mirror of https://github.com/crytic/slither
commit
e292c67082
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interface Receiver{ |
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function send_funds() payable external; |
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} |
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|
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contract TestWithBug{ |
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|
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mapping(address => uint) balances; |
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|
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modifier nonReentrant(){ |
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_; |
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} |
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|
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function withdraw(uint amount) nonReentrant public{ |
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require(amount <= balances[msg.sender]); |
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Receiver(msg.sender).send_funds{value: amount}(); |
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balances[msg.sender] -= amount; |
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} |
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|
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function withdraw_all() public{ |
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uint amount = balances[msg.sender]; |
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balances[msg.sender] = 0; |
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Receiver(msg.sender).send_funds{value: amount}(); |
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} |
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|
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} |
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|
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|
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contract TestWithoutBug{ |
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|
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mapping(address => uint) balances; |
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|
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modifier nonReentrant(){ |
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_; |
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} |
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|
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function withdraw(uint amount) nonReentrant public{ |
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require(amount <= balances[msg.sender]); |
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Receiver(msg.sender).send_funds{value: amount}(); |
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balances[msg.sender] -= amount; |
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} |
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|
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function withdraw_all() nonReentrant public{ |
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uint amount = balances[msg.sender]; |
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balances[msg.sender] = 0; |
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Receiver(msg.sender).send_funds{value: amount}(); |
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} |
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|
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} |
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|
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contract TestWithBugInternal{ |
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|
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mapping(address => uint) balances; |
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|
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modifier nonReentrant(){ |
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_; |
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} |
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|
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function withdraw(uint amount) nonReentrant public{ |
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withdraw_internal(amount); |
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} |
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|
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function withdraw_internal(uint amount) internal{ |
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require(amount <= balances[msg.sender]); |
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Receiver(msg.sender).send_funds{value: amount}(); |
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balances[msg.sender] -= amount; |
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} |
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|
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function withdraw_all() public{ |
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withdraw_all_internal(); |
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} |
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|
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function withdraw_all_internal() internal { |
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uint amount = balances[msg.sender]; |
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balances[msg.sender] = 0; |
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Receiver(msg.sender).send_funds{value: amount}(); |
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} |
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|
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} |
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|
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contract TestWithoutBugInternal{ |
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|
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mapping(address => uint) balances; |
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|
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modifier nonReentrant(){ |
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_; |
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} |
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|
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function withdraw(uint amount) nonReentrant public{ |
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withdraw_internal(amount); |
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} |
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|
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function withdraw_internal(uint amount) internal{ |
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require(amount <= balances[msg.sender]); |
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Receiver(msg.sender).send_funds{value: amount}(); |
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balances[msg.sender] -= amount; |
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} |
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|
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function withdraw_all() nonReentrant public{ |
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withdraw_all_internal(); |
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} |
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|
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function withdraw_all_internal() internal { |
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uint amount = balances[msg.sender]; |
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balances[msg.sender] = 0; |
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Receiver(msg.sender).send_funds{value: amount}(); |
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} |
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|
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} |
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|
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contract TestBugWithPublicVariable{ |
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|
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mapping(address => uint) public balances; |
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|
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modifier nonReentrant(){ |
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_; |
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} |
