{
  "id": "CVE-2024-56368",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2025-01-11T13:15:28.530",
  "lastModified": "2025-01-11T13:15:28.530",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Fix overflow in __rb_map_vma\n\nAn overflow occurred when performing the following calculation:\n\n   nr_pages = ((nr_subbufs + 1) << subbuf_order) - pgoff;\n\nAdd a check before the calculation to avoid this problem.\n\nsyzbot reported this as a slab-out-of-bounds in __rb_map_vma:\n\nBUG: KASAN: slab-out-of-bounds in __rb_map_vma+0x9ab/0xae0 kernel/trace/ring_buffer.c:7058\nRead of size 8 at addr ffff8880767dd2b8 by task syz-executor187/5836\n\nCPU: 0 UID: 0 PID: 5836 Comm: syz-executor187 Not tainted 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\nCall Trace:\n <TASK>\n __dump_stack lib/dump_stack.c:94 [inline]\n dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120\n print_address_description mm/kasan/report.c:378 [inline]\n print_report+0xc3/0x620 mm/kasan/report.c:489\n kasan_report+0xd9/0x110 mm/kasan/report.c:602\n __rb_map_vma+0x9ab/0xae0 kernel/trace/ring_buffer.c:7058\n ring_buffer_map+0x56e/0x9b0 kernel/trace/ring_buffer.c:7138\n tracing_buffers_mmap+0xa6/0x120 kernel/trace/trace.c:8482\n call_mmap include/linux/fs.h:2183 [inline]\n mmap_file mm/internal.h:124 [inline]\n __mmap_new_file_vma mm/vma.c:2291 [inline]\n __mmap_new_vma mm/vma.c:2355 [inline]\n __mmap_region+0x1786/0x2670 mm/vma.c:2456\n mmap_region+0x127/0x320 mm/mmap.c:1348\n do_mmap+0xc00/0xfc0 mm/mmap.c:496\n vm_mmap_pgoff+0x1ba/0x360 mm/util.c:580\n ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:542\n __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]\n __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]\n __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\nThe reproducer for this bug is:\n\n------------------------8<-------------------------\n #include <fcntl.h>\n #include <stdlib.h>\n #include <unistd.h>\n #include <asm/types.h>\n #include <sys/mman.h>\n\n int main(int argc, char **argv)\n {\n\tint page_size = getpagesize();\n\tint fd;\n\tvoid *meta;\n\n\tsystem(\"echo 1 > /sys/kernel/tracing/buffer_size_kb\");\n\tfd = open(\"/sys/kernel/tracing/per_cpu/cpu0/trace_pipe_raw\", O_RDONLY);\n\n\tmeta = mmap(NULL, page_size, PROT_READ, MAP_SHARED, fd, page_size * 5);\n }\n------------------------>8-------------------------"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ring-buffer: Corregir desbordamiento en __rb_map_vma Se produjo un desbordamiento al realizar el siguiente c\u00e1lculo: nr_pages = ((nr_subbufs + 1) &lt;&lt; subbuf_order) - pgoff; Agregue una verificaci\u00f3n antes del c\u00e1lculo para evitar este problema. syzbot report\u00f3 esto como un slab-out-of-bounds en __rb_map_vma: ERROR: KASAN: slab-out-of-bounds en __rb_map_vma+0x9ab/0xae0 kernel/trace/ring_buffer.c:7058 Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff8880767dd2b8 por la tarea syz-executor187/5836 CPU: 0 UID: 0 PID: 5836 Comm: syz-executor187 No contaminado 6.13.0-rc2-syzkaller-00159-gf932fb9b4074 #0 Nombre del hardware: Google Google Compute Engine/Google Compute Engine, BIOS Google 25/11/2024 Seguimiento de llamadas:  __dump_stack lib/dump_stack.c:94 [en l\u00ednea] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 imprimir_direcci\u00f3n_descripci\u00f3n mm/kasan/report.c:378 [en l\u00ednea] imprimir_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 __rb_map_vma+0x9ab/0xae0 kernel/trace/ring_buffer.c:7058 mapa_de_buffer_de_anillo+0x56e/0x9b0 kernel/trace/ring_buffer.c:7138 rastreo_buffers_mmap+0xa6/0x120 kernel/trace/trace.c:8482 llamada_mmap include/linux/fs.h:2183 [en l\u00ednea] archivo_mmap mm/internal.h:124 [en l\u00ednea] __mmap_nuevo_archivo_vma mm/vma.c:2291 [en l\u00ednea] __mmap_nuevo_vma mm/vma.c:2355 [en l\u00ednea] __mmap_region+0x1786/0x2670 mm/vma.c:2456 mmap_region+0x127/0x320 mm/mmap.c:1348 do_mmap+0xc00/0xfc0 mm/mmap.c:496 vm_mmap_pgoff+0x1ba/0x360 mm/util.c:580 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:542 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [en l\u00ednea] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [en l\u00ednea] __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f El reproductor de este error es: ------------------------8&lt;-------------------------- #include  #include  #include  #include  #include  int main(int argc, char **argv) { int tama\u00f1o_p\u00e1gina = getpagesize(); int fd; void *meta; system(\"echo 1 &gt; /sys/kernel/tracing/buffer_size_kb\"); fd = open(\"/sys/kernel/tracing/per_cpu/cpu0/trace_pipe_raw\", O_RDONLY); meta = mmap(NULL, tama\u00f1o_p\u00e1gina, PROT_READ, MAP_SHARED, fd, tama\u00f1o_p\u00e1gina * 5); } ------------------------&gt;8-------------------------"
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/c58a812c8e49ad688f94f4b050ad5c5b388fc5d2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ec12f30fe54234dd40ffee50dda8d2df10bd0871",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}