-----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEZH8oZUiU471FcZm+ONu9yGCSaT4FAltj7k8ACgkQONu9yGCS aT54oRAAxn5rT7Mp5coJqSYFgkzVPOSzuVy8BKq+cwJYe50Ut5nkmWr11jJEkEi6 GZw8xahCuHECM6yl4NjvKqlM8PyvswZEnsIw5V4A1tjLWBPbatz5pZ3qEOIYt1iE 2EB8Bq/kxW8kLHWxFJqV2mH0w8/6o8IcejdPhN3IEiPouB0aRtzbcF9X3GjVh8Ec 6lX9iDn4lodC/EmGJqBbuWj8DjHyTuMZOd/WUkLlFGCLK2KlF+/AIy3rYlkPf2R2 HQOLXy2ZSeyG3EI+hNHilEr1OVBkddX04QtNzUWDCHaK+OSRl0jamX/J3qymA0WT OgfwQ67SLqG9QRtM2SpozPq1MjE8SW40pyNePtj6zbndJMEEGRhPYFyyJeL9MtLw 0j63qaQ7A3BygTvj/N194aNyoLZeZ0qMzL9hqP9yGcsh+sW6WkYRdwy6bNGHSzcy B81XrmObYPVT4tlEFv4wftUFBWQKM6Gv4+VNCEpDVkZCCqnxFN3el1zqMmDjcrPn rJOsDMwnFS5kj7kDjvQUQc+rRVUi3Xmc4z3D/OYGEQcRHhI0ztcdmqzdGRR54LfO TL4WnpbIVchKP40RsbcoqgwD/MSThjPbPyXe0Y8cYWae2yigoPe74wvALOHuJ1sv VXWVBIFQOQmH7Iw8hc20Uwm9wd4DxoVbax8urGON6FJlYviBwlI= =tLp7 -----END PGP SIGNATURE----- Merge 4.9.117 into android-4.9 Changes in 4.9.117 Input: elan_i2c - add ACPI ID for lenovo ideapad 330 Input: i8042 - add Lenovo LaVie Z to the i8042 reset list Input: elan_i2c - add another ACPI ID for Lenovo Ideapad 330-15AST kvm, mm: account shadow page tables to kmemcg tracing: Fix double free of event_trigger_data tracing: Fix possible double free in event_enable_trigger_func() kthread, tracing: Don't expose half-written comm when creating kthreads tracing/kprobes: Fix trace_probe flags on enable_trace_kprobe() failure tracing: Quiet gcc warning about maybe unused link variable arm64: fix vmemmap BUILD_BUG_ON() triggering on !vmemmap setups usb: dwc2: Fix DMA alignment to start at allocated boundary kcov: ensure irq code sees a valid area xen/netfront: raise max number of slots in xennet_get_responses() ALSA: emu10k1: add error handling for snd_ctl_add ALSA: fm801: add error handling for snd_ctl_add nfsd: fix potential use-after-free in nfsd4_decode_getdeviceinfo vfio: platform: Fix reset module leak in error path mm: vmalloc: avoid racy handling of debugobjects in vunmap mm/slub.c: add __printf verification to slab_err() rtc: ensure rtc_set_alarm fails when alarms are not supported perf tools: Fix pmu events parsing rule netfilter: ipset: List timing out entries with "timeout 1" instead of zero infiniband: fix a possible use-after-free bug powerpc/eeh: Fix use-after-release of EEH driver hvc_opal: don't set tb_ticks_per_usec in udbg_init_opal_common() powerpc/64s: Fix compiler store ordering to SLB shadow area RDMA/mad: Convert BUG_ONs to error flows netfilter: nf_tables: check msg_type before nft_trans_set(trans) pnfs: Don't release the sequence slot until we've processed layoutget on open disable loading f2fs module on PAGE_SIZE > 4KB f2fs: fix error path of move_data_page f2fs: fix to don't trigger writeback during recovery f2fs: fix to wait page writeback during revoking atomic write f2fs: Fix deadlock in shutdown ioctl f2fs: fix race in between GC and atomic open usbip: usbip_detach: Fix memory, udev context and udev leak perf/x86/intel/uncore: Correct fixed counter index check in generic code perf/x86/intel/uncore: Correct fixed counter index check for NHM selftests/intel_pstate: Improve test, minor fixes iwlwifi: pcie: fix race in Rx buffer allocator Bluetooth: hci_qca: Fix "Sleep inside atomic section" warning Bluetooth: btusb: Add a new Realtek 8723DE ID 2ff8:b011 ASoC: dpcm: fix BE dai not hw_free and shutdown mfd: cros_ec: Fail early if we cannot identify the EC mwifiex: handle race during mwifiex_usb_disconnect wlcore: sdio: check for valid platform device data before suspend media: tw686x: Fix incorrect vb2_mem_ops GFP flags media: videobuf2-core: don't call memop 'finish' when queueing btrfs: add barriers to btrfs_sync_log before log_commit_wait wakeups btrfs: qgroup: Finish rescan when hit the last leaf of extent tree PCI: Prevent sysfs disable of device while driver is attached ath: Add regulatory mapping for FCC3_ETSIC ath: Add regulatory mapping for ETSI8_WORLD ath: Add regulatory mapping for APL13_WORLD ath: Add regulatory mapping for APL2_FCCA ath: Add regulatory mapping for Uganda ath: Add regulatory mapping for Tanzania ath: Add regulatory mapping for Serbia ath: Add regulatory mapping for Bermuda ath: Add regulatory mapping for Bahamas powerpc/32: Add a missing include header powerpc/chrp/time: Make some functions static, add missing header include powerpc/powermac: Add missing prototype for note_bootable_part() powerpc/powermac: Mark variable