Messages in this thread Patch in this message | | | Date | Tue, 09 Apr 2013 14:00:58 +0800 | From | Chen Gang <> | Subject | [PATCH] kernel: kallsyms: parameters checking, for EXPORT_SYMBOL_GPL functions |
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for EXPORT_SYMBOL_GPL functions, necessary to check their parameters.
Signed-off-by: Chen Gang <gang.chen@asianux.com> --- kernel/kallsyms.c | 12 ++++++++++++ 1 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index 2169fee..4ba57a9 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -175,6 +175,9 @@ unsigned long kallsyms_lookup_name(const char *name) unsigned long i; unsigned int off; + if (!name || !name[0]) + return 0; + for (i = 0, off = 0; i < kallsyms_num_syms; i++) { off = kallsyms_expand_symbol(off, namebuf); @@ -194,6 +197,9 @@ int kallsyms_on_each_symbol(int (*fn)(void *, const char *, struct module *, unsigned int off; int ret; + if (!fn) + return -EINVAL; + for (i = 0, off = 0; i < kallsyms_num_syms; i++) { off = kallsyms_expand_symbol(off, namebuf); ret = fn(data, namebuf, NULL, kallsyms_addresses[i]); @@ -382,6 +388,9 @@ static int __sprint_symbol(char *buffer, unsigned long address, */ int sprint_symbol(char *buffer, unsigned long address) { + if (!buffer) + return 0; + return __sprint_symbol(buffer, address, 0, 1); } EXPORT_SYMBOL_GPL(sprint_symbol); @@ -399,6 +408,9 @@ EXPORT_SYMBOL_GPL(sprint_symbol); */ int sprint_symbol_no_offset(char *buffer, unsigned long address) { + if (!buffer) + return 0; + return __sprint_symbol(buffer, address, 0, 0); } EXPORT_SYMBOL_GPL(sprint_symbol_no_offset); -- 1.7.7.6
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