posix: fix possible use after free

[marcinslusarz]

Reported by Coverity. Fallout from f60769a0891a38dd1decdbd28abdd79ec010b9ac.

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This change is 

[codecov[bot]]

Codecov Report

Merging #430 into master will decrease coverage by <.01%. The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #430      +/-   ##
=========================================
- Coverage   76.11%   76.1%   -0.01%     
=========================================
  Files          70      70              
  Lines        8814    8815       +1     
  Branches     1781    1781              
=========================================
  Hits         6709    6709              
  Misses       1610    1610              
- Partials      495     496       +1

Flag	Coverage Δ
#ltp_tests	44.99% <0%> (-0.01%)	:arrow_down:
#sqlite_tests	44.97% <0%> (-0.01%)	:arrow_down:
#tests_antool	15.05% <0%> (-0.01%)	:arrow_down:
#tests_posix_multi_threaded	25.5% <0%> (-0.08%)	:arrow_down:
#tests_posix_single_threaded	53.49% <100%> (ø)	:arrow_up:
#tests_preload	44.51% <0%> (-0.13%)	:arrow_down:

Impacted Files	Coverage Δ
src/libpmemfile-posix/file.c	74.86% <100%> (+0.06%)	:arrow_up:
src/libpmemfile-posix/utils.c	66.66% <0%> (-1.67%)	:arrow_down:
src/libpmemfile-posix/rename.c	90.32% <0%> (-0.81%)	:arrow_down:
src/libpmemfile/path_resolve.c	88.69% <0%> (-0.6%)	:arrow_down:
src/libpmemfile-posix/write.c	84.5% <0%> (-0.47%)	:arrow_down:
src/libpmemfile-posix/data.c	94.9% <0%> (+0.78%)	:arrow_up:
src/libpmemfile-posix/fcntl.c	65.43% <0%> (+2.46%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update d05f760...f3f061c. Read the comment docs.

[codecov[bot]]

Codecov Report

Merging #430 into master will decrease coverage by <.01%. The diff coverage is 100%.

@@            Coverage Diff            @@
##           master    #430      +/-   ##
=========================================
- Coverage   76.11%   76.1%   -0.01%     
=========================================
  Files          70      70              
  Lines        8814    8815       +1     
  Branches     1781    1781              
=========================================
  Hits         6709    6709              
  Misses       1610    1610              
- Partials      495     496       +1

Flag	Coverage Δ
#ltp_tests	44.99% <0%> (-0.01%)	:arrow_down:
#sqlite_tests	44.97% <0%> (-0.01%)	:arrow_down:
#tests_antool	15.05% <0%> (-0.01%)	:arrow_down:
#tests_posix_multi_threaded	25.5% <0%> (-0.08%)	:arrow_down:
#tests_posix_single_threaded	53.49% <100%> (ø)	:arrow_up:
#tests_preload	44.51% <0%> (-0.13%)	:arrow_down:

Impacted Files	Coverage Δ
src/libpmemfile-posix/file.c	74.86% <100%> (+0.06%)	:arrow_up:
src/libpmemfile-posix/utils.c	66.66% <0%> (-1.67%)	:arrow_down:
src/libpmemfile-posix/rename.c	90.32% <0%> (-0.81%)	:arrow_down:
src/libpmemfile/path_resolve.c	88.69% <0%> (-0.6%)	:arrow_down:
src/libpmemfile-posix/write.c	84.5% <0%> (-0.47%)	:arrow_down:
src/libpmemfile-posix/data.c	94.9% <0%> (+0.78%)	:arrow_up:
src/libpmemfile-posix/fcntl.c	65.43% <0%> (+2.46%)	:arrow_up:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update d05f760...f3f061c. Read the comment docs.