x as unused powerpc/8xx: fix invalid register expression in head_8xx.S pinctrl: at91-pio4: add missing of_node_put bpf: powerpc64: pad function address loads with NOPs PCI: pciehp: Request control of native hotplug only if supported net: dsa: qca8k: Add support for QCA8334 switch mwifiex: correct histogram data with appropriate index ima: based on policy verify firmware signatures (pre-allocated buffer) drivers/perf: arm-ccn: don't log to dmesg in event_init fscrypt: use unbound workqueue for decryption scsi: ufs: fix exception event handling ALSA: emu10k1: Rate-limit error messages about page errors regulator: pfuze100: add .is_enable() for pfuze100_swb_regulator_ops md: fix NULL dereference of mddev->pers in remove_and_add_spares() ixgbevf: fix MAC address changes through ixgbevf_set_mac() media: smiapp: fix timeout checking in smiapp_read_nvm net: ethernet: ti: cpsw-phy-sel: check bus_find_device() ret value ALSA: usb-audio: Apply rate limit to warning messages in URB complete callback arm64: cmpwait: Clear event register before arming exclusive monitor HID: hid-plantronics: Re-resend Update to map button for PTT products drm/radeon: fix mode_valid's return type powerpc/embedded6xx/hlwd-pic: Prevent interrupts from being handled by Starlet HID: i2c-hid: check if device is there before really probing EDAC, altera: Fix ARM64 build warning ARM: dts: emev2: Add missing interrupt-affinity to PMU node ARM: dts: sh73a0: Add missing interrupt-affinity to PMU node nvmem: properly handle returned value nvmem_reg_read tty: Fix data race in tty_insert_flip_string_fixed_flag dma-iommu: Fix compilation when !CONFIG_IOMMU_DMA media: rcar_jpu: Add missing clk_disable_unprepare() on error in jpu_open() libata: Fix command retry decision media: media-device: fix ioctl function types media: saa7164: Fix driver name in debug output mtd: rawnand: fsl_ifc: fix FSL NAND driver to read all ONFI parameter pages brcmfmac: Add support for bcm43364 wireless chipset s390/cpum_sf: Add data entry sizes to sampling trailer entry perf: fix invalid bit in diagnostic entry bnxt_en: Check unsupported speeds in bnxt_update_link() on PF only. scsi: 3w-9xxx: fix a missing-check bug scsi: 3w-xxxx: fix a missing-check bug scsi: megaraid: silence a static checker bug staging: lustre: o2iblnd: fix race at kiblnd_connect_peer thermal: exynos: fix setting rising_threshold for Exynos5433 bpf: fix references to free_bpf_prog_info() in comments media: siano: get rid of __le32/__le16 cast warnings drm/atomic: Handling the case when setting old crtc for plane ALSA: hda/ca0132: fix build failure when a local macro is defined mmc: dw_mmc: update actual clock for mmc debugfs mmc: pwrseq: Use kmalloc_array instead of stack VLA dt-bindings: pinctrl: meson: add support for the Meson8m2 SoC dt-bindings: net: meson-dwmac: new compatible name for AXG SoC stop_machine: Use raw spinlocks memory: tegra: Do not handle spurious interrupts memory: tegra: Apply interrupts mask per SoC arm64: defconfig: Enable Rockchip io-domain driver drm/gma500: fix psb_intel_lvds_mode_valid()'s return type ipconfig: Correctly initialise ic_nameservers rsi: Fix 'invalid vdd' warning in mmc audit: allow not equal op for audit by executable staging: lustre: llite: correct removexattr detection staging: lustre: ldlm: free resource when ldlm_lock_create() fails. serial: core: Make sure compiler barfs for 16-byte earlycon names microblaze: Fix simpleImage format generation usb: hub: Don't wait for connect state at resume for powered-off ports crypto: authencesn - don't leak pointers to authenc keys crypto: authenc - don't leak pointers to authenc keys media: omap3isp: fix unbalanced dma_iommu_mapping scsi: scsi_dh: replace too broad "TP9" string with the exact models scsi: megaraid_sas: Increase timeout by 1 sec for non-RAID fastpath IOs media: si470x: fix __be16 annotations drm: Add DP PSR2 sink enable bit random: mix rdrand with entropy sent in from userspace squashfs: be more careful about metadata corruption ext4: fix inline data updates with checksums enabled ext4: check for allocation block validity with block group locked RDMA/uverbs: Protect from attempts to create flows on unsupported QP net: dsa: qca8k: Force CPU port to its highest bandwidth net: dsa: qca8k: Enable RXMAC when bringing up a port net: dsa: qca8k: Add QCA8334 binding documentation net: dsa: qca8k: Allow overwriting CPU port setting Linux 4.9.117 Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
