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radareorg / radare2

UNIX-like reverse engineering framework and command-line toolset
https://www.radare.org/
GNU Lesser General Public License v3.0
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pxo segfaults #273

Closed jvoisin closed 11 years ago

jvoisin commented 11 years ago 
$ cat test.c
int main(){
  puts("Hello\n");
}
$ gcc test.c
$ r2 ./a.out 
[0x08048337]> pxo sym.main
zsh: segmentation fault  r2 ./a.out
earada commented 11 years ago

I cannot reproduce the segfault. Can you test it again or provide more information about the SO and environment?

Anyway, the command's syntax is:

pxo [len]

So you are going to print 0x8048337 characters.

Are you looking for this one?

pxo @ sym.main
jvoisin commented 11 years ago

It segfaults on every "large" number.

Here is the ziped binary in base64.

UEsDBBQDAAAIAKhhUUM9R0Fs+wsAALwdAAAFAAAAYS5vdXTtWXlMI2UU/6YtOLqlVBdXFlAbLboa
qLCiomKky+GuIiKwGs+xtAOtW1psp7p4xKPiUpGEGBM18cAjmhivRGOMJ4juukYTPGI0Go94sV7x
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sZ+oFMWESa4AB+LDAJIi9LkgTkivBLnSJZOsBIboNkkXPjCWpK5ECIg+XngNu1wKud0lk9RIsEOK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8AKbxnr9Verhe9OZwK5vQvd2yw7ZeHp9/rSeuRfQfeVMG7Zt9suqsbi/bvwRd55K+Gs+P56V0Txk
6/TvjpGd2sHGPhlr9TfmavyIKKPZQJHzNzxJxOw26eifMu9nn68661zlnJkvSiasx/czfE3q0SO+
vg9fhJz6/yGHOAM6CclAUvx/ox8Sh4QgA9wXg6QhxzCOQM6H9EHWQhQel2Q/CvNVSNjiX4NsgPQw
p5psHG8PiGDdC4la4vrYT5TzipNw/0V6H/NYa5xLnHNIWOaWYtsg96k8jxaO2w4JWPLpYX4N8wfY
h8qiFWJzXG63cf6dfH+yDhKEnMm2To6TsPgxj0rIWZB6yLGQwyENnHOAz4M9Rg/PoZvicLwO5vh4
TMDiu4797cGCw7IeeK6Muea8Fpaf7xDbwpBN3Hcwc2shKusw6wzrFGuN+WYuJ5Bvlgj7i/M4M0bg
b/K356SavjhWNdsW40Jz7UJ/EfcYm480t+31SXA+msnf5b6AzbbupErnsc3Qu0E+/imfPxv6gp/z
+Sug74eehP4Kegp6zS/5/AfQb+ACIiSsN2z3Jugy09fF3UK6VJYq3S7XqGTkUgW5An4niOCR2z3u
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PT+b7Tfh81PITkgxnv9XQQ6CHAlph5i8E1pajvGt2diXSWiZwzpiiVAq6WsINAbqa+vrMnrv4YcY
HbugHhU4vPYog7kWTMJCBNLDg1qoD1pLGTpqtvDUp6aGRCCR1NRAcN2GWi00wGggkQn0ZWJ42o5F
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VSUaSS0iY4QSSqVCw8YIs31+OKUnERqMhRE4qek/RhTDY186LQLh5OCgmtDEPz4qeY06BL9nAVhp
sUusD4TspvP4fQgMPgvPxbrewhsFbxQ8/zK8VshOrDfi0Vq/n/0VmTyWTl7vDt4DL4M3ye87JOZ4
IafxPnDwnomjsWWZeZwLyXNcWus/oFFmietg2UT7g3m0R2Q4b7bFpeNifm/i4D223gm+bR6EsyaP
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2yzrpRG8RvDudv6Zd0+Bx+/HVhjn3M571MLzXYd3gG7kJP2Z9wzEo59jfl9WyjYb7yVIKfPc4Ll3
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n3kN4DV42WZb979xu44x8TZaeSx7si/zyIFXLNn8sXZYeM2rhHgYgfdFu9ayL3e3+fumAvvYYfO3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GRhQNWUorGjRTGJToG+zoDtaM4RKQP+S09y8+PGFPds+7SwyGoR+/86fehb712LMonf7Bx/Y0kkl
ik9HSM3+bSmF7iUp2D8f2Y1cA6qaMErJQfuHlOhF4s/+cAvPFHK3+DVrCevEC5VurmRLPJROYy3p
k1Q2qXT2UV0+k3rZly+6nhKKjsKFUuIPUEsBAj8DFAMAAAgAqGFRQz1HQWz7CwAAvB0AAAUAAAAA
AAAAAAAggO2BAAAAAGEub3V0UEsFBgAAAAABAAEAMwAAAB4MAAAAAA==

