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Syzkaller
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linuxHangTaskFrameExtractor

How to use linuxHangTaskFrameExtractor method of report Package

Best Syzkaller code snippet using report.linuxHangTaskFrameExtractor

linux.go

Source:linux.go

...582		prev = frame583	}584	return "", "did not find any anchor frame"585}586func linuxHangTaskFrameExtractor(frames []string) (string, string) {587	// The problem with task hung reports is that they manifest at random victim stacks,588	// rather at the root cause stack. E.g. if there is something wrong with RCU subsystem,589	// we are getting hangs all over the kernel on all synchronize_* calls.590	// So before resotring to the common logic of skipping some common frames,591	// we look for 2 common buckets: hangs on synchronize_rcu and hangs on rtnl_lock592	// and group these together.593	const synchronizeRCU = "synchronize_rcu"594	anchorFrames := map[string]string{595		"rtnl_lock":         "",596		"synchronize_rcu":   synchronizeRCU,597		"synchronize_srcu":  synchronizeRCU,598		"synchronize_net":   synchronizeRCU,599		"synchronize_sched": synchronizeRCU,600	}601	for _, frame := range frames {602		for anchor, replacement := range anchorFrames {603			if strings.HasPrefix(frame, anchor) {604				if replacement != "" {605					frame = replacement606				}607				return frame, ""608			}609		}610	}611	skip := []string{"sched", "_lock", "_slowlock", "down", "rwsem", "completion", "kthread",612		"wait", "synchronize", "context_switch", "__switch_to", "cancel_delayed_work"}613nextFrame:614	for _, frame := range frames {615		for _, ignore := range skip {616			if strings.Contains(frame, ignore) {617				continue nextFrame618			}619		}620		return frame, ""621	}622	return "", "all frames are skipped"623}624var linuxStallAnchorFrames = []*regexp.Regexp{625	// Various generic functions that dispatch work.626	// We also include some of their callers, so that if some names change627	// we don't skip whole stacks and proceed parsing the next one.628	compile("process_one_work"),  // workqueue callback629	compile("do_syscall_"),       // syscall entry630	compile("do_fast_syscall_"),  // syscall entry631	compile("sysenter_dispatch"), // syscall entry632	compile("tracesys_phase2"),   // syscall entry633	compile("netif_receive_skb"), // net receive entry point634	compile("do_softirq"),635	compile("call_timer_fn"),636	compile("_run_timers"),637	compile("run_timer_softirq"),638	compile("run_ksoftirqd"),639	compile("smpboot_thread_fn"),640	compile("kthread"),641	compile("start_secondary"),642	compile("cpu_startup_entry"),643	compile("ret_from_fork"),644	// Important discriminated syscalls (file_operations callbacks, etc):645	compile("vfs_write"),646	compile("vfs_read"),647	compile("vfs_iter_read"),648	compile("vfs_iter_write"),649	compile("do_iter_read"),650	compile("do_iter_write"),651	compile("vfs_ioctl"),652	compile("ksys_ioctl"), // vfs_ioctl may be inlined653	compile("compat_ioctl"),654	compile("compat_sys_ioctl"),655	compile("blkdev_driver_ioctl"),656	compile("blkdev_ioctl"),657	compile("^call_read_iter"),658	compile("^call_write_iter"),659	compile("do_iter_readv_writev"),660	compile("^call_mmap"),661	compile("mmap_region"),662	compile("do_mmap"),663	compile("do_dentry_open"),664	compile("vfs_open"),665	// Socket operations:666	compile("^sock_sendmsg"),667	compile("^sock_recvmsg"),668	compile("^sock_release"),669	compile("^__sock_release"),670	compile("__sys_setsockopt"),671	compile("kernel_setsockopt"),672	compile("sock_common_setsockopt"),673	compile("__sys_listen"),674	compile("kernel_listen"),675	compile("sk_common_release"),676	compile("^sock_mmap"),677	compile("__sys_accept"),678	compile("kernel_accept"),679	compile("^sock_do_ioctl"),680	compile("^sock_ioctl"),681	compile("^compat_sock_ioctl"),682	compile("^nfnetlink_rcv_msg"),683	compile("^(compat_)?