Messages in this thread | | | From | Alexei Starovoitov <> | Date | Tue, 17 Nov 2020 20:08:08 -0800 | Subject | Re: [PATCH] fail_function: remove a redundant mutex unlock |
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On Wed, Nov 11, 2020 at 1:31 AM Masami Hiramatsu <mhiramat@kernel.org> wrote: > > Hi Luo, > > On Tue, 10 Nov 2020 16:42:45 +0800 > Luo Meng <luomeng12@huawei.com> wrote: > > > Fix a mutex_unlock() issue where before copy_from_user() is > > not called mutex_locked. > > Oops, thank you for the fix. > > Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Did anyone pick this up? If not, please resend cc-ing bpf@vger so it can get into patchwork and be processed by bpf maintainers.
Thanks!
> > > > Fixes: 4b1a29a7f542 ("error-injection: Support fault injection framework") > > Reported-by: Hulk Robot <hulkci@huawei.com> > > Signed-off-by: Luo Meng <luomeng12@huawei.com> > > --- > > kernel/fail_function.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > diff --git a/kernel/fail_function.c b/kernel/fail_function.c > > index 63b349168da7..b0b1ad93fa95 100644 > > --- a/kernel/fail_function.c > > +++ b/kernel/fail_function.c > > @@ -253,7 +253,7 @@ static ssize_t fei_write(struct file *file, const char __user *buffer, > > > > if (copy_from_user(buf, buffer, count)) { > > ret = -EFAULT; > > - goto out; > > + goto out_free; > > } > > buf[count] = '\0'; > > sym = strstrip(buf); > > @@ -307,8 +307,9 @@ static ssize_t fei_write(struct file *file, const char __user *buffer, > > ret = count; > > } > > out: > > - kfree(buf); > > mutex_unlock(&fei_lock); > > +out_free: > > + kfree(buf); > > return ret; > > } > > > > -- > > 2.25.4 > > > > > -- > Masami Hiramatsu <mhiramat@kernel.org>
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