Michael van Elst wrote: > That would require dg_secsize to be 0 which is difficult to do > because the drivers initialize the value and the common disk_set_info() > function fixes up a zero value.
I can reproduce division by zero but not when rebooting. If I take an unconfigured cgd device, i.e. cgd2 and run mount /dev/cgd2d /tmp the kernel will panic instead of returning ENXIO. > But maybe the dg pointer is bad? Please have a look at the %rdi > register. I don't know what was rdi's value when it crashed during reboot but crashes when mounting /dev/cgd2d all have good kernel-space values. I can examine data at 0x34 offset and it's indeed 0. $ crash -M netbsd.12.core Crash version 7.99.36, image version 7.99.36. System panicked: dump forced via kernel debugger Backtrace from time of crash is available. crash> dmesg|tail iwm0: 11g rates: 1Mbps 2Mbps 5.5Mbps 11Mbps 6Mbps 9Mbps 12Mbps 18Mbps 24Mbps 36M bps 48Mbps 54Mbps acpibat0: normal capacity on 'charge state' fatal integer divide fault in supervisor mode trap type 8 code 0 rip ffffffff808db36f cs 8 rflags 10246 cr2 4d8000 ilevel 0 rs p fffffe8116cfba50 curlwp 0xfffffe836fcbab00 pid 13.1 lowest kstack 0xfffffe8116cf82c0 dumping to dev 20,17 (offset=212951, size=3119109): dump crash> bt _KERNEL_OPT_NARCNET() at 0 _KERNEL_OPT_NARCNET() at 0 db_reboot_cmd() at db_reboot_cmd db_command() at db_command+0xeb db_command_loop() at db_command_loop+0x90 db_trap() at db_trap+0xe3 kdb_trap() at kdb_trap+0xe1 trap() at trap+0x574 --- trap (number 8) --- cgdstrategy() at cgdstrategy+0x26 bdev_strategy() at bdev_strategy+0x68 spec_strategy() at spec_strategy+0x81 VOP_STRATEGY() at VOP_STRATEGY+0x33 bio_doread() at bio_doread+0x98 bread() at bread+0x1a ffs_mountfs() at ffs_mountfs+0x170 ffs_mount() at ffs_mount+0x227 VFS_MOUNT() at VFS_MOUNT+0x34 mount_domount() at mount_domount+0x122 do_sys_mount() at do_sys_mount+0x20f sys___mount50() at sys___mount50+0x33 syscall() at syscall+0x15b --- syscall (number 410) --- 75c7da: crash> ps PID LID S CPU FLAGS STRUCT LWP * NAME WAIT 13 > 1 7 1 0 fffffe836fcbab00 mount_ffs 12 1 2 1 8020000 fffffe811681d2a0 mount 8 1 2 1 8020000 fffffe811681d6c0 ksh 2 1 2 1 8020000 fffffe811681dae0 ksh 1 1 2 1 8020000 fffffe81163f5680 init ... Alex