On Sat, 2013-09-07 at 17:05 +0200, Davide Italiano wrote: > On Fri, Sep 6, 2013 at 6:00 PM, Sean Bruno <sean_br...@yahoo.com> wrote: > > Our "yBSD" builder needs to mount a disk image temporarily that has a > > dos partition (for openstack-ish things) to put configs into it. It > > seems that under high stress, we can squeeze a panic out of it in > > namei(). > > > > Sean > > > > > > Unread portion of the kernel message buffer: > > panic: namei: nameiop contaminated with flags > > cpuid = 8 > > KDB: stack backtrace: > > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame > > 0xfffffe048d8e53b0 > > kdb_backtrace() at kdb_backtrace+0x39/frame 0xfffffe048d8e5460 > > vpanic() at vpanic+0x126/frame 0xfffffe048d8e54a0 > > kassert_panic() at kassert_panic+0x136/frame 0xfffffe048d8e5510 > > namei() at namei+0x2c8/frame 0xfffffe048d8e5600 > > msdosfs_mount() at msdosfs_mount+0x556/frame 0xfffffe048d8e57c0 > > vfs_donmount() at vfs_donmount+0xc35/frame 0xfffffe048d8e5aa0 > > sys_nmount() at sys_nmount+0x72/frame 0xfffffe048d8e5ae0 > > amd64_syscall() at amd64_syscall+0x223/frame 0xfffffe048d8e5bf0 > > Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe048d8e5bf0 > > --- syscall (378, FreeBSD ELF64, sys_nmount), rip = 0x8000a8b68a, rsp = > > 0x7fffffffd508, rbp = 0x7fffffffdb30 --- > > Uptime: 34m55s > > Dumping 1140 out of 16350 > > MB:..2%..12%..22%..31%..41%..51%..61%..71%..82%..92% > > > > Reading symbols from /boot/modules/msdosfs.ko...done. > > Loaded symbols for /boot/modules/msdosfs.ko > > #0 doadump (textdump=1) at pcpu.h:227 > > 227 pcpu.h: No such file or directory. > > in pcpu.h > > (kgdb) Hangup detected on fd 0 > > error detected on stdin > > Can you please print the value of cnp->cn_nameiop (or, even better, > the whole struct) before the panic? > > Thanks, >
Hrm ... tried to reproduce after recompiling the kernel (turning off KDB_UNATTENDED) and its not happening now. I'll keep an eye out for it. Sean
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