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sdhci: Fix crash caused by M_WAITOK in sdhci dumps
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Authored by bag_semihalf.com on Sep 23 2021, 8:38 AM.
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wma
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rG3ac5012e52ee: sdhci: Fix crash caused by M_WAITOK in sdhci dumps
Summary

In some contexts it is illegal to wait for memory allocation, causing
kernel panic. By default sbuf_new passes M_WAITOK to malloc,
which caused crashes when sdhci_dumpcaps or sdhci_dumpregs was callend in
non sutiable context.

Add SBUF_NOWAIT flag to sbuf_new to fix this.

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rG FreeBSD src repository
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Event Timeline

bag_semihalf.com requested review of this revision.Sep 23 2021, 8:38 AM
bag_semihalf.com created this revision.
This revision was not accepted when it landed; it landed in state Needs Review.Oct 5 2021, 4:24 AM
Closed by commit rG3ac5012e52ee: sdhci: Fix crash caused by M_WAITOK in sdhci dumps (authored by bag_semihalf.com, committed by wma). · Explain Why
This revision was automatically updated to reflect the committed changes.
wma added a commit: rG3ac5012e52ee: sdhci: Fix crash caused by M_WAITOK in sdhci dumps.
Herald added a subscriber: imp. · View Herald TranscriptOct 5 2021, 4:24 AM

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sys/
dev/
sdhci/
12 lines

Diff 96257

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sys/dev/sdhci/sdhci.c

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