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Fix crash in certain PMEM printf format parsing #5968

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Merged
merged 2 commits into from
Apr 10, 2019

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earlephilhower
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@earlephilhower earlephilhower commented Apr 9, 2019

In some cases the printf implememtation would call an internal puts()
implementation which did not use pgm_read_byte() to access the format
string. In many operating modes this would work, but in interrupts or
you'd get crashes.

Updated newlib to use pgm_read_byte in that one spot and recompiled.

In some cases the printf implememtation would call an internal puts()
implementation which did not use pgm_read_byte() to access the format
string.  In many operating modes this would work, but in interrupts or
when flash was disabled you'd get crashes.

Updated newlib to use pgm_read_byte in that one spot and recompiled.
@earlephilhower earlephilhower requested a review from d-a-v April 9, 2019 21:59
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This fixes DEBUGV() with strings in flash printing parameters :)
Thanks!

@d-a-v d-a-v merged commit fa0db2e into esp8266:master Apr 10, 2019
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TD-er commented Apr 10, 2019

Do you have any idea how long this bug was present?

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d-a-v commented Apr 10, 2019

@TD-er since #5728

@earlephilhower earlephilhower deleted the progmem-printf-fix branch April 10, 2019 15:22
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3 participants