46 lines
1.6 KiB
Diff
46 lines
1.6 KiB
Diff
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From: Jean Delvare <jdelvare@suse.de>
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Subject: i2c-tools: i2cbusses: Avoid buffer overflows in sysfs paths
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Patch-mainline: yes
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Git-commit: def2845efacab3a3973fb0218ac5077a162f8f1e
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sprintf isn't safe, use snprintf instead.
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---
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tools/i2cbusses.c | 10 +++++-----
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1 file changed, 5 insertions(+), 5 deletions(-)
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--- a/tools/i2cbusses.c
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+++ b/tools/i2cbusses.c
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@@ -220,18 +220,18 @@ struct i2c_adap *gather_i2c_busses(void)
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/* this should work for kernels 2.6.5 or higher and */
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/* is preferred because is unambiguous */
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- sprintf(n, "%s/%s/name", sysfs, de->d_name);
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+ snprintf(n, NAME_MAX, "%s/%s/name", sysfs, de->d_name);
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f = fopen(n, "r");
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/* this seems to work for ISA */
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if(f == NULL) {
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- sprintf(n, "%s/%s/device/name", sysfs, de->d_name);
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+ snprintf(n, NAME_MAX, "%s/%s/device/name", sysfs, de->d_name);
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f = fopen(n, "r");
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}
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/* non-ISA is much harder */
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/* and this won't find the correct bus name if a driver
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has more than one bus */
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if(f == NULL) {
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- sprintf(n, "%s/%s/device", sysfs, de->d_name);
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+ snprintf(n, NAME_MAX, "%s/%s/device", sysfs, de->d_name);
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if(!(ddir = opendir(n)))
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continue;
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while ((dde = readdir(ddir)) != NULL) {
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@@ -240,8 +240,8 @@ struct i2c_adap *gather_i2c_busses(void)
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if (!strcmp(dde->d_name, ".."))
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continue;
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if ((!strncmp(dde->d_name, "i2c-", 4))) {
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- sprintf(n, "%s/%s/device/%s/name",
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- sysfs, de->d_name, dde->d_name);
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+ snprintf(n, NAME_MAX, "%s/%s/device/%s/name",
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+ sysfs, de->d_name, dde->d_name);
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if((f = fopen(n, "r")))
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goto found;
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}
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