUF_OFFSET' + BUF_OFFSET ( txBuffer[i][NUM_TX_BUFFER][0]); ^~~~~~~~~~ The warning is correct, but not critical because this appears to be a write-only variable that is set by each WAN driver but never accessed afterwards. I'm taking the minimal fix here, using the correct pointer by pointing 'mem_end' to the last byte inside of the register area as all other WAN drivers do, rather than the first byte outside of it. An alternative would be to just remove the mem_end member entirely. Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Signed-off-by:
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Willem de Bruijn authored
[ Upstream commit 8e2ad411 ] The stack expects link layer headers in the skb linear section. Macvtap can create skbs with llheader in frags in edge cases: when (IFF_VNET_HDR is off or vnet_hdr.hdr_len < ETH_HLEN) and prepad + len > PAGE_SIZE and vnet_hdr.flags has no or bad csum. Add checks to ensure linear is always at least ETH_HLEN. At this point, len is already ensured to be >= ETH_HLEN. For backwards compatiblity, rounds up short vnet_hdr.hdr_len. This differs from tap and packet, which return an error. Fixes b9fb9ee0 ("macvtap: add GSO/csum offload support") Signed-off-by:
Willem de Bruijn <willemb@google.com> Signed-off-by:
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Sergei Shtylyov authored
[ Upstream commit c1b7fca6 ] In a low memory situation, if netdev_alloc_skb() fails on a first RX ring loop iteration in sh_eth_ring_format(), 'rxdesc' is still NULL. Avoid kernel oops by adding the 'rxdesc' check after the loop. Reported-by:
Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by:
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com> Signed-off-by:
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Willem de Bruijn authored
[ Upstream commit ea47781c ] As variable length protocol, AX25 fails link layer header validation tests based on a minimum length. header_ops.validate allows protocols to validate headers that are shorter than hard_header_len. Implement this callback for AX25. See also http://comments.gmane.org/gmane.linux.network/401064Signed-off-by:
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Willem de Bruijn authored
[ Upstream commit 2793a23a ] Netdevice parameter hard_header_len is variously interpreted both as an upper and lower bound on link layer header length. The field is used as upper bound when reserving room at allocation, as lower bound when validating user input in PF_PACKET. Clarify the definition to be maximum header length. For validation of untrusted headers, add an optional validate member to header_ops. Allow bypassing of validation by passing CAP_SYS_RAWIO, for instance for deliberate testing of corrupt input. In this case, pad trailing bytes, as some device drivers expect completely initialized headers. See also http://comments.gmane.org/gmane.linux.network/401064Signed-off-by:
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Bjørn Mork authored
[ Upstream commit 48906f62 ] Some devices will silently fail setup unless they are reset first. This is necessary even if the data interface is already in altsetting 0, which it will be when the device is probed for the first time. Briefly toggling the altsetting forces a function reset regardless of the initial state. This fixes a setup problem observed on a number of Huawei devices, appearing to operate in NTB-32 mode even if we explicitly set them to NTB-16 mode. Signed-off-by:
Bjørn Mork <bjorn@mork.no> Signed-off-by:
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Xin Long authored
[ Upstream commit 40b4f0fd ] As the member .cmp_addr of sctp_af_inet6, sctp_v6_cmp_addr should also check the port of addresses, just like sctp_v4_cmp_addr, cause it's invoked by sctp_cmp_addr_exact(). Now sctp_v6_cmp_addr just check the port when two addresses have different family, and lack the port check for two ipv6 addresses. that will make sctp_hash_cmp() cannot work well. so fix it by adding ports comparison in sctp_v6_cmp_addr(). Signed-off-by:
Xin Long <lucien.xin@gmail.com> Signed-off-by:
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Diego Viola authored
[ Upstream commit ee50c130 ] The JMC260 network card fails to suspend/resume because the call to jme_start_irq() was too early, moving the call to jme_start_irq() after the call to jme_reset_link() makes it work. Prior this change suspend/resume would fail unless /sys/power/pm_async=0 was explicitly specified. Relevant bug report: https://bugzilla.kernel.org/show_bug.cgi?id=112351Signed-off-by:
