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| author | Justin Hibbits <jhibbits@FreeBSD.org> | 2023-03-21 13:18:18 +0000 |
|---|---|---|
| committer | Justin Hibbits <jhibbits@FreeBSD.org> | 2023-03-21 13:56:26 +0000 |
| commit | 379e14ba6c61634cc1f50272b6f8f147758ec92f (patch) | |
| tree | f88587141aa1e60c687d2d76e1c6f910ad162d99 | |
| parent | daa0b64a226031d5f753f96cd5a6fb3234cdd8b1 (diff) | |
| download | src-379e14ba6c61634cc1f50272b6f8f147758ec92f.tar.gz src-379e14ba6c61634cc1f50272b6f8f147758ec92f.zip | |
powerpc/pmap: Account for a potential NULL pmap in pmap_sync_icache
It's apparently possible for pcpu->pc_curpmap to be NULL at some point,
leading to a panic. Account for this as is done with the other 64-bit
AIM pmap.
Reported by: pkubaj
Tested by: pkubaj
Fixes: 6f0b2a235a1 ("Add pmap_sync_icache() for radix pmap")
MFC after: 3 days
| -rw-r--r-- | sys/powerpc/aim/mmu_radix.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sys/powerpc/aim/mmu_radix.c b/sys/powerpc/aim/mmu_radix.c index 1e7661ba8068..c95de527f554 100644 --- a/sys/powerpc/aim/mmu_radix.c +++ b/sys/powerpc/aim/mmu_radix.c @@ -5929,6 +5929,9 @@ mmu_radix_sync_icache(pmap_t pm, vm_offset_t va, vm_size_t sz) vm_paddr_t pa = 0; int sync_sz; + if (__predict_false(pm == NULL)) + pm = &curthread->td_proc->p_vmspace->vm_pmap; + while (sz > 0) { pa = pmap_extract(pm, va); sync_sz = PAGE_SIZE - (va & PAGE_MASK); |