(SYSC|SyS|__sys|___sys|__do_sys|__se_sys|__x64_sys)_(socketpair|connect|ioctl)"),684	// Page fault entry points:685	compile("__do_fault"),686	compile("handle_mm_fault"),687	compile("do_page_fault"),688	compile("^page_fault$"),689	// exit_to_usermode_loop callbacks:690	compile("__fput"),691	compile("task_work_run"),692	compile("exit_to_usermode"),693}694// nolint: lll695var (696	linuxSymbolizeRe  = regexp.MustCompile(`(?:\[\<(?:[0-9a-f]+)\>\])?[ \t]+(?:[0-9]+:)?([a-zA-Z0-9_.]+)\+0x([0-9a-f]+)/0x([0-9a-f]+)`)697	linuxStackFrameRe = regexp.MustCompile(`^ *(?:\[\<?(?:[0-9a-f]+)\>?\] ?){0,2}[ \t]+(?:[0-9]+:)?([a-zA-Z0-9_.]+)\+0x([0-9a-f]+)/0x([0-9a-f]+)`)698	linuxRipFrame     = compile(`N?IP:? (?:(?:[0-9]+:)?(?:{{PC}} +){0,2}{{FUNC}}|[0-9]+:0x[0-9a-f]+|(?:[0-9]+:)?{{PC}} +\[< *\(null\)>\] +\(null\)|[0-9]+: +\(null\))`)699)700var linuxCorruptedTitles = []*regexp.Regexp{701	// Sometimes timestamps get merged into the middle of report description.702	regexp.MustCompile(`\[ *[0-9]+\.[0-9]+\]`),703}704var linuxStackKeywords = []*regexp.Regexp{705	regexp.MustCompile(`Call Trace`),706	regexp.MustCompile(`Allocated:`),707	regexp.MustCompile(`Allocated by task [0-9]+:`),708	regexp.MustCompile(`Freed:`),709	regexp.MustCompile(`Freed by task [0-9]+:`),710	// Match 'backtrace:', but exclude 'stack backtrace:'711	regexp.MustCompile(`[^k] backtrace:`),712}713var linuxStackParams = &stackParams{714	stackStartRes: linuxStackKeywords,715	frameRes: []*regexp.Regexp{716		compile("^ *(?:{{PC}} ){0,2}{{FUNC}}"),717	},718	skipPatterns: []string{719		"__sanitizer",720		"__asan",721		"kasan",722		"__msan",723		"kmsan",724		"check_memory_region",725		"read_word_at_a_time",726		"print_address_description",727		"panic",728		"invalid_op",729		"report_bug",730		"fixup_bug",731		"do_error",732		"invalid_op",733		"_trap",734		"dump_stack",735		"warn_slowpath",736		"warn_alloc",737		"__warn",738		"debug_object",739		"timer_is_static_object",740		"work_is_static_object",741		"lockdep",742		"perf_trace",743		"lock_acquire",744		"lock_release",745		"lock_class",746		"reacquire_held_locks",747		"spin_lock",748		"spin_trylock",749		"spin_unlock",750		"raw_read_lock",751		"raw_read_trylock",752		"raw_write_lock",753		"raw_write_trylock",754		"down",755		"down_read",756		"down_write",757		"down_read_trylock",758		"down_write_trylock",759		"up_read",760		"up_write",761		"mutex_lock",762		"mutex_trylock",763		"mutex_unlock",764		"mutex_remove_waiter",765		"osq_lock",766		"osq_unlock",767		"__wake_up",768		"refcount_add",769		"refcount_sub",770		"refcount_inc",771		"refcount_dec",772		"refcount_set",773		"refcount_read",774		"memcpy",775		"memcmp",776		"memset",777		"memchr",778		"memmove",779		"strcmp",780		"strncmp",781		"strcpy",782		"strlcpy",783		"strncpy",784		"strscpy",785		"strlen",786		"strnstr",787		"strnlen",788		"strchr",789		"copy_to_user",790		"copy_from_user",791		"put_user",792		"get_user",793		"might_fault",794		"might_sleep",795		"list_add",796		"list_del",797		"list_replace",798		"list_move",799		"list_splice",800		"_indirect_thunk_", // retpolines801		"string",802		"pointer",803		"snprintf",804		"scnprintf",805		"kasprintf",806		"kvasprintf",807		"printk",808		"va_format",809		"dev_info",810		"dev_notice",811		"dev_warn",812		"dev_err",813		"dev_alert",814		"dev_crit",815		"dev_emerg",816		"program_check_exception",817		"program_check_common",818		"del_timer",819		"flush_work",820		"__cancel_work_timer",821		"cancel_work_sync",822		"try_to_grab_pending",823		"flush_workqueue",824		"drain_workqueue",825		"destroy_workqueue",826		"finish_wait",827		"kthread_stop",828		"kobject_del",829		"kobject_put",830		"kobject_uevent_env",831		"add_uevent_var",832		"get_device_parent",833		"device_add",834		"device_del",835		"device_unregister",836		"device_destroy",837		"device_release",838		"devres_release_all",839		"hwrng_unregister",840		"i2c_del_adapter",841		"__unregister_client",842		"device_for_each_child",843		"rollback_registered",844		"unregister_netdev",845		"sysfs_remove",846		"device_remove_file",847		"tty_unregister_device",848		"dummy_urb_enqueue",849		"usb_kill_urb",850		"usb_kill_anchored_urbs",851		"usb_control_msg",852		"usb_hcd_submit_urb",853		"usb_submit_urb",854		"^complete$",855		"wait_for_completion",856		"^kfree$",857		"kfree_skb",858	},859	corruptedLines: []*regexp.Regexp{860		// Fault injection stacks are frequently intermixed with crash reports.861		// Note: the actual symbol can have all kinds of weird suffixes like ".isra.7", ".cold" or ".isra.56.cold.74".862		compile(`^( \[\<?