- fixed spinlock

a1.2.config

@@ -1,21 +1,20 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 6.1.134 Kernel Configuration
+# Linux/x86 6.1.55 Kernel Configuration
 #
-CONFIG_CC_VERSION_TEXT="gcc (Debian 12.2.0-14) 12.2.0"
+CONFIG_CC_VERSION_TEXT="gcc (Debian 13.2.0-23) 13.2.0"
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=120200
+CONFIG_GCC_VERSION=130200
 CONFIG_CLANG_VERSION=0
 CONFIG_AS_IS_GNU=y
-CONFIG_AS_VERSION=24000
+CONFIG_AS_VERSION=24200
 CONFIG_LD_IS_BFD=y
-CONFIG_LD_VERSION=24000
+CONFIG_LD_VERSION=24200
 CONFIG_LLD_VERSION=0
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_CAN_LINK_STATIC=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
-CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND=y
 CONFIG_CC_HAS_ASM_INLINE=y
 CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
 CONFIG_PAHOLE_VERSION=124
@@ -176,7 +175,7 @@ CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
 CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y
 CONFIG_CC_HAS_INT128=y
 CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
-CONFIG_GCC10_NO_ARRAY_BOUNDS=y
+CONFIG_GCC11_NO_ARRAY_BOUNDS=y
 CONFIG_CC_NO_ARRAY_BOUNDS=y
 CONFIG_ARCH_SUPPORTS_INT128=y
 # CONFIG_NUMA_BALANCING is not set
@@ -429,7 +428,6 @@ CONFIG_X86_INTEL_TSX_MODE_OFF=y
 # CONFIG_X86_INTEL_TSX_MODE_AUTO is not set
 CONFIG_EFI=y
 CONFIG_EFI_STUB=y
-# CONFIG_EFI_HANDOVER_PROTOCOL is not set
 CONFIG_EFI_MIXED=y
 # CONFIG_HZ_100 is not set
 # CONFIG_HZ_250 is not set
@@ -463,7 +461,7 @@ CONFIG_HAVE_LIVEPATCH=y
 
 CONFIG_CC_HAS_SLS=y
 CONFIG_CC_HAS_RETURN_THUNK=y
-# CONFIG_CPU_MITIGATIONS is not set
+# CONFIG_SPECULATION_MITIGATIONS is not set
 CONFIG_ARCH_HAS_ADD_PAGES=y
 CONFIG_ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE=y
 
@@ -620,7 +618,6 @@ CONFIG_AS_AVX512=y
 CONFIG_AS_SHA1_NI=y
 CONFIG_AS_SHA256_NI=y
 CONFIG_AS_TPAUSE=y
-CONFIG_ARCH_CONFIGURES_CPU_MITIGATIONS=y
 
