| commit | 1efb6ee3edea57f57f9fb05dba8dcb3f7333f61f | [log] [tgz] |
|---|---|---|
| author | Martynas Pumputis <m@lambda.lt> | Fri Nov 23 17:43:26 2018 +0100 |
| committer | Daniel Borkmann <daniel@iogearbox.net> | Fri Nov 23 21:54:14 2018 +0100 |
| tree | cf6126f29233e979c5cf92c259ad59c315b6318e | |
| parent | 813961de3ee6474dd5703e883471fd941d6c8f69 [diff] |
bpf: fix check of allowed specifiers in bpf_trace_printk
A format string consisting of "%p" or "%s" followed by an invalid
specifier (e.g. "%p%\n" or "%s%") could pass the check which
would make format_decode (lib/vsprintf.c) to warn.
Fixes: 9c959c863f82 ("tracing: Allow BPF programs to call bpf_trace_printk()")
Reported-by: syzbot+1ec5c5ec949c4adaa0c4@syzkaller.appspotmail.com
Signed-off-by: Martynas Pumputis <m@lambda.lt>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>