(?:0x)?[0-9a-f]+\>?\])? should_fail(slab)?(\.[a-z0-9.]+)?\+0x`),863	},864}865func warningStackFmt(skip ...string) *stackFmt {866	return &stackFmt{867		// In newer kernels WARNING traps and actual stack starts after invalid_op frame,868		// older kernels just print stack.869		parts: []*regexp.Regexp{870			// x86_64 warning stack starts with "RIP:" line,871			// while powerpc64 starts with "--- interrupt:".872			compile("(?:" + linuxRipFrame.String() + "|--- interrupt: [0-9]+ at {{FUNC}})"),873			parseStackTrace,874		},875		parts2: []*regexp.Regexp{876			compile("Call Trace:"),877			parseStackTrace,878		},879		skip: skip,880	}881}882// nolint: lll883var linuxOopses = append([]*oops{884	{885		[]byte("BUG:"),886		[]oopsFormat{887			{888				title:  compile("BUG: KASAN:"),889				report: compile("BUG: KASAN: ([a-z\\-]+) in {{FUNC}}(?:.*\\n)+?.*(Read|Write) of size (?:[0-9]+)"),890				fmt: "KASAN: %[1]v %[3]v in %[4]v",891				stack: &stackFmt{892					parts: []*regexp.Regexp{893						compile("BUG: KASAN: (?:[a-z\\-]+) in {{FUNC}}"),894						compile("Call Trace:"),895						parseStackTrace,896					},897				},898			},899			{900				title:  compile("BUG: KASAN:"),901				report: compile("BUG: KASAN: double-free or invalid-free in {{FUNC}}"),902				fmt:    "KASAN: invalid-free in %[2]v",903				stack: &stackFmt{904					parts: []*regexp.Regexp{905						compile("BUG: KASAN: double-free or invalid-free in {{FUNC}}"),906						compile("Call Trace:"),907						parseStackTrace,908					},909					skip: []string{"kmem_", "slab_", "kfree", "vunmap", "vfree"},910				},911			},912			{913				title: compile("BUG: KASAN: ([a-z\\-]+) on address(?:.*\\n)+?.*(Read|Write) of size ([0-9]+)"),914				fmt:   "KASAN: %[1]v %[2]v",915			},916			{917				title:     compile("BUG: KASAN: (.*)"),918				fmt:       "KASAN: %[1]v",919				corrupted: true,920			},921			{922				title:  compile("BUG: KMSAN: kernel-usb-infoleak"),923				report: compile("BUG: KMSAN: kernel-usb-infoleak in {{FUNC}}"),924				fmt:    "KMSAN: kernel-usb-infoleak in %[2]v",925				stack:  warningStackFmt("usb_submit_urb", "usb_start_wait_urb", "usb_bulk_msg", "usb_interrupt_msg", "usb_control_msg"),926			},927			{928				title:  compile("BUG: KMSAN:"),929				report: compile("BUG: KMSAN: ([a-z\\-]+) in {{FUNC}}"),930				fmt:    "KMSAN: %[1]v in %[3]v",931				stack: &stackFmt{932					parts: []*regexp.Regexp{933						compile("Call Trace:"),934						parseStackTrace,935					},936				},937			},938			{939				title:        compile("BUG: KCSAN:"),940				report:       compile("BUG: KCSAN: (.*)"),941				fmt:          "KCSAN: %[1]v",942				noStackTrace: true,943			},944			{945				title: compile("BUG: (?:unable to handle kernel paging request|unable to handle page fault for address|Unable to handle kernel data access)"),946				fmt:   "BUG: unable to handle kernel paging request in %[1]v",947				stack: &stackFmt{948					parts: []*regexp.Regexp{949						linuxRipFrame,950						compile("Call Trace:"),951						parseStackTrace,952					},953				},954			},955			{956				title: compile("BUG: (?:unable to handle kernel NULL pointer dereference|kernel NULL pointer dereference|Kernel NULL pointer dereference)"),957				fmt:   "BUG: unable to handle kernel NULL pointer dereference in %[1]v",958				stack: &stackFmt{959					parts: []*regexp.Regexp{960						linuxRipFrame,961						compile("Call Trace:"),962						parseStackTrace,963					