CVE-2023-52582
Vulnerability from cvelistv5
Published
2024-03-02 21:59
Modified
2024-11-04 14:49
Severity ?
Summary
netfs: Only call folio_start_fscache() one time for each folio
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c
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\nnetfs: Only call folio_start_fscache() one time for each folio\n\nIf a network filesystem using netfs implements a clamp_length()\nfunction, it can set subrequest lengths smaller than a page size.\n\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\nset any folios to be written back, we need to make sure we only\ncall folio_start_fscache() once for each folio.\n\nOtherwise, this simple testcase:\n\n  mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\n  dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\n  1+0 records in\n  1+0 records out\n  4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\n  echo 3 \u003e /proc/sys/vm/drop_caches\n  cat /mnt/nfs/file.bin \u003e /dev/null\n\nwill trigger an oops similar to the following:\n\n  page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\n  ------------[ cut here ]------------\n  kernel BUG at include/linux/netfs.h:44!\n  ...\n  CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\n  ...\n  RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\n  ...\n  Call Trace:\n    netfs_rreq_assess+0x497/0x660 [netfs]\n    netfs_subreq_terminated+0x32b/0x610 [netfs]\n    nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\n    nfs_read_completion+0x2f9/0x330 [nfs]\n    rpc_free_task+0x72/0xa0 [sunrpc]\n    rpc_async_release+0x46/0x70 [sunrpc]\n    process_one_work+0x3bd/0x710\n    worker_thread+0x89/0x610\n    kthread+0x181/0x1c0\n    ret_from_fork+0x29/0x50"
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    "dateReserved": "2024-03-02T21:55:42.569Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52582\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-02T22:15:49.770\",\"lastModified\":\"2024-03-04T13:58:23.447\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfs: Only call folio_start_fscache() one time for each folio\\n\\nIf a network filesystem using netfs implements a clamp_length()\\nfunction, it can set subrequest lengths smaller than a page size.\\n\\nWhen we loop through the folios in netfs_rreq_unlock_folios() to\\nset any folios to be written back, we need to make sure we only\\ncall folio_start_fscache() once for each folio.\\n\\nOtherwise, this simple testcase:\\n\\n  mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs\\n  dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count=1\\n  1+0 records in\\n  1+0 records out\\n  4096 bytes (4.1 kB, 4.0 KiB) copied, 0.0126359 s, 324 kB/s\\n  echo 3 \u003e /proc/sys/vm/drop_caches\\n  cat /mnt/nfs/file.bin \u003e /dev/null\\n\\nwill trigger an oops similar to the following:\\n\\n  page dumped because: VM_BUG_ON_FOLIO(folio_test_private_2(folio))\\n  ------------[ cut here ]------------\\n  kernel BUG at include/linux/netfs.h:44!\\n  ...\\n  CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: loaded Not tainted 6.4.0-rc5\\n  ...\\n  RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs]\\n  ...\\n  Call Trace:\\n    netfs_rreq_assess+0x497/0x660 [netfs]\\n    netfs_subreq_terminated+0x32b/0x610 [netfs]\\n    nfs_netfs_read_completion+0x14e/0x1a0 [nfs]\\n    nfs_read_completion+0x2f9/0x330 [nfs]\\n    rpc_free_task+0x72/0xa0 [sunrpc]\\n    rpc_async_release+0x46/0x70 [sunrpc]\\n    process_one_work+0x3bd/0x710\\n    worker_thread+0x89/0x610\\n    kthread+0x181/0x1c0\\n    ret_from_fork+0x29/0x50\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netfs: solo llame a folio_start_fscache() una vez para cada folio. Si un sistema de archivos de red que utiliza netfs implementa una funci\u00f3n abrazadera_longitud(), puede establecer longitudes de subsolicitud m\u00e1s peque\u00f1as que el tama\u00f1o de una p\u00e1gina. Cuando recorremos las publicaciones en netfs_rreq_unlock_folios() para configurar las publicaciones que se reescribir\u00e1n, debemos asegurarnos de llamar solo a folio_start_fscache() una vez para cada publicaci\u00f3n. De lo contrario, este caso de prueba simple: mount -o fsc,rsize=1024,wsize=1024 127.0.0.1:/export /mnt/nfs dd if=/dev/zero of=/mnt/nfs/file.bin bs=4096 count= 1 1+0 registros en 1+0 registros en salida 4096 bytes (4,1 kB, 4,0 KiB) copiados, 0,0126359 s, 324 kB/s echo 3 \u0026gt; /proc/sys/vm/drop_caches cat /mnt/nfs/file.bin \u0026gt; /dev/null desencadenar\u00e1 un error similar al siguiente: p\u00e1gina volcada porque: VM_BUG_ON_FOLIO(folio_test_private_2(folio)) ------------[ cortar aqu\u00ed ]---------- -- \u00a1ERROR del kernel en include/linux/netfs.h:44! ... CPU: 5 PID: 134 Comm: kworker/u16:5 Kdump: cargado No contaminado 6.4.0-rc5 ... RIP: 0010:netfs_rreq_unlock_folios+0x68e/0x730 [netfs] ... Seguimiento de llamadas: netfs_rreq_assess+0x497 /0x660 [netfs] netfs_subreq_terminate+0x32b/0x610 [netfs] nfs_netfs_read_completion+0x14e/0x1a0 [nfs] nfs_read_completion+0x2f9/0x330 [nfs] rpc_free_task+0x72/0xa0 [sunrpc] rpc_a sync_release+0x46/0x70 [sunrpc] proceso_one_work+0x3bd/0x710 hilo_trabajador+0x89/0x610 kthread+0x181/0x1c0 ret_from_fork+0x29/0x50\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/d9f5537479d4ec97ea92ff24e81a517d5772581a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df1c357f25d808e30b216188330e708e09e1a412\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df9950d37df113db59495fa09d060754366a2b7c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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}


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