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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 07:27:52 +0000 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 07:27:52 +0000 |
| commit | d0c85e36e4de67af628d54e9ab577cc3fad7796a (patch) | |
| tree | f8f784b0f04343b90516a338d6df81df3a85dfa2 /results/classifier/gemma3:12b/peripherals/1435973 | |
| parent | 7f4364274750eb8cb39a3e7493132fca1c01232e (diff) | |
| download | qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.tar.gz qemu-analysis-d0c85e36e4de67af628d54e9ab577cc3fad7796a.zip | |
add deepseek and gemma results
Diffstat (limited to 'results/classifier/gemma3:12b/peripherals/1435973')
| -rw-r--r-- | results/classifier/gemma3:12b/peripherals/1435973 | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/peripherals/1435973 b/results/classifier/gemma3:12b/peripherals/1435973 new file mode 100644 index 000000000..3e0a8a27c --- /dev/null +++ b/results/classifier/gemma3:12b/peripherals/1435973 @@ -0,0 +1,61 @@ + +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 |