The attached file provides debug info regarding the page fault generated by systemd-udevd. The fault appears to occur in builtin_net_setup_link. The faulting instruction comes from line 64 in ../src/basic/string-util.h.
As noted, version 244.3-1 does not fault. Later versions do. Hope this helps. Regards, Dave Anglin -- John David Anglin dave.ang...@bell.net
Page fault occurs in page 0. Apr 16 21:24:30 atlas kernel: do_page_fault() command='systemd-udevd' type=15 address=0x00000005 in systemd-udevd[4109c000+9f000] Apr 16 21:24:30 atlas kernel: trap #15: Data TLB miss fault Apr 16 21:24:30 atlas kernel: CPU: 1 PID: 1152 Comm: systemd-udevd Not tainted 4.14.176+ #1 Apr 16 21:24:30 atlas kernel: Hardware name: 9000/785/C8000 Apr 16 21:24:30 atlas kernel: task: 000000412e148ac0 task.stack: 000000412e1b4000 Apr 16 21:24:30 atlas kernel: Apr 16 21:24:30 atlas kernel: YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI Apr 16 21:24:30 atlas kernel: PSW: 00000000000001001111111000001111 Not tainted Apr 16 21:24:30 atlas kernel: r00-03 000000ff0004fe0f 0000000f00000000 00000000410f9093 00000000411c9368 Apr 16 21:24:30 atlas kernel: r04-07 000000004114b000 0000000000000000 0000000000000000 00000000f8f1740c Apr 16 21:24:30 atlas kernel: r08-11 00000000411a19a8 0000000041153840 00000000411541b0 00000000f8f1742c Apr 16 21:24:30 atlas kernel: r12-15 000000004115a980 00000000f8f17448 00000000f8f17440 00000000f8f1754c Apr 16 21:24:30 atlas kernel: r16-19 00000000f8f17348 0000000041134a30 00000000f8f17444 000000004114b000 Apr 16 21:24:30 atlas kernel: r20-23 0000000000000000 0000000000000056 00000000f8b0f1ba 000000000000001b Apr 16 21:24:30 atlas kernel: r24-27 0000000041131648 000000000000001e 0000000000000005 000000004114b000 Apr 16 21:24:30 atlas kernel: r28-31 fffffffffffffffe 000000000000000f 00000000f8f17580 00000000410c9223 Apr 16 21:24:30 atlas kernel: sr00-03 000000000007b800 0000000000000000 0000000000000000 000000000007b800 Apr 16 21:24:30 atlas kernel: sr04-07 000000000007b800 000000000007b800 000000000007b800 000000000007b800 Apr 16 21:24:30 atlas kernel: Apr 16 21:24:30 atlas kernel: VZOUICununcqcqcqcqcqcrmunTDVZOUI Apr 16 21:24:30 atlas kernel: FPSR: 00000000000000000000000000000000 Apr 16 21:24:30 atlas kernel: FPER1: 00000000 Apr 16 21:24:30 atlas kernel: fr00-03 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: fr04-07 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: fr08-11 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: fr12-15 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: fr16-19 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: fr20-23 0000000000000000 0000000000000000 00000000000000e0 00000000000001e0 Apr 16 21:24:30 atlas kernel: fr24-27 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: fr28-31 0000000000000000 0000000000000000 0000000000000000 0000000000000000 Apr 16 21:24:30 atlas kernel: Apr 16 21:24:30 atlas kernel: IASQ: 000000000007b800 000000000007b800 IAOQ: 00000000410f8dc3 00000000410f8dc7 Apr 16 21:24:30 atlas kernel: IIR: 0f40101c ISR: 000000000007b800 IOR: 0000000000000005 Apr 16 21:24:30 atlas kernel: CPU: 1 CR30: 000000412e1b4000 CR31: 17fcfcfa83419f83 Apr 16 21:24:30 atlas kernel: ORIG_R28: 0000000000000000 Apr 16 21:24:30 atlas kernel: IAOQ[0]: 00000000410f8dc3 Apr 16 21:24:30 atlas kernel: IAOQ[1]: 00000000410f8dc7 Apr 16 21:24:30 atlas kernel: RP(r2): 00000000410f9093 Instruction at IAOQ[0] matches fault instruction in IIR. Register r26 contains page fault address 5. (gdb) disass 0x410f8dc0-16,0x410f8dc0+16 Dump of assembler code from 0x410f8db0 to 0x410f8dd0: 0x410f8db0 <builtin_net_setup_link+7744>: copy r3,r26 0x410f8db4 <builtin_net_setup_link+7748>: copy r4,r19 0x410f8db8 <builtin_net_setup_link+7752>: ldw 0(r7),r26 0x410f8dbc <builtin_net_setup_link+7756>: cmpib,=,n 0,r26,0x410f8df0 <bui> 0x410f8dc0 <builtin_net_setup_link+7760>: ldb 0(r26),ret0 0x410f8dc4 <builtin_net_setup_link+7764>: cmpiclr,<> 0,ret0,r0 0x410f8dc8 <builtin_net_setup_link+7768>: b,l,n 0x410f8df0 <builtin_net_s0 0x410f8dcc <builtin_net_setup_link+7772>: b,l 0x410f3808,rp End of assembler dump. 20: 0f 40 10 1c ldb 0(r26),ret0 24: 93 80 30 00 cmpiclr,<> 0,ret0,r0 (gdb) break *0x410f8dc0 Breakpoint 1 at 0x410f8dc0: file ../src/basic/string-util.h, line 64.