 #
 # General architecture-dependent options
@@ -868,7 +865,6 @@ CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
 CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
-CONFIG_PCP_BATCH_SCALE_MAX=5
 CONFIG_PHYS_ADDR_T_64BIT=y
 CONFIG_MMU_NOTIFIER=y
 # CONFIG_KSM is not set
@@ -1133,6 +1129,7 @@ CONFIG_NET_SCHED=y
 #
 # Queueing/Scheduling
 #
+# CONFIG_NET_SCH_CBQ is not set
 # CONFIG_NET_SCH_HTB is not set
 # CONFIG_NET_SCH_HFSC is not set
 # CONFIG_NET_SCH_PRIO is not set
@@ -1146,6 +1143,7 @@ CONFIG_NET_SCHED=y
 # CONFIG_NET_SCH_ETF is not set
 # CONFIG_NET_SCH_TAPRIO is not set
 # CONFIG_NET_SCH_GRED is not set
+# CONFIG_NET_SCH_DSMARK is not set
 # CONFIG_NET_SCH_NETEM is not set
 # CONFIG_NET_SCH_DRR is not set
 # CONFIG_NET_SCH_MQPRIO is not set
@@ -1286,6 +1284,8 @@ CONFIG_ETHTOOL_NETLINK=y
 #
 # Device Drivers
 #
+CONFIG_HAVE_EISA=y
+# CONFIG_EISA is not set
 CONFIG_HAVE_PCI=y
 CONFIG_PCI=y
 CONFIG_PCI_DOMAINS=y
@@ -1899,6 +1899,9 @@ CONFIG_E1000E_HWTS=y
 # CONFIG_ICE is not set
 # CONFIG_FM10K is not set
 # CONFIG_IGC is not set
+CONFIG_NET_VENDOR_WANGXUN=y
+# CONFIG_NGBE is not set
+# CONFIG_TXGBE is not set
 # CONFIG_JME is not set
 CONFIG_NET_VENDOR_LITEX=y
 CONFIG_NET_VENDOR_MARVELL=y
@@ -2000,9 +2003,6 @@ CONFIG_NET_VENDOR_VERTEXCOM=y
 CONFIG_NET_VENDOR_VIA=y
 # CONFIG_VIA_RHINE is not set
 # CONFIG_VIA_VELOCITY is not set
-CONFIG_NET_VENDOR_WANGXUN=y
-# CONFIG_NGBE is not set
-# CONFIG_TXGBE is not set
 CONFIG_NET_VENDOR_WIZNET=y
 # CONFIG_WIZNET_W5100 is not set
 # CONFIG_WIZNET_W5300 is not set
@@ -2915,6 +2915,7 @@ CONFIG_BCMA_POSSIBLE=y
 # CONFIG_MFD_SM501 is not set
 # CONFIG_MFD_SKY81452 is not set
 # CONFIG_MFD_SYSCON is not set
+# CONFIG_MFD_TI_AM335X_TSCADC is not set
 # CONFIG_MFD_LP3943 is not set
 # CONFIG_MFD_LP8788 is not set
 # CONFIG_MFD_TI_LMU is not set
@@ -3755,9 +3756,9 @@ CONFIG_NVMEM_SYSFS=y
 # CONFIG_PECI is not set
 # CONFIG_HTE is not set
 CONFIG_SST=y
-
+CONFIG_SST_MEMLEAK=y
 # CONFIG_SST_BOUNDS is not set
-# CONFIG_SST_ASYNC_SOURCE is not set
+# CONFIG_SST_LOCKING is not set
 # end of Device Drivers
 
 #
@@ -3944,9 +3945,6 @@ CONFIG_KEYS=y
 # CONFIG_ENCRYPTED_KEYS is not set
 # CONFIG_KEY_DH_OPERATIONS is not set
 # CONFIG_SECURITY_DMESG_RESTRICT is not set
-CONFIG_PROC_MEM_ALWAYS_FORCE=y
-# CONFIG_PROC_MEM_FORCE_PTRACE is not set
-# CONFIG_PROC_MEM_NO_FORCE is not set
 CONFIG_SECURITY=y
 CONFIG_SECURITY_WRITABLE_HOOKS=y
 # CONFIG_SECURITYFS is not set
@@ -4445,7 +4443,7 @@ CONFIG_PTDUMP_CORE=y
 # CONFIG_DEBUG_OBJECTS is not set
 # CONFIG_SHRINKER_DEBUG is not set
 CONFIG_HAVE_DEBUG_KMEMLEAK=y
-CONFIG_DEBUG_KMEMLEAK=y
+# CONFIG_DEBUG_KMEMLEAK is not set
 # CONFIG_DEBUG_STACK_USAGE is not set
 # CONFIG_SCHED_STACK_END_CHECK is not set
 CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE=y

a1.2.txt

@@ -1,10 +0,0 @@
-1) a) um debug beim start des kerns zu aktivieren, reicht kern parameter (mit hilfe -a im unserem skript) zu geben dyndbg=\"module sst_chrdev +p\"
-b) gleiche idee aber statt module zu wählen, kann mann eine file und zeile auswählen wie z.B
-    dyndbg=\"file sst_chrdev.c line 40 +p; file sst_chrdev.c line 72 +p\"
-
-2) Mein grundlegendes Verständnis davon, wie kmemleak funktioniert, ist, dass jede neue Speicherzuweisung und ihre Zeiger zusammen mit einer Vielzahl von Metainformationen wie Größe verfolgt werden.
-   Informationen wie z.B. der Größe verfolgt und in einer Baumstruktur (rbtree) gespeichert wird.
-   einen Memory Allocator existiert, bedeutet dies, dass der Kernel nicht mehr in der Lage ist, ihn zu zerstören und er wird als Orphan bezeichnet.
-
-
-3) um detector standardmäßige auszuschalten, kann mann CONFIG_DEBUG_KMEMLEAK=n setzen oder entfernen im kconfig

