Segfault while trying to verify fingerprint
I use the fprintd pam module to verify my sudo usage, and yesterday it hung for a while before eventually reporting a timeout and requesting my password. When I checked dmesg some time later I found the following messages which seem to be related to this. (It's not really repeatable unfortunately; my fingerprint reader has been working just fine before that and after as well.)
[13356.589298] usb 4-2.4: reset full-speed USB device number 6 using xhci_hcd
[13359.449610] fprintd[355436]: segfault at 0 ip 00007ffb9f375385 sp 00007ffddc26ba90 error 4 in libfprint-2.so.2.0.0[7ffb9f360000+3e000]
[13359.449627] Code: 00 00 0f 1f 00 49 8b 7c 24 08 48 83 c4 08 48 89 ee 5d 41 5c e9 2c 5a 01 00 66 66 2e 0f 1f 84 00 00 00 00 00 90 49 8b 44 24 20 <f6> 00 04 74 16 49 8b 7c 24 08 48 83 c4 08 5d 41 5c e9 f5 5a 01 00
[13359.449695] audit: type=1701 audit(1596386410.835:39): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=355436 comm="fprintd" exe="/usr/libexec/fprintd" sig=11 res=1
[13359.467886] audit: type=1334 audit(1596386410.855:40): prog-id=20 op=LOAD
[13359.467971] audit: type=1334 audit(1596386410.855:41): prog-id=21 op=LOAD
[13359.468053] audit: type=1334 audit(1596386410.855:42): prog-id=22 op=LOAD
[13360.044111] audit: type=1334 audit(1596386411.435:43): prog-id=22 op=UNLOAD
[13360.044126] audit: type=1334 audit(1596386411.435:44): prog-id=21 op=UNLOAD
[13360.044133] audit: type=1334 audit(1596386411.435:45): prog-id=20 op=UNLOAD
[13389.357416] usb 4-2.4: reset full-speed USB device number 6 using xhci_hcd