CVE-2026-46255: falha em Linux
dmaengine: fsl-edma: don't explicitly disable clocks in .remove()
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In the Linux kernel, the following vulnerability has been resolved:
dmaengine: fsl-edma: don't explicitly disable clocks in .remove()
The clocks in fsl_edma_engine::muxclk are allocated and enabled with
devm_clk_get_enabled(), which automatically cleans these resources up,
but these clocks are also manually disabled in fsl_edma_remove(). This
causes warnings on driver removal for each clock:
edma_module already disabled
WARNING: CPU: 0 PID: 418 at drivers/clk/clk.c:1200 clk_core_disable+0x198/0x1c8
[...]
Call trace:
clk_core_disable+0x198/0x1c8 (P)
clk_disable+0x34/0x58
fsl_edma_remove+0x74/0xe8 [fsl_edma]
[...]
---[ end trace 0000000000000000 ]---
edma_module already unprepared
WARNING: CPU: 0 PID: 418 at drivers/clk/clk.c:1059 clk_core_unprepare+0x1f8/0x220
[...]
Call trace:
clk_core_unprepare+0x1f8/0x220 (P)
clk_unprepare+0x34/0x58
fsl_edma_remove+0x7c/0xe8 [fsl_edma]
[...]
---[ end trace 0000000000000000 ]---
Fix these warnings by removing the unnecessary fsl_disable_clocks() call
in fsl_edma_remove().
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Referências
https://git.kernel.org/stable/c/533d495f15e4c88ad5246c7f90ae026702e28d75https://git.kernel.org/stable/c/666c53e94c1d0bf0bdf14c49505ece9ddbe725bchttps://git.kernel.org/stable/c/68feac21bd4de7ae4faba05704c404861d991fcfhttps://git.kernel.org/stable/c/b84dba68c4823da452cec99a5d213571a65d06dehttps://git.kernel.org/stable/c/bda244871179543dd3be7d093236cb33b2fb1765