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Richard Yao
f9e109223b
Clang's static analyzer reports that if a `blkid == DMU_SPILL_BLKID` is passed, then we can have a NULL pointer dereference when either ->dn_have_spill or `DNODE_FLAG_SPILL_BLKPTR` is not set. This should not happen. We add an `ASSERT()` to suppress reports about NULL pointer dereferences. Originally, I wanted to use one or two IMPLY statements on pre-conditions before the call to `dbuf_findbp()`, but Clang's static analyzer did not understand it. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #14575