},964				},965			},966			{967				// Sometimes with such BUG failures, the second part of the header doesn't get printed968				// or gets corrupted, because kernel prints it as two separate printk() calls.969				title:     compile("BUG: (?:unable to handle kernel|Unable to handle kernel)"),970				fmt:       "BUG: unable to handle kernel",971				corrupted: true,972			},973			{974				title: compile("BUG: spinlock (lockup suspected|already unlocked|recursion|bad magic|wrong owner|wrong CPU)"),975				fmt:   "BUG: spinlock %[1]v in %[2]v",976				stack: &stackFmt{977					parts: []*regexp.Regexp{978						compile("Call Trace:"),979						parseStackTrace,980					},981					skip: []string{"spin_"},982				},983			},984			{985				title: compile("BUG: soft lockup"),986				fmt:   "BUG: soft lockup in %[1]v",987				stack: &stackFmt{988					parts: []*regexp.Regexp{989						linuxRipFrame,990						compile("Call Trace:"),991						parseStackTrace,992					},993					extractor: linuxStallFrameExtractor,994				},995			},996			{997				title:  compile("BUG: .*still has locks held!"),998				report: compile("BUG: .*still has locks held!(?:.*\\n)+?.*{{PC}} +{{FUNC}}"),999				fmt:    "BUG: still has locks held in %[1]v",1000			},1001			{1002				title:        compile("BUG: lock held when returning to user space"),1003				report:       compile("BUG: lock held when returning to user space(?:.*\\n)+?.*leaving the kernel with locks still held(?:.*\\n)+?.*at: (?:{{PC}} +)?{{FUNC}}"),1004				fmt:          "BUG: lock held when returning to user space in %[1]v",1005				noStackTrace: true,1006			},1007			{1008				title:  compile("BUG: bad unlock balance detected!"),1009				report: compile("BUG: bad unlock balance detected!(?:.*\\n){0,15}?.*is trying to release lock(?:.*\\n){0,15}?.*{{PC}} +{{FUNC}}"),1010				fmt:    "BUG: bad unlock balance in %[1]v",1011			},1012			{1013				title:  compile("BUG: held lock freed!"),1014				report: compile("BUG: held lock freed!(?:.*\\n)+?.*{{PC}} +{{FUNC}}"),1015				fmt:    "BUG: held lock freed in %[1]v",1016			},1017			{1018				title:        compile("BUG: Bad rss-counter state"),1019				fmt:          "BUG: Bad rss-counter state",1020				noStackTrace: true,1021			},1022			{1023				title:        compile("BUG: non-zero nr_ptes on freeing mm"),1024				fmt:          "BUG: non-zero nr_ptes on freeing mm",1025				noStackTrace: true,1026			},1027			{1028				title:        compile("BUG: non-zero nr_pmds on freeing mm"),1029				fmt:          "BUG: non-zero nr_pmds on freeing mm",1030				noStackTrace: true,1031			},1032			{1033				title: compile("BUG: Dentry .* still in use \\([0-9]+\\) \\[unmount of ([^\\]]+)\\]"),1034				fmt:   "BUG: Dentry still in use [unmount of %[1]v]",1035			},1036			{1037				title: compile("BUG: Bad page state"),1038				fmt:   "BUG: Bad page state",1039			},1040			{1041				title: compile("BUG: Bad page map"),1042				fmt:   "BUG: Bad page map",1043			},1044			{1045				title:        compile("BUG: workqueue lockup"),1046				fmt:          "BUG: workqueue lockup",1047				noStackTrace: true,1048			},1049			{1050				title: compile("BUG: sleeping function called from invalid context at (.*)"),1051				fmt:   "BUG: sleeping function called from invalid context in %[2]v",1052				stack: &stackFmt{1053					parts: []*regexp.Regexp{1054						compile("Call Trace:"),1055						parseStackTrace,1056					},1057				},1058			},1059			{1060				title: compile("BUG: using ([a-z_]+)\\(\\) in preemptible"),1061				fmt:   "BUG: using %[1]v() in preemptible code in %[2]v",1062				stack: &stackFmt{1063					parts: []*regexp.Regexp{1064						compile("Call Trace:"),1065						parseStackTrace,1066					},1067					skip: []string{"dump_stack", "preemption", "preempt", "debug_",1068						"processor_id", "this_cpu"},1069				},1070			},1071			{1072				title: compile("BUG: workqueue leaked lock or atomic"),1073				report: compile("BUG: workqueue leaked lock or atomic(?:.*\\n)+?" +1074					".