linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-09-18 22:09:30 +02:00

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Shivaprasad G Bhat 0b271f7d7f powerpc/iommu: Fix the overflow validation in iommu_tce_check_ioba

The commit b1af23d836 ("KVM: PPC: iommu: Unify TCE checking") unified
IOBA parameter checking across KVM and VFIO into iommu_tce_check_ioba().
While doing so, the passed in argument npages is ignored and constant
value '1' is used leaving out a possible overflow as the callers can
legitimately be using npages > 1 for H_STUFF_TCE or H_PUT_TCE_INDIRECT
cases.

Fix this by accounting for 'npages', checking for arithmetic overflow,
and verifying that the entire requested range (ioba - offset + npages)
does not exceed the table capacity 'size'.

Fixes: b1af23d836 ("KVM: PPC: iommu: Unify TCE checking")
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Tested-by: R Nageswara Sastry <rnsastry@linux.ibm.com>
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>

2026-09-16 13:43:58 +05:30

boot

Merge tag 'powerpc-7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2026-08-18 12:08:13 -07:00

configs

Merge tag 'tty-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2026-08-25 10:59:12 -07:00

crypto

crypto: powerpc/aes - use bool for encryption/decryption flag

2026-07-17 18:09:22 +10:00

include

powerpc/entry: Fix double accounting of user time on interrupt entry