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Geert Uytterhoeven authored
commit ff1cab37 upstream. The BSP team noticed that there is spin/mutex lock issue on sh-sci when CPUFREQ is used. The issue is that the notifier function may call mutex_lock() while the spinlock is held, which can lead to a BUG(). This may happen if CPUFREQ is changed while another CPU calls clk_get_rate(). Taking the spinlock was added to the notifier function in commit e552de24 ("sh-sci: add platform device private data"), to protect the list of serial ports against modification during traversal. At that time the Common Clock Framework didn't exist yet, and clk_get_rate() just returned clk->rate without taking a mutex. Note that since commit d535a230 ("serial: sh-sci: Require a device per port mapping."), there's no longer a list of serial ports to traverse, and taking the spinlock became superfluous. To fix the issue, just remove the cpufreq notifier: 1. The notifier doesn't work correctly: all it does is update the stored clock rate; it does not update the divider in the hardware. The divider will only be updated when calling sci_set_termios(). I believe this was broken back in 2004, when the old drivers/char/sh-sci.c driver (where the notifier did update the divider) was replaced by drivers/serial/sh-sci.c (where the notifier just updated port->uartclk). Cfr. full-history-linux commits 6f8deaef2e9675d9 ("[PATCH] sh: port sh-sci driver to the new API") and 3f73fe878dc9210a ("[PATCH] Remove old sh-sci driver"). 2. On modern SoCs, the sh-sci parent clock rate is no longer related to the CPU clock rate anyway, so using a cpufreq notifier is futile. Signed-off-by:
Geert Uytterhoeven <geert+renesas@glider.be> [bwh: Backported to 3.2: adjust context] Signed-off-by:
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Hannes Reinecke authored
commit 2d99b55d upstream. Commit 35dc2483 introduced a check for current->mm to see if we have a user space context and only copies data if we do. Now if an IO gets interrupted by a signal data isn't copied into user space any more (as we don't have a user space context) but user space isn't notified about it. This patch modifies the behaviour to return -EINTR from bio_uncopy_user() to notify userland that a signal has interrupted the syscall, otherwise it could lead to a situation where the caller may get a buffer with no data returned. This can be reproduced by issuing SG_IO ioctl()s in one thread while constantly sending signals to it. Fixes: 35dc2483 [SCSI] sg: Fix user memory corruption when SG_IO is interrupted by a signal Signed-off-by:
Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by:
Hannes Reinecke <hare@suse.de> Signed-off-by:
Jens Axboe <axboe@fb.com> [bwh: Backported to 3.2: - Adjust filename - Put the assignment in the existing 'else' block] Signed-off-by:
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Neil Horman authored
[ Upstream commit d9749fb5 ] Dmitry Vyukov noted recently that the sctp_port_hashtable had an error in its size computation, observing that the current method never guaranteed that the hashsize (measured in number of entries) would be a power of two, which the input hash function for that table requires. The root cause of the problem is that two values need to be computed (one, the allocation order of the storage requries, as passed to __get_free_pages, and two the number of entries for the hash table). Both need to be ^2, but for different reasons, and the existing code is simply computing one order value, and using it as the basis for both, which is wrong (i.e. it assumes that ((1<<order)*PAGE_SIZE)/sizeof(bucket) is still ^2 when its not). To fix this, we change the logic slightly. We start by computing a goal allocation order (which is limited by the maximum size hash table we want to support. Then we attempt to allocate that size table, decreasing the order until a successful allocation is made. Then, with the resultant successful order we compute the number of buckets that hash table supports, which we then round down to the nearest power of two, giving us the number of entries the table actually supports. I've tested this locally here, using non-debug and spinlock-debug kernels, and the number of entries in the hashtable consistently work out to be powers of two in all cases. Signed-off-by:
