Fix process map parsing when freeing bcc memory (iovisor#2151)

This fixes the format string used to parse the major and minor device fields in /proc/self/maps. These fields have hexadecimal values and hence cannot be parsed as unsigned integers. Fixes: 51480d0 ("implement free_bcc_memory() API (iovisor#2097)") Reported-by: Nageswara R Sastry [email protected] Signed-off-by: Sandipan Das <[email protected]>
yingtaojuzi · Jan 17, 2019 · dd13242 · dd13242
1 parent cda5f98
commit dd13242
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/cc/bcc_elf.c b/src/cc/bcc_elf.c
@@ -863,7 +863,7 @@ int bcc_free_memory() {
  int path_start = 0, path_end = 0;
  unsigned int devmajor, devminor;
  char perms[8];
- if (sscanf(line, "%lx-%lx %7s %lx %u:%u %lu %n%*[^\n]%n",
+ if (sscanf(line, "%lx-%lx %7s %lx %x:%x %lu %n%*[^\n]%n",
  &addr_start, &addr_end, perms, &offset,
  &devmajor, &devminor, &inode,
  &path_start, &path_end) < 7)