Bug#134802: dboostrap segfault with no CDROM drive
Package: boot-floppies
Severity: serious
Tue, Feb 19, 2002 at 08:33:42PM -0800 wrote:
> There is a note in choose_medium.c that indicates we are assuming this
> file ("/proc/sys/dev/cdrom/info") will not exist if there is no cdrom
> present. It appears as though we are wrong. I'll take a look at how
> to deal with this more gracefully than SIGSEGV.
>
> -David
>
> Tue, Feb 19, 2002 at 07:54:35PM +0100 wrote:
> > Hi,
> >
> > Sorry, I haven't found dbootstrap in the BTS, and it's late.
> > I try to install debian 3.0 on a non standard mipsel target (IDT r4k based).
> > There's net and IDE support, no floppy. My custom kernel is already working
> > fine.
> > Actually, I've downloaded the bf-pre3.0.20cvs20020217 root.bin,
> > dd'ed to a temporary partition, and booted with "root=/dev/hdc2".
> >
> > Well, the problem is with dbootstrap. It segs fault if there's no cdrom
> > drive attached to the IDE chain. Following is a strace of dbootstrap
> > illustrating the problem. The bug seems to lie with the content of
> > /proc/sys/dev/cdrom/info.
> >
> >
> > open("/proc/sys/kernel/osrelease", O_RDONLY) = 3
> > fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> > 0x2aac4000
> > read(3, "2.4.17-mips\n", 1024) = 12
> > close(3) = 0
> > munmap(0x2aac4000, 4096) = 0
> > open("/proc/cpuinfo", O_RDONLY) = 3
> > fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> > 0x2aac4000
> > read(3, "system type\t\t: IDT Homelink\nproc"..., 1024) = 249
> > close(3) = 0
> > munmap(0x2aac4000, 4096) = 0
> > open("/proc/sys/dev/cdrom/info", O_RDONLY) = 3
> > fstat64(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
> > mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
> > 0x2aac4000
> > read(3, "CD-ROM information, Id: cdrom.c "..., 1024) = 343
> > --- SIGSEGV (Segmentation fault) ---
> > +++ killed by SIGSEGV +++
> > # cat /proc/sys/dev/cdrom/info
> > CD-ROM information, Id: cdrom.c 3.12 2000/10/18
> >
> > drive name:
> > drive speed:
> > drive # of slots:
> > Can close tray:
> > Can open tray:
> > Can lock tray:
> > Can change speed:
> > Can select disk:
> > Can read multisession:
> > Can read MCN:
> > Reports media changed:
> > Can play audio:
> > Can write CD-R:
> > Can write CD-RW:
> > Can read DVD:
> > Can write DVD-R:
> > Can write DVD-RAM:
> >
> >
> > #
> >
> > Now, if I plug an old crappy CDROM drive along to my hdc HD,
> > dbootstrap works fine. Here's the content of the troublesome proc file,
> > in the event it helps in fixing dbootstrap source code.
> >
> >
> > # cat /proc/sys/dev/cdrom/info
> > CD-ROM information, Id: cdrom.c 3.12 2000/10/18
> >
> > drive name: hdd
> > drive speed: 9
> > drive # of slots: 1
> > Can close tray: 0
> > Can open tray: 1
> > Can lock tray: 1
> > Can change speed: 1
> > Can select disk: 0
> > Can read multisession: 1
> > Can read MCN: 1
> > Reports media changed: 1
> > Can play audio: 1
> > Can write CD-R: 0
> > Can write CD-RW: 0
> > Can read DVD: 0
> > Can write DVD-R: 0
> > Can write DVD-RAM: 0
> >
> >
> > # uname -a
> > Linux 10.0.0.4 2.4.17-mips #156 mar fiv 19 13:15:35 CET 2002 mips unknown
> >
> >
> >
> >
> > Cheers,
> > Stephane
> >
> > PS: I'm not subscribed to the list.
> >
> >
> > --
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> >
> >
>
>
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