439 lines
11 KiB
C
439 lines
11 KiB
C
#define pr_fmt(fmt) "kcov: " fmt
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#define DISABLE_BRANCH_PROFILING
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#include <linux/atomic.h>
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/export.h>
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#include <linux/types.h>
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#include <linux/file.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/preempt.h>
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#include <linux/printk.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/vmalloc.h>
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#include <linux/debugfs.h>
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#include <linux/uaccess.h>
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#include <linux/kcov.h>
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#include <asm/setup.h>
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/* Number of 64-bit words written per one comparison: */
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#define KCOV_WORDS_PER_CMP 4
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/*
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* kcov descriptor (one per opened debugfs file).
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* State transitions of the descriptor:
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* - initial state after open()
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* - then there must be a single ioctl(KCOV_INIT_TRACE) call
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* - then, mmap() call (several calls are allowed but not useful)
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* - then, ioctl(KCOV_ENABLE, arg), where arg is
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* KCOV_TRACE_PC - to trace only the PCs
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* or
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* KCOV_TRACE_CMP - to trace only the comparison operands
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* - then, ioctl(KCOV_DISABLE) to disable the task.
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* Enabling/disabling ioctls can be repeated (only one task a time allowed).
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*/
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struct kcov {
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/*
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* Reference counter. We keep one for:
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* - opened file descriptor
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* - task with enabled coverage (we can't unwire it from another task)
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*/
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atomic_t refcount;
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/* The lock protects mode, size, area and t. */
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spinlock_t lock;
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enum kcov_mode mode;
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/* Size of arena (in long's for KCOV_MODE_TRACE). */
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unsigned size;
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/* Coverage buffer shared with user space. */
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void *area;
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/* Task for which we collect coverage, or NULL. */
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struct task_struct *t;
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};
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static bool check_kcov_mode(enum kcov_mode needed_mode, struct task_struct *t)
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{
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enum kcov_mode mode;
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/*
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* We are interested in code coverage as a function of a syscall inputs,
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* so we ignore code executed in interrupts.