Neil Horman <nhorman@tuxdriver.com> Reported-by:
Dmitry Vyukov <dvyukov@google.com> CC: Dmitry Vyukov <dvyukov@google.com> CC: Vladislav Yasevich <vyasevich@gmail.com> CC: "David S. Miller" <davem@davemloft.net> Signed-off-by:
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Guillaume Nault authored
[ Upstream commit 29e73269 ] Drop reference on the relay_po socket when __pppoe_xmit() succeeds. This is already handled correctly in the error path. Signed-off-by:
Guillaume Nault <g.nault@alphalink.fr> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 91948309 ] Dmitry reported memory leaks of IP options allocated in ip_cmsg_send() when/if this function returns an error. Callers are responsible for the freeing. Many thanks to Dmitry for the report and diagnostic. Reported-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Hangbin Liu authored
[ Upstream commit 8013d1d7 ] Commit 6fd99094 ("ipv6: Don't reduce hop limit for an interface") disabled accept hop limit from RA if it is smaller than the current hop limit for security stuff. But this behavior kind of break the RFC definition. RFC 4861, 6.3.4. Processing Received Router Advertisements A Router Advertisement field (e.g., Cur Hop Limit, Reachable Time, and Retrans Timer) may contain a value denoting that it is unspecified. In such cases, the parameter should be ignored and the host should continue using whatever value it is already using. If the received Cur Hop Limit value is non-zero, the host SHOULD set its CurHopLimit variable to the received value. So add sysctl option accept_ra_min_hop_limit to let user choose the minimum hop limit value they can accept from RA. And set default to 1 to meet RFC standards. Signed-off-by:
Hangbin Liu <liuhangbin@gmail.com> Acked-by:
YOSHIFUJI Hideaki <hideaki.yoshifuji@miraclelinux.com> Signed-off-by:
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Paolo Abeni authored
[ Upstream commit 1cdda918 ] Currently, the egress interface index specified via IPV6_PKTINFO is ignored by __ip6_datagram_connect(), so that RFC 3542 section 6.7 can be subverted when the user space application calls connect() before sendmsg(). Fix it by initializing properly flowi6_oif in connect() before performing the route lookup. Signed-off-by:
Paolo Abeni <pabeni@redhat.com> Acked-by:
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Manfred Rudigier authored
[ Upstream commit 81e8f2e9 ] PHY status frames are not reliable, the PHY may not be able to send them during heavy receive traffic. This overflow condition is signaled by the PHY in the next status frame, but the driver did not make use of it. Instead it always reported wrong tx timestamps to user space after an overflow happened because it assigned newly received tx timestamps to old packets in the queue. This commit fixes this issue by clearing the tx timestamp queue every time an overflow happens, so that no timestamps are delivered for overflow packets. This way time stamping will continue correctly after an overflow. Signed-off-by:
Manfred Rudigier <manfred.rudigier@omicron.at> Acked-by:
Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Ursula Braun authored
[ Upstream commit 52a82e23 ] Signed-off-by:
Ursula Braun <ursula.braun@de.ibm.com> Reported-by:
Evgeny Cherkashin <Eugene.Crosser@ru.ibm.com> Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 34ae6a1a ] When a tunnel decapsulates the outer header, it has to comply with RFC 6080 and eventually propagate CE mark into inner header. It turns out IP6_ECN_set_ce() does not correctly update skb->csum for CHECKSUM_COMPLETE packets, triggering infamous "hw csum failure" messages and stack traces. Signed-off-by:
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Eric Dumazet authored
[ Upstream commit 7aaed57c ] Ivaylo Dimitrov reported a regression caused by commit 7866a621 ("dev: add per net_device packet type chains"). skb->dev becomes NULL and we crash in __netif_receive_skb_core(). Before above commit, different kind of bugs or corruptions could happen without major crash. But the root cause is that phonet_rcv() can queue skb without checking if skb is shared or not. Many thanks to Ivaylo Dimitrov for his help, diagnosis and tests. Reported-by:
Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com> Tested-by:
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