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authorAl Viro <viro@zeniv.linux.org.uk>2014-12-17 05:29:16 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2014-12-17 08:27:14 -0500
commit7d65cf10e3d7747033b83fa18c5f3d2a498f66bc (patch)
treee10e627d7292ff6b802cb0cee6abacaedb70b103 /fs
parent50062175ffc844b8ff9664024c6416a37ad63c77 (diff)
unfuck binfmt_misc.c (broken by commit e6084d4)
scanarg(s, del) never returns s; the empty field results in s + 1. Restore the correct checks, and move NUL-termination into scanarg(), while we are at it. Incidentally, mixing "coding style cleanups" (for small values of cleanup) with functional changes is a Bad Idea(tm)... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/binfmt_misc.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c04ef1d4f18a..97aff2879cda 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -254,6 +254,7 @@ static char *scanarg(char *s, char del)
return NULL;
}
}
+ s[-1] ='\0';
return s;
}
@@ -378,8 +379,7 @@ static Node *create_entry(const char __user *buffer, size_t count)
p = scanarg(p, del);
if (!p)
goto einval;
- p[-1] = '\0';
- if (p == e->magic)
+ if (!e->magic[0])
goto einval;
if (USE_DEBUG)
print_hex_dump_bytes(
@@ -391,8 +391,7 @@ static Node *create_entry(const char __user *buffer, size_t count)
p = scanarg(p, del);
if (!p)
goto einval;
- p[-1] = '\0';
- if (p == e->mask) {
+ if (!e->mask[0]) {
e->mask = NULL;
pr_debug("register: mask[raw]: none\n");
} else if (USE_DEBUG)

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