*last function: ([a-zA-Z0-9_]+)\\n"),1075				fmt:          "BUG: workqueue leaked lock or atomic in %[1]v",1076				noStackTrace: true,1077			},1078			{1079				title: compile("BUG: memory leak"),1080				fmt:   memoryLeakPrefix + "%[1]v",1081				stack: &stackFmt{1082					parts: []*regexp.Regexp{1083						compile("backtrace:"),1084						parseStackTrace,1085					},1086					skip: []string{"kmemleak", "kmalloc", "kcalloc", "kzalloc",1087						"vmalloc", "mmap", "kmem", "slab", "alloc", "create_object",1088						"idr_get", "list_lru_init", "kasprintf", "kvasprintf",1089						"pcpu_create", "strdup", "strndup", "memdup"},1090				},1091			},1092			{// ACHyb1093				title:        compile("BUG: ACHYB ([A-Za-z0-9,/\\:\\_\\>\\-\\(\\)\\s]+)\\n"),1094				report:       compile("BUG: ACHYB ([A-Za-z0-9,/\\:\\_\\>\\-\\(\\)\\s]+)\\n"),1095				// report:       compile("BUG: acl bug: ([A-Za-z0-9,/\\:\\_\\>\\-\\(\\)\\s]+)\\nCall Trace:\\n[A-Za-z0-9|\\-\\_,\\s\\:]+TRACEEND"),1096				fmt:          "BUG: ACHYB %[1]v",1097				noStackTrace: true,1098				// noStackTrace: true,1099				/*stack: &stackFmt{1100					parts: []*regexp.Regexp{1101						compile("Call Trace:\\n[A-Za-z0-9\\-\\_,\\s\\:]+END"),1102					},1103				},*/1104			},1105			{1106				title: compile("BUG: stack guard page was hit at"),1107				fmt:   "BUG: stack guard page was hit in %[1]v",1108				stack: &stackFmt{1109					parts: []*regexp.Regexp{1110						linuxRipFrame,1111					},1112				},1113				noStackTrace: true,1114			},1115			{1116				title:     compile(`BUG:[[:space:]]*(?:\n|$)`),1117				fmt:       "BUG: corrupted",1118				corrupted: true,1119			},1120		},1121		[]*regexp.Regexp{1122			// CONFIG_DEBUG_OBJECTS output.1123			compile("ODEBUG:"),1124			// Android prints this sometimes during boot.1125			compile("Boot_DEBUG:"),1126			compile("xlog_status:"),1127			// Android ART debug output.1128			compile("DEBUG:"),1129			// pkg/host output in debug mode.1130			compile("BUG: no syscalls can create resource"),1131		},1132	},1133	{1134		[]byte("WARNING:"),1135		[]oopsFormat{1136			{1137				title: compile("WARNING: .*lib/debugobjects\\.c.* (?:debug_print|debug_check)"),1138				fmt:   "WARNING: ODEBUG bug in %[1]v",1139				// Skip all users of ODEBUG as well.1140				stack: warningStackFmt("debug_", "rcu", "hrtimer_", "timer_",1141					"work_", "percpu_", "kmem_", "slab_", "kfree", "vunmap",1142					"vfree", "__free_", "debug_check", "kobject_"),1143			},1144			{1145				title: compile("WARNING: .*mm/usercopy\\.c.* usercopy_warn"),1146				fmt:   "WARNING: bad usercopy in %[1]v",1147				stack: warningStackFmt("usercopy", "__check"),1148			},1149			{1150				title: compile("WARNING: .*lib/kobject\\.c.* kobject_"),1151				fmt:   "WARNING: kobject bug in %[1]v",1152				stack: warningStackFmt("kobject_"),1153			},1154			{1155				title: compile("WARNING: .*fs/proc/generic\\.c.* proc_register"),1156				fmt:   "WARNING: proc registration bug in %[1]v",1157				stack: warningStackFmt("proc_"),1158			},1159			{1160				title: compile("WARNING: .*lib/refcount\\.c.* refcount_"),1161				fmt:   "WARNING: refcount bug in %[1]v",1162				stack: warningStackFmt("refcount", "kobject_"),1163			},1164			{1165				title: compile("WARNING: .*kernel/locking/lockdep\\.c.*lock_"),1166				fmt:   "WARNING: locking bug in %[1]v",1167				stack: warningStackFmt("lock_sock", "release_sock"),1168			},1169			{1170				title:        compile("WARNING: lock held when returning to user space"),1171				report:       compile("WARNING: lock held when returning to user space(?:.*\\n)+?.*leaving the kernel with locks still held(?:.*\\n)+?.*at: (?:{{PC}} +)?{{FUNC}}"),1172				fmt:          "WARNING: lock held when returning to user space in %[1]v",1173				noStackTrace: true,1174			},1175			{1176				title: compile("WARNING: .*mm/.*\\.c.* k?.?malloc"),1177				fmt:   "WARNING: kmalloc bug in %[1]v",1178				stack: warningStackFmt("kmalloc", "kcalloc", "kzalloc", "krealloc",1179					"vmalloc", "slab", "kmem"),1180			},1181			{1182				title: compile("WARNING: .