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Vulnerability Change Records for CVE-2023-52630

Change History

CVE Modified by kernel.org 4/30/2024 5:15:06 AM

Action Type Old Value New Value
Changed Description
In the Linux kernel, the following vulnerability has been resolved:

blk-iocost: Fix an UBSAN shift-out-of-bounds warning

When iocg_kick_delay() is called from a CPU different than the one which set
the delay, @now may be in the past of @iocg->delay_at leading to the
following warning:

  UBSAN: shift-out-of-bounds in block/blk-iocost.c:1359:23
  shift exponent 18446744073709 is too large for 64-bit type 'u64' (aka 'unsigned long long')
  Call Trace:

The underflow itself doesn't really affect the behavior in any meaningful
way; however, the past timestamp may exaggerate the delay amount calculated
later in the code, which shouldn't be a material problem given the nature of
the delay mechanism.

If @now is in the past, this CPU is racing another CPU which recently set up
the delay and there's nothing this CPU can contribute w.r.t. the delay.
Let's bail early from iocg_kick_delay() in such cases.
Rejected reason: This CVE ID has been rejected or withdrawn by its CVE Numbering Authority.
Removed Reference
kernel.org https://git.kernel.org/stable/c/1e4d3f8bd880e02932a9ea179f90bfa74fd2e899

Removed Reference
kernel.org https://git.kernel.org/stable/c/27b216130e64651e76ed583742a1b4e4d08a67c3

Removed Reference
kernel.org https://git.kernel.org/stable/c/2a427b49d02995ea4a6ff93a1432c40fa4d36821

Removed Reference
kernel.org https://git.kernel.org/stable/c/9f56f38331171c9a19754004f0664686d67ee48d

Removed Reference
kernel.org https://git.kernel.org/stable/c/cd33b330cb21675189e747953845f5c3689e4912

Removed Reference
kernel.org https://git.kernel.org/stable/c/e5dc63f01e027721c29f82069f7e97e2149fa131


CVE Translated by kernel.org 4/30/2024 5:15:06 AM

Action Type Old Value New Value
Removed Translation
Title: kernel de Linux
Description: En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: blk-iocost: corrige una advertencia de desplazamiento fuera de los límites de UBSAN Cuando se llama a iocg_kick_delay() desde una CPU diferente a la que estableció el retraso, @now puede estar en el pasado de @iocg-&gt;delay_at genera la siguiente advertencia: UBSAN: shift-out-of-bounds in block/blk-iocost.c:1359:23 el exponente de desplazamiento 18446744073709 es demasiado grande para el tipo 'u64' de 64 bits ( también conocido como 'unsigned long long') ... Seguimiento de llamadas:  dump_stack_lvl+0x79/0xc0 __ubsan_handle_shift_out_of_bounds+0x2ab/0x300 iocg_kick_delay+0x222/0x230 ioc_rqos_merge+0x1d7/0x2c0 __rq_qos_merge+0x2c/0x80 bio _intento_back_merge+0x83/0x190 blk_attempt_plug_merge+0x101/ 0x150 blk_mq_submit_bio+0x2b1/0x720 submit_bio_noacct_nocheck+0x320/0x3e0 __swap_writepage+0x2ab/0x9d0 El subdesbordamiento en sí no afecta realmente el comportamiento de ninguna manera significativa; sin embargo, la marca de tiempo anterior puede exagerar la cantidad de retraso calculada más adelante en el código, lo que no debería ser un problema material dada la naturaleza del mecanismo de retraso. Si @now está en el pasado, esta CPU está compitiendo con otra CPU que recientemente configuró el retraso y no hay nada que esta CPU pueda contribuir con el retraso. Salgamos temprano de iocg_kick_delay() en tales casos.


CVE Rejected by kernel.org 4/30/2024 5:15:06 AM

Action Type Old Value New Value