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| author | Vasily Gorbik <gor@linux.ibm.com> | 2019-07-08 15:24:38 +0300 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2019-07-11 21:40:02 +0300 |
| commit | 9a159190414d461fdac7ae5bb749c2d532b35419 (patch) | |
| tree | 5a56c4dde47542d0b300506c1a7bb34df0242173 /drivers/s390/crypto | |
| parent | 73df167c819e49d65576e3015f2b1385034baafb (diff) | |
| download | linux-9a159190414d461fdac7ae5bb749c2d532b35419.tar.xz | |
s390/unwind: avoid int overflow in outside_of_stack
When current task is interrupted in-between stack frame allocation
and backchain write instructions new stack frame backchain pointer
is left uninitialized. That invalid backchain value is passed into
outside_of_stack for sanity check. Make sure int overflow does not happen
by subtracting stack_frame size from the stack "end" rather than adding
it to "random" backchain value.
Fixes: 41b0474c1b1c ("s390/unwind: introduce stack unwind API")
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'drivers/s390/crypto')
0 files changed, 0 insertions, 0 deletions