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Groups > linux.debian.bugs.dist > #991495

Bug#949003: Doesn't work on 64 bit architectures

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Package: slirp
Version: 1:1.0.17-9
Severity: important

The last upload fixes slirp crashes directly on startup on amd64; It now just crashes
when starting to use it....

backtrace:
Program terminated with signal SIGSEGV, Segmentation fault.
#0  0x00005567818fa30b in tcp_reass (tp=tp@entry=0x556782590610, ti=0x82590610, ti@entry=0x0, m=<optimized out>, m@entry=0x0)
    at ./tcp_input.c:210
210	./tcp_input.c: No such file or directory.
(gdb) bt
#0  0x00005567818fa30b in tcp_reass (tp=tp@entry=0x556782590610, ti=0x82590610, ti@entry=0x0, m=<optimized out>, m@entry=0x0)
    at ./tcp_input.c:210
#1  0x00005567818fb8c1 in tcp_input (m=0x55678258ed00, iphlen=<optimized out>, inso=inso@entry=0x0) at ./tcp_input.c:1074
#2  0x00005567818f073c in ip_input (m=<optimized out>) at ip_input.c:214
#3  0x00005567818f86ef in sl_dispatch (ttyp=ttyp@entry=0x55678258b2d0) at ./sl.c:127
#4  0x00005567818f889e in sl_input (ttyp=0x55678258b2d0, if_bptr=0x7ffdd869e9e9 "\300\004\005\264\004\002\b\n\366KBX",
    if_n=<optimized out>) at ./sl.c:35
#5  0x00005567818ef6b2 in if_input (ttyp=0x55678258b2d0) at ./if.c:191
#6  0x00005567818f24a4 in main_loop () at ./main.c:1158
#7  0x00005567818e37d7 in main (argc=1, argv=0x7ffdd869f848) at ./main.c:95


Problem now is usage of dereferences of seg_next which again is a pointer
cast to a 32 bit value to cause disaster.

Most likely all the usages of `#if SIZEOF_CHAR_P == 4` should be reviewed and
fixed up to properly make slirp work on 64 bit systrms...

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 5.4.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE=en_GB.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages slirp depends on:
ii  libc6      2.29-9
ii  libcrypt1  1:4.4.10-10

slirp recommends no packages.

slirp suggests no packages.

-- no debconf information

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Thread

Bug#949003: Doesn't work on 64 bit architectures Sjoerd Simons <sjoerd@debian.org> - 2020-01-15 22:10 +0100
  Bug#949003: Doesn't work on 64 bit architectures Roberto Lumbreras <rover@debian.org> - 2020-01-15 23:00 +0100
    Bug#949003: Doesn't work on 64 bit architectures Sjoerd Simons <sjoerd@debian.org> - 2020-01-15 23:10 +0100

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