[cc willy, linux-mm, as it crashed walking the page cache in the generic fault code] On Thu, Feb 09, 2023 at 10:43:10AM +0200, Avi Kivity wrote: > Workload: compilation and running unit tests. The task that crashed is > a unit test. > > Kernel: 6.1.8-200.fc37.x86_64 > > Previously known stable on 5.8.9-200.fc32.x86_64. Two crashes seen so > far. > > > Feb 7 17:19:33 localhost kernel: BUG: kernel NULL pointer dereference, > address: 0000000000000042 > Feb 7 17:19:33 localhost kernel: #PF: supervisor read access in kernel > mode > Feb 7 17:19:33 localhost kernel: #PF: error_code(0x0000) - not-present > page > Feb 7 17:19:33 localhost kernel: PGD 80000001cbb1f067 P4D > 80000001cbb1f067 PUD 9cbb75067 PMD 0 > Feb 7 17:19:33 localhost kernel: Oops: 0000 [#1] PREEMPT SMP PTI > Feb 7 17:19:33 localhost kernel: CPU: 24 PID: 3718328 Comm: > transport_test Tainted: G S 6.1.8-200.fc37.x86_64 #1 > Feb 7 17:19:33 localhost kernel: Hardware name: Dell Inc. PowerEdge > R730/0599V5, BIOS 2.9.1 12/04/2018 > Feb 7 17:19:33 localhost kernel: RIP: > 0010:next_uptodate_page+0x46/0x200 > Feb 7 17:19:33 localhost kernel: Code: 0f 84 3f 01 00 00 48 81 ff 06 > 04 00 00 0f 84 b3 00 00 00 48 81 ff 02 04 00 00 0f 84 37 01 00 00 40 f6 > c7 01 0f 85 9c 00 00 00 <48> 8b 07 a8 01 0f 85 91 00 00 00 8b 47 34 85 > c0 0f 84 86 00 00 00 > Feb 7 17:19:33 localhost kernel: RSP: 0000:ffffa83e4ed67cc8 EFLAGS: > 00010246 > Feb 7 17:19:33 localhost kernel: RAX: 0000000000000042 RBX: > ffffa83e4ed67e00 RCX: 000000000000146e > Feb 7 17:19:33 localhost kernel: RDX: ffffa83e4ed67d20 RSI: > ffff94a9046316b0 RDI: 0000000000000042 > Feb 7 17:19:33 localhost kernel: RBP: ffffa83e4ed67d20 R08: > 000000000000146e R09: 0000000000dfd000 > Feb 7 17:19:33 localhost kernel: R10: 000000000000145f R11: > ffff94978b85960c R12: ffff94a9046316b0 > Feb 7 17:19:33 localhost kernel: R13: 000000000000146e R14: > ffff94a9046316b0 R15: ffff948f8bb1f000 > Feb 7 17:19:33 localhost kernel: FS: 00007fd68fcb9d40(0000) > GS:ffff949dffd00000(0000) knlGS:0000000000000000 > Feb 7 17:19:33 localhost kernel: CS: 0010 DS: 0000 ES: 0000 CR0: > 0000000080050033 > Feb 7 17:19:33 localhost kernel: CR2: 0000000000000042 CR3: > 00000001dc1be005 CR4: 00000000001706e0 > Feb 7 17:19:33 localhost kernel: Call Trace: > Feb 7 17:19:33 localhost kernel: <TASK> > Feb 7 17:19:33 localhost kernel: filemap_map_pages+0x9f/0x7b0 > Feb 7 17:19:33 localhost kernel: xfs_filemap_map_pages+0x41/0x60 [xfs] > Feb 7 17:19:33 localhost kernel: do_fault+0x1bf/0x430 > Feb 7 17:19:33 localhost kernel: __handle_mm_fault+0x63d/0xe40 > Feb 7 17:19:33 localhost kernel: ? do_sigaction+0x11a/0x240 > Feb 7 17:19:33 localhost kernel: handle_mm_fault+0xdb/0x2d0 > Feb 7 17:19:33 localhost kernel: do_user_addr_fault+0x1cd/0x690 > Feb 7 17:19:33 localhost kernel: exc_page_fault+0x70/0x170 > Feb 7 17:19:33 localhost kernel: asm_exc_page_fault+0x22/0x30 > Feb 7 17:19:33 localhost kernel: RIP: 0033:0x1666350 > Feb 7 17:19:33 localhost kernel: Code: Unable to access opcode bytes > at 0x1666326. > Feb 7 17:19:33 localhost kernel: RSP: 002b:00007ffde7fa86d8 EFLAGS: > 00010212 > Feb 7 17:19:33 localhost kernel: RAX: 0000000000000000 RBX: > 00007ffde7fa8748 RCX: 0000000002ed4468 > Feb 7 17:19:33 localhost kernel: RDX: 00006000000c4f50 RSI: > 00007ffde7fa8748 RDI: 0000000000000012 > Feb 7 17:19:33 localhost kernel: RBP: 0000000000000012 R08: > 0000000000000001 R09: 0000000002f46860 > Feb 7 17:19:33 localhost kernel: R10: 00007fd69219cac0 R11: > 00007fd69224e670 R12: 0000000000000000 > Feb 7 17:19:33 localhost kernel: R13: 00006000000c4f50 R14: > 0000000002ed4470 R15: 00007fd693be0000 > Feb 7 17:19:33 localhost kernel: </TASK> > Feb 7 17:19:33 localhost kernel: Modules linked in: xsk_diag veth tls > xt_conntrack xt_MASQUERADE nf_conntrack_netlink xt_addrtype nft_compat > br_netfilter bridge stp llc intel_rapl_msr dell_wmi iTCO_wdt > dell_smbios intel_pmc_bxt iTCO_vendor_support dell_wmi_descriptor > ledtrig_audio sparse_keymap video dcdbas intel_rapl_common sb_edac > x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel kvm ipmi_ssif > irqbypass rapl intel_cstate intel_uncore ipmi_si ipmi_devintf > ipmi_msghandler 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 > overlay ip_set nf_tables nfnetlink qrtr acpi_power_meter mxm_wmi mei_me > mei lpc_ich auth_rpcgss ip6_tables ip_tables sunrpc zram xfs > crct10dif_pclmul crc32_pclmul nvme crc32c_intel polyval_clmulni > polyval_generic ixgbe ghash_clmulni_intel nvme_core sha512_ssse3 > megaraid_sas tg3 mgag200 mdio nvme_common dca wmi scsi_dh_rdac > scsi_dh_emc scsi_dh_alua > Feb 7 17:19:33 localhost kernel: dm_multipath fuse > Feb 7 17:19:33 localhost kernel: CR2: 0000000000000042 > Feb 7 17:19:33 localhost kernel: ---[ end trace 0000000000000000 ]--- > Feb 7 17:19:33 localhost kernel: RIP: > 0010:next_uptodate_page+0x46/0x200 > Feb 7 17:19:33 localhost kernel: Code: 0f 84 3f 01 00 00 48 81 ff 06 > 04 00 00 0f 84 b3 00 00 00 48 81 ff 02 04 00 00 0f 84 37 01 00 00 40 f6 > c7 01 0f 85 9c 00 00 00 <48> 8b 07 a8 01 0f 85 91 00 00 00 8b 47 34 85 > c0 0f 84 86 00 00 00 > Feb 7 17:19:33 localhost kernel: RSP: 0000:ffffa83e4ed67cc8 EFLAGS: > 00010246 > Feb 7 17:19:33 localhost kernel: RAX: 0000000000000042 RBX: > ffffa83e4ed67e00 RCX: 000000000000146e > Feb 7 17:19:33 localhost kernel: RDX: ffffa83e4ed67d20 RSI: > ffff94a9046316b0 RDI: 0000000000000042 > Feb 7 17:19:33 localhost kernel: RBP: ffffa83e4ed67d20 R08: > 000000000000146e R09: 0000000000dfd000 > Feb 7 17:19:33 localhost kernel: R10: 000000000000145f R11: > ffff94978b85960c R12: ffff94a9046316b0 > Feb 7 17:19:33 localhost kernel: R13: 000000000000146e R14: > ffff94a9046316b0 R15: ffff948f8bb1f000 > Feb 7 17:19:33 localhost kernel: FS: 00007fd68fcb9d40(0000) > GS:ffff949dffd00000(0000) knlGS:0000000000000000 > -- Dave Chinner david@xxxxxxxxxxxxx
