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Added support for Linux Kernel v6 in kernelinfo. #1538

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Added support for Linux Kernel v6 in kernelinfo. #1538

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40 changes: 40 additions & 0 deletions panda/plugins/osi_linux/utils/kernelinfo/kernelinfo.c
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Original file line number Diff line number Diff line change
Expand Up @@ -133,6 +133,11 @@ int init_module(void)
struct vfsmount *vfsmount__p;
struct qstr *qstr__p;

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(6, 2, 0))
struct pcpu_hot *pcpu_hot__p;
#endif


task_struct__p = &init_task;
cred__p = &cred__s;
mm_struct__p = init_task.mm;
Expand Down Expand Up @@ -160,11 +165,26 @@ int init_module(void)
#if defined __i386__ || defined __x86_64__
printk(KERN_INFO "task.per_cpu_offsets_addr = %llu\n", (u64)(uintptr_t)&__per_cpu_offset);
printk(KERN_INFO "task.per_cpu_offset_0_addr = %llu\n", (u64)(uintptr_t)__per_cpu_offset[0]);

/**
* In Linux Kernel versions higher than v6.2.0,
* the `current_task` variable has been moved into the `pcpu_hot` structure,
* so a new method is required to obtain its offset.
*/
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0))
printk(KERN_INFO "task.current_task_addr = %llu\n", (u64)(uintptr_t)&current_task);
#else
PRINT_OFFSET(pcpu_hot__p, current_task, "task");
#endif

printk(KERN_INFO "task.init_addr = %llu\n", (u64)(uintptr_t)(task_struct__p));
printk(KERN_INFO "#task.per_cpu_offsets_addr = %08llX\n", (u64)(uintptr_t)&__per_cpu_offset);
printk(KERN_INFO "#task.per_cpu_offset_0_addr = 0x%08llX\n", (u64)(uintptr_t)__per_cpu_offset[0]);
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0))
printk(KERN_INFO "#task.current_task_addr = 0x%08llX\n", (u64)(uintptr_t)&current_task);
#else
printk(KERN_INFO "#task.current_task_addr = 0x%08llX\n", (u64)((void*)&pcpu_hot__p->current_task - (void*)pcpu_hot__p));
#endif
printk(KERN_INFO "#task.init_addr = 0x%08llX\n", (u64)(uintptr_t)task_struct__p);

#else
Expand Down Expand Up @@ -202,7 +222,18 @@ int init_module(void)
PRINT_OFFSET(cred__p, egid, "cred");

PRINT_SIZE(*init_task.mm, "size", "mm");

/**
* Similarly, in Linux Kernel versions higher than v6.2.0,
* the `mmap` member of `mm_struct` has been renamed to `mmap_base`,
* so modifications are needed here.
*/
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0))
PRINT_OFFSET(mm_struct__p, mmap, "mm");
#else
PRINT_OFFSET(mm_struct__p, mmap_base, "mm");
#endif

PRINT_OFFSET(mm_struct__p, pgd, "mm");
PRINT_OFFSET(mm_struct__p, arg_start, "mm");
PRINT_OFFSET(mm_struct__p, start_brk, "mm");
Expand All @@ -213,7 +244,16 @@ int init_module(void)
PRINT_OFFSET(vm_area_struct__p, vm_mm, "vma");
PRINT_OFFSET(vm_area_struct__p, vm_start, "vma");
PRINT_OFFSET(vm_area_struct__p, vm_end, "vma");

/**
* In Linux Kernel versions higher than v6.1.0,
* the `vm_next` member of `vm_area_struct` has been removed.
*/
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 1, 0))
PRINT_OFFSET(vm_area_struct__p, vm_next, "vma");
#else
printk(KERN_INFO "# vma.vm_next_offset = (null)\n");
#endif
PRINT_OFFSET(vm_area_struct__p, vm_flags, "vma");
PRINT_OFFSET(vm_area_struct__p, vm_file, "vma");

Expand Down
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