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[sanitizer] Handle SIOCGIFCONF ioctl.

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llvm-svn: 183529
This commit is contained in:
Evgeniy Stepanov 2013-06-07 15:49:38 +00:00
parent 931bb768fd
commit cead69d4a3
4 changed files with 61 additions and 5 deletions
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33
compiler-rt/lib/msan/lit_tests/ioctl_custom.cc Normal file
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@ -0,0 +1,33 @@
// RUN: %clangxx_msan -m64 -O0 -g %s -o %t && %t
// RUN: %clangxx_msan -m64 -O3 -g %s -o %t && %t
// RUN: %clangxx_msan -DPOSITIVE -m64 -O0 -g %s -o %t && %t 2>&1 | FileCheck %s
// RUN: %clangxx_msan -DPOSITIVE -m64 -O3 -g %s -o %t && %t 2>&1 | FileCheck %s
#include <assert.h>
#include <stdlib.h>
#include <net/if.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <unistd.h>
int main(int argc, char **argv) {
int fd = socket(AF_INET, SOCK_STREAM, 0);
struct ifreq ifreqs[20];
struct ifconf ifc;
ifc.ifc_ifcu.ifcu_req = ifreqs;
#ifndef POSITIVE
ifc.ifc_len = sizeof(ifreqs);
#endif
int res = ioctl(fd, SIOCGIFCONF, (void *)&ifc);
// CHECK: UMR in ioctl{{.*}} at offset 0
// CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
// CHECK: #{{.*}} in main {{.*}}ioctl_custom.cc:[[@LINE-3]]
assert(res == 0);
for (int i = 0; i < ifc.ifc_len / sizeof(*ifc.ifc_ifcu.ifcu_req); ++i)
printf("%d %zu %s\n", i, strlen(ifreqs[i].ifr_name), ifreqs[i].ifr_name);
return 0;
}

19
compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors_ioctl.inc
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@ -66,7 +66,7 @@ static void ioctl_table_fill() {
_(0x00008903, WRITE, sizeof(int)); // FIOGETOWN
_(0x00008904, WRITE, sizeof(int)); // SIOCGPGRP
_(0x00008905, WRITE, sizeof(int)); // SIOCATMAR
_(0x00008912, WRITE, struct_ifconf_sz); // SIOCGIFCONF
_(0x00008912, CUSTOM, 0); // SIOCGIFCONF
_(0x00008913, WRITE, struct_ifreq_sz); // SIOCGIFFLAGS
_(0x00008914, READ, struct_ifreq_sz); // SIOCSIFFLAGS
_(0x00008915, WRITE, struct_ifreq_sz); // SIOCGIFADDR
@ -502,7 +502,13 @@ static void ioctl_common_pre(void *ctx, const ioctl_desc *desc, int d,
COMMON_INTERCEPTOR_READ_RANGE(ctx, arg, desc->size);
if (desc->type != ioctl_desc::CUSTOM)
return;
// FIXME: add some ioctls of "CUSTOM" type and handle them here.
switch (request) {
case 0x00008912: { // SIOCGIFCONF
struct __sanitizer_ifconf *ifc = (__sanitizer_ifconf *)arg;
COMMON_INTERCEPTOR_READ_RANGE(ctx, &ifc->ifc_len, sizeof(ifc->ifc_len));
break;
}
}
return;
}
@ -514,5 +520,12 @@ static void ioctl_common_post(void *ctx, const ioctl_desc *desc, int res, int d,
}
if (desc->type != ioctl_desc::CUSTOM)
return;
return; // FIXME
switch (request) {
case 0x00008912: { // SIOCGIFCONF
struct __sanitizer_ifconf *ifc = (__sanitizer_ifconf *)arg;
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, ifc->ifc_ifcu.ifcu_req, ifc->ifc_len);
break;
}
}
return;
}

6
compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
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@ -150,7 +150,6 @@ namespace __sanitizer {
// ioctl arguments
unsigned struct_arpreq_sz = sizeof(struct arpreq);
unsigned struct_ifconf_sz = sizeof(struct ifconf);
unsigned struct_ifreq_sz = sizeof(struct ifreq);
unsigned struct_termios_sz = sizeof(struct termios);
unsigned struct_winsize_sz = sizeof(struct winsize);
@ -280,4 +279,9 @@ CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_len);
CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_level);
CHECK_SIZE_AND_OFFSET(cmsghdr, cmsg_type);
CHECK_TYPE_SIZE(ifconf);
CHECK_SIZE_AND_OFFSET(ifconf, ifc_len);
CHECK_SIZE_AND_OFFSET(ifconf, ifc_ifcu);
#endif // SANITIZER_LINUX || SANITIZER_MAC

8
compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.h
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@ -149,8 +149,14 @@ namespace __sanitizer {
};
// ioctl arguments
struct __sanitizer_ifconf {
int ifc_len;
union {
void *ifcu_req;
} ifc_ifcu;
};
extern unsigned struct_arpreq_sz;
extern unsigned struct_ifconf_sz;
extern unsigned struct_ifreq_sz;
extern unsigned struct_termios_sz;
extern unsigned struct_winsize_sz;