vfs_register: prevent kernel crash
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Authored by netchild on Sat, Sep 19, 10:20 AM.

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imp

olce

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kib
rmacklem
olce

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rG3897678132e7: vfs_register: prevent kernel crash

Summary

vfs_register hashes the filesystem name and uses it for sysctl oids.
A filesystem name which hashes to 0 crashes in sysctl_register_oid().

Map 0 to 1 to prevent the kernel crash.

This can be tested with "udf2" as the filesystem name.

MFC after: 1 month
MFC to: stable/15 stable/14

Diff Detail

Repository

rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

netchild created this revision.Sat, Sep 19, 10:20 AM

Herald added subscribers: olce, imp. · View Herald TranscriptSat, Sep 19, 10:20 AM

netchild requested review of this revision.Sat, Sep 19, 10:20 AM

Harbormaster completed remote builds in B77087: Diff 187213.Sat, Sep 19, 10:20 AM

kib accepted this revision.Sat, Sep 19, 10:33 AM

This revision is now accepted and ready to land.Sat, Sep 19, 10:33 AM

Closed by commit rG3897678132e7: vfs_register: prevent kernel crash (authored by netchild). · Explain WhyWed, Sep 23, 12:48 PM

This revision was automatically updated to reflect the committed changes.

netchild added a commit: rG3897678132e7: vfs_register: prevent kernel crash.

Herald added a reviewer: olce. · View Herald TranscriptWed, Sep 23, 12:48 PM

Revision Contents
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Path

Size

sys/

kern/

vfs_init.c

2 lines

Diff 187499

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vfs_register: prevent kernel crashClosedPublicActions