While running LTP tests (mmapstress03 specifically) against 5.18.0-rc4-next-20220428 booted on IBM Power server mentioned BUG is encountered. # ./mmapstress03 mmapstress03 0 TINFO : uname.machine=ppc64le kernel is 64bit mmapstress03: errno = 12: failed to fiddle with brk at the end mmapstress03 1 TFAIL : mmapstress03.c:212: Test failed [ 32.396145] mmap: mmapstress03 (3023): VmData 18446744073706799104 exceed data ulimit 18446744073709551615. Update limits or use boot option ignore_rlimit_data. [ 32.396192] ------------[ cut here ]------------ [ 32.396193] kernel BUG at mm/mmap.c:3164! [ 32.396195] Oops: Exception in kernel mode, sig: 5 [#1] [ 32.396210] LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries [ 32.396213] Modules linked in: dm_mod mptcp_diag xsk_diag tcp_diag udp_diag raw_diag inet_diag unix_diag af_packet_diag netlink_diag nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 rfkill ip_set bonding tls nf_tables nfnetlink sunrpc binfmt_misc pseries_rng drm drm_panel_orientation_quirks xfs libcrc32c sd_mod t10_pi sr_mod crc64_rocksoft_generic cdrom crc64_rocksoft crc64 sg ibmvscsi scsi_transport_srp ibmveth xts vmx_crypto fuse [ 32.396262] CPU: 5 PID: 3023 Comm: mmapstress03 Not tainted 5.18.0-rc4-next-20220428 #16 [ 32.396267] NIP: c0000000004c4750 LR: c0000000004c4730 CTR: c0000000004bf5d0 [ 32.396270] REGS: c00000001abeb810 TRAP: 0700 Not tainted (5.18.0-rc4-next-20220428) [ 32.396274] MSR: 8000000000029033 <SF,EE,ME,IR,DR,RI,LE> CR: 22002224 XER: 00000000 [ 32.396283] CFAR: c0000000008af740 IRQMASK: 0 [ 32.396283] GPR00: c0000000004c4730 c00000001abebab0 c000000002a71300 0000000000000000 [ 32.396283] GPR04: c000000079dcd000 ffffffffffffffff 0000000000000008 ffffffffffffffff [ 32.396283] GPR08: 0000000000000008 0000000000000001 0000000000000000 c000000079dcd040 [ 32.396283] GPR12: c000000079dcd008 c00000087fffa300 0000000000000000 0000000000000000 [ 32.396283] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 32.396283] GPR20: 0000000000000000 0000000000000000 0000000000000000 c000000002aaae85 [ 32.396283] GPR24: 0000000000000000 0000000000000000 00007fffaa5c1200 c000000020de3660 [ 32.396283] GPR28: 000000000000000c c000000020de3600 000000000000000d 0000000000000000 [ 32.396320] NIP [c0000000004c4750] exit_mmap+0x190/0x390 [ 32.396327] LR [c0000000004c4730] exit_mmap+0x170/0x390 [ 32.396332] Call Trace: [ 32.396334] [c00000001abebab0] [c0000000004c4730] exit_mmap+0x170/0x390 (unreliable) [ 32.396340] [c00000001abebbd0] [c0000000001700f4] __mmput+0x54/0x200 [ 32.396344] [c00000001abebc10] [c00000000017fe5c] exit_mm+0xfc/0x190 [ 32.396348] [c00000001abebc50] [c00000000018016c] do_exit+0x27c/0x5a0 [ 32.396352] [c00000001abebcf0] [c00000000018063c] do_group_exit+0x4c/0xd0 [ 32.396356] [c00000001abebd30] [c0000000001806e4] sys_exit_group+0x24/0x30 [ 32.396360] [c00000001abebd50] [c000000000037084] system_call_exception+0x254/0x550 [ 32.396364] [c00000001abebe10] [c00000000000bfe8] system_call_vectored_common+0xe8/0x278 [ 32.396369] --- interrupt: 3000 at 0x7fffaa318d04 [ 32.396374] NIP: 00007fffaa318d04 LR: 0000000000000000 CTR: 0000000000000000 [ 32.396377] REGS: c00000001abebe80 TRAP: 3000 Not tainted (5.18.0-rc4-next-20220428) [ 32.396380] MSR: 800000000280f033 <SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE> CR: 42002222 XER: 00000000 [ 32.396389] IRQMASK: 0 [ 32.396389] GPR00: 00000000000000ea 00007fffe43f3420 00007fffaa457100 0000000000000001 [ 32.396389] GPR04: 0000000000000000 0000000011a602a0 00007fffaa5c1200 0000000000000000 [ 32.396389] GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 32.396389] GPR12: 0000000000000000 00007fffaa5ca500 0000000000000000 0000000000000000 [ 32.396389] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 32.396389] GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000001 [ 32.396389] GPR24: 00007fffaa450938 0000000000000000 0000000000000001 00007fffaa4529f8 [ 32.396389] GPR28: 0000000000000001 00007fffaa5c3510 fffffffffffff000 0000000000000001 [ 32.396425] NIP [00007fffaa318d04] 0x7fffaa318d04 [ 32.396427] LR [0000000000000000] 0x0 [ 32.396429] --- interrupt: 3000 [ 32.396431] Instruction dump: [ 32.396433] 60000000 3880ffff 38610020 483eff5d 60000000 7c7f1b79 4082ffb8 813d0058 [ 32.396439] 7d29f278 7d290034 5529d97e 69290001 <0b090000> 60000000 7fa3eb78 483e328d [ 32.396447] ---[ end trace 0000000000000000 ]--- [ 32.398759] [ 33.398760] Kernel panic - not syncing: Fatal exception This problem was introduced with 5.18.0-rc4-next-20220427. I am unable to complete the git bisect due to build failure related to mapletree-vs-khugepaged issue. Thanks -Sachin