a1.4.config

@@ -1,20 +1,21 @@
 #
 # Automatically generated file; DO NOT EDIT.
-# Linux/x86 6.1.55 Kernel Configuration
+# Linux/x86 6.1.134 Kernel Configuration
 #
-CONFIG_CC_VERSION_TEXT="gcc (Debian 13.2.0-23) 13.2.0"
+CONFIG_CC_VERSION_TEXT="gcc (Debian 12.2.0-14) 12.2.0"
 CONFIG_CC_IS_GCC=y
-CONFIG_GCC_VERSION=130200
+CONFIG_GCC_VERSION=120200
 CONFIG_CLANG_VERSION=0
 CONFIG_AS_IS_GNU=y
-CONFIG_AS_VERSION=24200
+CONFIG_AS_VERSION=24000
 CONFIG_LD_IS_BFD=y
-CONFIG_LD_VERSION=24200
+CONFIG_LD_VERSION=24000
 CONFIG_LLD_VERSION=0
 CONFIG_CC_CAN_LINK=y
 CONFIG_CC_CAN_LINK_STATIC=y
 CONFIG_CC_HAS_ASM_GOTO_OUTPUT=y
 CONFIG_CC_HAS_ASM_GOTO_TIED_OUTPUT=y
+CONFIG_GCC_ASM_GOTO_OUTPUT_WORKAROUND=y
 CONFIG_CC_HAS_ASM_INLINE=y
 CONFIG_CC_HAS_NO_PROFILE_FN_ATTR=y
 CONFIG_PAHOLE_VERSION=124
@@ -175,7 +176,7 @@ CONFIG_ARCH_SUPPORTS_NUMA_BALANCING=y
 CONFIG_ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH=y
 CONFIG_CC_HAS_INT128=y
 CONFIG_CC_IMPLICIT_FALLTHROUGH="-Wimplicit-fallthrough=5"
-CONFIG_GCC11_NO_ARRAY_BOUNDS=y
+CONFIG_GCC10_NO_ARRAY_BOUNDS=y
 CONFIG_CC_NO_ARRAY_BOUNDS=y
 CONFIG_ARCH_SUPPORTS_INT128=y
 # CONFIG_NUMA_BALANCING is not set
@@ -280,6 +281,7 @@ CONFIG_X86=y
 CONFIG_INSTRUCTION_DECODER=y
 CONFIG_OUTPUT_FORMAT="elf64-x86-64"
 CONFIG_LOCKDEP_SUPPORT=y
+CONFIG_LOCKDEP=y
 CONFIG_STACKTRACE_SUPPORT=y
 CONFIG_MMU=y
 CONFIG_ARCH_MMAP_RND_BITS_MIN=28
@@ -428,6 +430,7 @@ CONFIG_X86_INTEL_TSX_MODE_OFF=y
 # CONFIG_X86_INTEL_TSX_MODE_AUTO is not set
 CONFIG_EFI=y
 CONFIG_EFI_STUB=y
+# CONFIG_EFI_HANDOVER_PROTOCOL is not set
 CONFIG_EFI_MIXED=y
 # CONFIG_HZ_100 is not set
 # CONFIG_HZ_250 is not set
@@ -461,7 +464,7 @@ CONFIG_HAVE_LIVEPATCH=y
 
 CONFIG_CC_HAS_SLS=y
 CONFIG_CC_HAS_RETURN_THUNK=y
-# CONFIG_SPECULATION_MITIGATIONS is not set
+# CONFIG_CPU_MITIGATIONS is not set
 CONFIG_ARCH_HAS_ADD_PAGES=y
 CONFIG_ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE=y
 
@@ -618,6 +621,7 @@ CONFIG_AS_AVX512=y
 CONFIG_AS_SHA1_NI=y
 CONFIG_AS_SHA256_NI=y
 CONFIG_AS_TPAUSE=y
+CONFIG_ARCH_CONFIGURES_CPU_MITIGATIONS=y
 
