Created attachment 425280 [details] full dmesg output I'm getting "BUG: Bad page map in process ..." messages in dmesg and probably lots of killed processes with hardened-sources-4.3.5-r2. This didn't happen with hardened-sources-4.3.5-r1. Here is a sample from dmesg: [54697.674573] BUG: Bad page map in process sleep pte:48341e33e41aedff pmd:34ac0067 [54697.674590] addr:17863000 vm_flags:04040000 anon_vma: (nil) mapping: (nil) index:1064 [54697.674604] file: (nil) fault: (nil) mmap: (nil) readpage: (nil) [54697.674621] CPU: 1 PID: 18462 Comm: sleep Tainted: G B W 4.3.5-hardened-r2 #1 [54697.674633] Hardware name: PhoenixAward 945GSE/945GSE, BIOS 6.00 PG 08/25/2009 [54697.674644] 00000000 002454a5 f5ad6090 000ea4a6 cff81834 00000000 00000000 00000000 [54697.674677] 00000000 00001064 e41aedff 48341e33 00001064 00000000 e41ae000 00000e33 [54697.674709] 48341e33 e41aedff 000eb7c3 e41aedff 48341e33 00000000 f5ad6090 17863000 [54697.674740] Call Trace: [54697.674762] [<002454a5>] ? dump_stack+0x3e/0x59 [54697.674781] [<000ea4a6>] ? print_bad_pte+0x166/0x1f0 [54697.674801] [<000eb7c3>] ? vm_normal_page+0x93/0xc0 [54697.674821] [<000ebad2>] ? unmap_single_vma+0x2e2/0x510 [54697.674841] [<000d7470>] ? SyS_readahead+0xe0/0xe0 [54697.674860] [<000ec48b>] ? unmap_vmas+0x3b/0x50 [54697.674877] [<000f3d20>] ? exit_mmap+0x80/0x100 [54697.674897] [<000490a4>] ? mmput+0x34/0xa0 [54697.674915] [<0023cd41>] ? gr_put_exec_file+0x11/0x50 [54697.674931] [<0004e07d>] ? do_exit+0x20d/0x8e0 [54697.674949] [<0004e7ae>] ? do_group_exit+0x2e/0xa0 [54697.674966] [<0004e82f>] ? SyS_exit_group+0xf/0x10 [54697.674983] [<005ab5aa>] ? syscall_call+0x7/0x7 [54697.675004] [<005ab5bc>] ? restore_all_pax+0xc/0xc [54697.675019] swap_free: Bad swap file entry 14e8a2f7 [54697.675031] swap_free: Bad swap file entry 010f9998 [54697.675044] swap_free: Bad swap file entry 1bab25c2 [54697.675058] swap_free: Bad swap file entry 19eff91a ... Full dmesg and .config attached. Hardware is an Intel Atom N270 x86 CPU with many NICs (Allnet FW8888).
Created attachment 425282 [details] kernel .config
The offending "sleep" process/call is coming from a while-loop in a bash script that is being run as a background daemon. The system is acting as a router/firewall - so it has some traffic on the interfaces. The hardware is an early 32bit-only Atom with hyperthreading enabled (see /proc/cpuinfo below). Note also, that the "NETDEV WATCHDOG: en1 (e1000): transmit queue 0 timed out" and subsequent "e1000 0000:05:0a.0 en1: Reset adapter" message is also appearing with other kernels and something I'm debugging separately (but might be related, see https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/net/ethernet/intel/e1000?id=9eab46b7cb8d0b0dcf014bf7b25e0e72b9e4d929 ). On hardened-sources-4.3.5-r1 I had 5 days uptime (before I rebooted into 4.3.5-r2) despite multiple tx-queue/adapter resets from the e1000). sgateway ~ # cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 microcode : 0x212 cpu MHz : 1596.073 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 0 initial apicid : 0 fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm bugs : bogomips : 3193.15 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 28 model name : Intel(R) Atom(TM) CPU N270 @ 1.60GHz stepping : 2 microcode : 0x212 cpu MHz : 1596.073 cache size : 512 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 1 apicid : 1 initial apicid : 1 fdiv_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 10 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx constant_tsc arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl est tm2 ssse3 xtpr pdcm movbe lahf_lm dtherm bugs : bogomips : 3193.15 clflush size : 64 cache_alignment : 64 address sizes : 32 bits physical, 32 bits virtual power management:
Also: The system does NOT have a swap partition: sgateway ~ # cat /proc/swaps Filename Type Size Used Priority sgateway ~ # Memory usage is low during normal operation: sgateway ~ # vmstat procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu----- r b swpd free buff cache si so bi bo in cs us sy id wa st 1 0 0 1962024 19680 39196 0 0 4 1 185 23 0 0 99 0 0