* usb_submit_urb"),1183				fmt:   "WARNING in %[1]v/usb_submit_urb",1184				stack: warningStackFmt("usb_submit_urb", "usb_start_wait_urb", "usb_bulk_msg", "usb_interrupt_msg", "usb_control_msg"),1185			},1186			{1187				title: compile("WARNING: .* at {{SRC}} {{FUNC}}"),1188				fmt:   "WARNING in %[3]v",1189				stack: warningStackFmt(),1190			},1191			{1192				title:  compile("WARNING: possible circular locking dependency detected"),1193				report: compile("WARNING: possible circular locking dependency detected(?:.*\\n)+?.*is trying to acquire lock"),1194				fmt:    "possible deadlock in %[1]v",1195				stack: &stackFmt{1196					parts: []*regexp.Regexp{1197						compile("at: (?:{{PC}} +)?{{FUNC}}"),1198						compile("at: (?:{{PC}} +)?{{FUNC}}"),1199						parseStackTrace,1200					},1201					// These workqueue functions take locks associated with work items.1202					// All deadlocks observed in these functions are1203					// work-item-subsystem-related.1204					skip: []string{"process_one_work", "flush_workqueue",1205						"drain_workqueue", "destroy_workqueue"},1206				},1207			},1208			{1209				title:  compile("WARNING: possible irq lock inversion dependency detected"),1210				report: compile("WARNING: possible irq lock inversion dependency detected(?:.*\\n)+?.*just changed the state of lock(?:.*\\n)+?.*at: (?:{{PC}} +)?{{FUNC}}"),1211				fmt:    "possible deadlock in %[1]v",1212			},1213			{1214				title:  compile("WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detecte"),1215				report: compile("WARNING: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected(?:.*\\n)+?.*is trying to acquire(?:.*\\n)+?.*at: (?:{{PC}} +)?{{FUNC}}"),1216				fmt:    "possible deadlock in %[1]v",1217			},1218			{1219				title:  compile("WARNING: possible recursive locking detected"),1220				report: compile("WARNING: possible recursive locking detected(?:.*\\n)+?.*is trying to acquire lock(?:.*\\n)+?.*at: (?:{{PC}} +)?{{FUNC}}"),1221				fmt:    "possible deadlock in %[1]v",1222			},1223			{1224				title:  compile("WARNING: inconsistent lock state"),1225				report: compile("WARNING: inconsistent lock state(?:.*\\n)+?.*takes(?:.*\\n)+?.*at: (?:{{PC}} +)?{{FUNC}}"),1226				fmt:    "inconsistent lock state in %[1]v",1227			},1228			{1229				title:  compile("WARNING: suspicious RCU usage"),1230				report: compile("WARNING: suspicious RCU usage(?:.*\n)+?.*?{{SRC}}"),1231				fmt:    "WARNING: suspicious RCU usage in %[2]v",1232				stack: &stackFmt{1233					parts: []*regexp.Regexp{1234						compile("Call Trace:"),1235						parseStackTrace,1236					},1237					skip: []string{"rcu", "kmem", "slab", "kmalloc",1238						"vmalloc", "kcalloc", "kzalloc"},1239				},1240			},1241			{1242				title:        compile("WARNING: kernel stack regs at [0-9a-f]+ in [^ ]* has bad '([^']+)' value"),1243				fmt:          "WARNING: kernel stack regs has bad '%[1]v' value",1244				noStackTrace: true,1245			},1246			{1247				title:        compile("WARNING: kernel stack frame pointer at [0-9a-f]+ in [^ ]* has bad value"),1248				fmt:          "WARNING: kernel stack frame pointer has bad value",1249				noStackTrace: true,1250			},1251			{1252				title:  compile("WARNING: bad unlock balance detected!"),1253				report: compile("WARNING: bad unlock balance detected!(?:.*\\n){0,15}?.*is trying to release lock(?:.*\\n){0,15}?.*{{PC}} +{{FUNC}}"),1254				fmt:    "WARNING: bad unlock balance in %[1]v",1255			},1256			{1257				title:  compile("WARNING: held lock freed!"),1258				report: compile("WARNING: held lock freed!(?:.*\\n)+?.*at:(?: {{PC}})? +{{FUNC}}"),1259				fmt:    "WARNING: held lock freed in %[1]v",1260			},1261			{1262				title:        compile("WARNING: kernel stack regs .* has bad 'bp' value"),1263				fmt:          "WARNING: kernel stack regs has bad value",1264				noStackTrace: true,1265			},1266			{1267				title:        compile("WARNING: kernel stack frame pointer .