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| author | Jason Gunthorpe <jgg@nvidia.com> | 2025-12-17 13:43:04 -0400 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2025-12-18 11:32:10 +0100 |
| commit | 7a089c5d35aa307147e78c5cbeeb1352b92790b1 (patch) | |
| tree | db7ac71c509674064470730064ce140bee4e13b8 /drivers/iommu/amd/init.c | |
| parent | 8f0b4cce4481fb22653697cced8d0d04027cb1e8 (diff) | |
iommupt: Return ERR_PTR from _table_alloc()
syzkaller noticed that with fault injection a failure inside
iommu_alloc_pages_node_sz() oops's in PT_FEAT_DMA_INCOHERENT because it goes
on to make NULL incoherent. Closer inspection shows the return value has
become confused, the alloc routines on the iommupt side expect ERR_PTR while
iommu_alloc_pages_node_sz() returns NULL.
Error out early to fix both issues.
Fixes: aefd967dab64 ("iommupt: Use the incoherent start/stop functions for PT_FEAT_DMA_INCOHERENT")
Fixes: dcd6a011a8d5 ("iommupt: Add map_pages op")
Fixes: cdb39d918579 ("iommupt: Add the basic structure of the iommu implementation")
Reported-by: syzbot+e06bb7478e687f235ad7@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/693a39de.050a0220.4004e.02ce.GAE@google.com/
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'drivers/iommu/amd/init.c')
0 files changed, 0 insertions, 0 deletions