cve-2024-35849
Vulnerability from cvelistv5
Published
2024-05-17 14:47
Modified
2024-11-05 09:23
Severity ?
Summary
btrfs: fix information leak in btrfs_ioctl_logical_to_ino()
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix information leak in btrfs_ioctl_logical_to_ino()\n\nSyzbot reported the following information leak for in\nbtrfs_ioctl_logical_to_ino():\n\n  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n  BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40\n   instrument_copy_to_user include/linux/instrumented.h:114 [inline]\n   _copy_to_user+0xbc/0x110 lib/usercopy.c:40\n   copy_to_user include/linux/uaccess.h:191 [inline]\n   btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499\n   btrfs_ioctl+0x714/0x1260\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:904 [inline]\n   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\n   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\n   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Uninit was created at:\n   __kmalloc_large_node+0x231/0x370 mm/slub.c:3921\n   __do_kmalloc_node mm/slub.c:3954 [inline]\n   __kmalloc_node+0xb07/0x1060 mm/slub.c:3973\n   kmalloc_node include/linux/slab.h:648 [inline]\n   kvmalloc_node+0xc0/0x2d0 mm/util.c:634\n   kvmalloc include/linux/slab.h:766 [inline]\n   init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779\n   btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480\n   btrfs_ioctl+0x714/0x1260\n   vfs_ioctl fs/ioctl.c:51 [inline]\n   __do_sys_ioctl fs/ioctl.c:904 [inline]\n   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\n   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\n   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n  Bytes 40-65535 of 65536 are uninitialized\n  Memory access of size 65536 starts at ffff888045a40000\n\nThis happens, because we\u0027re copying a \u0027struct btrfs_data_container\u0027 back\nto user-space. This btrfs_data_container is allocated in\n\u0027init_data_container()\u0027 via kvmalloc(), which does not zero-fill the\nmemory.\n\nFix this by using kvzalloc() which zeroes out the memory on allocation."
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    "dateReserved": "2024-05-17T13:50:33.105Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-35849\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-17T15:15:21.777\",\"lastModified\":\"2024-11-05T10:16:44.527\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: fix information leak in btrfs_ioctl_logical_to_ino()\\n\\nSyzbot reported the following information leak for in\\nbtrfs_ioctl_logical_to_ino():\\n\\n  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\n  BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40\\n   instrument_copy_to_user include/linux/instrumented.h:114 [inline]\\n   _copy_to_user+0xbc/0x110 lib/usercopy.c:40\\n   copy_to_user include/linux/uaccess.h:191 [inline]\\n   btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499\\n   btrfs_ioctl+0x714/0x1260\\n   vfs_ioctl fs/ioctl.c:51 [inline]\\n   __do_sys_ioctl fs/ioctl.c:904 [inline]\\n   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\\n   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\\n   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\n  Uninit was created at:\\n   __kmalloc_large_node+0x231/0x370 mm/slub.c:3921\\n   __do_kmalloc_node mm/slub.c:3954 [inline]\\n   __kmalloc_node+0xb07/0x1060 mm/slub.c:3973\\n   kmalloc_node include/linux/slab.h:648 [inline]\\n   kvmalloc_node+0xc0/0x2d0 mm/util.c:634\\n   kvmalloc include/linux/slab.h:766 [inline]\\n   init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779\\n   btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480\\n   btrfs_ioctl+0x714/0x1260\\n   vfs_ioctl fs/ioctl.c:51 [inline]\\n   __do_sys_ioctl fs/ioctl.c:904 [inline]\\n   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890\\n   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890\\n   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17\\n   do_syscall_x64 arch/x86/entry/common.c:52 [inline]\\n   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83\\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\\n\\n  Bytes 40-65535 of 65536 are uninitialized\\n  Memory access of size 65536 starts at ffff888045a40000\\n\\nThis happens, because we\u0027re copying a \u0027struct btrfs_data_container\u0027 back\\nto user-space. This btrfs_data_container is allocated in\\n\u0027init_data_container()\u0027 via kvmalloc(), which does not zero-fill the\\nmemory.\\n\\nFix this by using kvzalloc() which zeroes out the memory on allocation.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: btrfs: corrige la fuga de informaci\u00f3n en btrfs_ioctl_logic_to_ino() Syzbot inform\u00f3 la siguiente fuga de informaci\u00f3n en btrfs_ioctl_logic_to_ino(): ERROR: KMSAN: kernel-infoleak en instrument_copy_to_user include/linux/instrumented.h: 114 [en l\u00ednea] ERROR: KMSAN: kernel-infoleak en _copy_to_user+0xbc/0x110 lib/usercopy.c:40 instrument_copy_to_user include/linux/instrumented.h:114 [en l\u00ednea] _copy_to_user+0xbc/0x110 lib/usercopy.c:40 copy_to_user include/linux/uaccess.h:191 [en l\u00ednea] btrfs_ioctl_logic_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499 btrfs_ioctl+0x714/0x1260 vfs_ioctl fs/ioctl.c:51 [en l\u00ednea] __do_sys_ioctl fs/ioctl.c :904 [en l\u00ednea] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890 x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h: 17 do_syscall_x64 arco/ x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit se cre\u00f3 en: __kmalloc_large_node+0x231/0x370 mm/slub.c:3921 __do_kmalloc_node mm/slub.c:3954 [en l\u00ednea] __kmalloc_node+0xb07/0x1060 mm/slub.c:3973 kmalloc_node include/linux/slab.h:648 [en l\u00ednea] kvmalloc_node+0xc0/0x2d0 mm/util.c:634 kvmalloc incluye /linux/slab.h:766 [en l\u00ednea] init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779 btrfs_ioctl_logic_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480 btrfs_ioctl+0x714/0x1260 ctl fs/ioctl.c :51 [en l\u00ednea] __do_sys_ioctl fs/ioctl.c:904 [en l\u00ednea] __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890 x64_sys_call+0x1883/0x Arco 3b50/x86/incluye /generated/asm/syscalls_64.h:17 do_syscall_x64 arch/x86/entry/common.c:52 [en l\u00ednea] do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f Bytes 40-65535 de 65536 no est\u00e1n inicializados El acceso a la memoria de tama\u00f1o 65536 comienza en ffff888045a40000. Esto sucede porque estamos copiando una \u0027estructura btrfs_data_container\u0027 nuevamente al espacio de usuario. Este btrfs_data_container se asigna en \u0027init_data_container()\u0027 a trav\u00e9s de kvmalloc(), que no llena la memoria con ceros. Solucione este problema usando kvzalloc() que pone a cero la memoria al asignarla.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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