linux.git/net/smc, branch v5.11

net/smc: use memcpy instead of snprintf to avoid out of bounds read

2021-01-13T04:22:01+00:00

Using snprintf() to convert not null-terminated strings to null
terminated strings may cause out of bounds read in the source string.
Therefore use memcpy() and terminate the target string with a null
afterwards.

Fixes: a3db10efcc4c ("net/smc: Add support for obtaining SMCR device list")
Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

smc: fix out of bound access in smc_nl_get_sys_info()

2021-01-13T04:22:01+00:00

smc_clc_get_hostname() sets the host pointer to a buffer
which is not NULL-terminated (see smc_clc_init()).

Reported-by: syzbot+f4708c391121cfc58396@syzkaller.appspotmail.com
Fixes: 099b990bd11a ("net/smc: Add support for obtaining system information")
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: fix access to parent of an ib device

2020-12-16T21:33:47+00:00

The parent of an ib device is used to retrieve the PCI device
attributes. It turns out that there are possible cases when an ib device
has no parent set in the device structure, which may lead to page
faults when trying to access this memory.
Fix that by checking the parent pointer and consolidate the pci device
specific processing in a new function.

Fixes: a3db10efcc4c ("net/smc: Add support for obtaining SMCR device list")
Reported-by: syzbot+600fef7c414ee7e2d71b@syzkaller.appspotmail.com
Signed-off-by: Karsten Graul 
Link: https://lore.kernel.org/r/20201215091058.49354-2-kgraul@linux.ibm.com
Signed-off-by: Jakub Kicinski

net/smc: Add support for obtaining SMCR device list

2020-12-02T01:56:13+00:00

Deliver SMCR device information via netlink based
diagnostic interface.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: Add support for obtaining SMCD device list

2020-12-02T01:56:13+00:00

Deliver SMCD device information via netlink based
diagnostic interface.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: Add SMC-D Linkgroup diagnostic support

2020-12-02T01:56:13+00:00

Deliver SMCD Linkgroup information via netlink based
diagnostic interface.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: Introduce SMCR get link command

2020-12-02T01:56:13+00:00

Introduce get link command which loops through
all available links of all available link groups. It
uses the SMC-R linkgroup list as entry point, not
the socket list, which makes linkgroup diagnosis
possible, in case linkgroup does not contain active
connections anymore.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: Introduce SMCR get linkgroup command

2020-12-02T01:56:13+00:00

Introduce get linkgroup command which loops through
all available SMCR linkgroups. It uses the SMC-R linkgroup
list as entry point, not the socket list, which makes
linkgroup diagnosis possible, in case linkgroup does not
contain active connections anymore.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: Add support for obtaining system information

2020-12-02T01:56:13+00:00

Add new netlink command to obtain system information
of the smc module.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski

net/smc: Introduce generic netlink interface for diagnostic purposes

2020-12-02T01:56:12+00:00

Introduce generic netlink interface infrastructure to expose
the diagnostic information regarding smc linkgroups, links and devices.

Signed-off-by: Guvenc Gulce 
Signed-off-by: Karsten Graul 
Signed-off-by: Jakub Kicinski