 #
 # General architecture-dependent options
@@ -641,6 +645,7 @@ CONFIG_ARCH_CORRECT_STACKTRACE_ON_KRETPROBE=y
 CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
 CONFIG_HAVE_NMI=y
 CONFIG_TRACE_IRQFLAGS_SUPPORT=y
+CONFIG_TRACE_IRQFLAGS=y
 CONFIG_TRACE_IRQFLAGS_NMI_SUPPORT=y
 CONFIG_HAVE_ARCH_TRACEHOOK=y
 CONFIG_HAVE_DMA_CONTIGUOUS=y
@@ -865,6 +870,7 @@ CONFIG_COMPACT_UNEVICTABLE_DEFAULT=1
 CONFIG_PAGE_REPORTING=y
 CONFIG_MIGRATION=y
 CONFIG_ARCH_ENABLE_HUGEPAGE_MIGRATION=y
+CONFIG_PCP_BATCH_SCALE_MAX=5
 CONFIG_PHYS_ADDR_T_64BIT=y
 CONFIG_MMU_NOTIFIER=y
 # CONFIG_KSM is not set
@@ -1129,7 +1135,6 @@ CONFIG_NET_SCHED=y
 #
 # Queueing/Scheduling
 #
-# CONFIG_NET_SCH_CBQ is not set
 # CONFIG_NET_SCH_HTB is not set
 # CONFIG_NET_SCH_HFSC is not set
 # CONFIG_NET_SCH_PRIO is not set
@@ -1143,7 +1148,6 @@ CONFIG_NET_SCHED=y
 # CONFIG_NET_SCH_ETF is not set
 # CONFIG_NET_SCH_TAPRIO is not set
 # CONFIG_NET_SCH_GRED is not set
-# CONFIG_NET_SCH_DSMARK is not set
 # CONFIG_NET_SCH_NETEM is not set
 # CONFIG_NET_SCH_DRR is not set
 # CONFIG_NET_SCH_MQPRIO is not set
@@ -1284,8 +1288,6 @@ CONFIG_ETHTOOL_NETLINK=y
 #
 # Device Drivers
 #
-CONFIG_HAVE_EISA=y
-# CONFIG_EISA is not set
 CONFIG_HAVE_PCI=y
 CONFIG_PCI=y
 CONFIG_PCI_DOMAINS=y
@@ -1899,9 +1901,6 @@ CONFIG_E1000E_HWTS=y
 # CONFIG_ICE is not set
 # CONFIG_FM10K is not set
 # CONFIG_IGC is not set
-CONFIG_NET_VENDOR_WANGXUN=y
-# CONFIG_NGBE is not set
-# CONFIG_TXGBE is not set
 # CONFIG_JME is not set
 CONFIG_NET_VENDOR_LITEX=y
 CONFIG_NET_VENDOR_MARVELL=y
@@ -2003,6 +2002,9 @@ CONFIG_NET_VENDOR_VERTEXCOM=y
 CONFIG_NET_VENDOR_VIA=y
 # CONFIG_VIA_RHINE is not set
 # CONFIG_VIA_VELOCITY is not set
+CONFIG_NET_VENDOR_WANGXUN=y
+# CONFIG_NGBE is not set
+# CONFIG_TXGBE is not set
 CONFIG_NET_VENDOR_WIZNET=y
 # CONFIG_WIZNET_W5100 is not set
 # CONFIG_WIZNET_W5300 is not set
@@ -2915,7 +2917,6 @@ CONFIG_BCMA_POSSIBLE=y
 # CONFIG_MFD_SM501 is not set
 # CONFIG_MFD_SKY81452 is not set
 # CONFIG_MFD_SYSCON is not set
-# CONFIG_MFD_TI_AM335X_TSCADC is not set
 # CONFIG_MFD_LP3943 is not set
 # CONFIG_MFD_LP8788 is not set
 # CONFIG_MFD_TI_LMU is not set
@@ -3945,6 +3946,9 @@ CONFIG_KEYS=y
 # CONFIG_ENCRYPTED_KEYS is not set
 # CONFIG_KEY_DH_OPERATIONS is not set
 # CONFIG_SECURITY_DMESG_RESTRICT is not set
+CONFIG_PROC_MEM_ALWAYS_FORCE=y
+# CONFIG_PROC_MEM_FORCE_PTRACE is not set
+# CONFIG_PROC_MEM_NO_FORCE is not set
 CONFIG_SECURITY=y
 CONFIG_SECURITY_WRITABLE_HOOKS=y
 # CONFIG_SECURITYFS is not set
@@ -4495,14 +4499,15 @@ CONFIG_DEBUG_PREEMPT=y
 # Lock Debugging (spinlocks, mutexes, etc...)
 #
 CONFIG_LOCK_DEBUGGING_SUPPORT=y
-# CONFIG_PROVE_LOCKING is not set
+CONFIG_PROVE_LOCKING=y
+CONFIG_PROVE_RCU=y
 # CONFIG_LOCK_STAT is not set
-# CONFIG_DEBUG_RT_MUTEXES is not set
+CONFIG_DEBUG_RT_MUTEXES=y
-# CONFIG_DEBUG_SPINLOCK is not set
+CONFIG_DEBUG_SPINLOCK=y
-# CONFIG_DEBUG_MUTEXES is not set
+CONFIG_DEBUG_MUTEXES=y
 # CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
 # CONFIG_DEBUG_RWSEMS is not set
-# CONFIG_DEBUG_LOCK_ALLOC is not set
+CONFIG_DEBUG_LOCK_ALLOC=y
 # CONFIG_DEBUG_ATOMIC_SLEEP is not set
 # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
 # CONFIG_LOCK_TORTURE_TEST is not set
@@ -4511,7 +4516,7 @@ CONFIG_LOCK_DEBUGGING_SUPPORT=y
 # CONFIG_CSD_LOCK_WAIT_DEBUG is not set
 # end of Lock Debugging (spinlocks, mutexes, etc...)
 
