diff options
Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/device/1435973')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/device/1435973 | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/device/1435973 b/results/classifier/deepseek-2-tmp/output/device/1435973 deleted file mode 100644 index 3e0a8a27..00000000 --- a/results/classifier/deepseek-2-tmp/output/device/1435973 +++ /dev/null @@ -1,61 +0,0 @@ - -Qemu crash when a guest linux issues specific scsi command via ioctl(SG_IO) with SCSI disk emulation. - -As of git revision 362ca922eea03240916287a8a6267801ab095d12, when guest linux issues specifit scsi command, qemu crashes. - -To reproduce. - -1. launch qemu with scsi emulatoin -qemu-sysytem-i386.exe -kernel bzImage -drive file=rootfs.ext2,index=0,if=scsi -append root=/dev/sda -drive file=\\.\PhysicalDrive1,index=1,if=scsi -2. issues scsi command via ioctl(SG_IO) on guest linux. like below. - -------------------------- -struct request_sense sens; -struct sg_io_hdr sg; -unsigned char cdb[6]; -unsigned char buf[127]; - -memset( &sens, 0, sizeof(sens) ); -memset(&sg, 0, sizeof(sg)); -memset(cdb, 0, sizeof(cdb)); -memset(buf, 0, sizeof(buf)); - -// qemu crash!!! -cdb[0] = 0xff; - -sg.dxferp = buf; -sg.dxfer_len = sizeof(buf); -sg.dxfer_direction = SG_DXFER_FROM_DEV; -sg.flags = 0; -sg.interface_id = 'S'; -sg.cmdp = cdb; -sg.cmd_len = sizeof( cdb ); -sg.sbp = (unsigned char*)&sens; -sg.mx_sb_len = sizeof( sens ); - -ioctl( fd, SG_IO, &sg ); -------------------------- - -I think cause is below code. - -scsi-bus.c L1239 -int scsi_req_parse_cdb(SCSIDevice *dev, SCSICommand *cmd, uint8_t *buf) -{ - int rc; - - cmd->lba = -1; - cmd->len = scsi_cdb_length(buf); - ... - memcpy(cmd->buf, buf, cmd->len); -} - -scsi_cdb_length(buf) returns -1 when buf[0] is unexpected value. -Then memcpy(cmd->buf, buf, 4294967295); is executed and crash. - -Environment -Qemu: git revision 362ca922eea03240916287a8a6267801ab095d12 -Guest: linux kernel 3.18.4 + buildroot -Host: Windows 7 64bit - -Thanks, -hiroaki \ No newline at end of file |
