malloc failures
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Authored by will_worrbase.com on Mar 3 2018, 8:36 AM.

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Summary

bsdinstall(8): partedit can hang/crash on read/lseek/malloc failures

This fixes a few problems:

if lseek(2) fails, bootsize underflows to SIZE_T_MAX, making the resulting allocation dangerous
if malloc(3) fails, we end up with a null pointer deref later
if read(2) fails, the installer will hang trying to read(2) boot loader code

Test Plan

Tested via entering the partition editor in bsdinstall

Diff Detail

Repository

rS FreeBSD src repository - subversion

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Lint Passed

Unit

No Test Coverage

Build Status

Buildable 15351
Build 15406: arc lint + arc unit

Event Timeline

will_worrbase.com created this revision.Mar 3 2018, 8:36 AM

Herald added subscribers: Contributor Reviews (src), imp. · View Herald TranscriptMar 3 2018, 8:36 AM

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205806

will_worrbase.com retitled this revision from Replace malloc + read in a loop with mmap to bsdinstall(8): partedit can hang/crash on read/lseek/malloc failures.Mar 3 2018, 8:37 AM

will_worrbase.com edited the summary of this revision. (Show Details)

Revision Contents
Changeset List

Path

Size

usr.sbin/

bsdinstall/

partedit/

gpart_ops.c

24 lines

Diff 39912

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usr.sbin/bsdinstall/partedit/gpart_ops.c

bsdinstall(8): partedit can hang/crash on read/lseek/malloc failuresNeeds ReviewPublicActions