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| author |   Yonghong Song <yhs@fb.com> | 2021-08-09 16:51:51 -0700 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2021-08-10 10:10:49 +0200 |
| commit | 87b7b5335e6995a6d64fca98fc67b92b29caac9c (patch) | |
| tree | 11879d3cfc48083ece2a1f0e9960aed3bcca8792 /net/bpf | |
| parent | bpf: Add lockdown check for probe_write_user helper (diff) | |
| download | linux-dev-87b7b5335e6995a6d64fca98fc67b92b29caac9c.tar.xz linux-dev-87b7b5335e6995a6d64fca98fc67b92b29caac9c.zip | |
bpf: Add missing bpf_read_[un]lock_trace() for syscall program
Commit 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.")
added support for syscall program, which is a sleepable program.
But the program run missed bpf_read_lock_trace()/bpf_read_unlock_trace(),
which is needed to ensure proper rcu callback invocations. This patch adds
bpf_read_[un]lock_trace() properly.
Fixes: 79a7f8bdb159d ("bpf: Introduce bpf_sys_bpf() helper and program type.")
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210809235151.1663680-1-yhs@fb.com
Diffstat (limited to 'net/bpf')
| -rw-r--r-- | net/bpf/test_run.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 1cc75c811e24..caa16bf30fb5 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -7,6 +7,7 @@ #include <linux/vmalloc.h> #include <linux/etherdevice.h> #include <linux/filter.h> +#include <linux/rcupdate_trace.h> #include <linux/sched/signal.h> #include <net/bpf_sk_storage.h> #include <net/sock.h> @@ -951,7 +952,10 @@ int bpf_prog_test_run_syscall(struct bpf_prog *prog, goto out; } } + + rcu_read_lock_trace(); retval = bpf_prog_run_pin_on_cpu(prog, ctx); + rcu_read_unlock_trace(); if (copy_to_user(&uattr->test.retval, &retval, sizeof(u32))) { err = -EFAULT; |