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| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-10-17 08:49:45 +0900 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-10-17 10:22:42 +0900 |
| commit | 700b2b439766e8aab8a7174991198497345bd411 (patch) | |
| tree | f0fef220a2388ccfad7842063cb34fd50dfdce1d /kernel | |
| parent | 2a86ac30a6687e47436e547deadae3bf0fc28697 (diff) | |
| download | linux-stable-700b2b439766e8aab8a7174991198497345bd411.tar.gz linux-stable-700b2b439766e8aab8a7174991198497345bd411.tar.bz2 linux-stable-700b2b439766e8aab8a7174991198497345bd411.zip | |
fprobe: Fix to ensure the number of active retprobes is not zero
The number of active retprobes can be zero but it is not acceptable,
so return EINVAL error if detected.
Link: https://lore.kernel.org/all/169750018550.186853.11198884812017796410.stgit@devnote2/
Reported-by: wuqiang.matt <wuqiang.matt@bytedance.com>
Closes: https://lore.kernel.org/all/20231016222103.cb9f426edc60220eabd8aa6a@kernel.org/
Fixes: 5b0ab78998e3 ("fprobe: Add exit_handler support")
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/fprobe.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c index 3b21f4063258..881f90f0cbcf 100644 --- a/kernel/trace/fprobe.c +++ b/kernel/trace/fprobe.c @@ -189,7 +189,7 @@ static int fprobe_init_rethook(struct fprobe *fp, int num) { int i, size; - if (num < 0) + if (num <= 0) return -EINVAL; if (!fp->exit_handler) { @@ -202,8 +202,8 @@ static int fprobe_init_rethook(struct fprobe *fp, int num) size = fp->nr_maxactive; else size = num * num_possible_cpus() * 2; - if (size < 0) - return -E2BIG; + if (size <= 0) + return -EINVAL; fp->rethook = rethook_alloc((void *)fp, fprobe_exit_handler); if (!fp->rethook) |