KVM: s390: Fix a deadlock

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In some scenarios, a deadlock can happen, involving _do_shadow_pte().

Convert all usages of pgste_get_lock() to pgste_get_trylock() in
_do_shadow_pte() and return -EAGAIN. All callers can already deal with
-EAGAIN being returned.

Fixes: e38c884df9 ("KVM: s390: Switch to new gmap")
Tested-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

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Claudio Imbrenda 2026-03-03 18:52:06 +01:00

parent 5ee8dbf546

commit f303406efd

1 changed files with 4 additions and 2 deletions

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arch/s390/kvm/gaccess.c

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