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|
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function withdraw(uint amount) nonReentrant public{ |
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withdraw_internal(amount); |
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} |
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|
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function withdraw_internal(uint amount) internal{ |
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require(amount <= balances[msg.sender]); |
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Receiver(msg.sender).send_funds{value: amount}(); |
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balances[msg.sender] -= amount; |
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} |
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|
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} |
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|
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contract TestWithBugNonReentrantRead{ |
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|
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mapping(address => uint) balances; |
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|
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modifier nonReentrant(){ |
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_; |
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} |
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|
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function withdraw(uint amount) nonReentrant public{ |
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require(amount <= balances[msg.sender]); |
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Receiver(msg.sender).send_funds{value: amount}(); |
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balances[msg.sender] -= amount; |
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} |
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|
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// Simulate a reentrancy that allows to read variable in a potential incorrect state during a reentrancy |
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// This is more likely to impact protocol like reentrancy |
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function read() public returns(uint){ |
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uint amount = balances[msg.sender]; |
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return amount; |
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} |
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|
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} |
@ -0,0 +1,981 @@ |
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[ |
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{ |
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"description": "Reentrancy in TestWithBugNonReentrantRead.withdraw(uint256) (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#138-142):\n\tExternal calls:\n\t- Receiver(msg.sender).send_funds{value: amount}() (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#140)\n\tState variables written after the call(s):\n\t- balances[msg.sender] -= amount (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#141)\n\tTestWithBugNonReentrantRead.balances (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#132) can be used in cross function reentrancies:\n\t- TestWithBugNonReentrantRead.read() (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#146-149)\n", |
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"markdown": "Reentrancy in [TestWithBugNonReentrantRead.withdraw(uint256)](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L138-L142):\n\tExternal calls:\n\t- [Receiver(msg.sender).send_funds{value: amount}()](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L140)\n\tState variables written after the call(s):\n\t- [balances[msg.sender] -= amount](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L141)\n\t[TestWithBugNonReentrantRead.balances](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L132) can be used in cross function reentrancies:\n\t- [TestWithBugNonReentrantRead.read()](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L146-L149)\n", |
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"first_markdown_element": "tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L138-L142", |
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"id": "0b2149d8ea8554c24092bad5ce3061d661d4f0447d5d96716893538474bca40f", |
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"check": "reentrancy-eth", |
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"impact": "High", |
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"confidence": "Medium" |
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}, |
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{ |
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"elements": [ |
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{ |
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||||
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"type_specific_fields": { |
||||
"parent": { |
||||
"type": "contract", |
||||
"name": "TestWithBug", |
||||
"source_mapping": { |
||||
"start": 67, |
||||
"length": 506, |
||||
"filename_relative": "tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol", |
||||
"filename_absolute": "/GENERIC_PATH", |
||||
"filename_short": "tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol", |
||||
"is_dependency": false, |
||||
"lines": [ |
||||
5, |
||||
6, |
||||
7, |
||||
8, |
||||
9, |
||||
10, |
||||
11, |
||||
12, |
||||
13, |
||||
14, |
||||
15, |
||||
16, |
||||
17, |
||||
18, |
||||
19, |
||||
20, |
||||
21, |
||||
22, |
||||
23, |
||||
24, |
||||
25 |
||||
], |
||||
"starting_column": 1, |
||||
"ending_column": 2 |
||||
} |
||||
}, |
||||
"signature": "withdraw(uint256)" |
||||
} |
||||
} |
||||
}, |
||||
"additional_fields": { |
||||
"underlying_type": "variables_written", |
||||
"variable_name": "balances" |
||||
} |
||||
} |
||||
], |
||||
"description": "Reentrancy in TestWithBug.withdraw(uint256) (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#13-17):\n\tExternal calls:\n\t- Receiver(msg.sender).send_funds{value: amount}() (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#15)\n\tState variables written after the call(s):\n\t- balances[msg.sender] -= amount (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#16)\n\tTestWithBug.balances (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#7) can be used in cross function reentrancies:\n\t- TestWithBug.withdraw_all() (tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#19-23)\n", |
||||
"markdown": "Reentrancy in [TestWithBug.withdraw(uint256)](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L13-L17):\n\tExternal calls:\n\t- [Receiver(msg.sender).send_funds{value: amount}()](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L15)\n\tState variables written after the call(s):\n\t- [balances[msg.sender] -= amount](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L16)\n\t[TestWithBug.balances](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L7) can be used in cross function reentrancies:\n\t- [TestWithBug.withdraw_all()](tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L19-L23)\n", |
||||
"first_markdown_element": "tests/detectors/reentrancy-eth/0.8.10/reentrancy_with_non_reentrant.sol#L13-L17", |
||||
"id": "bcfa65e776908d618f202fa48f03dde3fbf8397b752d2e8cc3c8e46019e9e174", |
||||
"check": "reentrancy-eth", |
||||
"impact": "High", |
||||
"confidence": "Medium" |
||||
} |
||||
] |
||||
] |
File diff suppressed because one or more lines are too long
@ -0,0 +1,36 @@ |
||||
contract TestReentrant{ |
||||
|
||||
modifier nonReentrant(){ |
||||
_; |
||||
} |
||||
|
||||
function is_reentrant() public{ |
||||
internal_and_could_be_reentrant(); |
||||
internal_and_reentrant(); |
||||
} |
||||
|
||||
function is_non_reentrant() nonReentrant() public{ |
||||
internal_and_could_be_reentrant(); |
||||
internal_and_not_reentrant2(); |
||||
} |
||||
|
||||
function internal_and_not_reentrant() nonReentrant() internal{ |
||||
|
||||
} |
||||
|
||||
function internal_and_not_reentrant2() internal{ |
||||
|
||||
} |
||||
|
||||
// Called by a protected and unprotected function |
||||
function internal_and_could_be_reentrant() internal{ |
||||
|
||||
} |
||||
|
||||
// Called by a protected and unprotected function |
||||
function internal_and_reentrant() internal{ |
||||
|
||||
} |
||||
|
||||
|
||||
} |
Loading…
Reference in new issue