kern/94669: Panic from Failed Removable Media Mount
Jason Harmening
jason.harmening at gmail.com
Sun Mar 19 02:10:11 UTC 2006
>Number: 94669
>Category: kern
>Synopsis: Panic from Failed Removable Media Mount
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Sun Mar 19 02:10:10 GMT 2006
>Closed-Date:
>Last-Modified:
>Originator: Jason Harmening
>Release: 6.1-BETA4
>Organization:
>Environment:
reeBSD CORONA.austin.rr.com 6.1-PRERELEASE FreeBSD 6.1-PRERELEASE #4: Sat Mar 18 18:40:52 CST 2006 root@:/usr/obj/usr/src/sys/CUSTOM_DBG amd64
>Description:
Received the following kernel panic when trying to mount DVD-RAM:
CORONA% mount /dev/acd0 /home/jason/dvdram
g_vfs_done():acd0[READ(offset=114688, length=16384)]error = 5
panic: mount: lost mount
cpuid = 0
KDB: stack backtrace:
kdb_backtrace() at kdb_backtrace+0x37
panic() at panic+0x1d1
vfs_domount() at vfs_domount+0x9ae
vfs_donmount() at vfs_donmount+0x400
kernel_mount() at kernel_mount+0x40
ffs_cmount() at ffs_cmount+0x7c
mount() at mount+0x1e3
syscall() at syscall+0x3a4
Xfast_syscall() at Xfast_syscall+0xa8
--- syscall (21, FreeBSD ELF64, mount), rip = 0x80067e0dc, rsp = 0x7fffffffdc88, rbp = 0x7fffffffe748 ---
Uptime: 1m34s
Dumping 1023 MB (2 chunks)
This may very well be a bad hardware/bad media issue. If so, the OS should at least handle failed removable media mounts in a more elegant way than just panicking. If not, it is a serious bug that should be fixed as soon as possible.
System is 6.1-BETA4/amd64 SMP.
>How-To-Repeat:
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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