Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fix from Ingo Molnar:
"One more fix for a recently discovered bug"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf: Disable monitoring on setuid processes for regular users
+9
-7
+9
-7
fs/exec.c
+9
-7
fs/exec.c
···
1135
1135
set_dumpable(current->mm, suid_dumpable);
1136
1136
}
1137
1137
1138
-
/*
1139
-
* Flush performance counters when crossing a
1140
-
* security domain:
1141
-
*/
1142
-
if (!get_dumpable(current->mm))
1143
-
perf_event_exit_task(current);
1144
-
1145
1138
/* An exec changes our domain. We are no longer part of the thread
1146
1139
group */
1147
1140
···
1198
1205
1199
1206
commit_creds(bprm->cred);
1200
1207
bprm->cred = NULL;
1208
+
1209
+
/*
1210
+
* Disable monitoring for regular users
1211
+
* when executing setuid binaries. Must
1212
+
* wait until new credentials are committed
1213
+
* by commit_creds() above
1214
+
*/
1215
+
if (get_dumpable(current->mm) != SUID_DUMP_USER)
1216
+
perf_event_exit_task(current);
1201
1217
/*
1202
1218
* cred_guard_mutex must be held at least to this point to prevent
1203
1219
* ptrace_attach() from altering our determination of the task's