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| author | Zheng Wang <zyytlz.wz@163.com> | 2022-11-10 11:50:33 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-11-23 19:55:48 +0100 |
| commit | 643a16a0eb1d6ac23744bb6e90a00fc21148a9dc (patch) | |
| tree | 7468067fe18759860b8d90c20707458c60e1199a /drivers/misc/cxl/trace.h | |
| parent | fd2c930cf6a5b9176382c15f9acb1996e76e25ad (diff) | |
| download | linux-643a16a0eb1d6ac23744bb6e90a00fc21148a9dc.tar.gz linux-643a16a0eb1d6ac23744bb6e90a00fc21148a9dc.tar.bz2 linux-643a16a0eb1d6ac23744bb6e90a00fc21148a9dc.zip | |
misc: sgi-gru: fix use-after-free error in gru_set_context_option, gru_fault and gru_handle_user_call_os
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>
Diffstat (limited to 'drivers/misc/cxl/trace.h')
0 files changed, 0 insertions, 0 deletions