Steps to reproduce:

$ r2 ./a.out
[0x08048450]> pxo 123456789
zsh: segmentation fault  r2 ./a.out
$
radare commented 11 years ago

The argument you are passing is the length, not the offset. Last commit should fix that. Please verify

On Oct 17, 2013, at 13:16, jvoisin notifications@github.com wrote:

It should be precised in the documentation :<

But it segfaults on every "large" number.

Here is the ziped binary in base64.

UEsDBBQDAAAIAKhhUUM9R0Fs+wsAALwdAAAFAAAAYS5vdXTtWXlMI2UU/6YtOLqlVBdXFlAbLboa qLCiomKky+GuIiKwGs+xtAOtW1psp7p4xKPiUpGEGBM18cAjmhivRGOMJ4juukYTPGI0Go94sV7x XFHR+nszb8owsmr80zjk9X2/7/2+99735vuGOS5v62iXJEmYh0M4BaGuq11yA/TEnkZ/g/CJ3cUa sZ+oFMWESa4AB+LDAJIi9LkgTkivBLnSJZOsBIboNkkXPjCWpK5ECIg+XngNu1wKud0lk9RIsEOK 2e6AKiuFwEYyBwzR7S6WqARBbJJWYEjB1vWJFnl3hRDvjrlkErv9VNiF/WD/Xkg37Nb85tEHKczv sHis77B4pDYeS2Q2B9LJwFrD5mX7CZ0bjVqzz3IeWwZxsn3rHdGWuYMr77t1hesq9cC+4lucV5cS f3fdB9fKhz/ue+Ckj6bs+R5qae9Fedlwsw2facHk2G+zr7fhahuusOEVkKZRl0xz21OgYKhLmOpx pFA2nKKktUgsoWTSakSkVS2eDIfiqkinQomI0GKDqlDACIU3KeHoJqU/FIuLi4ZSsYTWDwM5ImtK UwZDsQR6BgaTCe5RxAkdG9a1KGtRd7PVUGjVmavcRZr/JCHxuvea+cdiJQKcGPeVEQYnzdgLTOMv Y/4C1kExXLonXfJuEuykHRhH2olzTBr2KtJFqC/pYtSY9G5CrCEtC9GT/VKe+wwOr5wZqBJiLLuQ z+dHprSiuW50Zp+Xz5oR1iN/hAsj89UyfnVcTRlEqbnjgzyOai9hmfCsjssIewlP6biccDnhh3Vc RdhHeFLHPsJrCE/o2E+4jvAVOl5DuJHwEGD9V+fmPsx+/E1Xb3fUNwrLw1tc8qmnRV3XYJ8+BMIP /RPWv7Eq/4wVP34U3NU24Cc7X3yRNPO4wIH579yY+yT7Zfk2l59s+dntM+OPkenxBpM/Pe/IPTf9 +f7S7KvzGWnmCX3ga+bAXKvfZQ5+bftMbuf4Uwfrl6DjqEtkVoJGpb8UKW4toj5p+/fI7A4vTizi 728msqqQCCyUyI5hDJnYkcYv+3jr93w+N/3E/iNfnJp78afPp39x5l6cnt//kOdys9MfOKTZ8bIR cibNHjKdeyk3m50KbZ/Rh3q3tc0X7S3EF3uPtc1Pf1CUew5aws+CNJtrmx9rk8e7pNxGufQxUfrM