Date: Thu, 16 Jan 2003 16:14:41 -0400 (AST) From: "Marc G. Fournier" <scrappy@hub.org> To: freebsd-stable@freebsd.org Subject: double mounted file system causes panic ... Message-ID: <20030116160539.B15704@hub.org>
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one of my guys accidentally mounted a unionfs a second time, causing the
following panic ... not sure if the following helps any?
(kgdb) wher
#0 0xc959d256 in ?? ()
#1 0xc013ec50 in boot (howto=256) at /usr/src/sys/kern/kern_shutdown.c:223
#2 0xc013f375 in panic (fmt=0xc02111f9 "%s")
at /usr/src/sys/kern/kern_shutdown.c:595
#3 0xc01e4f15 in trap_fatal (frame=0xf7733d60, eva=8)
at /usr/src/sys/i386/i386/trap.c:974
#4 0xc01e4b81 in trap_pfault (frame=0xf7733d60, usermode=0, eva=8)
at /usr/src/sys/i386/i386/trap.c:867
#5 0xc01e46db in trap (frame={tf_fs = -143458280, tf_es = -1071972336,
tf_ds = -922550256, tf_edi = -143442440, tf_esi = 0,
tf_ebp = -143442488, tf_isp = -143442548, tf_ebx = -143442308,
tf_edx = -905770752, tf_ecx = 52, tf_eax = 0, tf_trapno = 12,
tf_err = 0, tf_eip = -905788034, tf_cs = 8, tf_eflags = 66198,
tf_esp = -143442308, tf_ss = 0}) at /usr/src/sys/i386/i386/trap.c:466
#6 0xca02c57e in ?? ()
#7 0xca02b5b3 in ?? ()
#8 0xc016f36b in mount (p=0xf75896c0, uap=0xf7733f80)
at /usr/src/sys/kern/vfs_syscalls.c:314
#9 0xc01e5251 in syscall2 (frame={tf_fs = 47, tf_es = 47, tf_ds = 47,
tf_edi = -1077937168, tf_esi = -1077939308, tf_ebp = -1077937260,
tf_isp = -143441964, tf_ebx = 0, tf_edx = 0, tf_ecx = 0, tf_eax = 21,
tf_trapno = 12, tf_err = 2, tf_eip = 134516864, tf_cs = 31,
tf_eflags = 582, tf_esp = -1077939400, tf_ss = 47})
at /usr/src/sys/i386/i386/trap.c:1175
#10 0xc01d297b in Xint0x80_syscall ()
#11 0x8048135 in ?? ()
(kgdb) up 5
#5 0xc01e46db in trap (frame={tf_fs = -143458280, tf_es = -1071972336,
tf_ds = -922550256, tf_edi = -143442440, tf_esi = 0,
tf_ebp = -143442488, tf_isp = -143442548, tf_ebx = -143442308,
tf_edx = -905770752, tf_ecx = 52, tf_eax = 0, tf_trapno = 12,
tf_err = 0, tf_eip = -905788034, tf_cs = 8, tf_eflags = 66198,
tf_esp = -143442308, tf_ss = 0}) at /usr/src/sys/i386/i386/trap.c:466
466 (void) trap_pfault(&frame, FALSE, eva);
(kgdb)
(kgdb) up
#2 0xc016f36b in mount (p=0xf75896c0, uap=0xf7733f80)
at /usr/src/sys/kern/vfs_syscalls.c:314
314 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
(kgdb) list
309 /*
310 * Mount the filesystem.
311 * XXX The final recipients of VFS_MOUNT just overwrite the ndp they
312 * get. No freeing of cn_pnbuf.
313 */
314 error = VFS_MOUNT(mp, SCARG(uap, path), SCARG(uap, data), &nd, p);
315 if (mp->mnt_flag & MNT_UPDATE) {
316 if (mp->mnt_kern_flag & MNTK_WANTRDWR)
317 mp->mnt_flag &= ~MNT_RDONLY;
318 mp->mnt_flag &=~ (MNT_UPDATE | MNT_RELOAD | MNT_FORCE);
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