CVE-2023-52638
Vulnerability from cvelistv5
Published
2024-04-03 14:54
Modified
2024-11-04 14:50
Severity ?
Summary
can: j1939: prevent deadlock by changing j1939_socks_lock to rwlock
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52638\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-03T15:15:51.417\",\"lastModified\":\"2024-04-03T17:24:18.150\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: j1939: prevent deadlock by changing j1939_socks_lock to rwlock\\n\\nThe following 3 locks would race against each other, causing the\\ndeadlock situation in the Syzbot bug report:\\n\\n- j1939_socks_lock\\n- active_session_list_lock\\n- sk_session_queue_lock\\n\\nA reasonable fix is to change j1939_socks_lock to an rwlock, since in\\nthe rare situations where a write lock is required for the linked list\\nthat j1939_socks_lock is protecting, the code does not attempt to\\nacquire any more locks. This would break the circular lock dependency,\\nwhere, for example, the current thread already locks j1939_socks_lock\\nand attempts to acquire sk_session_queue_lock, and at the same time,\\nanother thread attempts to acquire j1939_socks_lock while holding\\nsk_session_queue_lock.\\n\\nNOTE: This patch along does not fix the unregister_netdevice bug\\nreported by Syzbot; instead, it solves a deadlock situation to prepare\\nfor one or more further patches to actually fix the Syzbot bug, which\\nappears to be a reference counting problem within the j1939 codebase.\\n\\n[mkl: remove unrelated newline change]\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: j1939: previene el interbloqueo cambiando j1939_socks_lock a rwlock Los siguientes 3 bloqueos competir\u00edan entre s\u00ed, causando la situaci\u00f3n de interbloqueo en el informe de error de Syzbot: - j1939_socks_lock - active_session_list_lock - sk_session_queue_lock A Una soluci\u00f3n razonable es cambiar j1939_socks_lock por un rwlock, ya que en las raras situaciones en las que se requiere un bloqueo de escritura para la lista vinculada que j1939_socks_lock est\u00e1 protegiendo, el c\u00f3digo no intenta adquirir m\u00e1s bloqueos. Esto romper\u00eda la dependencia del bloqueo circular, donde, por ejemplo, el subproceso actual ya bloquea j1939_socks_lock e intenta adquirir sk_session_queue_lock y, al mismo tiempo, otro subproceso intenta adquirir j1939_socks_lock mientras mantiene sk_session_queue_lock. NOTA: Este parche no soluciona el error unregister_netdevice informado por Syzbot; en cambio, resuelve una situaci\u00f3n de punto muerto para prepararse para uno o m\u00e1s parches adicionales para corregir el error Syzbot, que parece ser un problema de conteo de referencias dentro del c\u00f3digo base j1939. [mkl: eliminar cambio de nueva l\u00ednea no relacionado]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/03358aba991668d3bb2c65b3c82aa32c36851170\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/26dfe112ec2e95fe0099681f6aec33da13c2dd8e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/559b6322f9480bff68cfa98d108991e945a4f284\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6cdedc18ba7b9dacc36466e27e3267d201948c8d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aedda066d717a0b4335d7e0a00b2e3a61e40afcf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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