6.1-RC panic: mutex Giant not owned at /usr/src/sys/kern/vfs_subr.c:2037

Konstantin Belousov kostikbel at gmail.com
Wed May 3 18:33:50 UTC 2006

On Wed, May 03, 2006 at 06:01:37PM +0100, Gavin Atkinson wrote:
> Just had the following panic on 6.1-RC from source current as of 24
> hours ago:
> db> ex/s *panicstr
> buf.1:  mutex Giant not owned at /usr/src/sys/kern/vfs_subr.c:2037
> db> tr
> Tracing pid 6158 tid 100120 td 0xc64e4180
> kdb_enter(c089df29) at kdb_enter+0x2b
> panic(c089d3c0,c08b1ac6,c08a7350,7f5,c6f8a550) at panic+0x127
> _mtx_assert(c0981140,1,c08a7350,7f5) at _mtx_assert+0x67
> vrele(c6f8a550,c6f8a550,c64e4180,eb8bc884,c64e4180) at vrele+0x4e
> smbfs_reclaim(eb8bc884) at smbfs_reclaim+0xe0
> VOP_RECLAIM_APV(c922cae0,eb8bc884) at VOP_RECLAIM_APV+0x7e
> vgonel(c783ecc0) at vgonel+0x12d
> vtryrecycle(c783ecc0,0,2,eb8bc904,c069e9d3) at vtryrecycle+0x107
> vnlru_free(1) at vnlru_free+0x14e
> getnewvnode(c08a5197,c4cf9800,c09555a0,eb8bc970,eb8bc948) at getnewvnode+0x33
> ffs_vget(c4cf9800,305a7,2,eb8bc9d4) at ffs_vget+0xc2
> ufs_lookup(eb8bca78) at ufs_lookup+0xaa2
> vfs_cache_lookup(eb8bcb14,c5820880,0,eb8bcb30,c0699cca) at vfs_cache_lookup+0xb2
> VOP_LOOKUP_APV(c09555a0,eb8bcb14) at VOP_LOOKUP_APV+0x87
> lookup(eb8bcba0,0,0,c64e4180,c643a400) at lookup+0x456
> namei(eb8bcba0,86e84bc,0,0,c4e76bb0) at namei+0x37e
> kern_lstat(c64e4180,86e84bc,0,eb8bcc74) at kern_lstat+0x47
> lstat(c64e4180,eb8bcd04,2,221,216) at lstat+0x1b
> syscall(bfbf003b,bfbf003b,820003b,bfbfed7c,bfbfed50) at syscall+0x22f
> Xint0x80_syscall() at Xint0x80_syscall+0x1f
> --- syscall (190, FreeBSD ELF32, lstat), eip = 0x281f6f6b, esp = 0x81da9c0, ebp-
> I have a single filesystem mounted over smb, at the time of the panic, I
> may have had a file or two open, but won't have been pulling data off it
> (the SMB mount is my mp3 collection, but xmms was paused at the time)
> I didn't have a serial console attached at the time (hence the need to
> print the panicstr separately) and couldn't get a dump, so I hope the
> above is enough to go on.

This is already fixed in rev. 1.669 of sys/kern/vfs_subr.c.
Please, ask re@ for MFC.
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