So when job gets terminated we don't succeed to write to to the disk and it is added to the unflushed list. Problem is another call to write function later on, but before we get writable disk signal: [ 7.460627]init: log_handle_unflushed:778:len=32673, path='/var/log/upstart/ureadahead-touch.log' [ 7.460682]init: unflushed->len=32673 [ 7.460736]init: job_process_terminated:1877:adding job ureadahead-touch to unflushed list
but then later one we get: [ 7.968094]init: log_io_reader:368: [ 7.968158]init: log_file_write:552:unflashed:61817, new_len:150, path:/var/log/upstart/ureadahead-touch.log [ 7.975087]init: log_file_write:579:unflashed->len:61817, written_len:61817 calling "nih_io_buffer_shrink (log->unflushed, (size_t)wlen);" [ 7.975167]init: log_file_write:581:unflashed->len:0 and eventually we get: [ 8.369166]init: control_notify_disk_writeable<< [ 8.369239]init: log_clear_unflushed<< [ 8.369280]init: OK checking assert:unflashed->len = 46 [ 8.369435]init: log_clear_unflushed:888: [ 8.369492]init: log_file_write:552:unflashed->len=46, new:0, path:/var/log/upstart/container-detect.log [ 8.370305]init: log_file_write:579:len:46, wlen:46 [ 8.370359]init: log_file_write:581:len:0 [ 8.370450]init: OK checking assert:unflashed->len = 0 [ 8.370509]init: log.c:874: Assertion failed in log_clear_unflushed: log->unflushed->len As you can see call to write in the middle is one causing the issue, since it flushes log buffer, but does not remove it from unflushed list. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to upstart in Ubuntu. https://bugs.launchpad.net/bugs/1447756 Title: segfault in log.c code causes phone reboot loops Status in the base for Ubuntu mobile products: Fix Committed Status in Upstart: New Status in upstart package in Ubuntu: Confirmed Bug description: We recently started getting reprots from phone users that their devices go into a reboot loop after changing the language or getting an OTA upgrade (either of both end with a reboot of the phone) after a bit of research we collected the log at http://pastebin.ubuntu.com/10872934/ this shows a segfault of upstarts init binary in the log.c code: [ 6.999083]init: log.c:819: Assertion failed in log_clear_unflushed: log->unflushed->len [ 7.000279]init: Caught abort, core dumped [ 7.467176]Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000600 To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1447756/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
