2008/11/2, Attilio Rao <attilio_at_freebsd.org>: > 2008/11/2, Yuri Pankov <yuri.pankov_at_gmail.com>: > > > Hi, > > > > Trying to mount nonexistent smb share with mount_smbfs leads to > > following panic: > > > > # mount_smbfs //yuri_at_lifebane/blahblah /mnt > > > > Unread portion of the kernel message buffer: > > smb_co_lock: recursive lock for object 1 > > panic: Lock (lockmgr) smb_vc not locked _at_ > > /usr/src/sys/modules/smbfs/../../netsmb/smb_conn.c:329. > > cpuid = 0 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2a > > panic() at panic+0x182 > > witness_assert() at witness_assert+0x21a > > __lockmgr_args() at __lockmgr_args+0x17a > > smb_co_put() at smb_co_put+0x76 > > smb_sm_lookup() at smb_sm_lookup+0xfe > > smb_usr_lookup() at smb_usr_lookup+0xcd > > nsmb_dev_ioctl() at nsmb_dev_ioctl+0x1f6 > > giant_ioctl() at giant_ioctl+0x75 > > devfs_ioctl_f() at devfs_ioctl_f+0x76 > > kern_ioctl() at kern_ioctl+0x92 > > ioctl() at ioctl+0xfd > > syscall() at syscall+0x1bf > > Xfast_syscall() at Xfast_syscall+0xab > > --- syscall (54, FreeBSD ELF64, ioctl), rip = 0x800939aec, rsp = > > 0x7fffffffe038, rbp = 0x7fffffffe450 --- > > Uptime: 6m46s > > Physical memory: 2032 MB > > > So, what is happening here is that smb_co_lock() is AFU. > Infact looking at the code: > int > smb_co_lock(struct smb_connobj *cp, int flags, struct thread *td) > { > ... > if (smb_co_lockstatus(cp, td) == LK_EXCLUSIVE && > (flags & LK_CANRECURSE) == 0) { > SMBERROR("recursive lock for object %d\n", cp->co_level); > return 0; > } > ... Yuri, could you please test this fix: http://www.freebsd.org/~attilio/netsmb.diff and report if it works? You could get a KASSERT running but this is expected as I want to identify on the callers who passes a malformed request and fix it. Thanks, Attilio -- Peace can only be achieved by understanding - A. EinsteinReceived on Sun Nov 02 2008 - 15:17:21 UTC
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