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*/
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if (!in_task())
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return false;
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mode = READ_ONCE(t->kcov_mode);
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/*
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* There is some code that runs in interrupts but for which
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* in_interrupt() returns false (e.g. preempt_schedule_irq()).
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* READ_ONCE()/barrier() effectively provides load-acquire wrt
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* interrupts, there are paired barrier()/WRITE_ONCE() in
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* kcov_ioctl_locked().
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*/
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barrier();
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return mode == needed_mode;
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}
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static unsigned long canonicalize_ip(unsigned long ip)
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{
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#ifdef CONFIG_RANDOMIZE_BASE
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ip -= kaslr_offset();
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#endif
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return ip;
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}
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/*
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* Entry point from instrumented code.
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* This is called once per basic-block/edge.
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*/
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void notrace __sanitizer_cov_trace_pc(void)
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{
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struct task_struct *t;
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unsigned long *area;
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unsigned long ip = canonicalize_ip(_RET_IP_);
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unsigned long pos;
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t = current;
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if (!check_kcov_mode(KCOV_MODE_TRACE_PC, t))
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return;
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area = t->kcov_area;
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/* The first 64-bit word is the number of subsequent PCs. */
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pos = READ_ONCE(area[0]) + 1;
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if (likely(pos < t->kcov_size)) {
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area[pos] = ip;
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WRITE_ONCE(area[0], pos);
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}
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_pc);
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#ifdef CONFIG_KCOV_ENABLE_COMPARISONS
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static void write_comp_data(u64 type, u64 arg1, u64 arg2, u64 ip)
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{
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struct task_struct *t;
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u64 *area;
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u64 count, start_index, end_pos, max_pos;
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t = current;
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if (!check_kcov_mode(KCOV_MODE_TRACE_CMP, t))
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return;
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ip = canonicalize_ip(ip);
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/*
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* We write all comparison arguments and types as u64.
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* The buffer was allocated for t->kcov_size unsigned longs.
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*/
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area = (u64 *)t->kcov_area;
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max_pos = t->kcov_size * sizeof(unsigned long);
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count = READ_ONCE(area[0]);
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/* Every record is KCOV_WORDS_PER_CMP 64-bit words. */
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start_index = 1 + count * KCOV_WORDS_PER_CMP;
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end_pos = (start_index + KCOV_WORDS_PER_CMP) * sizeof(u64);
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if (likely(end_pos <= max_pos)) {
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area[start_index] = type;
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area[start_index + 1] = arg1;
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area[start_index + 2] = arg2;
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area[start_index + 3] = ip;
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WRITE_ONCE(area[0], count + 1);
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}
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}
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void notrace __sanitizer_cov_trace_cmp1(u8 arg1, u8 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(0), arg1, arg2, _RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_cmp1);
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void notrace __sanitizer_cov_trace_cmp2(u16 arg1, u16 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(1), arg1, arg2, _RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_cmp2);
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void notrace __sanitizer_cov_trace_cmp4(u32 arg1, u32 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(2), arg1, arg2, _RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_cmp4);
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void notrace __sanitizer_cov_trace_cmp8(u64 arg1, u64 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(3), arg1, arg2, _RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_cmp8);
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void notrace __sanitizer_cov_trace_const_cmp1(u8 arg1, u8 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(0) | KCOV_CMP_CONST, arg1, arg2,
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_RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_const_cmp1);
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void notrace __sanitizer_cov_trace_const_cmp2(u16 arg1, u16 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(1) | KCOV_CMP_CONST, arg1, arg2,
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_RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_const_cmp2);
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void notrace __sanitizer_cov_trace_const_cmp4(u32 arg1, u32 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(2) | KCOV_CMP_CONST, arg1, arg2,
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_RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_const_cmp4);
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void notrace __sanitizer_cov_trace_const_cmp8(u64 arg1, u64 arg2)
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{
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write_comp_data(KCOV_CMP_SIZE(3) | KCOV_CMP_CONST, arg1, arg2,
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_RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_const_cmp8);
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void notrace __sanitizer_cov_trace_switch(u64 val, u64 *cases)
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{
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u64 i;
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u64 count = cases[0];
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u64 size = cases[1];
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u64 type = KCOV_CMP_CONST;
