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| author | Russell Currey <ruscur@russell.cc> | 2016-09-12 14:17:22 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-09-23 07:54:20 +1000 |
| commit | 04fec21c06e35b169a83e75a84a015ab4606bf5e (patch) | |
| tree | 88e4eea89c5f8496006d5c25ebc277f57e51c8b3 /arch/powerpc/platforms/powernv/eeh-powernv.c | |
| parent | a24553dd02dc6c7d2912af0b4b9c7f833c90e561 (diff) | |
| download | linux-04fec21c06e35b169a83e75a84a015ab4606bf5e.tar.gz linux-04fec21c06e35b169a83e75a84a015ab4606bf5e.tar.bz2 linux-04fec21c06e35b169a83e75a84a015ab4606bf5e.zip | |
powerpc/eeh: Null check uses of eeh_pe_bus_get
eeh_pe_bus_get() can return NULL if a PCI bus isn't found for a given PE.
Some callers don't check this, and can cause a null pointer dereference
under certain circumstances.
Fix this by checking NULL everywhere eeh_pe_bus_get() is called.
Fixes: 8a6b1bc70dbb ("powerpc/eeh: EEH core to handle special event")
Cc: stable@vger.kernel.org # v3.11+
Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/powernv/eeh-powernv.c')
| -rw-r--r-- | arch/powerpc/platforms/powernv/eeh-powernv.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/powernv/eeh-powernv.c b/arch/powerpc/platforms/powernv/eeh-powernv.c index 86544ea85dc3..cb08e6aaf9bd 100644 --- a/arch/powerpc/platforms/powernv/eeh-powernv.c +++ b/arch/powerpc/platforms/powernv/eeh-powernv.c @@ -1091,6 +1091,11 @@ static int pnv_eeh_reset(struct eeh_pe *pe, int option) } bus = eeh_pe_bus_get(pe); + if (!bus) { + pr_err("%s: Cannot find PCI bus for PHB#%d-PE#%x\n", + __func__, pe->phb->global_number, pe->addr); + return -EIO; + } if (pe->type & EEH_PE_VF) return pnv_eeh_reset_vf_pe(pe, option); |