Bug#923078: hurd: tmpfs not ready for shm support yet
Package: hurd
Version: 1:0.9.git20181030-4
Severity: important
Tags: upstream
tmpfs currently crashes if one does:
- open a file
- mmap it
- close the file
- unlink the file
- dereference the map
because the map doesn't keep a reference, and thus the memory object is
gone.
See in hurd/tmpfs/node.c's diskfs_free_node, DT_REG case:
case DT_REG:
if (np->dn->u.reg.memobj != MACH_PORT_NULL) {
/* XXX GNU Mach will terminate the object, and thus existing mappings
* will get SIGBUS. */
vm_deallocate (mach_task_self (), np->dn->u.reg.memref, 4096);
mach_port_deallocate (mach_task_self (), np->dn->u.reg.memobj);
}
break;
Samuel
-- System Information:
Debian Release: buster/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unreleased'), (500, 'buildd-unstable'), (500, 'unstable'), (500, 'stable'), (1, 'experimental-debug'), (1, 'buildd-experimental'), (1, 'experimental')
Architecture: hurd-i386 (i686-AT386)
Kernel: GNU-Mach 1.8+git20190109-486-dbg/Hurd-0.9
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8), LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages hurd depends on:
ii hurd-libs0.3 1:0.9.git20181030-4
ii libblkid1 2.33.1-0.1
ii libbz2-1.0 1.0.6-9
ii libc0.3 2.28-7
ii libdaemon0 0.14-7
ii libgcrypt20 1.8.4-5
ii liblwip0 2.0.3-3
ii libncursesw6 6.1+20181013-2
ii libtinfo6 6.1+20181013-2
ii libx11-6 2:1.6.7-1
ii lsb-base 10.2018112800
ii netdde 0.0.20150828-5
ii sysv-rc 2.93-8
ii xkb-data 2.26-2
ii zlib1g 1:1.2.11.dfsg-1
Versions of packages hurd recommends:
ii bf-utf-source 0.08
Versions of packages hurd suggests:
ii hurd-doc 1:0.9.git20181030-4
-- Configuration Files:
/etc/hurd/rc changed [not included]
-- no debconf information
--
Samuel Thibault <samuel.thibault@ens-lyon.org>
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