Red Hat Bugzilla – Bug 1476557
System becomes unusable after VM_BUG_ON_PAGE(page_ref_count(page) == 0)
Last modified: 2017-07-30 06:02:45 EDT
Created attachment 1306542 [details] syslog entry for kernel BUG Description of problem: After upgrading from Fedora 25 (which worked fine) to Fedora 26, The following happens: - System starts without obvious problems - Desktop environment (FVWM) starts without obvious problems - everything appears to be working fine - when I try to start firefox, I get the following messages on the console: Message from syslogd@nyx at Jul 30 11:40:10 ... kernel:page:fffff5c5061e2600 count:0 mapcount:-127 mapping: (null) index:0x0 Message from syslogd@nyx at Jul 30 11:40:10 ... kernel:flags: 0x17ffffc0000000() ...and firefox does not come up. The syslog contains an error entry (see attachment): Jul 30 11:40:10 nyx kernel: page:fffff5c5061e2600 count:0 mapcount:-127 mapping: (null) index:0x0 Jul 30 11:40:10 nyx kernel: flags: 0x17ffffc0000000() Jul 30 11:40:10 nyx kernel: raw: 0017ffffc0000000 0000000000000000 0000000000000000 00000000ffffff80 Jul 30 11:40:10 nyx kernel: raw: fffff5c507670020 ffff9b061ffd1ef8 0000000000000003 0000000000000000 Jul 30 11:40:10 nyx kernel: page dumped because: VM_BUG_ON_PAGE(page_ref_count(page) == 0) Jul 30 11:40:10 nyx kernel: ------------[ cut here ]------------ Jul 30 11:40:10 nyx kernel: kernel BUG at ./include/linux/mm.h:462! Jul 30 11:40:10 nyx kernel: invalid opcode: 0000 [#2] SMP - From then, all attempts to access the filesystem (i. e. a simple "ls /" will hang permanently in uninterruptable sleep ('D' in ps). - in 4 out of 5 attepmts this happened while firefox was starting, before any window was displayed. - in one attempt firefox came up, but the same error happened when I tried to open a web page. Running another kernel in the same installation works fine (kernel-4.11.12-200.fc25.x86_64 - i. e. basically same kernel version, but previous fedora release) Version-Release number of selected component (if applicable): kernel-4.11.12-100.fc24.x86_64 How reproducible: Always Steps to Reproduce: 1. Boot the system 2. Login 3. start firefox Actual results: Kernel Bug, system becomes unusable Expected results: no bug Additional info: see attachment for full syslog entry