-# CONFIG_DEBUG_IRQFLAGS is not set
+CONFIG_DEBUG_IRQFLAGS=y
 CONFIG_STACKTRACE=y
 # CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
 # CONFIG_DEBUG_KOBJECT is not set

a1.4.txt

@@ -0,0 +1,2 @@
+1) hardirq_safe bedeutet dass eine prozess läuft in einem Kontext, der sicher für Hardware-Unterbrechungen ist. es halt keine kmalloc, spin_locks...
+2) lockdep_assert_held()

drivers/sst/Makefile

@@ -4,3 +4,6 @@
 #
 
 obj-$(CONFIG_SST)	+= sst_chrdev.o boundedbuffer.o sst_common.o
+CFLAGS_sst_chrdev.o := -DDEBUG
+CFLAGS_sst_common.o := -DDEBUG
+CFLAGS_boundedbuffer.o := -DDEBUG

drivers/sst/sst_chrdev.c

@@ -1,12 +1,9 @@
 #include "sst_internal.h"
-#include "../../include/linux/slab.h"
-
 #include <linux/module.h>
 #include <linux/device.h>
 #include <linux/fs.h>
 #include <linux/uaccess.h>
 #include <linux/cdev.h>
-#include <linux/slab.h>
 
 #define	SST_CHRDEV "the-universe"
 
@@ -33,7 +30,6 @@ static ssize_t universe_read(struct file *file, char __user *buf, size_t count,
 
 	if (sst_consume_answer(sst_info, &answer)) {
 		pr_debug("Cannot read from answers!\n");
-		kfree(answer);
 		return 0;
 	}
 	len = strlen(answer);
@@ -66,11 +62,9 @@ static ssize_t universe_write(struct file *file, const char __user *buf, size_t
 	err = sst_produce_question(sst_info, buf_copy);
 	if (err) {
 		pr_err("Weird! The universe is full.\n");
-		kfree(buf_copy);
 		return -ENOMEM;
 	}
 	sst_debug("Asked the universe a question...\n");
-	kfree(buf_copy);
 	return count;
 }
 

drivers/sst/sst_common.c

@@ -1,4 +1,6 @@
 #include "sst_internal.h"
+#include "../../include/linux/spinlock.h"
+
 #include <linux/delay.h>
 #include <linux/kthread.h>
 #include <linux/random.h>
@@ -82,6 +84,7 @@ static int control_thread_work(void *data) {
 		sst_debug("Randomly sleeping for %d secs. ZzzzZZzz\n", sleep);
 		ssleep(sleep);
 #endif
+		kfree(question);
 	}
 
 	return 0;
@@ -139,7 +142,6 @@ EXPORT_SYMBOL(sst_produce_question);
 int sst_produce_answer(sst_info_t *info, char *value) {
 		int err = 0;
 		unsigned long flags;
-
 		if (!info) {
 			return -1;
 		}
@@ -154,7 +156,6 @@ EXPORT_SYMBOL(sst_produce_answer);
 
 int sst_consume_question(sst_info_t *info, char **value) {
 		int err = 0;
-
 		if (!info) {
 			return -1;
 		}
@@ -169,7 +170,6 @@ EXPORT_SYMBOL(sst_consume_question);
 int sst_consume_answer(sst_info_t *info, char **value) {
 		int err = 0;
 		unsigned long flags;
-
 		if (!info) {
 			return -1;
 		}