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author | Damien Le Moal <damien.lemoal@opensource.wdc.com> | 2022-06-09 05:24:55 +0300 |
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committer | Martin K. Petersen <martin.petersen@oracle.com> | 2022-06-10 20:08:06 +0300 |
commit | 44f2bfe9ef082f76184d4a048c995729d14ec45d (patch) | |
tree | b264450c2813278fddde3d086f0a689d865001df /include | |
parent | c3752f44604f3bc4f3ce6e169fa32d16943ff70b (diff) | |
download | linux-44f2bfe9ef082f76184d4a048c995729d14ec45d.tar.xz |
scsi: libsas: Introduce struct smp_rg_resp
When compiling with gcc 12, several warnings are thrown by gcc when
compiling drivers/scsi/libsas/sas_expander.c, e.g.:
In function ‘sas_get_ex_change_count’,
inlined from ‘sas_find_bcast_dev’ at
drivers/scsi/libsas/sas_expander.c:1816:8:
drivers/scsi/libsas/sas_expander.c:1781:20: warning: array subscript
‘struct smp_resp[0]’ is partly outside array bounds of ‘unsigned
char[32]’ [-Warray-bounds]
1781 | if (rg_resp->result != SMP_RESP_FUNC_ACC) {
| ~~~~~~~^~~~~~~~
This is due to the use of the struct smp_resp to aggregate all possible
response types using a union but allocating a response buffer with a size
exactly equal to the size of the response type needed. This leads to access
to fields of struct smp_resp from an allocated memory area that is smaller
than the size of struct smp_resp.
Fix this by defining struct smp_rg_resp for sas report general responses.
Link: https://lore.kernel.org/r/20220609022456.409087-3-damien.lemoal@opensource.wdc.com
Reviewed-by: John Garry <john.garry@huawei.com>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/scsi/sas.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/scsi/sas.h b/include/scsi/sas.h index b3ee9bd63277..a8f9743ed6fc 100644 --- a/include/scsi/sas.h +++ b/include/scsi/sas.h @@ -696,6 +696,14 @@ struct report_phy_sata_resp { #error "Bitfield order not defined!" #endif +struct smp_rg_resp { + u8 frame_type; + u8 function; + u8 result; + u8 reserved; + struct report_general_resp rg; +} __attribute__ ((packed)); + struct smp_disc_resp { u8 frame_type; u8 function; |