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switch (size) {
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case 8:
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type |= KCOV_CMP_SIZE(0);
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break;
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case 16:
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type |= KCOV_CMP_SIZE(1);
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break;
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case 32:
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type |= KCOV_CMP_SIZE(2);
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break;
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case 64:
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type |= KCOV_CMP_SIZE(3);
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break;
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default:
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return;
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}
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for (i = 0; i < count; i++)
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write_comp_data(type, cases[i + 2], val, _RET_IP_);
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}
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EXPORT_SYMBOL(__sanitizer_cov_trace_switch);
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#endif /* ifdef CONFIG_KCOV_ENABLE_COMPARISONS */
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static void kcov_get(struct kcov *kcov)
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{
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atomic_inc(&kcov->refcount);
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}
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static void kcov_put(struct kcov *kcov)
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{
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if (atomic_dec_and_test(&kcov->refcount)) {
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vfree(kcov->area);
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kfree(kcov);
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}
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}
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void kcov_task_init(struct task_struct *t)
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{
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WRITE_ONCE(t->kcov_mode, KCOV_MODE_DISABLED);
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barrier();
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t->kcov_size = 0;
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t->kcov_area = NULL;
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t->kcov = NULL;
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}
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void kcov_task_exit(struct task_struct *t)
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{
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struct kcov *kcov;
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kcov = t->kcov;
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if (kcov == NULL)
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return;
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spin_lock(&kcov->lock);
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if (WARN_ON(kcov->t != t)) {
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spin_unlock(&kcov->lock);
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return;
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}
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/* Just to not leave dangling references behind. */
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kcov_task_init(t);
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kcov->t = NULL;
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kcov->mode = KCOV_MODE_INIT;
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spin_unlock(&kcov->lock);
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kcov_put(kcov);
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}
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static int kcov_mmap(struct file *filep, struct vm_area_struct *vma)
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{
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int res = 0;
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void *area;
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struct kcov *kcov = vma->vm_file->private_data;
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unsigned long size, off;
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struct page *page;
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area = vmalloc_user(vma->vm_end - vma->vm_start);
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if (!area)
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return -ENOMEM;
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spin_lock(&kcov->lock);
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size = kcov->size * sizeof(unsigned long);
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if (kcov->mode != KCOV_MODE_INIT || vma->vm_pgoff != 0 ||
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vma->vm_end - vma->vm_start != size) {
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res = -EINVAL;
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goto exit;
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}
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if (!kcov->area) {
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kcov->area = area;
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vma->vm_flags |= VM_DONTEXPAND;
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spin_unlock(&kcov->lock);
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for (off = 0; off < size; off += PAGE_SIZE) {
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page = vmalloc_to_page(kcov->area + off);
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if (vm_insert_page(vma, vma->vm_start + off, page))
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WARN_ONCE(1, "vm_insert_page() failed");
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}
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return 0;
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}
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exit:
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spin_unlock(&kcov->lock);
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vfree(area);
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return res;
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}
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static int kcov_open(struct inode *inode, struct file *filep)
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{
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struct kcov *kcov;
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kcov = kzalloc(sizeof(*kcov), GFP_KERNEL);
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if (!kcov)
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return -ENOMEM;
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kcov->mode = KCOV_MODE_DISABLED;
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atomic_set(&kcov->refcount, 1);
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spin_lock_init(&kcov->lock);
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filep->private_data = kcov;
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return nonseekable_open(inode, filep);
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}
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static int kcov_close(struct inode *inode, struct file *filep)
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{
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kcov_put(filep->private_data);
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return 0;
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}
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static int kcov_ioctl_locked(struct kcov *kcov, unsigned int cmd,
|
|
unsigned long arg)
|
|
{
|
|
struct task_struct *t;
|
|
unsigned long size, unused;
|
|
|
|
switch (cmd) {
|
|
case KCOV_INIT_TRACE:
|
|
/*
|
|
* Enable kcov in trace mode and setup buffer size.