VK5tIXvZgsi8DhI7KAcl5/LPPYhkeMbNoyh8MTJC+w1q//Kb3o7k0P4abX0ozlj2S596B12CMLCq fmobhr8BDqjFdH1dCRdbYRHoENRxPcZSrJcMf2+Rv9uMdte1aMNO7XepfQ3ac+/Bw2irf+/Sx/CD /DlB7xgIKhGeNgiriLDKRmglwi0GYR8i7GMjHEiESwxCORHKbQQHEc40CKuJsNpG+HABhKMNQgUR KmyEKRD05JvSmWY9ySY1c5SeTFM4E9CDNmUy1brzplSmSnfSpGVWjmMQ1ep0eNcX0herqYud95Lz 8AKbxnr9Verhe9OZwK5vQvd2yw7ZeHp9/rSeuRfQfeVMG7Zt9suqsbi/bvwRd55K+Gs+P56V0Txk 6/TvjpGd2sHGPhlr9TfmavyIKKPZQJHzNzxJxOw26eifMu9nn68661zlnJkvSiasx/czfE3q0SO+ vg9fhJz6/yGHOAM6CclAUvx/ox8Sh4QgA9wXg6QhxzCOQM6H9EHWQhQel2Q/CvNVSNjiX4NsgPQw p5psHG8PiGDdC4la4vrYT5TzipNw/0V6H/NYa5xLnHNIWOaWYtsg96k8jxaO2w4JWPLpYX4N8wfY h8qiFWJzXG63cf6dfH+yDhKEnMm2To6TsPgxj0rIWZB6yLGQwyENnHOAz4M9Rg/PoZvicLwO5vh4 TMDiu4797cGCw7IeeK6Muea8Fpaf7xDbwpBN3Hcwc2shKusw6wzrFGuN+WYuJ5Bvlgj7i/M4M0bg b/K356SavjhWNdsW40Jz7UJ/EfcYm480t+31SXA+msnf5b6AzbbupErnsc3Qu0E+/imfPxv6gp/z +Sug74eehP4Kegp6zS/5/AfQb+ACIiSsN2z3Jugy09fF3UK6VJYq3S7XqGTkUgW5An4niOCR2z3u E0tXaK7N4viKYw9d6z+A7BR/x3w+fyxxgh55xLGupOiiF+DFGH8exIUcglb7ZYt2yrX6512Pn6QY sN8pWezO2yRiNKKL5vYy5hYqjA963FucLR7vNa6gpyxb1Ompc6z3lAVnPN7gVo87uM0jB1/wuLyg L0AE6uEQ/x//9cM3grtAEsszqhsykXXJJdB+3DqtFsYzXyU/r1UQB7iK8Y+/55P343mziPb7VXge oLUHTPtxCz8PeSF7c0wn/eBO08H7pAyyJ2QfSBfiUns99F4UF7KSNW4ikjL689CU5zfQPyCe+BcH PT+b7Tfh81PITkgxnv9XQQ6CHAlph5i8E1pajvGt2diXSWiZwzpiiVAq6WsINAbqa+vrMnrv4YcY HbugHhU4vPYog7kWTMJCBNLDg1qoD1pLGTpqtvDUp6aGRCCR1NRAcN2GWi00wGggkQn0ZWJ42o5F hI6ioXRUBCLDCfjTNbwYlgvVVDqWTCwBCmwpNU48ozEU1yhgDL+auhm//QAwJSMhLSQCalTpT4UG VSUaSS0iY4QSSqVCw8YIs31+OKUnERqMhRE4qek/RhTDY186LQLh5OCgmtDEPz4qeY06BL9nAVhp sUusD4TspvP4fQgMPgvPxbrewhsFbxQ8/zK8VshOrDfi0Vq/n/0VmTyWTl7vDt4DL4M3ye87JOZ4 