lkml.org 
[lkml]   [2022]   [Apr]   [17]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/2] Two tracing patches for trace_events_hist.c
Date
Hi,

Two patches here.

## Patch 1
If `WARN_ON(!glob)` is ever triggered, we will still continue executing
the next lines. This will trigger the more serious problem, a NULL
pointer dereference bug. Just return -EINVAL if @glob is NULL.

## Patch 2
Change `if (strlen(glob))` to `if (glob[0])`. No need to traverse to
the end of string. If the first byte is not a NUL char, it's
guaranteed `if (strlen(glob))` is true.


Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org>
---

Ammar Faizi (2):
tracing: Return -EINVAL if WARN_ON(!glob) triggered in event_hist_trigger_parse()
tracing: Change `if (strlen(glob))` to `if (glob[0])`

kernel/trace/trace_events_hist.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)


base-commit: a1901b464e7e3e28956ae7423db2847dbbfb5be8
--
Ammar Faizi

\
 
 \ /
  Last update: 2022-04-17 20:55    [W:0.022 / U:1.048 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site