From: Eric Biggers <[email protected]> Date: Sun, 13 May 2018 17:01:30 -0700
> From: Eric Biggers <[email protected]> > > It's possible to crash the kernel in several different ways by sending > messages to the SMC_PNETID generic netlink family that are missing the > expected attributes: > > - Missing SMC_PNETID_NAME => null pointer dereference when comparing > names. > - Missing SMC_PNETID_ETHNAME => null pointer dereference accessing > smc_pnetentry::ndev. > - Missing SMC_PNETID_IBNAME => null pointer dereference accessing > smc_pnetentry::smcibdev. > - Missing SMC_PNETID_IBPORT => out of bounds array access to > smc_ib_device::pattr[-1]. > > Fix it by validating that all expected attributes are present and that > SMC_PNETID_IBPORT is nonzero. > > Reported-by: [email protected] > Fixes: 6812baabf24d ("smc: establish pnet table management") > Cc: <[email protected]> # v4.11+ > Signed-off-by: Eric Biggers <[email protected]> Applied and queued up for -stable, thanks.
