643a16a0eb
In some bad situation, the gts may be freed gru_check_chiplet_assignment.
The call chain can be gru_unload_context->gru_free_gru_context->gts_drop
and kfree finally. However, the caller didn't know if the gts is freed
or not and use it afterwards. This will trigger a Use after Free bug.
Fix it by introducing a return value to see if it's in error path or not.
Free the gts in caller if gru_check_chiplet_assignment check failed.
Fixes: 55484c45dbec ("gru: allow users to specify gru chiplet 2")
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
Acked-by: Dimitri Sivanich <sivanich@hpe.com>
Link: https://lore.kernel.org/r/20221110035033.19498-1-zyytlz.wz@163.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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|---|---|---|
| .. | ||
| gru_instructions.h | ||
| gru.h | ||
| grufault.c | ||
| grufile.c | ||
| gruhandles.c | ||
| gruhandles.h | ||
| grukdump.c | ||
| grukservices.c | ||
| grukservices.h | ||
| grulib.h | ||
| grumain.c | ||
| gruprocfs.c | ||
| grutables.h | ||
| grutlbpurge.c | ||
| Makefile | ||