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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-12-22 16:30:34 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2018-01-12 09:54:13 +0100 |
| commit | 2770c90d432b571cab718e28f838097f0b2201ec (patch) | |
| tree | ebf68e86e1b04e5ab79d4e0dfa0b2b5f40933d21 /scsi/utils.c | |
| parent | d9bcd6f7f23a13ea627d8edb85c0706525da0b75 (diff) | |
| download | qemu-2770c90d432b571cab718e28f838097f0b2201ec.zip qemu-2770c90d432b571cab718e28f838097f0b2201ec.tar.gz qemu-2770c90d432b571cab718e28f838097f0b2201ec.tar.bz2 | |
scsi: fix scsi_convert_sense crash when in_buf == NULL && in_len == 0
scsi_disk_emulate_command passes in_buf == NULL when sent a REQUEST
SENSE command. Check for in_len == 0 before dereferencing in_buf.
Fixes: f68d98b21fa74155dc7c1fd212474379ac3c7531
Reported-by: Roman Kagan <rkagan@virtuozzo.com>
Tested-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'scsi/utils.c')
| -rw-r--r-- | scsi/utils.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/scsi/utils.c b/scsi/utils.c index ddae650..8738522 100644 --- a/scsi/utils.c +++ b/scsi/utils.c @@ -322,18 +322,18 @@ int scsi_convert_sense(uint8_t *in_buf, int in_len, SCSISense sense; bool fixed_in; + if (in_len == 0) { + return scsi_build_sense_buf(buf, len, SENSE_CODE(NO_SENSE), fixed); + } + fixed_in = (in_buf[0] & 2) == 0; - if (in_len && fixed == fixed_in) { + if (fixed == fixed_in) { memcpy(buf, in_buf, MIN(len, in_len)); return MIN(len, in_len); - } - - if (in_len == 0) { - sense = SENSE_CODE(NO_SENSE); } else { sense = scsi_parse_sense_buf(in_buf, in_len); + return scsi_build_sense_buf(buf, len, sense, fixed); } - return scsi_build_sense_buf(buf, len, sense, fixed); } int scsi_sense_to_errno(int key, int asc, int ascq) |