fix: probably UB (left shift of neg. val) in ip_tree code#3542
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airween wants to merge 1 commit intoowasp-modsecurity:v2/masterfrom
Open
fix: probably UB (left shift of neg. val) in ip_tree code#3542airween wants to merge 1 commit intoowasp-modsecurity:v2/masterfrom
airween wants to merge 1 commit intoowasp-modsecurity:v2/masterfrom
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Pull request overview
This PR addresses potential undefined behavior in the IP tree bitmask generation used during @ipMatch, by avoiding a left-shift of a negative value.
Changes:
- Update
SHIFT_LEFT_MASK(x)to build the mask by left-shifting an unsigned all-ones value instead of(-1) << x.
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what
This PR fixes a possible undefined behavior (UB) in IP TREE during the execution of
@ipMatch.why
See #3541 for details - same changes for v2.
references