* has bad value"),1268				fmt:          "WARNING: kernel stack regs has bad value",1269				noStackTrace: true,1270			},1271			{1272				title:     compile(`WARNING:[[:space:]]*(?:\n|$)`),1273				fmt:       "WARNING: corrupted",1274				corrupted: true,1275			},1276		},1277		[]*regexp.Regexp{1278			compile("WARNING: /etc/ssh/moduli does not exist, using fixed modulus"), // printed by sshd1279			compile("WARNING: workqueue cpumask: online intersect > possible intersect"),1280		},1281	},1282	{1283		[]byte("INFO:"),1284		[]oopsFormat{1285			{1286				title:  compile("INFO: possible circular locking dependency detected"),1287				report: compile("INFO: possible circular locking dependency detected \\](?:.*\\n)+?.*is trying to acquire lock(?:.*\\n)+?.*at: {{PC}} +{{FUNC}}"),1288				fmt:    "possible deadlock in %[1]v",1289			},1290			{1291				title:  compile("INFO: possible irq lock inversion dependency detected"),1292				report: compile("INFO: possible irq lock inversion dependency detected \\](?:.*\\n)+?.*just changed the state of lock(?:.*\\n)+?.*at: {{PC}} +{{FUNC}}"),1293				fmt:    "possible deadlock in %[1]v",1294			},1295			{1296				title:  compile("INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected"),1297				report: compile("INFO: SOFTIRQ-safe -> SOFTIRQ-unsafe lock order detected \\](?:.*\\n)+?.*is trying to acquire(?:.*\\n)+?.*at: {{PC}} +{{FUNC}}"),1298				fmt:    "possible deadlock in %[1]v",1299			},1300			{1301				title:  compile("INFO: possible recursive locking detected"),1302				report: compile("INFO: possible recursive locking detected \\](?:.*\\n)+?.*is trying to acquire lock(?:.*\\n)+?.*at: {{PC}} +{{FUNC}}"),1303				fmt:    "possible deadlock in %[1]v",1304			},1305			{1306				title:  compile("INFO: inconsistent lock state"),1307				report: compile("INFO: inconsistent lock state \\](?:.*\\n)+?.*takes(?:.*\\n)+?.*at: {{PC}} +{{FUNC}}"),1308				fmt:    "inconsistent lock state in %[1]v",1309			},1310			{1311				title: compile("INFO: rcu_(?:preempt|sched|bh) (?:self-)?detected(?: expedited)? stall"),1312				fmt:   "INFO: rcu detected stall in %[1]v",1313				stack: &stackFmt{1314					parts: []*regexp.Regexp{1315						compile("apic_timer_interrupt"),1316						linuxRipFrame,1317						parseStackTrace,1318					},1319					parts2: []*regexp.Regexp{1320						compile("apic_timer_interrupt"),1321						parseStackTrace,1322					},1323					skip:      []string{"apic_timer_interrupt", "rcu"},1324					extractor: linuxStallFrameExtractor,1325				},1326			},1327			{1328				title: compile("INFO: trying to register non-static key"),1329				fmt:   "INFO: trying to register non-static key in %[1]v",1330				stack: &stackFmt{1331					parts: []*regexp.Regexp{1332						compile("Call Trace:"),1333						parseStackTrace,1334					},1335					skip: []string{"stack", "lock", "IRQ"},1336				},1337			},1338			{1339				title:  compile("INFO: suspicious RCU usage"),1340				report: compile("INFO: suspicious RCU usage(?:.*\n)+?.*?{{SRC}}"),1341				fmt:    "INFO: suspicious RCU usage in %[2]v",1342				stack: &stackFmt{1343					parts: []*regexp.Regexp{1344						compile("Call Trace:"),1345						parseStackTrace,1346					},1347					skip: []string{"rcu", "kmem", "slab", "kmalloc",1348						"vmalloc", "kcalloc", "kzalloc"},1349				},1350			},1351			{1352				title: compile("INFO: task .* blocked for more than [0-9]+ seconds"),1353				fmt:   "INFO: task hung in %[1]v",1354				stack: &stackFmt{1355					parts: []*regexp.Regexp{1356						compile("Call Trace:"),1357						parseStackTrace,1358					},1359					extractor: linuxHangTaskFrameExtractor,1360				},1361			},1362			{1363				// This gets captured for corrupted old-style KASAN reports.1364				title:     compile("INFO: (Freed|Allocated) in (.*)"),1365				fmt:       "INFO: %[1]v in %[2]v",1366				corrupted: true,1367			},1368			{1369				title:     compile(`INFO:[[:space:]]*(?:\n|$)`),1370				fmt:       "INFO: corrupted",1371				corrupted: true,1372			},1373		},...

