diff options
| author | Pierre Pronchery <pierre@freebsdfoundation.org> | 2024-07-24 19:33:26 +0000 |
|---|---|---|
| committer | Ed Maste <emaste@FreeBSD.org> | 2024-09-30 12:11:15 +0000 |
| commit | a03acfa43410b3a449fa8d5b1dbba20e0bf02d5a (patch) | |
| tree | a3a3129b5a565c09dbe057711aa1db560f2f98f1 | |
| parent | 70280bc71d28935346f7cc7c41ddd99e58b9604a (diff) | |
bhyve: initialize register value
In case of an error in a code pattern like
```
uint64_t val;
error = memread(vcpu, gpa, &val, 1, arg);
error = vie_update_register(vcpu, reg, val, size);
```
uninitialized stack data would be used.
Reported by: Synacktiv
Reviewed by: markj
Security: HYP-21
Sponsored by: The Alpha-Omega Project
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D46107
(cherry picked from commit 94693ec7c85363f9b0098247489cea3efdb183f9)
| -rw-r--r-- | sys/amd64/vmm/vmm_ioport.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/amd64/vmm/vmm_ioport.c b/sys/amd64/vmm/vmm_ioport.c index ec270df80c3e..3caea7deac16 100644 --- a/sys/amd64/vmm/vmm_ioport.c +++ b/sys/amd64/vmm/vmm_ioport.c @@ -101,7 +101,7 @@ static int emulate_inout_port(struct vcpu *vcpu, struct vm_exit *vmexit, bool *retu) { ioport_handler_func_t handler; - uint32_t mask, val; + uint32_t mask, val = 0; int error; /* |