IafxPnDwnomjsWWZeZwLyXNcWus/oFFmietg2UT7g3m0R2Q4b7bFpeNifm/i4D223gm+bR6EsyaP 92QX+WOe28K7jv0X8zVjArwDl6nfFgtvCrwpJ/gWnpe515s8fhfXhc7XnBYe65tMHl+j/DLqskzc 2yzrpRG8RvDudv6Zd0+Bx+/HVhjn3M571MLzXYd3gG7kJP2Z9wzEo59jfl9WyjYb7yVIKfPc4Ll3 wXuT4jLPC553F7x3qCY6j98TlvI7Qtv5/djibwG8Bbs/lh3MM6/ZdAJqluF9Z+HVgFcDnrxMfvMU n3kN4DV42WZb979xu44x8TZaeSx7si/zyIFXLNn8sXZYeM2rhHgYgfdFu9ayL3e3+fumAvvYYfO3 3MHXI9JOZkVNzJFHTcwR7jcxV+BlE/NujF/FmM/eDwW8m47lLGOu9PoC3l3HXSbmO+OJAl6h46kC dhv8q01cQor2FWOPjhsLuJQU9glj3pXYD4xxVox1z3gvHbtNzFdsr4l555aZmO8UFgp4lY7FpIn3 0WFNAZfruKGAVwvLAVwhpCVr8du82xJfQnwaMcHzd2D+AaqPBQepMbKIT+d4+jrE6H7L/CTMb5zq YeHfbKmHhHo8bsvHnt+zNL9x5qOer9jyFTb+25b4Av4/t9RTQj2/5/hsN/bIJNtRzypgem/pICvy rbEk5IOsB74C9XCR3VEizpUW6+9D/WPSYv29wEPGeI6GsRKvJx17xDU2+53Ao6hXkOPfa7M/wfFM /9ts+b0JXMf2PR3l4iNp6Tv472z+nI6l2AdMr2xDHL8OuLEQb7U4wsH7g+1NZLf4b7H56wFusIxX gOldMOapj4/Y+MPA1vmMA29HPY7leDeyP3N+d9n4TwPz/gZ/hZgBPtkyXoRTWlrL9PcHwkJRTmzp Vjo29PQqioioKXUglsaNpqINKuF4MqGmxZ+7MCiSVAbiyb5QXIloyVRaCWU2C9y/DcVVTY0Ejjyy rnF5krJ4X6jgXi81LIw7yUhmcHAYQyxIAVNbQqXPHHrK7d3Bk9uUts5WReEJcHvpmIhQWs/oDJ68 oWWpRf9EIpQTOk5ZF+xQTmlv72nrVXqD6zraFPO7Sjid0VPFR5rek5XFuvSe3EIl6A31xVVwNzce GRhQNWUorGjRTGJToG+zoDtaM4RKQP+S09y8+PGFPds+7SwyGoR+/86fehb712LMonf7Bx/Y0kkl ik9HSM3+bSmF7iUp2D8f2Y1cA6qaMErJQfuHlOhF4s/+cAvPFHK3+DVrCevEC5VurmRLPJROYy3p k1Q2qXT2UV0+k3rZly+6nhKKjsKFUuIPUEsBAj8DFAMAAAgAqGFRQz1HQWz7CwAAvB0AAAUAAAAA AAAAAAAggO2BAAAAAGEub3V0UEsFBgAAAAABAAEAMwAAAB4MAAAAAA== Steps to reproduce:

$ r2 ./a.out [0x08048450]> pxo 123456789 zsh: segmentation fault r2 ./a.out $ — Reply to this email directly or view it on GitHub.

jvoisin commented 11 years ago

Latest git: 5ff25ef Still segfaulting.