|
|
* Must happen before anything else.
|
|
*/
|
|
if (kcov->mode != KCOV_MODE_DISABLED)
|
|
return -EBUSY;
|
|
/*
|
|
* Size must be at least 2 to hold current position and one PC.
|
|
* Later we allocate size * sizeof(unsigned long) memory,
|
|
* that must not overflow.
|
|
*/
|
|
size = arg;
|
|
if (size < 2 || size > INT_MAX / sizeof(unsigned long))
|
|
return -EINVAL;
|
|
kcov->size = size;
|
|
kcov->mode = KCOV_MODE_INIT;
|
|
return 0;
|
|
case KCOV_ENABLE:
|
|
/*
|
|
* Enable coverage for the current task.
|
|
* At this point user must have been enabled trace mode,
|
|
* and mmapped the file. Coverage collection is disabled only
|
|
* at task exit or voluntary by KCOV_DISABLE. After that it can
|
|
* be enabled for another task.
|
|
*/
|
|
if (kcov->mode != KCOV_MODE_INIT || !kcov->area)
|
|
return -EINVAL;
|
|
if (kcov->t != NULL)
|
|
return -EBUSY;
|
|
if (arg == KCOV_TRACE_PC)
|
|
kcov->mode = KCOV_MODE_TRACE_PC;
|
|
else if (arg == KCOV_TRACE_CMP)
|
|
#ifdef CONFIG_KCOV_ENABLE_COMPARISONS
|
|
kcov->mode = KCOV_MODE_TRACE_CMP;
|
|
#else
|
|
return -ENOTSUPP;
|
|
#endif
|
|
else
|
|
return -EINVAL;
|
|
t = current;
|
|
if (kcov->t != NULL || t->kcov != NULL)
|
|
return -EBUSY;
|
|
/* Cache in task struct for performance. */
|
|
t->kcov_size = kcov->size;
|
|
t->kcov_area = kcov->area;
|
|
/* See comment in check_kcov_mode(). */
|
|
barrier();
|
|
WRITE_ONCE(t->kcov_mode, kcov->mode);
|
|
t->kcov = kcov;
|
|
kcov->t = t;
|
|
/* This is put either in kcov_task_exit() or in KCOV_DISABLE. */
|
|
kcov_get(kcov);
|
|
return 0;
|
|
case KCOV_DISABLE:
|
|
/* Disable coverage for the current task. */
|
|
unused = arg;
|
|
if (unused != 0 || current->kcov != kcov)
|
|
return -EINVAL;
|
|
t = current;
|
|
if (WARN_ON(kcov->t != t))
|
|
return -EINVAL;
|
|
kcov_task_init(t);
|
|
kcov->t = NULL;
|
|
kcov->mode = KCOV_MODE_INIT;
|
|
kcov_put(kcov);
|
|
return 0;
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
static long kcov_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct kcov *kcov;
|
|
int res;
|
|
|
|
kcov = filep->private_data;
|
|
spin_lock(&kcov->lock);
|
|
res = kcov_ioctl_locked(kcov, cmd, arg);
|
|
spin_unlock(&kcov->lock);
|
|
return res;
|
|
}
|
|
|
|
static const struct file_operations kcov_fops = {
|
|
.open = kcov_open,
|
|
.unlocked_ioctl = kcov_ioctl,
|
|
.compat_ioctl = kcov_ioctl,
|
|
.mmap = kcov_mmap,
|
|
.release = kcov_close,
|
|
};
|
|
|
|
static int __init kcov_init(void)
|
|
{
|
|
/*
|
|
* The kcov debugfs file won't ever get removed and thus,
|
|
* there is no need to protect it against removal races. The
|
|
* use of debugfs_create_file_unsafe() is actually safe here.
|
|
*/
|
|
if (!debugfs_create_file_unsafe("kcov", 0600, NULL, NULL, &kcov_fops)) {
|
|
pr_err("failed to create kcov in debugfs\n");
|
|
return -ENOMEM;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
device_initcall(kcov_init);
|