Bug#989078: several SIGABRT in containers

[Michael Biebl]

control: severity -1 normal
control: tags -1 + moreinfo upstream

Am 25.05.21 um 15:29 schrieb Simon Richter:

Package: systemd
Version: 241-7~deb10u7
Severity: important
Tags: upstream

Hi,

I have a Docker container where I compile FPGA images using the QuartusII
toolchain, but this fails with

     realloc(): invalid pointer
     Aborted

Investigating this, I got a backtrace from gdb:

     #0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
     #1  0x00007f242ac38535 in __GI_abort () at abort.c:79
     #2  0x00007f242ac8f508 in __libc_message (action=action@entry=do_abort, 
fmt=fmt@entry=0x7f242ad9a28d "%s\n") at ../sysdeps/posix/libc_fatal.c:181
     #3  0x00007f242ac95c1a in malloc_printerr (str=str@entry=0x7f242ad98587 
"realloc(): invalid pointer") at malloc.c:5341
     #4  0x00007f242ac9ae4a in __GI___libc_realloc (oldmem=0x7f242583b378, 
bytes=9) at malloc.c:3166
     #5  0x00007f24256afaf5 in strextend_with_separator 
(x=x@entry=0x7ffe16aeaba0, separator=0x0, separator=0x0) at 
../src/basic/string-util.c:920
     #6  0x00007f24256b3081 in chase_symlinks.constprop.36 (path=<optimized 
out>, ret=0x7ffe16aeac98, flags=0, original_root=0x0) at 
../src/basic/fs-util.c:1009
     #7  0x00007f24256b8c0c in device_set_syspath (device=0x19e5760, 
_syspath=_syspath@entry=0x7ffe16aead10 "/sys/bus/serio/devices/serio0", 
verify=verify@entry=true)
         at ../src/libsystemd/sd-device/sd-device.c:148
     #8  0x00007f24256b930a in sd_device_new_from_syspath (ret=ret@entry=0x7ffe16aeadd0, 
syspath=syspath@entry=0x7ffe16aead10 "/sys/bus/serio/devices/serio0")
         at ../src/libsystemd/sd-device/sd-device.c:223
     #9  0x00007f24256bf572 in enumerator_scan_dir_and_add_devices 
(enumerator=enumerator@entry=0x19e5690, basedir=basedir@entry=0x7f24256c77c8 
"bus",
         subdir1=subdir1@entry=0x7f24257d014b "serio", 
subdir2=subdir2@entry=0x7f24256c77ef "devices") at 
../src/libsystemd/sd-device/device-enumerator.c:471
     #10 0x00007f24256bf945 in enumerator_scan_dir (enumerator=enumerator@entry=0x19e5690, 
basedir=basedir@entry=0x7f24256c77c8 "bus", subdir=<optimized out>, 
subsystem=0x0)
         at ../src/libsystemd/sd-device/device-enumerator.c:568
     #11 0x00007f24256c221f in enumerator_scan_devices_all 
(enumerator=0x19e5690) at ../src/libsystemd/sd-device/device-enumerator.c:777
     #12 device_enumerator_scan_devices (enumerator=0x19e5690) at 
../src/libsystemd/sd-device/device-enumerator.c:844
     #13 udev_enumerate_scan_devices (udev_enumerate=<optimized out>, 
udev_enumerate=<optimized out>) at ../src/libudev/libudev-enumerate.c:377
     #14 0x00007f2430302f45 in ?? () from 
/opt/altera/20.1/quartus/linux64/libsys_cpt.so

I've tried to build a minimal test case, which succeeds:

     #include <libudev.h>

     int main(int argc, char **argv)
     {
         struct udev *u = udev_new();
         struct udev_enumerate *e = udev_enumerate_new(u);
         return udev_enumerate_scan_devices(e);
     }

With "succeeds", I guess you failed to reproduce the issue or do you mean you succeeded in building a minimal test case which reproduces the issue?

So, in order to get better debug information, I've tried to rebuild the
systemd package with debug information. For convenience, I did this inside
a container, and got several failing test cases. I then upgraded to the
version in sid to see if the problem had been solved in the meantime, but
building this package also failed:

Please consider filing an upstream issue at
https://github.com/systemd/systemd



Regards,
Michael

I'm not sure that the explicit asserts you see in the test suite inside docker are the same issue as the invalid pointer access you encountered above, so I probably wouldn't entangle them. It's likely that upstream has follow-up questions which you can answer better then me.

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