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Fix potential NULL pointer dereference regression
945b407486
neglected to `NULL` check
`tx->tx_objset`, which is already done in the function. This upset
Coverity, which complained about a "dereference after null check".
Upon inspection, it was found that whenever `dmu_tx_create_dd()` is
called followed by `dmu_tx_assign()`, such as in
`dsl_sync_task_common()`, `tx->tx_objset` will be `NULL`.
Reported-by: Coverity (CID 1527261)
Reviewed-by: Mariusz Zaborski <mariusz.zaborski@klarasystems.com>
Reviewed-by: Youzhong Yang <yyang@mathworks.com>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14170
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@ -1321,7 +1321,7 @@ top_of_function:
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* we want to let it through.
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*/
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if (ignorequota || netfree || dsl_dir_phys(dd)->dd_quota == 0 ||
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(dmu_objset_type(tx->tx_objset) == DMU_OST_ZVOL &&
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(tx->tx_objset && dmu_objset_type(tx->tx_objset) == DMU_OST_ZVOL &&
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zvol_enforce_quotas == B_FALSE))
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quota = UINT64_MAX;
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else
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