Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
Merge branch 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull SMP fixes from Thomas Gleixner:
"Two small changes for the cpu hotplug code:
- Prevent out of bounds access which actually might crash the machine
caused by a missing bounds check in the fail injection code
- Warn about unsupported migitation mode command line arguments to
make people aware that they typoed the paramater. Not necessarily a
fix but quite some people tripped over that"
* 'smp-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
cpu/hotplug: Fix out-of-bounds read when setting fail state
cpu/speculation: Warn on unsupported mitigations= parameter
+6
+6
kernel/cpu.c
+6
kernel/cpu.c
···
1964
1964
if (ret)
1965
1965
return ret;
1966
1966
1967
+
if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE)
1968
+
return -EINVAL;
1969
+
1967
1970
/*
1968
1971
* Cannot fail STARTING/DYING callbacks.
1969
1972
*/
···
2342
2339
cpu_mitigations = CPU_MITIGATIONS_AUTO;
2343
2340
else if (!strcmp(arg, "auto,nosmt"))
2344
2341
cpu_mitigations = CPU_MITIGATIONS_AUTO_NOSMT;
2342
+
else
2343
+
pr_crit("Unsupported mitigations=%s, system may still be vulnerable\n",
2344
+
arg);
2345
2345
2346
2346
return 0;
2347
2347
}