Created attachment 1123325 [details] Dmesg Description of problem: [ 0.760826] ------------[ cut here ]------------ [ 0.760840] WARNING: CPU: 2 PID: 1 at arch/x86/mm/dump_pagetables.c:225 note_page+0x5e1/0x780() [ 0.760846] x86/mm: Found insecure W+X mapping at address ffff88000004e000/0xffff88000004e000 [ 0.760849] Modules linked in: [ 0.760857] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.4.1-300.fc23.x86_64 #1 [ 0.760861] Hardware name: LENOVO 4180WPD/4180WPD, BIOS 83ET76WW (1.46 ) 07/05/2013 [ 0.760865] 0000000000000000 00000000a0ed01b3 ffff8801193d3d48 ffffffff813b055f [ 0.760872] ffff8801193d3d90 ffff8801193d3d80 ffffffff810a2f12 ffff8801193d3e90 [ 0.760877] 8000000000000163 0000000000000004 0000000000000000 0000000000000000 [ 0.760883] Call Trace: [ 0.760894] [<ffffffff813b055f>] dump_stack+0x44/0x55 [ 0.760903] [<ffffffff810a2f12>] warn_slowpath_common+0x82/0xc0 [ 0.760909] [<ffffffff810a2fac>] warn_slowpath_fmt+0x5c/0x80 [ 0.760916] [<ffffffff8106f691>] note_page+0x5e1/0x780 [ 0.760923] [<ffffffff8106fb37>] ptdump_walk_pgd_level_core+0x307/0x450 [ 0.760931] [<ffffffff8106fd27>] ptdump_walk_pgd_level_checkwx+0x17/0x20 [ 0.760936] [<ffffffff81065a34>] mark_rodata_ro+0xf4/0x100 [ 0.760944] [<ffffffff8178d410>] ? rest_init+0x80/0x80 [ 0.760949] [<ffffffff8178d42d>] kernel_init+0x1d/0xe0 [ 0.760956] [<ffffffff8179948f>] ret_from_fork+0x3f/0x70 [ 0.760960] [<ffffffff8178d410>] ? rest_init+0x80/0x80 [ 0.760965] ---[ end trace 595f6a95704fa726 ]--- [ 0.780859] x86/mm: Checked W+X mappings: FAILED, 31117 W+X pages found. Version-Release number of selected component (if applicable): 4.4.1-300.fc23.x86_64 How reproducible: Steps to Reproduce: 1. 2. 3. Actual results: Expected results: Additional info:
I think this is a known issue with EFI. There was a fix proposed but it broke other things so it stalled (see http://article.gmane.org/gmane.linux.kernel.efi/7112). Given this is debugging informational only, I'm going to turn it off in stable releases and let it remain on in rawhide to catch bugs there.