linuxHangTaskFrameExtractor

Using AI Code Generation

1import (2var (3	Config = struct {4	}{}5	RootCmd = &cobra.Command{6		RunE: func(c *cobra.Command, args []string) error {7			return run()8		},9	}10func init() {11	cobra.OnInitialize(initConfig)12	RootCmd.PersistentFlags().StringVar(&Config.ConfigFile, "config", "", "config file (default is $HOME/.dlframework/config.yaml)")13	RootCmd.PersistentFlags().IntVar(&Config.Port, "port", 8080, "port to serve on")14	flags.AddFrameworkFlags(RootCmd.PersistentFlags())15	flags.AddServerFlags(RootCmd.PersistentFlags())16	viper.BindPFlags(RootCmd.PersistentFlags())17}18func initConfig() {19	if Config.ConfigFile != "" {20		viper.SetConfigFile(Config.ConfigFile)21	} else {22		viper.AddConfigPath("$HOME/.dlframework")23		viper.SetConfigName("config")24	}25	viper.SetEnvPrefix("DLFRAMEWORK")26	viper.AutomaticEnv()27	if err := viper.ReadInConfig(); err != nil {28		fmt.Println("Failed to read config file:", err)29		os.Exit(1)30	}31}32func run() error {33	if err := cmd.SetupFramework(); err != nil {34	}35	model, err := local.NewModel(dlframework.ModelManifest{36	}, options.WithModelFramework(dlframework.Framework_KERAS))

linuxHangTaskFrameExtractor

Using AI Code Generation

1import (2func main() {3    rep, err := report.NewReporter(nil, nil)4    if err != nil {5        fmt.Println(err)6    }7    fmt.Println(rep)8    frames, err := rep.ParseLinuxHangTaskFrameExtractor([]byte("BUG: unable to handle kernel paging request at ffff8800f6f0e0009Modules linked in: nvidia(OE) nvidia_modeset nvidia_uvm10FS:  00007f4e4b4d2700(0000) GS:ffff8800f7b00000(0000) knlGS:0000000000000000

linuxHangTaskFrameExtractor

Using AI Code Generation

1import (2func main() {3	file, err := os.Open("hang_1")4	if err != nil {5		log.Fatal(err)6	}7	defer file.Close()8	report, err := profile.Parse(file)9	if err != nil {10		log.Fatal(err)11	}12	stacks, err := report.LinuxHangTaskFrameExtractor()13	if err != nil {14		log.Fatal(err)15	}16	for _, stack := range stacks {17		fmt.Println(stack)18	}19}20runtime/pprof.writeGoroutineStacks(0x7f7a0f5b5e80, 0xc42000c018, 0x0, 0x0)21runtime/pprof.writeGoroutine(0x7f7a0f5b5e80, 0xc42000c018, 0x2, 0x0, 0x0)22runtime/pprof.(*Profile).WriteTo(0x1b6f1e0, 0x7f7a0f5b5e80, 0xc42000c018, 0x2, 0x0, 0x0)23main.main()24goroutine 2 [force gc (idle)]:25runtime.gopark(0x11d8aa0, 0x1b6f4f0, 0x11d1b2c, 0xf, 0x14, 0x1)26runtime.goparkunlock(0x1b6f4f0, 0x11d1

linuxHangTaskFrameExtractor

Using AI Code Generation

1import (2func main() {3    r := report{}4    p := profile.Profile{}5    s := profile.Sample{}6    l := profile.Location{}7    m := profile.Mapping{}8    line := profile.Line{}9    s.Location = append(s.Location, &l)10    l.Line = append(l.Line, &line)11    p.Sample = append(p.Sample, &s)12    p.Mapping = append(p.Mapping, &m)13    f, err := os.Create("stacktrace")14    if err != nil {15        log.Fatal("Cannot create file", err)16    }17    defer f.Close()18    r.linuxHangTaskFrameExtractor(&p, f)19    fmt.Println("Stack trace of the process that is hanging written to a file")20}

linuxHangTaskFrameExtractor

Using AI Code Generation

1import (2func main() {3        report := goreport.NewReport("test.txt")4        report.LinuxHangTaskFrameExtractor()5        fmt.Println(report.HangTaskStackTrace)6}

linuxHangTaskFrameExtractor

Using AI Code Generation

1import (2func main() {3 fmt.Println(string(debug.Stack()))4}5runtime/debug.Stack(0x0, 0x0, 0x0)6main.main()

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