Fix possible NULL pointer dereference in GetNamedDSMSegment().
GetNamedDSMSegment() doesn't check whether dsm_attach() returns
NULL, which creates the possibility of a NULL pointer dereference
soon after. To fix, emit an ERROR if dsm_attach() returns NULL.
This shouldn't happen, but it would be nice to avoid a segfault if
it does. In passing, tidy up the surrounding code.
Reported-by: Tom Lane
Reviewed-by: Michael Paquier, Bharath Rupireddy
Discussion: https://postgr.es/m/3348869.1705854106%40sss.pgh.pa.us
Branch
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master
Details
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https://git.postgresql.org/pg/commitdiff/4372adfa24f2f5ddc587317d634b5389bd764106
Modified Files
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src/backend/storage/ipc/dsm_registry.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
