Date: Wed, 18 Jan 2006 02:05:49 -0500 From: Kris Kennaway <kris@obsecurity.org> To: current@FreeBSD.org Subject: System call munmap returning with the following locks held: Giant Message-ID: <20060118070549.GA617@xor.obsecurity.org>
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--tKW2IUtsqtDRztdT Content-Type: text/plain; charset=us-ascii Content-Disposition: inline I ran some code of ups@ that essentially does mmap/munmap of created files, which I ran on a nfs-mounted filesystem. At the same time I was running umount -f on that filesystem in a loop (this was all to try and provoke another umount -f panic I'm seeing). It quickly panicked with this: System call munmap returning with the following locks held: exclusive sleep mutex Giant r = 0 (0xc07ea408) locked @ vm/vm_object.c:449 panic: witness_warn cpuid = 1 KDB: enter: panic [thread pid 3045 tid 100101 ] Stopped at kdb_enter+0x30: leave db> wh Tracing pid 3045 tid 100101 td 0xc9627000 kdb_enter(c071c7f5,1,c0720ca2,f7a46c64,c9627000) at kdb_enter+0x30 panic(c0720ca2,f7a46c8c,1,2,c9627000) at panic+0x13f witness_warn(2,0,c073c410,c07214aa,c9922318) at witness_warn+0x16a syscall(3b,3b,3b,2804ebb6,bfbfe8a8) at syscall+0x56d Xint0x80_syscall() at Xint0x80_syscall+0x1f --- syscall (0, FreeBSD ELF32, nosys), eip = 0x28127e7f, esp = 0xbfbfe7fc, ebp = 0xbfbfe828 --- db> --tKW2IUtsqtDRztdT Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDzejMWry0BWjoQKURAhCyAKCg4NyRm25II5cHwmuRp98dLwcm8ACg5dbv 8NC/je+JilMpcsJ/Oocxm8Q= =gNgv -----END PGP SIGNATURE----- --tKW2IUtsqtDRztdT--
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