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authorAdam Buchbinder <abuchbinder@google.com>2014-06-13 14:18:50 -0700
committerDavid Sterba <dsterba@suse.cz>2014-08-22 14:39:34 +0200
commitc9951e2269fb3e3db1546d8627bc34a414ed13bd (patch)
tree97508a459884844af1a2095131a8cdf227808e02 /volumes.h
parent5351d29eef4c26e9ffabc2bae0433407953fd8e0 (diff)
btrfs-progs: Fix undefined behavior in radix-tree.c.
When running with UndefinedBehaviorSanitizer, the tests produce the following error: radix-tree.c:836:30: runtime error: shift exponent 18446744073709551613 is too large for 64-bit type 'unsigned long' (That's a negative shift exponent represented as an unsigned long.) Even though the value is discarded in those cases, it's still undefined behavior; see the C99 standard, section 6.5.7, paragraph three: "If the value of the right operand is negative [...] the behavior is undefined." Signed-off-by: Adam Buchbinder <abuchbinder@google.com> Reviewed-by: Satoru Takeuchi <takeuchi_satoru@jp.fujitsu.com> Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'volumes.h')
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