This is on a AMD Athlon64 X2 compiling kernel with make -2: [91550.438790] ================================================================================ [91550.438832] UBSAN: Undefined behaviour in lib/percpu_counter.c:92:14 [91550.438862] signed integer overflow: [91550.438888] 91550438785688 + 9223336756968817285 cannot be represented in type 'long long int' [91550.438923] CPU: 0 PID: 8875 Comm: cc1 Not tainted 4.18.0-rc3-00113-gfc36def997cf #11 [91550.438924] Hardware name: HP-Pavilion RT589AA-ABU t3709.uk/Nance, BIOS 5.02 11/26/2006 [91550.438924] Call Trace: [91550.438929] <IRQ> [91550.438937] dump_stack+0x5a/0x9b [91550.438941] ubsan_epilogue+0x9/0x40 [91550.438944] handle_overflow+0xf2/0x100 [91550.438946] percpu_counter_add_batch+0xfb/0x120 [91550.438949] cfq_completed_request+0x320/0xb00 [91550.438953] __blk_put_request+0x15d/0x390 [91550.438957] scsi_end_request+0x154/0x370 [91550.438960] scsi_io_completion+0x603/0x9e0 [91550.438963] blk_done_softirq+0xe6/0x1c0 [91550.438967] __do_softirq+0x118/0x414 [91550.438970] irq_exit+0xa2/0xd0 [91550.438972] do_IRQ+0xac/0x160 [91550.438974] common_interrupt+0xf/0xf [91550.438976] </IRQ> [91550.438978] RIP: 0033:0x7f54e89631b7 [91550.438979] Code: 83 f9 02 48 0f 47 cf 83 c1 7c e9 a9 fa ff ff 4c 8b 41 08 4c 89 c2 48 83 e2 f8 48 39 d3 0f 87 fb 00 00 00 48 8d 3c 11 48 8b 07 <48> 39 d0 0f 85 35 01 00 00 48 8b 51 10 48 8b 71 18 48 39 4a 18 0f [91550.439006] RSP: 002b:00007ffc7398a470 EFLAGS: 00000287 ORIG_RAX: ffffffffffffffde [91550.439007] RAX: 00000000000002a0 RBX: 0000000000000060 RCX: 0000000003311380 [91550.439009] RDX: 00000000000002a0 RSI: 00007f54e8c96f30 RDI: 0000000003311620 [91550.439010] RBP: 0000000000000004 R08: 00000000000002a1 R09: 00007f54e8c96cb0 [91550.439011] R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 [91550.439012] R13: 00007f54e8c96c40 R14: 0000000002e3b010 R15: 00007f54e8c96ca0 [91550.439013] ================================================================================
-- Meelis Roos (mr...@linux.ee)
